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+Release Notes for Version 2.69
+
+A segmentation fault in subpath3 was fixed. The fuzz parameter in bezulate
+was increased to handle font precision issues. A missing above argument was
+added in plain_boxes.asy. Scaling bugs in the palette module were fixed.
+The contour module now respects picture scaling. Bugs in reading null
+fields were fixed. Orthographic scaling is now consistent with perspective
+scaling when keepAspect=false. The obsolete everypage package was removed.
+A compilation issue with LIBCURL and compilation warnings were fixed.
+
+Release Notes for Version 2.68
+
+Floating point exceptions in OpenGL libraries are now masked.
+A normalization used to render tubes was fixed. A Label align(Label,dir)
+function was added for aligning label normals. A new settings.compress=true
+option controls PDF image compression. A bool isometry(transform) function
+was added. Various bugs in the geometry module were fixed.
+The transpose function ignores uninitialized elements.
+Null fields are treated as undefined values in cvs mode and in line mode.
+Uninitialized rendering variables were fixed. A RELEASE variable was added.
+Logarithmic graphs of surfaces are supported. Files are opened
+without assuming an asy suffix. Support for Ghostscript 9.53 was implemented.
+The end argument of Margin functions is now optional. A function
+cputime().change.clock that returns the high-resolution elapsed wall clock
+time was added. A --disable-curl option was added.
+The centering of slides was fixed. Null characters and null strings are
+supported in the replace function. Configuration without readline support
+was fixed. In binary mode, an entire file can be read into a string.
+The getc function now works properly when reading the NUL character.
+Reproducible builds are supported.
+
+Release Notes for Version 2.67
+
+Support was added for importing and inputting URLs. Compilation and 2D SVG
+to HTML conversion no longer requires the GLM library; 2D html output is
+fit to the canvas unless settings.absolute=true. Diagnostics for dvisvgm
+were enabled; SVG clipping was fixed. A -globalread setting (default true)
+was implemented. Files are opened using the search path, which now
+includes the examples directory. An invalid array dimensions error was fixed.
+A WebGL resize event listener was added; the + and - keys now zoom in and out,
+rather than expanding and shrinking the viewport. Remeshing on export is
+forced; unnecessary remeshing on zoom in AsyGL is avoided.
+The triple dir(path3, path3) function was normalized. The repositioning of
+OpenGL windows was fixed. The copy constructors for path and path3 were fixed.
+Asymptote errors no longer cause Xasy to hang. A numerical precision issue
+was fixed. A portable way of skipping whitespace was implemented; casts
+from empty strings now yield uninitialized values. Interrupt handling under
+MacOS X was fixed. A devicepixelratio setting was implemented. The error
+location is displayed in the console. Segmentation faults were fixed.
+The documentation was updated and the code was reformatted. A hang on exit
+under MSWindows was fixed. Obsolete encoding modules were removed.
+
+Release Notes for Version 2.66
+
+A bug in the Bezier patch bounds was fixed. Vertex and material data are
+copied from the CPU to GPU only when necessary. The default Headlamp light
+was brightened. WebGL output is centered in the viewport, extending to the
+canvas boundary; the precision of planar Bezier surfaces was increased
+to avoid artifacts. Fullscreen mode has been fixed; the new default
+maxviewport=(0,0) specifies the screen dimensions. Camera adjustment was fixed.
+Problems with Xasy and interactive signals under MSWindows were fixed.
+A background color for both 2D and 3D images can be specified with
+currentlight.background. Offscreen rendering on headless machines has been
+reinstated; while the setting offscreen has been removed, one can again
+configure asy for either onscreen or offscreen rendering. Clipping was removed
+from the slopefield module. Functions mapArray, mapTemplate, real abs2(pair),
+and real abs2(triple) were implemented. The new Ghostscript transparency model
+requires Ghostscript 9.52 or later. The detection of TeX errors was improved.
+An array segmentation fault was fixed; array dimensions are checked.
+Flattened monochrome tensor patches with interior internal control points are
+now drawn as filled cyclic paths. PDF offsets were fixed, along with the
+auto-reload feature for Acroread. SVG support was improved; 2D images can now
+be output in HTML format using inline SVG code, to support the
+Asymptote Web Application, a new cloud service at http://asymptote.ualberta.ca.
+
+Release Notes for Version 2.65
+
+A bug in rendering 2D preview images of a 3D scene was fixed.
+The 100-error TeX limit is gracefully detected, rather than hanging.
+A more accurate Bezier approximation to the sphere was implemented.
+An initial perpendicular direction can now be specified for the
+rotation minimizing frame for a path3; the previous direction is
+no longer cached between calls.
+
+Release Notes for Version 2.64
+
+Discontinuities were removed from the rotation minimizing frame used for
+constructing tubes. A work around was implemented for an incorrect
+declaration in obsolete versions of the NetBSD readline header file.
+
+Release Notes for Version 2.63
+
+A race condition in the AsyGL library was fixed. Emissive and
+shininess values can be overridden for vertex colors. Thin Bezier
+curves can be drawn with lighting enabled. Outline mode for 3D surfaces
+was fixed; outline and mesh mode were ported to WebGL. Degenerate
+surface normals were fixed. The octant1, hemisphere, and sphere
+surfaces were replaced by nondegenerate versions that render faster.
+The unitcone, unitfrustum, and DefaultHead3 arrowhead were simplified.
+A robust and more efficient tube routine was implemented;
+the PRC tube primitive was removed. WebGL compression was achieved by
+implementing sphere, disk, cylinder, and tube primitives in the AsyGL library.
+Patches are now split in both directions only when required.
+If the GNU Readline library is unavailable, the Editline library
+is used to at least support command-line editing, without history features.
+An MSDOS configuration issue was fixed.
+
+Release Notes for Version 2.62
+
+A hyperbola(point F1, point F2, point M) function was added to the
+geometry module. Duplicate intersections are avoided. Errors in the
+texpreamble are handled gracefully, without hanging. Unwanted
+indentation under LuaLaTex was removed. The WebGL canvas is populated
+with the design width and height. The WebGL context is stored in the top
+rather than parent window. To avoid polling, WebGL images now draw directly.
+Zooming of embedded WebGL images is disabled until activated with a
+click or touch event, using ESC to cancel activation. WebGL usage
+comments now suggest embedding as an iframe rather than an object.
+The obsolete grffile package is no longer used. Typos in the documentation
+were fixed.
+
+Release Notes for Version 2.61
+
+Bugs in the OpenGL driver were fixed. A work around for the WebGL singleton
+array optimization bug on the Intel GPU was fixed. OpenGL and WebGL attributes
+are now bound before linking the shaders. Bland's rule is implemented correctly
+in the simplex solvers. A missing data file was added.
+
+Release Notes for Version 2.60
+
+Transparent WebGL backgrounds were fixed. A build issue involving the revision
+number was fixed. The locatefile function now returns the fully qualified
+file name. The htmlviewer uses the absolute path for all platforms;
+it is also used for displaying svg files. SVG output for embedded PNG, JPEG,
+and external vector EPS and PDF images is supported with the latex TeX
+engine and dvisvgm 2.8. The simplex solver was optimized. A pad function that
+pads a picture to a precise size in both directions was introduced.
+The xasy front end was ported to high-resolutions screens and handles Ctrl-C
+interrupts correctly. Objects can be positioned finely with the arrow keys
+while holding down the mouse button. The origin/center order and anchor names
+were fixed. A front/back detection bug in the solids module was fixed.
+The grffile package fixes issues with included file names.
+This release requires Version 1.34 of asymptote.sty (auto-generated).
+
+
+Release Notes for Version 2.59
+
+OpenGL memory allocation and transparency bugs introduced in version 2.54 were
+fixed. Rendering efficiency was improved. In view of limited GPU resources,
+only the required material uniforms are passed to each shader.
+The WebGL vertex and fragment shaders have been moved to the asygl library.
+Multiple embedded images now share a single WebGL context and shaders,
+to work around browser limitations. A bug in 3D arrows was fixed.
+Unavailable material attributes are now ignored. Miscellaneous Python support
+files were ported to Python3. The obsolete maxvertices setting was removed.
+
+Release Notes for Version 2.58
+
+Intersection points in geometry.asy are now returned in currentcoordsys;
+a numerical precision issue was also fixed. Ambiguous function signatures
+in geometry.asy are resolved by requiring explicit casts when converting
+general forms to special cases. The xasy editor selection is now consistent.
+Building the asymptote.so shared library is supported again.
+A bug in rendering indexed triangle arrays was fixed. Execution errors in
+support utilities are now handled gracefully. Due to current limitations of
+dvisvgm (2.7.4), graphic() can only display SVG output (used by the xasy
+vector editor) for external vector EPS graphics (embedded images, PDF, PNG,
+and JPG formats are not yet supported). Building under CYGWIN with X11 is
+supported again. The --version option lists both enabled and disabled features.
+The GLX library is explicitly linked if present.
+
+Release Notes for Version 2.57
+
+Scenes with lighting disabled are rendered correctly in WebGL.
+Attempting to output HTML for 2D pictures produces an SVG file.
+A conditional was removed from the fragment shaders. A viewportshift option
+was added to the WebGL driver; the home (h) option now forces a remesh.
+The version number was removed from the local offline copy of asygl.
+A numerical degeneracy in the conic sections intersection routine
+was fixed. A workaround for the broken XDR headers under MacOS X was
+implemented. An issue with animations was fixed. The --version option displays
+a list of compiled-in features.
+
+Release Notes for Version 2.56
+
+An array bounds error was fixed. WebGL output now supports background
+colors, including transparent backgrounds. Preprocessor conditionals were
+fixed. Scrolling of webgl images is now disabled within the viewport.
+
+Release Notes for Version 2.55
+
+An initialization bug in the OpenGL renderer and portability issues were
+fixed.
+
+Release Notes for Version 2.54
+
+Support for generating and embedding interactive 3D WebGL vector graphics
+within an HTML file has been added, allowing Asymptote figures
+to be displayed on modern mobile and desktop browsers. The OpenGL rendering
+routines were further optimized, yielding higher frame rates and
+lower memory usage. The view position for perspective projection was fixed.
+The default value of file word() was fixed. Installation issues were
+addressed. A new digits setting controls the default output file precision.
+A hanging pipe was fixed. The popcount function was extended to
+systems that lack 64-bit integers. The order of PRC quad colours was fixed.
+If lighting is enabled, vertex colors are now ignored in PRC images;
+when drawing a surface s, use draw(s,prc() ? nolight : currentlight);
+to disable lighting manually and recover the old behaviour.
+
+Release Notes for Version 2.53
+
+A memory leak and antialiasing artifacts in the 3D rendering engine were fixed.
+For PRC content, oblique projections are now converted to orthographic
+projections. Portability issues were addressed.
+
+Release Notes for Version 2.52
+
+Under MacOS X, 3D rendering is supported again, the xasy menubar is
+now visible, and the default PostScript previewer was changed to "open".
+VISUAL, EDITOR, and OS-specific editor overrides are now supported in xasy.
+Obsolete code was removed and spelling mistakes were fixed.
+
+Release Notes for Version 2.51
+
+Portability fixes for FreeBSD x86 and MacOS X were made.
+
+Release Notes for Version 2.50
+
+The Phong-Blinn lighting model was replaced by a physically based rendering
+model; the ambient attribute was removed. Various portability and build issues
+were addressed. OpenGL is supported again for both 32-bit and 64-bit MSWindows.
+
+Release Notes for Version 2.49
+
+Portability issues and numerical precision issues were fixed.
+
+Release Notes for Version 2.48
+
+The OpenGL code was modernized to use GLSL shaders. Transparent
+triangles of different materials are now sorted before drawing.
+The viewport option from the light function was removed.
+A workaround was implemented for the Ghostscript transparency extension
+-dSAFER bug. Bugs in the simplex method were fixed. Experimental
+offscreen rendering is now disabled by default due to NVIDIA conflicts.
+The min, max, minratio, maxratio, and intersection calculations were
+accelerated. A workaround was implemented for broken Intel GPU drivers
+under MSWindows.
+
+Release Notes for Version 2.47
+
+Further shipout and scaling problems were fixed. Unused files were removed.
+Multiple-page documents now produce PS instead of EPS output.
+
+Release Notes for Version 2.46
+
+The pen width is now accounted for in the bbox function. The relative
+alignment of a label to a path now transforms correctly with picture
+rotation. Various shipout issues were fixed. The ghostscript library
+location from the MSWindows registry is now ignored for compatibility
+with TeXLive.
+
+Release Notes for Version 2.45
+
+The xasy graphical front end for Asymptote has been rewritten to
+support code reordering, using Qt5 and scalable vector graphics.
+An uninitialized counter was fixed. A stable=true option was added to sort.
+The restricted simplex method has been replaced by a complete simplex
+solver that handles general size constraints. The rpc library has been
+replaced by the tirpc library. The dvips utility is forced to respect
+EPS requirements again. The system ghostscript library is now used by
+default for dvisvgm. Make clean now removes GSL symbols. The MSWindows
+system path is no longer modified by the installer. A CLZ bug was fixed.
+
+Release Notes for Version 2.44
+
+Floating point exceptions are masked again under CYGWIN, pending strtod bug fix
+(issue #65). Various portability issues were also addressed.
+
+Release Notes for Version 2.43
+
+The real modulo operator was fixed. Vector SVG output is now supported for
+PDF tex engines. Compilation under MacOS X was fixed. Both 32- and 64-bit
+MSWindows binaries are now available.
+
+Release Notes for Version 2.42
+
+Bitreverse and popcount functions were added. An overflow in the modulo
+operator was fixed. An asymmetry in angle(transform t) was fixed so that
+angle(yscale(-1))=0. Missing 3D underline characters were fixed.
+The MSWindows binary is now 64-bit.
+
+Release Notes for Version 2.41
+
+The rendering of Bezier patches was improved. Minor improvements were made
+to perpendicular marks in the geometry package. A perl issue was addressed.
+Two unwanted temporary files are now removed after TeX processing.
+EPS output is now supported with all TeX engines. A workaround was
+implemented for the ImageMagick jpeg black background bug.
+
+Release Notes for Version 2.40
+
+A partial workaround for the OpenGL transparency bug was implemented, by
+presorting transparent triangles of the same material. The examples were
+updated and a segmentation fault was fixed. Multisample detection, surface
+rendering, and crack filling algorithms were fixed. The default compilation
+flags now specify -std=c++11.
+
+Release Notes for Version 2.39
+
+A workaround was implemented for the backwards incompatibility in the
+TeXLive 2016 graphicx package. Empty tick labels in graphs are now avoided.
+A paletteticks NoTicks option was added. Support for lualatex was improved.
+Renderers for Bezier patches and curves more efficient than those
+in the deprecated GLU library were implemented.
+
+Release Notes for Version 2.38
+
+An integer division operator # was added. Control points in xasy are now
+correctly parsed. Longitudinal splitting in the revolution structure of
+the solids module was fixed. Portability fixes were implemented.
+The ncurses library is now only required with --enable-readline.
+A --disable-sigsegv configuration option was added.
+
+Release Notes for Version 2.37
+
+The xasy graphical user interface now runs under both Python 2.7 and Python 3.
+Legacy versions (prior to 9.14) of Ghostscript can be supported by
+assigning settings.epsdriver="epswrite" (or by setting the environment
+variable ASYMPTOTE_EPSDRIVER to epswrite). The quiet flag suppresses
+noninteractive standard output when settings.verbosity <= 1. A progress
+function was added to the plain_strings module. The smoothcontour3 module
+was optimized to use Bezier triangles where appropriate, along with a
+built-in least-squares routine and an improved root finder based on
+quadratic interpolation. If settings.sysdir is empty, preference is given
+to a version of kpsewhich in the same directory as the executable for
+determining the correct sysdir. The handling of degenerate normals of
+Bezier triangles was fixed. Bugs in forking, integer formatting, dash
+adjustment, subpaths, and guide reversion were fixed. Version 1.30 of
+asymptote.sty (auto-generated) and version 0.35 (or later) of media9.sty
+are now required.
+
+Release Notes for Version 2.36
+
+Bezier triangle patches have been implemented in place of degenerate Bezier
+tensor product patches. Surface rendering was improved. The configuration
+of the readline and gc libraries was fixed. The asy configuration
+directory is only created if localhistory=false. Patches are now sorted by
+projected distance. Animations were fixed by running LaTeX twice.
+The asy-mode.el headers were updated. Intermittent segmentation faults and
+floating point exceptions in the OpenGL renderer were fixed. Support for
+GSL 2.0 was added. A quite nan constant was added. Straight segments are no
+longer split in bezulate. Segmentation faults in tab completion were fixed.
+A work around for a clang 3.7.0 compiler bug was implemented.
+The smoothcontour routine was sped up. Several bugs in the file read routines
+were fixed. A bug in rest argument signature equivalence was fixed.
+Threads are no longer used in batch mode, except under MacOS X. A convenience
+function graphicscale was added for using graphic with the conTeXt tex
+engine. The splinetype detection for Spline surfaces was fixed.
+
+Release Notes for Version 2.35
+
+A work around was implemented for a ghostscript eps2write bug that forces
+all postscript to the first page, breaking multiple 3D XeLaTeX and ConTeXt
+labels.
+
+Release Notes for Version 2.34
+
+The readability of named pen colors was improved in the documentation.
+A surface cone(path3 base, triple vertex) routine was added for
+constructing an approximate cone over an arbitrary base. A test for
+Ghostscript 9.14 or later was added to the build process. The documentation
+was updated. A CYGWIN warning message under Windows 8 was fixed.
+
+Release Notes for Version 2.33
+
+A work around was implemented for the missing epswrite driver in
+ghostscript-9.15. Deconstruction is now always done in the C locale.
+A work around for a unit change in dvisvgm-1.5.3 was implemented.
+The path arc(pair B, pair A, pair C, real r) function was fixed.
+The handling of the boolean condition in parametric surfaces was fixed.
+The default meshlight was changed to nolight so that mesh lines with
+positive width appear consistent with the default mesh lines.
+A nonsquare image dimension error was fixed. The definition of the
+SimpleHead arrowhead was fixed. The zoom/menu button and play option were
+fixed. An intersect(path, surface) function was implemented.
+A smoothcontour3 module written by Charles Staats and leminiscate example
+were added. The inline asymptote.sty option now works with xelatex.
+An obsolete workaround for an Adobe Reader transparency artifact
+was removed. An asylatexdir option was added to support the pdflatex
+-output-directory option. An aligndir option for aligning the picture to
+an arbitrary point of the page boundary was added. The garbage collector was
+updated to gc-7.4.2. The documentation was updated.
+
+Release Notes for Version 2.32
+
+The libc++ stringstream workaround was also enabled for FreeBSD.
+The segment(bool[] b) function was fixed. The side(pair,pair,pair) function
+was renamed to orient(pair,pair,pair) and an error in its documentation was
+corrected. New functions orient(triple,triple,triple,triple) and
+insphere(triple,triple,triple,triple,triple) were implemented. A random
+number generator incompatibility on some platforms was fixed. Support was
+removed for the obsolete utility texi2dvi4a2ps. Compiler warnings were
+suppressed.
+
+Release Notes for Version 2.31
+
+Hangs in 3D font generation and also in the "none" tex engine were fixed.
+
+Release Notes for Version 2.30
+
+Compilation issues were addressed. A workaround for the broken stringstream
+container in MacOS 10.9 libc++ was implemented. The OpenGL zoom/menu button
+was fixed.
+
+Release Notes for Version 2.29
+
+The TeX bidirectional pipe was overhauled to support the context tex engine
+again. The luatex and lualatex tex engines were enabled. The inline option
+used by the asymptote.sty LaTeX package and the inlineimage option used for
+generating external PRC files were fixed. Portability issues were addressed.
+
+Release Notes for Version 2.28
+
+A locale bug that interfered with the 3D PRC camera transformation was fixed.
+Minimum OpenGL window constraints were removed in favour of the viewportsize
+variable. The transform(u,v,O) function, which projects onto the plane
+spanned by u and v through point O, was fixed. Numerical overflow issues in
+quadraticroots and cubicroots were fixed. The documentation was updated.
+
+Release Notes for Version 2.27
+
+Move Adobe transparency workaround to C++ code to allow use of texpreamble
+again with the pdflatex tex engine.
+
+Release Notes for Version 2.26
+
+The xasy graphical user interface now terminates the asy process on exit.
+The xasy code editor under MSWindows was fixed; the default code editor is
+now winpad. Degenerate HookHead and SimpleHead arrows were fixed.
+Portability issues were addressed.
+
+Release Notes for Version 2.25
+
+A superfluous play button in rendered 3D images embedded by recent versions of
+media9 is now suppressed. The contour.asy module was reverted to a previous
+stable linearized version. A numerical precision issue in makepen was fixed.
+A routine for drawing braces was added. Deep recursion is now avoided in
+guide flattening. A workaround for an Adobe Reader transparency artifact
+was implemented for the pdflatex and xelatex tex engines. Raw PRC output
+can now be generated with the "-f prc" command-line option. Vector patches
+are now sorted to work around opacity artifacts in many rendering engines.
+The xasy code editor now accepts command-line options. Under MSWindows,
+the ghostscript library is searched for in both the 32 bit and 64 bit
+registries. The FAQ and documentation were updated.
+
+Release Notes for Version 2.24
+
+A segmentation fault in drawSphere was fixed. Recursive calls to simpson
+are now supported. The explicit libglapi dependency was removed.
+A latexmkrc example file that shows how to store figures in a subdirectory
+is now included.
+
+Release Notes for Version 2.23
+
+Compilation without the FFTW library is now supported again.
+
+Release Notes for Version 2.22
+
+Self-defined unary operators are now allowed. Formatted strings instead of
+real values are compared in OmitFormat. The segment(bool[]) function was
+rewritten to use the more efficient segmentlimits(bool[]) call.
+Unnecessary buffering of surface and path3 data was removed.
+Portability tweaks were made. References to out-of-date trembling
+examples were removed. Vertex-colored triangles now work again in Adobe XI.
+The transformation of normal vectors was fixed. PostScript extend
+qualifiers were added for axial and radial shading. The TEXMFMAN
+environment variable is now used to find the TeXLive sysdir.
+
+Release Notes for Version 2.21
+
+Explicitly transformed billboard labels now work correctly again.
+The alignment point of OpenGL billboard labels was fixed. An extend
+parameter was added to the axes (default true) and axes3 (default false)
+routines. A history recall bug was fixed. A typo was corrected in the
+documentation of the Jacobi elliptic functions sncndn.
+
+Release Notes for Version 2.20
+
+A work around was implemented for a dvipdfmx bug that prevents the
+xelatex tex engine from properly embedding PRC objects. Billboard rotation
+is now disabled for explicitly transformed labels.
+
+Release Notes for Version 2.19
+
+Numerical resolution issues with the PRC camera orientation and viewportshift
+were fixed. The lighting of NURBS surfaces was fixed. The special 8192
+strlen NSIS build was now correctly reinstated, with stubs, to prevent the
+installer from overwriting Windows PATH environment variables > 1023 bytes.
+
+Release Notes for Version 2.18
+
+A compilation issue on MacOSX was addressed. Secondary axes pictures now
+inherit the size of the primary picture, so that the markthin marker works
+properly. The special 8192 strlen NSIS build was reinstated to prevent the
+installer from overwriting extremely long Windows PATH environment variables.
+
+Release Notes for Version 2.17
+
+A bug with non-square pen function images was fixed. Autoscaled
+logarithmic axes were fixed. Offscreen and non-offscreen rendering are now
+supported in a single binary (requiring OSMesa version 8), with
+settings.offscreen defaulting to false. The media9 LaTeX style file is now
+used to embed 3D PRC content instead of movie15. Local 3D coordinates are
+now used. PRC Part names are nolonger generated by default. A bug in
+bezulate was fixed. A settings.axes3 flag was added to control the
+visibility of PRC axes. An efficient 3D routine for drawing many
+triangles, with specified vertices and optional normals or vertex colors,
+was implemented.
+
+Release Notes for Version 2.16
+
+Ticks are no longer autoscaled when the number of major intervals is
+specified and autoscale is false. Manual tick scaling was fixed. A bug in
+the palette range was fixed. A division by zero in constructing curved arrows
+was fixed. A numerical underflow was fixed. A picture bound error was
+fixed. The current value of currentpen is now always respected in default
+arguments. A default viewportwidth is no longer imposed for attached
+images. A routine for computing camera positions was added. The format
+command is now more consistent with C++ printf formatting. Named arguments
+can now appear in function calls after rest arguments. The wheel example
+was improved to support PDF animations. The erase command no longer resets
+the machine state. Pipes are now used for xasy communication. A new mode
+parameter to input and output replaces xinput, xoutput, binput, and
+boutput. The icon directory path for 64-bit MSWindows systems was fixed.
+Compilation of native CYGWIN binaries is now supported.
+
+Release Notes for Version 2.15
+
+A compilation problem under MacOS X was fixed.
+
+Release Notes for Version 2.14
+
+Minor problems in the geometry module were fixed. Billboard interaction is
+now disabled for offscreen rendering. A markthin(path) marker with opacity
+thinning was implemented. A locale string was added to format(string,int).
+The copy, map, and sequence functions were generalized to arbitrary depths.
+Asymptote can now be compiled as a shared library. A tuple operator was
+added. The draw(revolution) function now defers drawing until the final
+camera position is known. Nonrendered preview images can now be generated
+for fitted pictures. String reads from binary files were fixed. An int
+ascii(string) function and a bool isnan(real) function were implemented.
+Jacobi elliptic functions were implemented. A quick reference card was added.
+Compilation and static initialization issues under MacOS X Lion were addressed.
+
+Release Notes for Version 2.13
+
+Compilation and installation issues were addressed.
+
+Release Notes for Version 2.12
+
+Minor compilation issues were addressed.
+
+Release Notes for Version 2.11
+
+A new offscreen (software) 3D rendering option supports rendering on
+machines that are remote or lack a working video graphics card.
+Shifted pens now work correctly. The handling of whitespace in word mode
+file reads was fixed. A transpose argument was added to the pen function image
+facility, for consistency with the other image functions. The limit
+calculation of parabola and hyperbola was fixed in the geometry module.
+
+Release Notes for Version 2.10
+
+PRC vertex-shading for straight patches was implemented. A general image
+routine that uses a pen function of two integer parameters was implemented.
+A 3D pixel routine was added. A temporary expression is now used to avoid
+side effects in self operators. Keyword-only function arguments were
+implemented. The sizing routines were recoded. Bugs in drawline and
+geometry were fixed. The geometry module no longer overloads the built-in
+circle and ellipse functions. PDF TeX engines are now supported in xasy.
+Directory prefixes are no longer stripped from .js and .prc file names.
+The TeXShop instructions were updated. The asymptote.sty LaTeX style file
+was updated to allow leading spaces before \end{asy} and to introduce a
+keepAspect keyval option. Segmentation faults were fixed.
+Unwanted state-dependency was removed from the startTrembling function of
+the contributed trembling module by introducing a tremble structure
+(backwards incompatible change); see the example floatingdisk.asy.
+
+Release Notes for Version 2.08
+
+Legend markers now work again.
+
+Release Notes for Version 2.07
+
+The -P option required by ghostscript 9.00 was added. The limits command
+now works correctly with reversed axes. The asyinclude command of
+asymptote.sty was improved so that asy source files do not need to be sent
+to publishers; the asy extension is now optional. A mktemp function was
+implemented. Further MSWindows installer problems were addressed.
+
+Release Notes for Version 2.06
+
+Compilation problems and build issues were fixed.
+
+Release Notes for Version 2.05
+
+Arbitrary depth array constructors were re-instated. Profiling code was
+added. Spaces within file names and eps file attachments are now supported
+in inlinetex mode, and interference from any pre-existing aux file is
+avoided. A new auto-generated version (1.21) of asymptote.sty contributed
+by Will Robertson features a latexmk-compatible asyinclude command.
+Path-overwriting bugs in the NSIS MSWindows installer were circumvented.
+
+Release Notes for Version 2.04
+
+Subdivision cracks in transparent labels are no longer filled.
+Warning messages from the FP package are suppressed. MSDOS line terminators
+are now handled; DOSendl and DOSnewl line terminators were added.
+Files generated in inlinetex mode can now be renamed without editing their
+contents (using asymptote.sty version 1.19). The man page was fixed.
+The documentation of render.merge was fixed.
+
+Release Notes for Version 2.03
+
+An optional asydir parameter that allows asy files to be generated in a
+subdirectory was added to version 1.18 of asymptote.sty; XeLaTeX support was
+fixed. Nonrendered preview images via render=0 are now implemented.
+Blank 3D labels were fixed. Problems with arc directions and ellipses in
+the geometry module were fixed. The definition of the Dotted linetype was
+improved. Missing pen and margin parameters were added to the blockconnector
+function calls. Virtual methods were optimized. Makefile dependencies were
+fixed and autogenerated files are cleaned up. The dependence of the source
+tarball on perl was removed. Minor improvements were made to the
+documentation and man page. The Asymptote installation directory is now
+automatically added to the MSWindows path.
+
+Release Notes for Version 2.02
+
+A global latexusage.asy file is no longer generated, in favour of
+individual latexusage-*.asy files (this is a backwards incompatible
+change). Global and local values can now be given for both the inline and
+attach asymptote.sty (version 1.15) options. Underscores were removed from
+the .pre and .tex file names in inlinetex mode. Latexmk support was added
+for compiling individually only those figures that have changed; this
+requires that the inline option be used for 3D figures.
+The asy() function was fixed. A multiple fraction bar bug in texpath was
+fixed. Warning messages and portability issues were addressed. A frame
+label alignment problem was fixed. PDF animations are now supported with
+the XeLaTeX TeX engine.
+
+Release Notes for Version 2.01
+
+The normal vector for perspective projections was fixed. Individual
+processing of each figure within a LaTeX document is now supported.
+The fontsize package uses type1cm.sty again since fix-cm.sty does not
+appear to work as advertised. Uninitialized item bits are cleared.
+Extended for statements now support the var type. PenMargin is used in
+drawing a binarytree. Minor optimizations were made.
+
+Release Notes for Version 2.00
+
+The construction of 3D TeX labels was sped up greatly. Plain TeX page
+numbers were suppressed. Dotted 3D lines and 3D sizing problems were fixed.
+A general search function for sorted structures was implemented; the
+lexorder functions in math.asy now return strict partial orders. Additional
+GSL functions were added. The correct PRC units (PostScript pt units,
+properly called bp) are now displayed in Adobe Reader.
+
+Release Notes for Version 1.99
+
+A segmentation fault was fixed. Perspective animations were fixed. A bug in
+the bezulate topological sorting algorithm was fixed. A framedelay setting
+was added for working around OpenGL animation rendering buffer overruns.
+Further optimizations were made. A portability issue was addressed.
+
+Release Notes for Version 1.98
+
+Memory usage and garbage collection were greatly improved, and many
+optimizations were made. Labels are now aligned using the rotational instead of
+the shiftless part of the transform. A portable CYGWIN memory limit fix was
+implemented. Noncyclic stokepaths are discarded to work around a bug in gs 8.71.
+
+Release Notes for Version 1.97
+
+A new render.labelfill option (enabled by default) fills subdivision cracks in
+unlighted labels. The dependence on gcc-4.3 was removed. Offscreen detection and
+zoom bugs in the OpenGL renderer were fixed. Three-dimensional grouping was
+improved. The symbol table was replaced with a custom hash table. Portability
+updates were made. The Cygwin memory limit fix for MSWindows now works even on
+systems that lack a complete Cygwin installation. The examples were updated to
+exploit the new PRC rendering options.
+
+Release Notes for Version 1.96
+
+The viewpoint function and some examples were updated.
+
+Release Notes for Version 1.95
+
+The PRC driver has been overhauled to support model tree groups, lossy
+compression, efficient representations of elementary geometrical objects,
+and specialized rendering options. More efficient OpenGL thick tubes were
+implemented; the capping of 3D curves was improved. The SIGQUIT signal was
+replaced by SIGTERM. Under MSWindows, the 384MB Cygwin memory limit is now
+automatically disabled by the Asymptote installer. Inferred variable types
+were added and operator symbols are now pretranslated.
+
+Release Notes for Version 1.94
+
+Workarounds for MSWindows registry problems and obsolete runtime libraries
+were implemented. The SimpleHead arrowhead was fixed. Additional matrix
+routines and casts were implemented. The pair dir(path, path) routine now
+returns a unit vector. Variable conflicts coming from the contour module
+were addressed. A RadialShadeDraw filltype was implemented. A guide bug was
+fixed. Redundant mismatched version warnings are avoided. Support for
+fitting one 3D picture within another was added. The documentation was updated.
+
+Release Notes for Version 1.93
+
+Portability issues were addressed. Latticeshading bounds and behaviour
+under svgemulation were fixed. The initial SVG pen was fixed.
+A parallelogram block was added to the flowchart module.
+Temporary files are cleaned up even after TeX errors. The GUI export
+function was fixed; an SVG export option was added. The XeLaTex bounding
+box was fixed. Spaces in output directory names are now allowed for
+supporting drivers. One can cd to other directories, preserving the output
+directory. All output files are written to the directory part of
+settings.outname; if this is empty, the current directory is used.
+
+Release Notes for Version 1.92
+
+Labels work correctly with oblique projections. Transformed Label
+alignment and pt scalings were fixed. Latticeshading is now properly clipped.
+The normal and true Circle calculations were fixed. The interface to the
+simpson integrator and an array index in contour.asy were fixed. In the
+flowchart module, the implicit cast from a pair to a virtual node was
+removed in favour of a block constructor. The ode integration routines now
+return a structure that includes the sampled time values; dynamic
+timestepping was implemented for solveBVP. New predefined tick modifiers
+were added. The CLZ and CTZ bit functions were implemented. PRC part names
+were fixed. The GL library is now explicitly linked. Memory usage was
+improved by configuring the garbage collector with --enable-large-config.
+Null 3D paths are ignored. Non-pdf output is supported for PDF tex engines.
+Portability changes for CYGWIN 1.7 were made.
+
+Release Notes for Version 1.91
+
+The precision of the 3D perspective sizing routines were improved. The
+offset in transformed 3D labels with render=0 was fixed. 3D planar
+arrowhead gaps were fixed; a duplicate 3D arrow angle factor was removed.
+Pen width contributions to the box and ellipse envelopes were fixed. A more
+robust contour algorithm based on paraboloid approximation was implemented.
+A polargraph routine for arrays was implemented. Default font problems were
+fixed. The pdfborder={0 0 0} option was added to settings.hyperrefOptions;
+the hypersetup command is now used to avoid hyperref option clashes. The
+size of pngalpha images was fixed; the pngalpha driver is used only if
+antialias=2. The -alpha Off default convert option was removed in favour of
+convertOptions="-alpha Off". Inlinetex support for xelatex was updated.
+Picture transformations are now respected by latticeshade. The Bessel
+functions J and Y were renamed to Jn and Yn. An operator --(block, block)
+was implemented to simplify the flowchart syntax. The expression % expands
+to the last result returned at the interactive prompt. The GLU-1.3 library
+included in the MSWindows distribution was fixed.
+
+Release Notes for Version 1.90
+
+SVG axial, radial, and emulated tensor-patch shading were fixed; the
+dependency on dvisvgm-0.8.7 was documented.
+
+Release Notes for Version 1.89
+
+The draw, fill, and clip commands now pass raw SVG code directly to dvisvgm
+(version 0.8.6 required); zero-length paths are output as circles.
+Unsupported SVG elements are converted to PNG images; unimplemented SVG
+features such as Gouraud and tensor-patch shading can be (partially)
+emulated as vector elements using the -svgemulation option.
+The control point normalization of rational NURBS surfaces was fixed;
+3D NURBS curves are now implemented. A problem with inlinemovie3 was fixed.
+The linetype pattern is now a real array: for backwards compatibility, a
+string is still accepted, but the return type of linetype(pen) is now
+real[] instead of string (backwards incompatible). The split routine was
+changed so that an empty delimiter splits on spaces, discarding duplicates.
+The palette routines are now guaranteed to generate at least the
+specified number of colours. PNG output produces a transparent background.
+Surface and path3 garbage collection was fixed.
+
+Release Notes for Version 1.88
+
+Compilation without OpenGL was fixed. PRC billboard labels were
+implemented; settings.billboard was renamed to settings.autobillboard
+and by default enabled for all 3D labels. The surface constructor for
+embedding labels on surfaces now draws both the top and bottom faces by
+default. The meshpen, knot, weight, and color arrays are now properly cached.
+The example fequlogo.asy illustrates how to draw an arbitrary 3D background
+plane. The intermediate dvi file is now removed when producing SVG output.
+Improvements were made to the tutorial.
+
+Release Notes for Version 1.87
+
+Support for SVG output was added (requires dvisvgm-0.8.4). Billboard
+labels were implemented for the OpenGL renderer. OpenGL animations were
+improved: reverse and step menu items were added, along with a framerate
+setting. An addStereoViews function and example stereoscopic.asy were added.
+The addViews function was generalized to handle any layout; the default
+layout was changed from ThreeViewsFR to SixViewsUS. PRC node names are
+now implemented for curves, surface, labels, and dots. OmitTick was
+generalized to omit both major and minor ticks. A graphicx.tex workaround
+was implemented to parse paths properly. A viewportsize bug was fixed.
+A memory deallocation bug was fixed. The ENDIAN test was fixed. The ucyclic
+and vcyclic parameters are no longer set for conditional surfaces. The
+erase() function clears the PostScript canvas again. A projection()
+function that returns the interactive camera parameters was implemented.
+A hyperrefOptions setting was implemented. The tutorial was improved.
+
+Release Notes for Version 1.86
+
+PRC polygons were optimized. Surface memory usage was reduced.
+The automatic sizing of NURBS surfaces was fixed. A bug in the radius of
+curvature computation at nodes was fixed. The configuration test for the
+GNU readline library was improved. The naming of PRC parts was implemented.
+
+Release Notes for Version 1.85
+
+Compilation is now supported again on platforms lacking OpenGL.
+Missing pen dimensions were added to a 3D picture sizing routine.
+The labelsurface routine was renamed to surface and extended to surfaces
+containing a single patch.
+
+Release Notes for Version 1.84
+
+The perspective PRC viewportmargin was fixed. Unwanted spaces were removed
+from (version 1.10 of) asymptote.sty. Support for drawing PRC and OpenGL
+NURBS surfaces was added. Obsolete code, including an unwanted inline
+qualifier, was removed. A split structure that can be adapted for splitting
+intersecting patches was added, along with the example splitpatch.asy.
+
+Release Notes for Version 1.83
+
+OpenGL animations, illustrated in glmovie.asy, were implemented.
+Viewportshift flicker was fixed. An empirical translation between
+OpenGL and PRC shininess was implemented. Splined parametric surfaces are
+now used to implement smooth thick lines and tubes. The projected bounding box
+calculation and angle calculations were fixed. A labelsurface function was
+added. The Headlamp light is now the default light; a light argument was
+added to shipout. Patches are now constructed with the usual orientation
+for a counterclockwise external path; the convention for tensor product
+shading was updated. Picture environments for TeX clipping are no longer
+nested. A texpath initialization bug was fixed. An ASYMPTOTE_HOME
+environment variable was added. Viewing was fixed for file names
+containing spaces. A picture sizing bug was fixed. An example of an inset
+graph was added. Type information for variables is now returned at the
+interactive prompt. Warning message suppression was improved; warnings in
+Asymptote code can now be disabled. The cyclic member of an array is now
+writeable; the obsolete cyclicflag and void cyclic(bool) functions were
+removed. File mode functions are now virtual members; this backwards
+incompatibility requires that line(file f) be changed to f.line(), etc.
+
+Release Notes for Version 1.82
+
+Threaded exports were fixed. The texpath fontsize was fixed for PDF tex engines.
+A default currentprojection argument was added to transform3(projection).
+The -gray and -bw settings are now respected in PRC output.
+A consistent approximation is now used for drawing tube centers.
+Missing pt units were added to all fontsize examples.
+
+Release Notes for Version 1.81
+
+A boolean targetsize option can now be used to draw 3D labels with the apparent
+size they would have on the target plane. The camera adjustment algorithms
+were fixed; the autoadjust flag is respected. Missing path3 functions
+such as endpoint(path3) were added. The doubleclick timeout under MSWindows
+was fixed. A workaround for a ConTeXT small font bug is illustrated in
+contextfonts.asy. File associations are now used under MSWindows for
+psviewer, pdfviewer, display, and animate. Single quotation marks are now
+allowed in filenames. Deconstruction is now only supported in PNG format;
+the xformat setting was removed. The example lmfit illustrates
+Levenberg-Marquardt nonlinear least-squares fitting.
+
+Release Notes for Version 1.80
+
+The interface for changing the precision for XDR/binary files was
+simplified; file parameters can now be queried as virtual members.
+The zoom/menu action was improved to emulate a double-click and assigned again
+to the right mouse button; a left-button binding bug was fixed.
+New settings zoomfactor, zoomstep, spinstep, arcballradius, resizestep, and
+doubleclick were added. The OpenGL thread is now exited gracefully; idle
+state and other parameters are properly reset on quitting. Lighting is now
+initialized only in home(). Animations with global=false were fixed.
+An improved (and free) psview PostScript viewer is now suggested for MSDOS
+users. A mechanism for disabling annoying warnings like "writeoverloaded"
+was implemented. The documentation directory under TeXLive was fixed.
+
+Release Notes for Version 1.79
+
+The perp vector calculation in the solids module was fixed. A bug in the
+mouse motion functions was fixed. A pan action (which differs from shift
+due to perspective distortion) was added to the OpenGl renderer;
+the Camera (c) menu item now outputs all camera settings. The default right
+mouse button mouse binding was changed from "zoom/menu" to "zoom".
+User-initiated exports no longer cause the renderer to quit.
+Dynamic time stepping was fixed in the ode module; the "integrate"
+routines now return the array of computed values. Operators == and != were
+added for all built-in arithmetic 2D arrays; a segmentation fault was
+fixed. The etc/fstab kludge for Cygwin 1.7 was removed. The configuration
+directory under TeXLive is now $TEXMFCONFIG/asymptote.
+
+Release Notes for Version 1.78
+
+Thread locking issues were fixed. The linegranularity is now respected when
+drawing thick curved lines. A bug in FSAL ODE integrators when using a
+fixed time step was fixed. Missing miterlimit defaults were added.
+Xasy was updated to use Python 2.6.2 and Imaging-1.1.7b1 (which requires no
+alpha support patches). Obsolete patches were removed. More TeXLive build
+issues were addressed: the install-prebuilt target omits texhash and does
+not attempt to install PNG files for asymptote.info. A configuration
+problem with --disable-gc was fixed. The 3D mouse bindings are now
+customizable. Support was added for generating syntax highlighting for the KDE
+editor Kate.
+
+Release Notes for Version 1.77
+
+Splined parametric surfaces were implemented; a bug in the Cartesian
+splined surface routines was fixed. An ode module for solving ordinary
+differential equations was added. A bug in maxtimes and mintimes was fixed.
+A Levenberg-Marquardt nonlinear fitting routine was added. The format
+command now returns TeX compatible output only in math mode. A path3 label
+alignment problem was fixed. The MSWindows support for TeXLive 2009 was fixed.
+
+Release Notes for Version 1.76
+
+A bezulate bug was fixed. The resolution and caching of texpath were
+improved; for PDF tex engines, the basealign pen attribute is now
+respected. Support for OCG layers was added. Lights Headlamp and White were
+implemented; the predefined adobe light was removed. Holes are now handled
+in superpath-to-surface constructor when planar=true. A degenerate
+transform3 issue was fixed. The alignment of rendered and PRC images was
+improved; the angle for rendering absolute projections was fixed. Inaccurate
+TeX and ConTeXt font scalings were fixed. A texsize(string, pen=currentpen)
+function returns the raw TeX dimensions {width,height,depth}. A new version
+of asymptote.sty (1.07) fixes attach=true mode.
+
+Release Notes for Version 1.75
+
+Issues with 3D labels and texpath, both in inlinetex mode and with the
+ConTeXt TeX engine, were resolved. A bug in bezulate was fixed. A partial
+workaround was added for the unimplememented -output-directory ConTeXt
+option (the current directory must still be writeable). The aspect ratio
+and viewportmargin calculation in module three was improved, with tighter
+3D bounds. A bug in the intersections(path3, surface) routine was fixed.
+
+Release Notes for Version 1.74
+
+An error in the surface bounding box routines was fixed. Path/surface
+intersection routines were added. PDF tex engines are now supported for
+3D labels and texpath. The new ConTeXT tex engine can be used for both 2D
+and non-PRC 3D drawings. Projections LeftView, RightView, FrontView,
+BackView, BottomView, and TopView, along with an addViews function, were
+implemented. Portability fixes and various updates to support TeXLive
+builds were made. The dependence on currentprojection in label(Label,
+path3) was removed. The font command for LaTeX tex engines now requires all
+four NFSS (encoding, family, series, shape) arguments.
+
+Release Notes for Version 1.73
+
+An alternative OpenGL background color can now be specified with the pen
+currentlight.background. A new textpath command allows 3D labels to be
+drawn with settings.texengine="none". Minor bugs in the geometry package were
+fixed. The interface to the vectorfield routines was improved.
+The autoadjust parameter was removed from orthographic projections;
+autoadjust=false is now always respected for perspective projections.
+Optional warn=true arguments were added to the polar, azimuth, colatitude,
+and latitude functions. A call to reportError interrupts execution again.
+A segmentation fault that can occur after file mode errors was fixed.
+
+Release Notes for Version 1.72
+
+PostScript calculator function shading was implemented. Interactive camera
+parameters of the native OpenGL renderer can now be queried.
+The effective camera positions for oblique projections was fixed.
+Philippe Ivaldi's geometry_dev module was merged into geometry.asy;
+trembling_pi was added as trembling.asy. The GSL module was expanded.
+An extrude routine for labels was implemented. Rotated path
+label alignments were fixed. The alignment of 3D axis labels was fixed.
+The basealign pen now always typesets "ace" and "acg" at the same location.
+Arrow endpoint detection was fixed. A sysdir setting was added, along
+with an --enable-tetex-build configure option. The store argument of
+saveline is respected again. Left-justified trailingzero alignment was
+fixed; a signedtrailingzero specifier was added. Boolean conditions on
+linearly interpolated surfaces now suppress function evaluation.
+The adaptive algorithm used for rendering thick lines and tubes was
+improved. An ambiguity in the flowchart module was fixed.
+A patch is included to work around an MSWindows XP problem with 3Dgetview
+in the 2009/03/23 version of movie15.sty. A problem with spurious menu
+interaction zooming was fixed. The asy.bat MSWindows batch file now
+respects all command-line arguments.
+
+Release Notes for Version 1.70
+
+A labelpath3 module for typesetting curved labels in 3D, contributed by Jens
+Schwaiger, was added. PenMargin2 was defined for use with planar arrowhead
+types like DefaultHead2. A center=false parameter was added to projections
+to allow one to automatically center the target within the bounding volume.
+The ambiguity in the surface function was resolved. Problems with spaces in
+filenames were fixed.
+
+Release Notes for Version 1.69
+
+Internal patch degeneracies were removed by splitting. Bugs in the
+windingnumber and the intersection routines were fixed. The inside(path)
+routine was improved; a fillrule argument was added. The bezulate connect
+routine was improved. Bezulate is now automatically applied to path arrays:
+surfaces should be constructed directly, without first calling bezulate.
+A workaround for recent changes in the hyperref package was implemented.
+The divisor setting was replaced with purge(divisor=0). The calls to baseline
+in graph.asy were fixed. A miterlimit attribute was added to pens.
+Animation problems were fixed. Lighting problems with multiple exports and
+a quit deadlock were fixed. A new version of asymptote.sty (1.06) fixes
+an undefined \ASYbox.
+
+Release Notes for Version 1.68
+
+Support for 3D inline pdf movies was added. Camera adjustment was fixed;
+the filesurface.asy example illustrates automated camera and target
+computation. A deadlock in the export loop was fixed. A new version of
+asymptote.sty (1.05) fixes the definition of \ASYanimategraphics.
+The handling of intersection fuzz was improved. The baseline routine was
+generalized. New paragraphs are now allowed in minipage labels.
+Some minor errors in the documentation were fixed.
+
+Release Notes for Version 1.67
+
+Spurious annotation question marks in 3D PDF attachments were fixed;
+attached images are now printable. The asy environment defined in the new
+(1.04) version of asymptote.sty supports keyval options width, height,
+viewportwidth, viewportheight, and attach; the obsolete asyattach
+environment was removed. The default viewportwidth is the linewidth in
+inline mode and 0 in attached mode. Planar projected arrows were fixed.
+Automatic camera adjustment was improved. A minimum viewportsize can now be
+specified. The control points for cyclic segments produced by texpath were
+fixed. Overlap issues in planar surface patches were fixed. Surface
+constructors were simplified: the routine planar has been replaced by
+surface(path3) and in most cases there is no need to call bezulate directly.
+An Align constant was added. The parameter limits used in buildcycle were
+fixed. The intersection routines now respect the fuzz parameter.
+Segmentation faults involving null cyclic guides were fixed.
+Subpath now preserves the straight flag. Pictures containing graphs
+now transform correctly; unextended axes limits and tick selection were
+improved. Axial and radial shading respect now respect -gray. The animation
+prefix was fixed. An example of drawing a surface from irregular data was
+added. A work around was implemented for an intermittent hang on exit in
+the 3D native renderer. An auto3D option was added for controlling the
+poster option. The 2008/10/08 version of movie15.sty is now compulsory.
+The cd %USERPROFILE% command was removed from asy.bat.
+
+Release Notes for Version 1.66
+
+An alignment problem with the pdflatex tex engine was fixed.
+Problems in the animations module were fixed, including a broken
+ImageMagick layers optimization. Optional direction arguments
+were added for three-dimensional bars. The appearance and alignment of the
+planar arrowheads DefaultHead2, HookHead2, and TeXHead2 was improved; they
+now accept an optional normal argument and respect the filltype.
+A transverse/longitudinal confusion was fixed in the solids module.
+The camera adjustment routine was improved and is now controlled by the
+autoadjust=true option for perspective projections; the user is notified
+when the camera is moved. The obsolete featpost3D.asy module was
+removed. Midpoint interpolation was reinstated for drawing contours.
+The Asymptote license was upgraded to the GNU Lesser General Public License.
+
+Release Notes for Version 1.65
+
+The xelatex tex engine was implemented. Bugs in pdflatex output and the
+xelatex alignment were fixed.
+
+Release Notes for Version 1.64
+
+Support was added for XeLaTeX PDF specials. The target point is not forced
+to be part of the control volume for absolute projections. The directory is
+now stripped from the animation prefix; generated PDF animations are no longer
+automatically deleted. New parameters xsize and ysize of the asyinclude
+function of the slide module are illustrated in interactive 3D examples in
+intro.asy. A Protein Data Bank example was added to illustrate the
+generation of predefined views. The slidedemo example was fixed.
+The license of the PRC code and tools was upgraded from GPL to LGPL.
+
+Release Notes for Version 1.63
+
+Support was added for XeLaTeX (which requires a modified version of
+movie15.sty; note however that PDF specials are not yet implemented in
+dvipdfmx). The 2D contour routines were generalized to handle nonuiform
+lattices; interpolation artifacts are now avoided when the midpoint
+function values are unknown. The ncell parameter for 3D contours was
+replaced by nmesh. The complex gamma function was implemented. Interactive
+rendering of preview images is now properly synchronized. The bounding
+volume is now automatically expanded to include the target position.
+An interactive 3D surface of revolution example was added to slidedemo;
+rendered images are now automatically included when fitting non-PRC
+pictures. Duplicate beginclip/endclip functions in pstoedit.asy were
+removed and the pstoedit-3.45 patch was updated to fix compilation errors.
+Errors on EOF after reading 0 values are no longer reported. One-column
+legends are now handled correctly. Old-style constructors were replaced
+with operator init. An electromagnetic spectrum example was added.
+
+Release Notes for Version 1.62
+
+Outputting PDF format to other directories was fixed. An int hex(string)
+function that casts a hexadecimal string to an integer and a
+pen rgb(string) routine that returns a pen corresponding to a given
+6-character RGB hexadecimal string were added. In the dot routines, Label
+arguments were added and minor bugs were fixed. A parametric version of
+markuniform was added.
+
+Release Notes for Version 1.61
+
+A workaround was implemented for a dvips misconfiguration in TeXlive 2008
+that introduces unwanted %%BeginPaperSize commands into the EPS output.
+The -q option was reinstated; the asymptote.py Python module was fixed.
+The bezulate.asy module now enforces the same zerowinding fillrule as used by
+dvips. In solids.asy, a warning is issued if the silhouette routine is used
+in a fully 3d context. The freeglut extensions to support user-specified
+multisampling values were re-instated. A freeglut segmentation fault
+triggered by spurious window creation in the export loop was fixed. An
+aspect ratio problem was fixed. A string[] to int[] ecast was added. A
+Pentype function was added. The asydir() function was fixed under MSDOS.
+
+Release Notes for Version 1.60
+
+An optional bool3 condition was added to the graph functions, allowing one
+to skip points or segment a graph into distinct branches, based on a
+user-supplied test (see the example gamma.asy). A gettriple routine was
+added. The interp function first promotes its pen arguments to the highest
+colorspace. Export exceptions are now caught gracefully. Under UNIX,
+xasy can now be run from a write-protected directory again. A work around
+was implemented for the inability of the movie15.sty package to handle
+spaces in filenames. Stack overflow diagnostics were improved. A read from
+pipe failure under MSDOS was fixed.
+
+Release Notes for Version 1.59
+
+A missing filltype option for projected 2D arrowheads was added.
+The scaling of plain TeX fonts was fixed. Examples that mix 3D exporting and
+viewing now work properly. With the -nothreads option, the main process
+now waits for 3D exports to finish before proceeding. Conflicts in slide
+presentations were fixed; the asy(string) function assigns defaultfilename
+correctly. A bug in processing command-line options was fixed.
+
+Release Notes for Version 1.58
+
+Two-dimensional arrowheads are now drawn automatically for 2D projections.
+ArcArrow3 routines were added. Standard pen arithmetic is now used in all
+colorspaces, so that interp(pen,pen,real) and Gradient(pen[] p) now work as
+expected. A Wheel palette was added and is used in the example gamma3 to
+indicate the phase of the complex Gamma function. A silhouette routine for
+solids of revolution is illustrated in the examples spheresilhouette.asy
+and hyperboloidsilhouette.asy. Problems with 3D axis label alignments were
+fixed. The example scaledgraph illustrates how to factor out an axis
+scaling. Interactive mode is now exited on EOF, unless exitonEOF=false.
+Support for open function signatures was added. A conflict between
+asymptote.sty and the breqn package was fixed. PNG images for the manual
+are now built in a separate directory so that they don't take precedence
+over PDF files. A problem with xasy under MSDOS was fixed.
+
+Release Notes for Version 1.57
+
+The pdflatex texengine was fixed. The default MSDOS "start-in" directory is
+now %USERPROFILE%, for compatibility with the MSWindows Vista operating
+system. Temporary files are now generated in the directory specified by
+the -outname (-o) command-line option, so that write access to the current
+directory is no longer required. Various font size problems were fixed.
+The axis coverage calculation was improved. An object(Label, envelope, ...)
+constructor was added, along with support for object transformation and
+alignment. Clipping is now allowed across page boundaries;
+beginclip(picture, path[]) and endclip(picture) functions were implemented.
+
+Release Notes for Version 1.56
+
+A bounding box bug in the latex texengine was fixed.
+The font scaling is now rounded to the nearest integer. The wait=true
+argument of shipout was fixed. The documentation of grid3 was fixed;
+examples of using grid3 with scale(true) were added. The handling of the
+asydef environment within Emacs lasy-mode was fixed. An asyinclude function
+for embedding 3D PRC graphs in slides was implemented.
+
+Release Notes for Version 1.55
+
+A serious bug in drawing paths of length 0 that broke the dot(pair)
+routine was fixed. Problems in guide to path and path to guide conversions
+were fixed. A triple invert(pair) routine was added to invert a pair z
+onto the projection plane. The obsolete field of view factor was removed.
+
+Release Notes for Version 1.54
+
+The filltype of three-dimensional labels is now respected when render=0.
+Multiple file batch mode under MSWindows was fixed. The reverse(guide) and
+guide examination routines were fixed. A reverse(guide3) routine was added.
+Curved cyclic paths of size 1 were fixed. Fork is now used by default under
+MSWindows pending stable CYGWIN POSIX thread support; this can be overridden
+with settings.threads=true. The need to remove latexusage_.pre along with
+latexusage-* and latexusage.aux when switching between latex and pdflatex
+usage was documented.
+
+Release Notes for Version 1.53
+
+Forking problems under Windows 2000 were fixed and MS-DOS style path
+warnings were suppressed. Problems with PRC projection sizing and the
+rendering logic were fixed. The toolbar is now enabled by default within
+the asyattach environment. Two-dimensional transforms no longer prevent
+three-dimensional labels from being projected onto the initial viewing
+plane. Out-of-memory errors in the OpenGL renderer are caught again.
+The new tube module was documented and a trefoilknot example was added.
+
+Release Notes for Version 1.52
+
+Support for generating PRC output on bigendian machines was added.
+Multisampling was improved: by updating the freeglut library to svn version
+761, one can now specify an antialiasing pixel width with the parameter
+multisample, which is now an integer. The asymptote.sty and asycolors.sty
+files are now installed by default in $TEXMFLOCAL/tex/latex. The OpenGL
+renderer by default now uses POSIX threads instead of fork. A work around
+for the nonstandardized signature of gluNurbsCallback on various MacOS
+platforms was implemented. Planar vertex shading was fixed. A planar
+argument to surface was added. To work around rendering problems with some
+graphics cards, the window is now hidden only when iconify=true. A tube
+module was added. A setlocale segmentation fault was fixed. Now that we
+require a multithreaded version of the Boehm garbage collector, the
+installation instructions were updated for using the system version. An
+optional user=false argument was added to min(picture), max(picture), and
+size(picture). The dependency of asy-mode.el on the cc-mode.el source file
+was removed.
+
+Release Notes for Version 1.51
+
+A separate multisample setting is used to control screen antialiasing;
+multisampling is now only enabled when viewing. The problem of multiple
+glInit calls is fixed. A more conservative multisampling patch for freeglut
+is supplied. The OpenGL process is now always forked for better
+performance. The last freeglut extension was removed.
+
+Release Notes for Version 1.50
+
+Detection and support for the native glut library on MacOSX now allows
+Asymptote's adaptive OpenGL renderer to be used on all major platforms.
+The OpenGL renderer now supports antialiasing; a race condition and export
+problems were fixed. The new default value of maxtile=(0,0) denotes
+the screen dimensions. Lighting problems due to incorrect normal
+orientations were fixed. The up vector for embedded PRC output was fixed.
+A viewportmargin parameter was added to allow for a larger viewport.
+An iconify setting was added for UNIX systems that support rendering in an
+iconified state. An embed option (default true) was added to allow one to
+suppress the embedding of a rendered preview image. A new version of
+asymptote.sty (1.01) supports file attachments, which provide a better way
+of embedding 3D PRC files in a LaTeX document. The latexusage file prefix
+was renamed from latexusage_ to latexusage-. A numerical precision issue in
+the surface of revolution constructor was fixed. Support for
+three-dimensional dimension bars was added; PenMargin3 and DotMargin3 were
+fixed. The argument put=Above (put=Below) should now be replaced by
+above=true (above=false); this is a backwards incompatible change.
+
+Release Notes for Version 1.49
+
+Issues with surface normals that led to incorrect lighting were fixed.
+By default, the mean(pen[]) routine now returns an interpolated pen with the
+minimum opacity of all given pens. A patch reverse(patch) function was
+added. The settings.keep flag is now handled correctly in texpath and
+strokepath. A cornermean function for surfaces was added. Several
+examples that illustrate patch and vertex shading were updated.
+
+Release Notes for Version 1.48
+
+High-resolution OpenGL tiled rendering was implemented. Support for
+vertex-dependent colors was added. Centering of perspective projections
+was improved. Rendering artifacts in planar surfaces and thick lines were
+fixed. A Gradient palette that varies linearly over a specified range of
+pens was added. An improved surface constructor for convex
+three-dimensional paths was added; the planar constructor should now only
+be used for nonconvex paths. A DefaultHead2(filltype filltype=Fill)
+arrowhead was implemented, along with an optional filltype argument for
+HookHead2. New maxheight, hstretch, and vstretch parameters were added to
+legend(). A boolean user=true argument was added to the point(picture, pair)
+function; the framepoint routine was removed in favour of
+truepoint(picture, pair, user=false). A roundbox envelope routine was
+added. An antialias setting (default true) was added. A bug in xasy and an
+incorrect precontrol bug in write(path) was fixed. Compilation with
+standard glut for systems without freeglut is now supported.
+
+Release Notes for Version 1.47
+
+Support for simple obj files and patch-specific surfacepens and meshpens
+was added. Surface constructors for triangles were added. Three-dimensional
+margins were implemented. Flat 3D arrowhead types HookHead2 and TeXHead2
+were implemented. By default, 3D arrowheads are now always drawn with
+currentlight. A missing angle parameter in HookHead3 was added. Functions
+that construct a pen array from a given function and palette were added, as
+illustrated in the example elevation.asy. A bug in the cyclic path write
+functions was fixed. A strokepath(path g, pen p) function was implemented.
+A missing put argument in grid3 and a missing transform for projected 3D
+mesh lines were fixed. File prefix problems were fixed. Spurious "camera
+too close" errors were fixed. Tighter three-dimensional bounds are generated.
+
+Release Notes for Version 1.46
+
+Support was added for embedding 3D PRC files within LaTeX even when
+settings.render=0. An error is now signalled if the user tries to render an
+image without freeglut library support. The Klein bottle example was
+updated to use lightgray instead of the new default surface color (black).
+The sphere animation example was updated to work with the new skeleton
+structure in the solids module.
+
+Release Notes for Version 1.45
+
+Bugs in the solids of revolution and graph3 modules were fixed;
+longitudinal curves are split into front and back pieces. Min and max
+arguments were added to axes and axes3. Rendering artifacts are now
+avoided. When render=0, 2D and 3D objects are now sized consistently.
+The automatic camera adjustment was improved. Bugs in thick three-dimensional
+lines were fixed; thick lines are now drawn with fewer Bezier patches and
+3D Linetype offsets are supported. The appearance of unitcones and arrows
+was improved. New arrowhead3 types HookHead3 and TeXHead3 were added. The
+default surface color is now black. New surface and path constructors were
+added. Secure options can now be queried as read-only settings.
+
+Release Notes for Version 1.44
+
+Full interactive 3D support has been added to Asymptote, with the option of
+generating and embedding 3D PRC data in PDF files or rendering scenes
+directly with Asymptote's own fast OpenGL-based renderer. The implicit
+casts from 3D to 2D objects were removed (in favour of call explicit calls
+to project). A path[][] texpath(string s) routine was added to convert
+string into the paths that TeX would fill. Add boolean stroke parameter was
+added for shading (and clipping to) stroked paths. The Circle and Arc
+routines were fixed. Autoscaling of graph axes limits is now disabled by
+default. A path3 path3(path p, triple plane(pair)=XYplane) constructor was
+added; the path3 routines were moved to C++ code. Optimized and robust
+versions of the intersection, windingnumber, inside, and surface extrema
+routines were implemented. The lighting routines were replaced by the
+OpenGL model. Each Asymptote process once again uses a separate
+currentpen. A segmentation fault and an incorrect parameter in the
+Delaunay triangulation routine were fixed. This major overhaul of the
+three-dimensional graphics has necessitated a few backwards
+incompatibilities. The most significant change involves filldraw:
+
+filldraw(polygon(5),red);
+
+should be replaced by
+
+draw(surface(polygon(5)),red);
+
+Also, the solids module has been improved so that
+
+revolution a=revolution(O--X+Z,Z);
+a.filldraw(red,blue);
+
+is now more sensibly written as
+
+revolution a=revolution(O--X+Z,Z);
+draw(surface(a),red);
+draw(a,blue);
+
+Release Notes for Version 1.43
+
+A new array(n, value) function returns an array consisting of n copies of
+value. Conditional drawing of surfaces meshes was implemented. Vector
+field support was improved. Graph tick selection without autoscaling
+was improved. By default, all 2D axes are drawn below existing objects.
+An interface for drawing contours on arbitrary nonoverlapping
+meshes was added. Optional support for Jonathan Shewchuk's more robust
+triangulation routines was added. The file precision setting can now be
+queried. A beep() function was added. The partialsum function now returns an
+array of the same length as its argument (backwards incompatible). Dash
+offset and font selection bugs were fixed. Modules to redefine LaTeX named
+fontsizes for 10pt and 11pt article documentclasses were added. Problems
+in asy-mode.el were fixed. A problem with label alignment was fixed.
+The international inch is now used instead of the U.S. survey inch.
+The code now compiles cleanly under gcc-4.3.0.
+
+Release Notes for Version 1.42
+
+A routine was added for projecting a Label onto a given plane;
+an ambiguity in the three-dimensional scale routine was resolved.
+An inside(path p, path q, pen fillrule=currentpen) routine was added to
+determine if one path is strictly within another. Optional arrows were
+added to the slopefield routines. The movie function now generates
+multipage PDF animations when format="pdf" and global=true; a fit argument
+was added to support an optional filled bounding box for each movie frame.
+Casts were added between the hsv structure and pens. Bad casts from TeX
+bidirectional pipe are now caught. In inline latex mode, TeX headers are
+now output only when needed. A bug in the cancellation of text addition in
+xasy was fixed. The sticky bit is no longer set when creating the ~/.asy
+directory. The documentation and FAQ were updated.
+The dot(real[] a, real[] b) routine now returns the dot product of the
+vectors a and b; this introduced a backwards incompatibility:
+dot(x,y) should now be replaced with dot(pairs(x,y)).
+
+Release Notes for Version 1.41
+
+Python-style array slices were added. The array virtual field A.keys
+returns the indices of initialized entries. The concat routine can now
+take an arbitrary number of arguments. The write functions now output
+nothing for uninitialized values instead of producing an error. A bounding
+path is stored in the object structure to allow connections to
+noncardinal boundary points. The buildcycle algorithm was improved.
+The expression dir(E) is a synonym for E. The visibility of unsplit solid
+slices is now properly resolved. A drawpen argument was added to FillDraw.
+The uniform(real a, real b, int n) function returns a uniform partition of
+[a,b] into n subintervals. Complex exp, log, sin, and cos functions were
+added. An interface to the internal adaptive simpson integration routine
+was added. History lines are now stored immediately after input (as well
+at exit, after stifling). Support for the HSV colorspace was added.
+The dependence of non-PDF animations on the animate.sty package was removed by
+renaming animate.asy to animation.asy (PDF animations still need to import
+animate.asy). Transparency groups are now respected by xasy.
+TeX diagnostics were improved. An obsolete function for drawing boxes on
+pictures was removed in favour of draw(Label,box).
+
+Release Notes for Version 1.40
+
+Hatch widths for PDF output were fixed by disabling dynamic line width
+adjustment. A nurb-related bug in solid shading was also fixed.
+
+Release Notes for Version 1.39
+
+In the animate module, a constructor bug was fixed and the temporary
+multipage pdf movie file is deleted by default.
+
+Release Notes for Version 1.38
+
+For perspective projection, nonuniform rational B-splines (NURBS) are now
+approximated by adding additional control points to Bezier curves.
+Inline PDF movies can be generated directly within LaTeX files (requires
+animate package, version 2007/11/30 or later). SimpleHead, HookHead, and
+TeXHead (Computer Modern) arrow styles were added. FillDraw is
+automatically reduced to Draw for noncyclic paths. Empty clipping bounding
+boxes were fixed. The xasy diagnostic Console should now work reliably on
+all platforms. Graph and interpolation array length diagnostics were
+improved. The axes routines now take optional xlabel, ylabel, and zlabel
+arguments defaulting to empty strings. The autoformat axes tick label
+routines now try to add an extra digit of precision. Pen arguments were
+added to the flowchart block routines. A path&cycle operator was added.
+The read1, read2, and read3 routines now affect only the current operation.
+A -c (command) option and exit() command were implemented. Ambiguous
+expressions are now resolved by interactiveWrite (with a warning). A patch
+is included for fixing problems with the Asymptote backend for pstoedit-3.45.
+
+Release Notes for Version 1.37
+
+The speed and useability of the graphical user interface has been greatly
+improved, including full transparency support under MSWindows.
+The intersections routine was fixed, and an optional fuzz parameter was
+added. A bug in the arrow routines was fixed. The 2D graph routines were
+improved when autoscaling is disabled, secondary axis bugs were fixed,
+and the automatic logarithmic axis coverage routine was re-enabled.
+Degenerate 3D reference vectors are now handled and the default 3D
+tick directions were improved. The array returned by intersections is now
+automatically sorted. A patch is applied to avoid out-of-memory
+segmentation faults with gc-7.0. A history(int n=1) function can be used to
+return the interactive history. Automatic semicolons are now added to the
+history. Locale bugs were fixed. A string[] split function was added.
+Installation, uninstallation, and diagnostics under MSWindows were
+improved. A marker dot routine was added. The output(s,update=true)
+function was fixed. Configure now uses a system version of Boehm GC if the
+recommended local version isn't present.
+
+Release Notes for Version 1.36
+
+Recently introduced bugs in the tex(), postscript(), gsave(), and grestore()
+commands were fixed.
+
+Release Notes for Version 1.35
+
+A hang in testing for the intersection of nearly identical paths in
+solids.asy was fixed. The numeric formatting of setdash arguments was fixed.
+
+Release Notes for Version 1.34
+
+An innovative graphical front end to Asymptote (xasy) has been developed.
+Clipping of labels is done within a picture environment to avoid unwanted
+page breaks. The default LaTeX font is now package-dependent. The syntax
+was generalized to allow expressions such as (x). Comments are now
+supported when reading strings in csv mode. Nesting capacity overflows
+in arctime were fixed. The autoscaling of graphs for close minimum and
+maximum values was improved, the default tick format is automatically
+adjusted to make tick labels unique, and a general trailingzero format
+string was added. Improved, robust versions of intersect and
+intersectionpoints were implemented (based on a new routine
+intersections). A permissions bug was fixed. A filltype argument was added
+to the dot routines. Printer stack use was optimized by pruning unneeded
+gsave/grestore commands. Temporary EPS files are now removed in inline PDF
+mode. A discussion of the 3D generalization of Hobby's algorithm used in
+Asymptote was added (intro.asy).
+
+Release Notes for Version 1.33
+
+Routines to find the 3D and projected 2D bounding boxes of Bezier surfaces
+were added to the surface module, along with the standard teapot example.
+Extended for loops were documented. The page numbering of slide
+presentations with stepping enabled was fixed. The int type is now a long
+long type (typically a 64-bit integer). Support for reading and writing
+64-bit integers in binary and XDR modes and large file support were added.
+Input files are now opened in input-only mode. Multiple invocations
+of labelpath now work. A projection bug in the grid3 module was fixed.
+The search path order was changed: directories specified by the dir
+configuration variable are now examined before the .asy subdirectory in the
+user's home directory. User configuration files are ignored during
+installation. Some bugs in asy-mode.el were fixed. Texput files are
+removed again. A memory allocation incompatibility in the workaround for
+old, broken readline libraries was fixed. The framepoint and truepoint
+routines now work even when an exact picture size estimate is unavailable;
+a picture scaling bug was fixed. Writing to a file specified with
+-o /dir/file.eps is allowed again. A quarticroots solver was added, the
+cubicroots solver was improved, and a complex quadraticroots solver was
+added. A workaround for broken texi2dvi installations was implemented.
+Memory leaks were fixed. The garbage collector was update to gc-7.0;
+upgrading to gv-3.6.3 is also recommended. A segmentation fault in
+complement was fixed.
+
+Release Notes for Version 1.32
+
+A recently introduced segmentation fault in subpath was fixed.
+The current directory can now be examined with cd() even if globalwrite is
+false. The cd path is now only written once in interactive mode.
+Further garbage collection improvements and leak fixes were made.
+
+Release Notes for Version 1.31
+
+Garbage collection was dramatically improved, resulting in reduced memory
+usage and increased speed. The options -compact and -divisor and the
+function purge() were added to give the user more control over garbage
+collection. The array virtual member function delete() with no arguments
+explicitly deletes all elements of the array.
+An interpolate(real[][] f, pen[] palette) function was added for
+constructing the pen array needed by the latticeshade routine.
+A nullpath frame and picture sizing bug was fixed.
+LaTeX diagnostics were improved. A facility that does not rely on
+garbage collection finalizers was implemented for closing open files
+at the end of each asy process.
+
+Release Notes for Version 1.30
+
+Constructors were added. Routines to allow access to guide
+components were added. The three-dimensional projection and contour
+routines were optimized. A tickmodifier NoZero and ticklabel format
+NoZeroFormat were added. A simplified gouraudshade interface was added.
+A linewidth bug was fixed. The array insert and delete routines were
+generalized. The new array virtual member "initialized" can be used to
+detect whether an element is initialized. All fonts are now automatically
+embedded in PDF files. Inline PDF animations now require version 2007/05/24
+or later of the animate.sty package. General root solving routines were added.
+The implicit initializer for files is null. Boolean arguments
+were added to the image and shading routines to allow one to disable
+data buffering. The functionality of the readline routine was split into
+the routines history, readline, and saveline. Many fixes were made to
+the Emacs asy-mode.el.
+
+Release Notes for Version 1.29
+
+Support for drawing surfaces described by the null space of real-valued
+functions of three variables was added. The dir command now works correctly
+for degenerate Bezier paths; an optional final argument can be used to
+examine incoming and outgoing tangent directions. Numerical overflow and
+precision issues were addressed. A piecewise monotonic spline type and
+example were added. Optional fillpen and legend entries were added to
+histogram. The "q" command quits in interactive mode only if there is no
+top-level variable of that name. Standard input of strings was
+fixed. Support for transparent PNG images in xasy was added. Animation
+support was upgraded to use the new animate.sty package rather than the
+interim pdfanim_temp.sty package.
+
+Release Notes for Version 1.28
+
+TeX error handling was improved. A dvipsOptions configuration variable was
+added. A recently introduced bug in the XDR routine xinput was fixed.
+Compilation under the upcoming GCC 4.3 release is now supported.
+Nonglobal PDF animations, where each frame is separately scaled and written
+to a file, were implemented. Reading from standard input now works correctly
+even in the absence of a working readline library. A build problem under
+Fedora Core 5 was fixed. Parallel builds are now supported.
+
+Release Notes for Version 1.27
+
+A Hermite spline graph interpolate type was added for smoothly joining
+sampled functions. The cycle3, tension3, and curl3 keywords were
+respectively renamed cycle, tension, and curl. Assignments no longer write
+the value at the prompt. A bug in longitudinal skeleton detection was
+fixed. The filloutside routine now works with paths that extend beyond the
+current boundary. The unit n-point cross function returns a cyclic path.
+The "append" argument of the output function was renamed to
+"update", which now allows both reads and writes to the data file.
+Negative arguments to seek mean relative to the end-of-file; a seekeof
+function was added. PDF animations can now be loaded from an external file.
+The TeX pipe handshaking was improved. TeXLive 2007 is now supported under
+MSWindows. A work around was implemented for a MikTeX bug in handling file
+names containing spaces.
+
+Release Notes for Version 1.26
+
+The correct surface normal is now used when calculating lighting; a Klein
+bottle example was added. The front/back detection of the transverse
+skeleton of solids of revolution is fixed. A better camera-independent
+reference value for resolving path3 orientation is used. A 3D midpoint
+routine was added. Tick values for broken axes can now be autogenerated;
+broken logarithmic axes are also supported. A 2D aligned axes example was
+added. A patch that fixes a redisplay bug in gv-3.6.2 is included.
+
+Release Notes for Version 1.25
+
+A new picture size routine, which maps specified user coordinates to a
+given final size, provides a convenient way of forcing the plotted
+subregion of a graph to have a fixed size. The correct surface
+normal is chosen when calculating lighting. The comment character can now be
+escaped when reading strings from data files (but is disabled when reading
+raw characters with getc). The new word file mode is useful for reading
+white space-delimited strings. PostScript output files are now explicitly
+designated as EPSF in the header line. The minimum width and height of
+flowchart blocks may now be controlled separately. Interpolation and knot
+theory modules were added. The usage of path vs. guide in the base files was
+standardized.
+
+Release Notes for Version 1.24
+
+Structures now have implicit initializers. PDF animations are supported in
+inline tex mode by communicating the texpreamble to LaTeX. The asypreamble
+environment was removed in favour of corresponding Asymptote commands in
+the asydef environment. Default y tick values were fixed. The binary space
+partition now works correctly for projections from infinity; an arbitrary
+target point can be specified for perspective projections. A 3D version of
+the intersectionpoints routine was added. Unconditional binary logical
+operators & and | and bitwise integer functions AND, OR, XOR, and NOT were
+defined; the array boolean operators && and || were renamed to & and |.
+The PostScript clipping code was fixed. The angle(rotate(x)) routine now
+always returns x (mod 360). User debugging errors are now cleared.
+The fontsize package was updated to use fix-cm.sty instead of type1cm.sty.
+The Microsoft Windows registry is checked for both GPL and AFPL Ghostscript.
+A workaround was implemented for a pdflatex vertical offset bug.
+Segmentation faults in the Delaunay triangulation and image codes were fixed.
+
+Release Notes for Version 1.23
+
+Microsoft Windows autoconfiguration has been implemented by querying the
+registry: Asymptote and the applications it depends on may now be installed in
+any location. The shipout command is allowed to write to other directories
+if and only if -global is true. An autoimport configuration setting was
+added. Importing the Gnu Scientific Library (gsl) now works on all
+platforms. A texpreamble environment to contain the LaTeX preamble for
+both LaTeX and Asymptote was added to asymptote.sty. A conflict with the
+French babel packages was fixed. Background picture sizing in the slide
+presentation package was fixed.
+
+Release Notes for Version 1.22
+
+Problems with loading LaTeX packages and slide presentations were fixed.
+Non-static variables in every loop iteration are now allocated anew.
+Formatting under locales with nonperiod decimal separators was fixed,
+along with logarithmic tick labels near the machine epsilon. Concatenation
+of nullpaths was fixed. New path markers were added and the perpendicular
+symbol in the geometry module was improved. The skeleton routines in the
+solids module were split to provide finer control. Routines to facilitate
+drawing 3d contours were added. Reading portable XDR binary data into
+arrays works again; functions for reading and writing also in native binary
+formats were added. The TeX preamble is no longer output in inline
+mode. The TeX pipe is now aware of a previously generated aux file. Memory
+leaks were fixed. An inline limit is now imposed on old compilers to speed
+up compilation. Setlocale warnings are disabled unless debugging is on. A
+colorspace command for extracting the colorspace of a pen was added. An
+Asymptote introductory slide presentation was added and a user-written
+Asymptote tutorial is now cited in the manual.
+
+Release Notes for Version 1.21
+
+Expressions entered at the interactive prompt are automatically evaluated
+and written to stdout. The routine intersectionpoints returns all
+intersection points of two paths. Bounding box computations of paths drawn
+with transformed pen nibs were fixed. Transparency and automatic
+colorspace promotion are supported when shading and drawing images.
+A grid3 module for drawing 3D grids and a binary tree module were added.
+Automatic tick computations were improved: the actual tick value is now
+passed to the ticklabel formatting routine, even for logarithmic axes.
+A tickmodifier routine gives users complete control over which of the
+auto-generated ticks actually get drawn. The contour drawing and filling
+routines were improved. A --where option makes --listvariables show where
+global functions and variables are declared. Emacs asy-mode was improved,
+including function source code lookup. An optional labelpath interface to
+the PSTricks pstextpath macro was implemented for drawing curved labels
+along paths. In inline latex usage, picture are no longer scaled by
+default (use \begin{asy}[\the\linewidth] to recover previous default of
+scaling to line width). A texcommand option was added to override the tex
+engine command name. The slide presentation module no longer forces
+pdflatex; bibliography support was added, figuremattpen was reimplemented,
+and the spurious vertical shifting of bullets was fixed. Compilation under
+AIX and IRIX systems is supported.
+
+Release Notes for Version 1.20
+
+Explicit yaxis label angles were fixed. Loading and including diagnostics
+under the -vv option were improved. The Emacs asy-mode now respects
+TeX-electric-sub-and-superscript. The texpath configuration variable and
+diagnostics were fixed under MSWindows. Low-resolution palettes now
+display correctly. A routine to fill cyclic contours was added, along with
+the example fillcontour.asy. A command-line option to change the current
+working directory was added. The FAQ was updated.
+
+Release Notes for Version 1.19
+
+Bezier surfaces were implemented, along with tensor and Coons patch
+shading. The cylinder function was changed to be consistent with the cone
+function. The intersect routine now returns an array of two reals.
+The unitsize, xunitsize, and yunitsize arguments of shipout have been
+replaced with a unitsize function. The seconds() function now works
+portably. Minor bugs in inside() were fixed; a winding number routine was
+added. The movie bounding box is set to the largest bounding box of all
+pictures. Portable high-quality embedded PDF movies are now supported, as
+well as portable external movies. An embedded U3D example was added.
+Alignment positioning transformation was fixed; a Rotate(pair) and a
+string(real x) routine was added. Flowchart routines and the labelbox and
+advection examples now work with pictures as well as frames.
+An add(picture pic=currentpicture, drawer d) wrapper was added; a picture
+rescaling bug was fixed. Tex error handling was improved. Optional bounds
+arguments were added to verbatim postscript and tex commands. Writing to
+only the local directory is allowed unless the -global (or -unsafe) option
+is specified. A final backslash continues a line on the interactive prompt;
+a new multiline option is convenient for cutting and pasting code in
+interactive mode. Clipping now sets the true size coordinates to 0. Memory
+usage was reduced. The documentation was updated, including a description
+of how to produce Debian binaries from RPM binaries.
+
+Release Notes for Version 1.18
+
+A pen caching problem and clipping bugs were fixed. Bugs in interactive
+mode and in linemode string reads were fixed. The picture.scale() routine
+now guards against division by zero. The drawing of surface meshes was fixed.
+The minbound and maxbound functions were implemented also for arrays.
+The labelx, labely, xtick, and ytick routines respect the current graph
+scaling. The asycolors.sty file was updated to remove the pstricks
+dependency. The slide package now works with both latex and pdflatex; the
+colordvi dependency was removed. A nativeformat() function returns "eps"
+or "pdf", depending on the current tex engine. The pdf() and latex()
+functions are now visible. The usepackage and minilatex modules check for
+latex mode. Static variable allocation is now discussed in the FAQ.
+An image histogram and contour example was added. The diatom example was
+modified to illustrate interaction of fixed-sized and scaled coordinates.
+
+Release Notes for Version 1.17
+
+A workaround for a garbage collection bus error under MacOS X was implemented.
+A uniform histogram routine was added to the stats module. New frequency
+binning routines were added. The argument order of the nonuniform frequency
+binning routines was interchanged for consistency (backwards incompatible).
+The FAQ was updated.
+
+Release Notes for Version 1.16
+
+Inline LaTeX mode was fixed. The legend routine was generalized to allow
+multiple entries per line; an example was added. The truepoint
+function was renamed framepoint. A function truepoint that works like point
+but accounts for fixed-sized objects was added.
+The picture.calculateTransform function now returns the actual transform used
+for fitting in the case where only an approximate picture size was
+available. A 2d frequency binning routine was added to the stats module.
+A memory leak was fixed.
+
+Release Notes for Version 1.15
+
+Graphics label bounds and incorrect path bounds in latticeshade were
+fixed. The LaTeX color package is now used for the latex and pdflatex engines,
+to keep them informed of the current color. A unitlength of 1pt is now
+enforced in inlinetex mode. In cases like 2D graphs where only an
+approximate picture size estimate is available, the transform is adjusted
+so that the fitted frame meets the size specification. The cube animation
+and binary space partition were fixed. The determinant of a singular
+matrix now returns 0 instead of an error. Temporary pdf files are removed.
+The gv patches were removed since these are included in the long-awaited
+gv-3.6.2 release. A workaround for a compilation problem under MacOS X
+10.3.9 was implemented. A DIN 15 CAD package and new examples were added.
+
+Release Notes for Version 1.14
+
+General affine transforms and clipping may be applied to TeX labels;
+bugs in label alignment transformation were fixed. The TeX engines latex,
+pdflatex, tex, and pdftex are supported. Separate xunitsize and
+yunitsize scalings are allowed. Graph axis bound communication was added
+to allow axes with ticks and unextended axes to be called on an empty
+picture. Path labels are drawn after the path (to support UnFill).
+Filltype definitions were standardized; a Draw filltype was added (for
+drawing a bounding box around a label). New filloutside routines were
+added. Images can be drawn for irregular mesh contours and two-dimensional
+pen arrays. Landscape slides automatically enable PDF autorotate option.
+A MetaPost buildcycle routine was added. Setlocale errors are ignored.
+The "Cannot write to venn_.tex" error under Windows XP was fixed. Very old
+readline libraries found on many MacOS X systems are detected. The editing
+mode asy-mode.el supports Emacs version 21. The option
+\usepackage[inline]{asymptote} is now supported under both latex and pdflatex.
+
+
+Release Notes for Version 1.13
+
+Image and contour transposition conventions for matrices were standardized;
+resolution arguments were removed from the matrix contour routines.
+The bounding box is now correctly calculated for square pen caps.
+A bug in drawline was fixed. An up argument was added to the projection
+routines to specify the camera orientation. The definition and
+documentation of cone was fixed; surface function signatures were
+consolidated. New 3d examples were added. Legends and markers are now
+allowed when drawing superpaths. Zero page alignment no longer suppresses
+labels; bounding box fuzz was removed. Intelligent interactive
+auto-completion was added. If scroll is negative, an entire page is
+scrolled. Support for Adobe Reader annotations was added.
+Write without data arguments now works like write with data arguments.
+A list function displays all global functions and variables in a module.
+The Emacs asy-mode.el was improved. A FAQ was added.
+
+Release Notes for Version 1.12
+
+PDF transparency was implemented. The documentation of Bezier curves was
+improved. Bounding box calculations now account for label scaling.
+A special case of the Step calculation in graph.asy was fixed. The function
+scroll(int) was changed to a setting; a quit (q) option was added to the
+scroll facility. To avoid an unwanted ghostscript window, gswin32c (rather
+than gswin32) is used by default for producing pdf files under MSDOS.
+
+Release Notes for Version 1.11
+
+The defaultformat string is used again for graph tick labelling commands
+instead of an empty format string. A workaround for the broken
+libsigsegv-2.3 library that caused a premature exit(1) was implemented.
+An extra blank line at the end of 3D array writes was removed; 3D array
+transpose and copy functions were added. The realmult routine was moved to
+runtime and documented. The example embeddedmovie of embedding movies
+within PDF files was added. Overflow diagnostic messages during mpeg merges
+are now suppressed. A twice setting was added to resolve LaTeX references.
+The settings module is now globally accessible. Duplicate trace messages
+were pruned. Debugger breakpoints can now be set using a matching substring
+instead of a line number. Conditional breakpoints are now supported.
+Runtime errors and interrupts no longer reset the interactive environment.
+
+Release Notes for Version 1.10
+
+Parametric surfaces were implemented and parametric graphs now respect
+picture scaling. Fill and FillDraw now work for markers and superpaths.
+A bug in reading strings from files was fixed. Support for MikTeX 2.5 and
+Autoconf > 2.59 was added. Asymptote and output filenames can now contain
+spaces. Interrupts are working again. A line-based debugger was implemented.
+
+Release Notes for Version 1.09
+
+The workaround for the gv-3.6.1 option handling bug now supports earlier
+versions of gv, including gv-3.5.8. By default, Ghostscript version 8.54 is
+used by the MSWindows version to produce PDF files.
+
+Release Notes for Version 1.08
+
+Resolution problems in the contour routines were fixed; null contour labels
+are now suppressed. Configuration problems were fixed; the malloc
+configuration checks were removed and the help command again knows the
+correct location of the manual. In the slides package, some stepping bugs
+were fixed, an institution field was added to the titlepage, and vbox
+support (say for aligned equations) was added. A colorless(pen) function
+that strips pen color attributes was added. A clean copy of the source
+files is now shipped.
+
+Release Notes for Version 1.07
+
+This release implements uniform and irregular mesh contour drawing
+algorithms: contours can be individually labelled or filled using a
+colour density palette. The flowchart interface and alignment were
+improved. A slope fields package was added. The arrow size limiting code
+was fixed. Some bugs in makepen were fixed. Image and shading functions
+now respect the -gray, -rgb, -cmyk, and -bw options. Date arithmetic routines
+were added. Several small bugs in the graph routines were fixed. Custom
+three-dimensional projections can now be easily constructed.
+
+The public keyword is now the default permission modifer. A new keyword,
+restricted, makes variables readable but not writeable outside the
+structure in which they are defined (previous this was the default behaviour).
+A user-transparent work around for the backwards-incompatible command-line
+options of gv-3.6.1 was implemented. Various configuration problems were
+addressed to better support the Asymptote rpm for the Fedora Core Extras
+project. A cputime() function was added.
+
+Release Notes for Version 1.06
+
+General flowchart routines and an example were added. Papersizes other than
+letter now work with -outformat pdf again. Performance was improved by
+avoiding unnecessary output flushing. An asycolors.sty package was added
+to make LaTeX aware of CMYK versions of predefined Asymptote colours.
+The default pdf viewer for MacOS is now "open". The -u option can now be
+specified multiple times on the command line. Optional x and y margin
+arguments were added to Fill. A reverse video option was added to
+slide.asy; titlepage and title by default call newslide, unless the
+currentpicture is empty. An argument was added to newslide to allow
+stepping to be turned off for that slide. The slidedemo example now
+generates any required eps files. A segmentation fault in eval was fixed.
+
+Release Notes for Version 1.05
+
+Shaded and skeletal representations of surfaces of rotation were
+implemented. New oblique projections were added and bugs in the 3D graph
+routines were fixed. An argument reversal in one of the add routines was
+fixed. A clipping margin was added to unfill. General determinants were
+added. Sin, Cos, Tan, aSin, aCos, and aTan, which use degrees, are now
+built-in functions. The dash adjustment algorithm was improved. The
+cubicroots solver now works again when R=0. Internal operations are now
+added for all variable declarations of new arrays and functions. Automatic
+viewing can easily be turned off under MSDOS. Nonstandard paper sizes
+are now correctly handled. The C locale is always used when producing
+postscript patterns. Configuration problems were fixed. The editor
+customization files asy.vim and asy-mode.el were moved to the Asymptote
+system directory. Stepping of slide presentations can now be enabled from
+the command line. Many new tests were implemented. The examples were moved
+to the examples subdirectory of the documentation directory.
+RPM files are now released.
+
+Release Notes for Version 1.04
+
+A convenient presentation slide package was developed. The misalignment of
+TeX and PostScript layers was fixed by giving includegraphics the exact
+bounding box. The overall bounding box was also fixed. The tension atleast
+command and the clipping of remote labels by unfill near the frame boundary
+were fixed. Permission checking for types was added. The new point-like
+truepoint function uses the actual current picture size. Locale support,
+the ', I, and F format specifiers, and custom pagewidth and pageheight
+settings were added. A Ticks specifier draws ticks on both sides of the path;
+format="%" also suppress tick labels for logarithmic axis.
+The linetype adjustment to the arclength was improved and can now be
+optionally disabled. Color names were systematized, including texcolors
+and x11colors. A general purpose user command-line option accepts arbitrary
+Asymptote code as a string. All duplicate path points in three.asy are now
+removed. A convenient fixedscaling picture sizing routine was added.
+Selected special functions from the GNU scientific library, DESTDIR support,
+and a Python module to access Asymptote commands were added.
+The legend skip is now based on the actual legend entry height, not the
+fontsize. A backwards incompatibility was introduced in attach, add, and
+legends (add and attach take arguments in the same order as label):
+
+attach(point(E),legend(20E),UnFill) -> attach(legend(),point(E),20E,UnFill).
+
+Release Notes for Version 1.03
+
+Support was added for compiling under gcc-4.1.0. A memory leak in
+interactive mode was fixed. A procedure for using CJK fonts was documented.
+The return type of the three-dimensional intersectionpoint routines was
+fixed. A function for inverting 2D points projected from 3D back onto a
+specified plane was added, along with a solid geometry package with
+routines to draw cylinders. New xaxis(triple,real), min(guide3[]), and
+max(guide3[]) convenience functions were added. A Degrees function like
+degrees(pair), except that it returns 0 for a (0,0) argument rather than
+generating an error, was added. Interactive mode (without command-line
+editing or history) now works even in the absence of the GNU readline
+library. An upper limit (100000) on the number of calls to intersectcubics
+per cubic segment was imposed on the intersection routines. The
+documentation was updated.
+
+Release Notes for Version 1.02
+
+Lighting was implemented for surfaces described by functions and matrices.
+A bug in the positioning of axis labels was fixed. The type of randMax was
+fixed. Configuration and diagnostics were improved; the "dir" setting in
+configuration files is respected. Under MSDOS, the configuration file is
+now %USERPROFILE%/.asy/config.asy; configuration settings now work as
+documented. On UNIX systems, installation can optionally be performed
+without root privileges. Errors thrown by the parser while reading the
+configuration file are now handled gracefully. The patches to pstoedit
+were removed since they are now included in pstoedit-3.44.
+
+Release Notes for Version 1.01
+
+A bug in the surface plot of a matrix was fixed. A workaround was
+implemented for the broken GNU readline/history library under MacOS.
+
+Release Notes for Version 1.00
+
+A pen bounds error was fixed. A bug in the linear equations solver was
+fixed. Images now transform properly and nonsquare images appear
+correctly. The legend argument of draw accepts a Label. An interface to
+the movie15 package for embedding movies, sounds, and 3D objects within a
+PDF file was added. A bug where nonsolid pen types were ignored was fixed.
+Missing xpart, ypart, and zpart functions were re-added. A segmentation
+fault in format was fixed. An interface to the GNU readline function was
+added to allow editing of input. A complement function was added. A bug in
+the 2D graph tick selection routines was fixed; xlimits and ylimits no
+longer crop data by default. For consistency, the "includegraphics"
+labeling function was renamed to "graphic".
+
+Release Notes for Version 0.99
+
+A bus error and compilation error under MacOS X were fixed. If -debug is
+set, execution continues after the first error. The "make check" code was
+fixed. The contributed MacOS X binary site is now mentioned in the
+documentation.
+
+Release Notes for Version 0.98
+
+Command-line options and configuration variables were reorganized into an
+Asymptote settings module, allowing default values to be set in
+~/.asy/config.asy (~/.asy/options is obsolete). Command-line options
+can be negated by prepending -no to the option name. Type-dependent
+function and record operators are now added to the parent record.
+Execution stops after the first error in a runnable. Two- and
+three-dimensional array min/max functions for all ordered builtin types
+were implemented. Comments are now allowed within 3d data blocks. The base
+file plain.asy was split into many subfiles. The currentpen nib is
+respected. Warning messages are suppressed when shipping out an empty
+picture. The tick computation was fixed when xaxis and yaxis are called
+with explicit limits. The -t option was removed as it is no longer needed
+for generating inline tex files. Machine constants are now implemented as
+variables rather than functions.
+
+Release Notes for Version 0.97
+
+An uninitialized pen transform bug was fixed. A workaround was added for a
+readline incompatibility under MacOS X 10.4.3. Incorrect and missing names
+for builtin function arguments were fixed. Duplicate functions were removed.
+
+Release Notes for Version 0.96
+
+A MetaPost-style makepen function allows the default pen nib to be changed
+to any polygonal (possibly nonconvex) cyclic path. A unitsize argument was
+added to the shipout command. Three-dimensional lighting effects were
+added and illustrated with the Gouraud shading of a sphere. The MidArrow
+attribute was fixed. Builtin functions now have named arguments. Brackets
+are now part of the quote syntax. The write command was generalized
+to allow writing a list of vectors as columns. Drawing to standard output
+now works even when there are no labels. The -noView command was replace
+by -nView or -no View. Several segmentation faults were fixed. Custom axis
+types were documented.
+
+Release Notes for Version 0.95
+
+A memory leak was fixed; garbage collection messages are now suppressed
+unless the -d option is given. In interactive mode, a reset keyword was
+implemented to restore the environment, except for the scroll setting.
+The interactive input command now does an automatic reset. A link was
+added to the GNU readline library documentation for customizing interactive
+key bindings. A hang in scroll mode on an end-of-file condition was
+fixed. To reduce LaTeX memory usage, the scalebox macro is used only where
+required. A legend problem was fixed. The documentation was updated.
+
+Release Notes for Version 0.94
+
+A label bug arising from a conflict between some versions of the LaTeX
+pstricks and graphicx packages was fixed. Embedded LaTeX files are always
+run in quiet (-noView) mode. Frame loading issues with imported types
+(for example, with the triangle SAS constructor in the geometry module) was
+fixed. The command import graph is now an abbreviation for access graph;
+unravel graph.
+
+Release Notes for Version 0.93
+
+The import scheme was completely redesigned, with new keywords access,
+unravel, from, and include. A true (rather than emulated) interactive mode
+and runtime imports have been implemented. The default pdf browser is now
+acroread; the pdf fuzz workaround for gv was removed. The tension3 and
+curl3 keywords were re-added; a surface graph routine for matrices was
+implemented. Problems with csv mode were fixed. The function defaultpen()
+was renamed to resetdefaultpen(). Integer division via quotient(int,int)
+is now consistent with the modulo (%) operator. Checks for integer
+overflow and erf, erfc, and gamma functions were added. More descriptive
+names latticeshade, axialshade, radialshade, and gouraudshade for the
+shading routines were chosen. Horizontal and vertical label scaling was
+implemented. Default command line style-parameters can now be stored in
+~/.asy/options. The interactive history file is now ~/.asy/history by
+default unless -localhistory is specified. Outputting to standard output
+via "-o -" is now allowed.
+
+
+Release Notes for Version 0.92
+
+Clipping now clips labels and all layers of a picture, not just the most
+recent one. A bug in precontrol and postcontrol was fixed. A ticklabel bug
+and precision errors at +/-1e-4 were fixed. An example of a "broken" x
+axis was added. A dot product now requires explicit pair arguments.
+The implicit cast from real to pen was removed. Straight flags are now
+preserved when using a path as part of a guide. An UnFill filltype was
+added for clipping underneath labels and legends. A struct marker was added
+to support arbitrary marker locations. Directories are no longer stripped
+from explicit output filenames.
+
+A function inside was implemented to test whether a point is inside a
+cyclic path. The routines inside, quadratic solver, and intersect in
+math.asy were replaced by internal C++ routines. A robust real cubic root
+solver was added. A floating point exception in complex powers when base is
+zero was fixed. Colinearity checks were added to the leastsquares routine.
+
+The interface to plane was changed to return a representation of the plane
+through point O with normal cross(u,v). The routine intersectionpoint was
+moved to plain.asy and a 3d version was added to three.asy. We now draw
+over existing TeX layers when doing 3d hidden surface removal. A 3d aspect
+ratio can now be specified. A gui() function and MSWindows support for xasy
+was added; this will require renaming "gui(" to "GUI(" in any existing .gui
+files. The dir argument of picture.fit() was moved to add(frame,pair)
+and attach(frame,pair):
+
+add(pic.fit(E)) -> add(pic.fit(),E).
+
+Release Notes for Version 0.91
+
+Fixed GUI transforms: grouping should not depend on deconstruct flag.
+
+Release Notes for Version 0.90
+
+Default function arguments are now evaluated in the scope where the
+function is defined, not in the scope of the caller. The depth handling
+of deferred TeX labels was fixed. The positioning of 3d axes labels was
+improved; an example showing tick and axis label rotation was added.
+A minimum value of fuzz in the intersect routines is enforced to prevent
+infinite loops. An error in the man page regarding the -t option was
+fixed. The write function was generalized to handle an arbitrary number of
+data values.
+
+Release Notes for Version 0.89
+
+The processing of GUI files was fixed. User-specified ticks now work also
+with logarithmic axes. The arguments of LeftTicks and RightTicks were
+standardized; it is now possible to include a general string(real) routine
+to typeset each label. Logarithmic axes ranges of less than a decade are no
+longer upscaled when autoscaling is disabled. All references to the
+mailing list were removed from the documentation since the forum is now
+used in its place. The temporary included PostScript file suffix was
+renamed from "ps" to "eps".
+
+Release Notes for Version 0.88
+
+The graph routines were overhauled to support both two- and three-
+dimensional axes, partitioning them uniformly in tick value space,
+not with respect to arclength. An empty format string is treated as
+defaultformat. A fuzz parameter was added to the intersect routines;
+these routines now work for points. Data file comments were implemented.
+The perpendicular routine now uses an alignment argument; scale(pair) was
+removed. An option was added to asymptote.sty to make all LaTeX symbols
+visible, along with a second optional string to Label for providing a size
+estimate for undefined labels. Numerous small bugs were fixed; the
+pstoedit patch was updated. The installation and instructions were
+improved. An environment variable for every external command was added.
+
+The argument order of the axes routines was standardized; a call like
+xaxis(min,max,"$x$",red,Bottom,LeftTicks);
+should now be written
+xaxis("$x$",Bottom,min,max,red,LeftTicks);
+
+Release Notes for Version 0.87
+
+This release implements general hidden surface removal using a binary space
+partition and adds three-dimensional versions of the standard path
+functions (arclength, subpath, intersect, etc.), along with circle and arc
+functions. Hidden surfaces in regular mesh surface plots now are properly
+handled from any camera location. The arclength rather than the length is
+used for determining default label position on paths; Relative(real) and
+Relative(pair) functions were added for labelling paths relative to the
+total arclength and local path direction. Structure constructors and
+operators == and != were implemented and documented. The permissions of
+static functions within structures was fixed. A pen argument to filltype
+Fill to specify an interior pen distinct from the boundary pen was added.
+For convenience, array push members now return the pushed element.
+A missing shift in Label.out(frame) was added. The feynman module was
+updated to include a new function texshipout; MidArrow was moved to
+plain.asy. The optional position arguments of BeginArrow and related
+functions were fixed. A numerically robust quadratic equation solver was
+added.
+
+Release Notes for Version 0.86
+
+Fixed make man problems.
+
+Release Notes for Version 0.85
+
+A fully three-dimensional, rotationally invariant, generalization of the
+two-dimensional MetaPost path construction algorithms has been
+implemented. A tridiagonal solver was added. Adobe's automatic rotation of
+PDF files was disabled. Cyclic indices are now allowed only on arrays
+having the virtual cyclic flag set to true. The bug fix in simplex was
+generalized. An online help option was added to interactive mode; exit is
+now a synonym for quit. Microsoft Windows resource fields and an icon were
+added. ASYMPTOTE_DIR can now be a list of directories.
+
+Since some files were moved in this release, Microsoft users may wish to
+first uninstall the previous release to avoid duplicate files.
+
+Release Notes for Version 0.84
+
+This release ports Asymptote to the Microsoft Windows operating system; an
+executable file is distributed. Label parameters are now in a structure
+called Label, to which strings are implicitly cast, and which can be
+rotated and shifted with a transform. Automatic sizing under picture
+transformation was fixed. A bug in the simplex method was fixed. Lattice
+and Gouraud shading were added. An array append method, virtual transform
+components, and transform 6-tuple notation were added. A pen and filltype
+were added to legend. The 2d graph and palette code were cleaned up.
+An extend option was added to draw ticks across the graph for producing a
+grid. Problems with nullguide3 were fixed, the arguments of 3d rotate were
+swapped, and 3d reflections were added. A spurious papersize comment
+inserted by newer versions of dvips was removed. Pstoedit support was updated.
+
+This release introduces a few minor backward incompatibilities. Here is a
+summary of the main changes:
+
+draw("text",(0,0)--(1,1),1.0) -> draw(Label("text",1.0),(0,0)--(1,1))
+label("text",90,(0,0)) -> label(rotate(90)*"text",(0,0))
+labeldot("text",(0,0)) -> dot("text",(0,0))
+labeldot((0,0)) -> dot(Label,(0,0))
+labelbox(2mm,2mm,"text",(0,0)) -> box(Label("text",(0,0)),2mm,2mm)
+xaxis("$x$",0.5) -> xaxis(Label("$x$",0.5))
+labelxtick(1) -> xtick(Label,1)
+
+Release Notes for Version 0.83
+
+This release extends Asymptote to three dimensions. A triple type (which
+replaces the old vector type in math.asy) and a guide3 type were added,
+along with the 3D projection routines in three.asy. Three-dimensional
+arrays can now be read in line mode, using blank lines as block
+delimiters. An array pop function was added. Math mode ($ delimiters) were
+moved to within the "defaultformat" string, to allow use of non-math mode
+fonts in tick labels (by overriding the default format). A pticklabel
+option for drawing tick labels with a different pen was added. Routines
+labelxtick and labelytick were added, and the tick size and shift in xtick
+were fixed. The autoscaling of unextended axes was fixed. The xline and
+yline routines were renamed to xequals and yequals, Dot was renamed to dot,
+Cross was renamed to cross, the function "Angle(pair)" was renamed to
+"degrees(pair)", and a "Degrees(pair)" function was added to math.asy. The
+Metapost --- operator and the replacement :: for the MetaPost ... operator
+were implemented. A segmentation fault involving controls points with
+direction specifiers and a bug in "string font(pen)" were fixed. Tensions
+in straight sections of paths are now handled as in MetaPost. The -l option
+was reimplemented.
+
+Release Notes for Version 0.82
+
+Initializers for structures and general cast operators can be specified.
+Functions can be called with named (keyword) arguments, in any order.
+Rest arguments are supported. Size and aspect ratio arguments, which may
+be specified with "size", were removed from "shipout". The tick routines
+were standardized; custom tick locations and arrows on axes were implemented.
+The default frame initializer nullframe was renamed to newframe. A segmentation
+fault in the file garbage collection code and an optimization-related bug
+in fill were fixed.
+
+Unlike in the C and C++ languages, an assignment in a function argument is
+now interpreted as an assignment to a parameter of the same name in the
+function signature, not within the local scope. The command-line option -d
+may be used to check Asymptote code for cases where a named function
+argument may be mistaken for a local assignment.
+
+Release Notes for Version 0.81
+
+A guide solver bug was fixed, allowing the construction of graphs with a single
+data point. Compilation under g++-4.0.0 is now supported.
+
+Release Notes for Version 0.80
+
+A segmentation fault on the alpha (cxx) and mac platforms was fixed.
+All members of the picture structure are now deep copied.
+The latest Boehm garbage collector (version 6.5) is used by default.
+
+Release Notes for Version 0.79
+
+Types are now cached to speed up parsing. All outstanding garbage collection
+issues were addressed. The autoscaling of scaled axes was fixed.
+Another example of a secondary axis was added to the documentation.
+A Pythagorean tree example illustrates picture transforms.
+
+Release Notes for Version 0.78
+
+A binary search routine was added for sorted arrays. The handling of NAN
+values was fixed. The "checkaxis" test in graph.asy was improved.
+A problem with implicit closing of files was fixed. Minor changes were made
+to support compilation under Cygwin. A workaround for the garbage
+collection warning about repeated allocation of very large
+blocks was introduced, along with other miscellaneous garbage collection
+updates. A configuration option was added to request use of a (slower,
+multi-theaded) system version of the Boehm garbage collector.
+
+Release Notes for Version 0.77
+
+Integer arguments are now converted to real values before dividing and a real
+quotient is returned. The "quotient(int, int)" function returns the integer
+part of that result. Garbage collection has been implemented to fix memory
+leaks. A knot solving bug was fixed. Pen "plabel" vs. "p" issues were
+addressed. The eval function was renamed to map and the new eval(string)
+function was documented. The concat function can be used to concatenate two
+arrays. Complex exponential and logarithmic functions were added. The new
+function reltime can be used to compute the label position argument for draw.
+A new geometry module includes a triangle structure and functions to draw
+interior arcs of triangles and perpendicular symbols.
+
+Release Notes for Version 0.76
+
+Installation has been simplified by removing the last remaining dependency
+on the boost header files. A "plabel" argument was added to "draw" to allow
+labels and legends to use a different pen than the curve itself. The pen
+arguments in the axes routines were rearranged to be consistent with
+"draw". TeX errors in interactive mode and the TeX preamble are now
+handled properly. New functions "getstring" and "getreal" can get and
+remember user parameters. Marker frame arrays, a "Mark(int)" function,
+and "node", "value", and "slope" path computation functions were added.
+Problems with implicit scaling were addressed. The "without side-effect"
+warning was removed. An option was added to list all loaded global
+functions. The documentation of structures was improved.
+
+Release Notes for Version 0.75
+
+This release fixes a number of bugs with the new parser controller,
+including a segmentation fault with the -p option, problems with
+interactive mode, and problems reading from standard input. The graph
+module now uses a better default value of axislabelmargin for positioning
+axis labels. The put argument of the axis routines was moved to the end of
+the argument list, for consistency with draw. Convenient xline and yline
+interfaces to the axis routines were added. The definition of the
+correlation coefficient in the least squares routine was fixed, and a fit
+function was added to the 'linefit' structure. A linear interpolation (with
+endpoint extrapolation) and a binary search routine were added to math.asy.
+
+Release Notes for Version 0.74
+
+This release fixes a segmentation fault in version 0.73 and also reduces
+the default number of colors in image palettes to work around
+PostScript/PDF limitations (that can cause the manual not to print).
+
+Release Notes for Version 0.73
+
+A more efficient type-safe union was used to speed up the virtual machine
+by roughly a factor of 5. New routines "ellipse" and "labelellipse"
+were added for drawing ovals around frames and labels. The function
+"bbox(frame)" was renamed "box(frame)". These routines now prepend to
+the frame for filling with a background color; they also return the boundary
+as a guide. A workaround was added for a bug in gcc version 3.3 to
+facilitate compilation under Darwin (MacOS). Many internal coding
+improvements were made.