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<TITLE>TeXdraw - D. Alphabetic listing of commands</TITLE>
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<H1><A NAME="SEC39" HREF="texdraw_toc.html#TOC39">D. Alphabetic listing of commands</A></H1>
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<A NAME="IDX186"></A>
<DL COMPACT>
<DT><CODE>\arrowheadsize l:<VAR>length</VAR> w:<VAR>width</VAR></CODE>
<DD>
Set the arrowhead size to be <VAR>length</VAR> units long and <VAR>width</VAR>
units wide. The width is measured across the "base" of the arrowhead.
The initial arrowhead size has a <VAR>length</VAR> of 0.16 inches and a
<VAR>width</VAR> of 0.08 inches.
<DT><CODE>\arrowheadtype t:<VAR>type</VAR></CODE>
<DD>
Set the arrowhead type to <VAR>type</VAR>, where <VAR>type</VAR> is one of
<CODE>F</CODE>, <CODE>T</CODE>, <CODE>W</CODE>, <CODE>V</CODE>, or <CODE>H</CODE>. There are two
kinds of arrowheads. The first kind is a triangle. There are 3
variants: type <CODE>T</CODE> is an empty triangle, type <CODE>F</CODE> is a filled
triangle (using the current gray level for lines), type <CODE>W</CODE> is a
triangle filled with white. The second kind of arrowhead is an open
ended Vee. There are 2 variants: type <CODE>V</CODE> has the stem continue to
the tip, type <CODE>H</CODE> has the stem stop at the base of the arrowhead.
The initial arrowhead type is <CODE>T</CODE>.
<DT><CODE>\avec (<VAR>x</VAR> <VAR>y</VAR>)</CODE>
<DD>
Draw a line with an arrowhead from the current position to
<CODE>(<VAR>x</VAR> <VAR>y</VAR>)</CODE>. The new current position is <CODE>(<VAR>x</VAR>
<VAR>y</VAR>)</CODE>. The arrowhead is aligned with the line, with the tip at
<CODE>(<VAR>x</VAR> <VAR>y</VAR>)</CODE>.
<DT><CODE>\begin{texdraw}</CODE>
<DD>
Start a TeXdraw drawing. The drawing is terminated with an
<CODE>\end{texdraw}</CODE> command. This command is for use with LaTeX.
<DT><CODE>\bsegment</CODE>
<DD>
Start a drawing segment. The coordinate system is shifted such that the
current position corresponds to the coordinate <CODE>(0 0)</CODE>. Changes to
scaling, position and line parameters stay local to the drawing segment.
<DT><CODE>\btexdraw</CODE>
<DD>
Start a TeXdraw drawing. The drawing is terminated with an
<CODE>\etexdraw</CODE> command.
<DT><CODE>\centertexdraw { ... }</CODE>
<DD>
Center a TeXdraw box. The argument contains TeXdraw commands.
The resulting box has the horizontal size <CODE>\hsize</CODE> and height equal
to the height of the drawing.
<DT><CODE>\clvec (<VAR>x1</VAR> <VAR>y1</VAR>)(<VAR>x2</VAR> <VAR>y2</VAR>)(<VAR>x3</VAR> <VAR>y3</VAR>)</CODE>
<DD>
Draw a Bezier curve from the current position to the coordinate
<CODE>(<VAR>x3</VAR> <VAR>y3</VAR>)</CODE> which becomes the new current position. The
coordinates <CODE>(<VAR>x1</VAR> <VAR>y1</VAR>)</CODE> and <CODE>(<VAR>x2</VAR> <VAR>y2</VAR>)</CODE>
serve as control points for the curve. Only the last coordinate given
is used to update the size of the drawing.
<DT><CODE>\drawbb</CODE>
<DD>
Draw a ruled box around the effective size of a drawing produced by
TeXdraw commands.
<DT><CODE>\drawdim <VAR>dim</VAR></CODE>
<DD>
Set the units to <VAR>dim</VAR>. The argument <VAR>dim</VAR> can be any valid
TeX dimension unit. The units are used to interpret coordinate
values. Examples of valid units: <CODE>cm</CODE>, <CODE>mm</CODE>, <CODE>in</CODE>,
<CODE>pt</CODE>, and <CODE>bp</CODE>.
<DT><CODE>\end{texdraw}</CODE>
<DD>
End a TeXdraw drawing started with a <CODE>\begin{texdraw}</CODE>
command. The resulting TeXdraw drawing is placed in a box with
height equal to the height of the drawing and width equal to the width
of the drawing. The depth of the box is zero. This command is for use
with LaTeX.
<DT><CODE>\esegment</CODE>
<DD>
End a drawing segment. The current position in effect before the
corresponding <CODE>\bsegment</CODE> command is restored. The scaling and
line parameter values revert to those in effect before the corresponding
<CODE>\bsegment</CODE> was invoked.
<DT><CODE>\etexdraw</CODE>
<DD>
End a TeXdraw drawing started with a <CODE>\btexdraw</CODE> command. The
resulting TeXdraw drawing is placed in a box with height equal to the
height of the drawing and width equal to the width of the drawing. The
depth of the box is zero.
<DT><CODE>\everytexdraw { ... }</CODE>
<DD>
Specify TeXdraw commands to be executed at the beginning of every
TeXdraw drawing.
<DT><CODE>\fcir f:<VAR>level</VAR> r:<VAR>radius</VAR></CODE>
<DD>
Draw a filled circle with center at the current position. The radius is
specified by <VAR>radius</VAR>. The circle is painted with the gray level
specified by <VAR>level</VAR>. A gray level of 1 corresponds to white, with
decreasing values getting darker. The level 0 is full black. This
command does not draw a line along the circumference. The drawing size
is increased if necessary to contain the circle.
<DT><CODE>\fellip f:<VAR>level</VAR> rx:<VAR>x-radius</VAR> ry:<VAR>y-radius</VAR></CODE>
<DD>
Draw a filled ellipse with center at the current position. The radius
in the <VAR>x</VAR> direction is specified by <VAR>x-radius</VAR>. The radius in
the <VAR>y</VAR> direction is specified by <VAR>y-radius</VAR>. The ellipse is
painted with the gray level specified by <VAR>level</VAR>. A gray level of 1
corresponds to white, with decreasing values getting darker. The level
0 is full black. This command does not draw a line along the boundary
of the ellipse. The drawing size is increased if necessary to contain
the ellipse.
<DT><CODE>\htext (<VAR>x</VAR> <VAR>y</VAR>){<VAR>text</VAR>}</CODE>
<DD>
<DT><CODE>\htext {<VAR>text</VAR>}</CODE>
<DD>
The first form of this command places the TeX text <VAR>text</VAR>
horizontally with the text reference point at the coordinate
<CODE>(<VAR>x</VAR> <VAR>y</VAR>)</CODE>. The new current position is <CODE>(<VAR>x</VAR>
<VAR>y</VAR>)</CODE>. The second form of this command places the TeX text
<VAR>text</VAR> horizontally with the text reference point at the current
position. The text reference point is set with the <CODE>\textref</CODE>
command.
<DT><CODE>\ifill f:<VAR>level</VAR></CODE>
<DD>
Close the current path and paint the interior of the region with gray
level <VAR>level</VAR>. The line around the path is not drawn. Gray levels
are real values from 0 (black) through intermediate values (grays) to 1
(white).
<DT><CODE>\larc r:<VAR>radius</VAR> sd:<VAR>start-angle</VAR> ed:<VAR>end-angle</VAR></CODE>
<DD>
Draw a counterclockwise arc. The center of the arc is at the current
position. The radius is specified by <VAR>radius</VAR>. The start and end
angles (in degrees) are specified by <VAR>start-angle</VAR> and
<VAR>end-angle</VAR>. This command does not affect the limits (size) of the
drawing.
<DT><CODE>\lcir r:<VAR>radius</VAR></CODE>
<DD>
Draw a circle with center at the current position. The radius is
specified by <VAR>radius</VAR>. This command draws a line along the
circumference of the circle. The drawing size is increased if necessary
to contain the circle.
<DT><CODE>\lellip rx:<VAR>x-radius</VAR> ry:<VAR>y-radius</VAR></CODE>
<DD>
Draw an ellipse with center at the current position. The radius in the
<VAR>x</VAR> direction is specified by <VAR>x-radius</VAR>. The radius in the
<VAR>y</VAR> direction is specified by <VAR>y-radius</VAR>. The drawing size is
increased if necessary to contain the ellipse.
<DT><CODE>\lfill f:<VAR>level</VAR></CODE>
<DD>
Close the current path, draw the line around the path using the current
grey level for lines and paint the interior of the region with specified
gray level <VAR>level</VAR>. Gray levels are real values from 0 (black)
through intermediate values (grays) to 1 (white).
<DT><CODE>\linewd <VAR>width</VAR></CODE>
<DD>
Set the line width to <VAR>width</VAR> units. Initially <VAR>width</VAR> is 0.01
inches (corresponding to 3 pixels at 300 pixels to the inch).
<DT><CODE>\lpatt (<VAR>pattern</VAR>)</CODE>
<DD>
Set lines to have the pattern <CODE>(<VAR>pattern</VAR>)</CODE>. A pattern is a
sequence of on/off lengths separated by blanks and enclosed in parentheses.
The lengths alternately specify the length of a dash and the length of a
gap between dashes. Each length is interpreted using the current
scaling and drawing units. The pattern is used cyclically. The empty
pattern signifies a solid line. The initial line pattern is a solid
line, corresponding to the empty pattern <CODE>\lpatt ()</CODE>.
<DT><CODE>\lvec (<VAR>x</VAR> <VAR>y</VAR>)</CODE>
<DD>
Draw a line from the current position to coordinate <CODE>(<VAR>x</VAR>
<VAR>y</VAR>)</CODE>. The new current position is <CODE>(<VAR>x</VAR> <VAR>y</VAR>)</CODE>.
<DT><CODE>\move (<VAR>x</VAR> <VAR>y</VAR>)</CODE>
<DD>
Move to coordinate <CODE>(<VAR>x</VAR> <VAR>y</VAR>)</CODE>. The new current position
is <CODE>(<VAR>x</VAR> <VAR>y</VAR>)</CODE>.
<DT><CODE>\ravec (<VAR>dx</VAR> <VAR>dy</VAR>)</CODE>
<DD>
Draw a line with an arrowhead from the current position, <VAR>dx</VAR> units
in the <VAR>x</VAR> direction and <VAR>y</VAR> units in the <VAR>y</VAR> direction.
The final position becomes the new current position. The arrowhead is
aligned with the line, with the tip at the new current position.
<DT><CODE>\relsegscale <VAR>value</VAR></CODE>
<DD>
Adjust the segment scale factor by multiplying by <VAR>value</VAR>. This has
the effect of multiplying the current overall scale factor by the same
factor. The overall scaling factor is the product of the unit scale
factor and the segment scale factor.
<DT><CODE>\relunitscale <VAR>value</VAR></CODE>
<DD>
Adjust the unit scale factor by multiplying by <VAR>value</VAR>. This has
the effect of multiplying the overall scale factor by the same factor.
The overall scaling factor is the product of the unit scale factor and
the segment scale factor.
<DT><CODE>\rlvec (<VAR>dx</VAR> <VAR>dy</VAR>)</CODE>
<DD>
Draw a line from the current position, <VAR>dx</VAR> units in the <VAR>x</VAR>
direction and <VAR>dy</VAR> units in the <VAR>y</VAR> direction. The final
position becomes the new current position.
<DT><CODE>\rmove (<VAR>dx</VAR> <VAR>dy</VAR>)</CODE>
<DD>
Move from the current position, <VAR>dx</VAR> units in the <VAR>x</VAR> direction
and <VAR>dy</VAR> units in the <VAR>y</VAR> direction. The final position becomes
the new current position.
<DT><CODE>\rtext td:<VAR>angle</VAR> (x y){<VAR>text</VAR>}</CODE>
<DD>
<DT><CODE>\rtext td:<VAR>angle</VAR> {<VAR>text</VAR>}</CODE>
<DD>
The first form of this command places the TeX text <VAR>text</VAR> at an
angle with the text reference point at the coordinate <CODE>(<VAR>x</VAR>
<VAR>y</VAR>)</CODE>. The new current position is <CODE>(<VAR>x</VAR> <VAR>y</VAR>)</CODE>. The
second form of this command places the TeX text <VAR>text</VAR> at an
angle with the text reference point at the current position. In both
cases, the TeX text is placed in a box and the box is rotated
counterclockwise by <VAR>angle</VAR> degrees about the text reference point.
The text reference point is set with the <CODE>\textref</CODE> command.
<DT><CODE>\savecurrpos (*<VAR>px</VAR> *<VAR>py</VAR>)</CODE>
<DD>
Save the current position as the absolute position referenced by
<CODE>(*<VAR>px</VAR> *<VAR>py</VAR>)</CODE>.
<DT><CODE>\savepos (<VAR>x</VAR> <VAR>y</VAR>)(*<VAR>px</VAR> *<VAR>py</VAR>)</CODE>
<DD>
Save the coordinate position <CODE>(<VAR>x</VAR> <VAR>y</VAR>)</CODE> as the absolute
position referenced by <CODE>(*<VAR>px</VAR> *<VAR>py</VAR>)</CODE>. The coordinate
<CODE>(<VAR>x</VAR> <VAR>y</VAR>)</CODE> is interpreted in the normal fashion as a
coordinate relative to the current segment, using the current scaling
factors and drawing unit.
<DT><CODE>\setgray <VAR>level</VAR></CODE>
<DD>
Set the gray level of lines. Gray levels are real values from 0 (black)
through intermediate values (gray) to 1 (white). The initial gray level
is 0 corresponding to black.
<DT><CODE>\setsegscale <VAR>scale</VAR></CODE>
<DD>
Set the segment scale factor. The argument <VAR>scale</VAR> is a real number
which is used to scale coordinate values. The overall scale factor is
the product of the unit scale factor and the segment scale factor.
<DT><CODE>\setunitscale <VAR>scale</VAR></CODE>
<DD>
Set the unit scaling to <VAR>scale</VAR>. The argument <VAR>scale</VAR> is a real
number which is used to scale coordinate values. The overall scaling
factor is the product of the unit scale factor and the segment scale
factor.
<DT><CODE>\texdrawbox { ... }</CODE>
<DD>
Create a TeXdraw box. The argument contains TeXdraw commands.
This macro returns a TeX box with height equal to the height of the
drawing and width equal to the width of the drawing. The depth of the
box is zero.
<DT><CODE>\textref h:<VAR>h-ref</VAR> v:<VAR>v-ref</VAR></CODE>
<DD>
Set the text reference point for subsequent text commands. The
horizontal reference point <VAR>h-ref</VAR> is one of <CODE>L</CODE>, <CODE>C</CODE> or
<CODE>R</CODE> (left, center or right). The vertical reference point
<VAR>v-ref</VAR> is one of <CODE>T</CODE>, <CODE>C</CODE> or <CODE>B</CODE> (top, center or
bottom). For rotated text, the reference point is determined before
rotation. The initial text reference point corresponds to
<CODE>\textref h:L v:B</CODE>.
<DT><CODE>\vtext (x y){<VAR>text</VAR>}</CODE>
<DD>
<DT><CODE>\vtext {<VAR>text</VAR>}</CODE>
<DD>
The first form of this command places the TeX text <VAR>text</VAR>
vertically with the text reference point at the coordinate
<CODE>(<VAR>x</VAR> <VAR>y</VAR>)</CODE>. The new current position is <CODE>(<VAR>x</VAR>
<VAR>y</VAR>)</CODE>. The second form of this command places the TeX text
<VAR>text</VAR> vertically with the text reference point at the current
position. In both cases, the TeX text is placed in a box and the box
is rotated counterclockwise by 90 degrees about the text reference
point. The text reference point is set with the <CODE>\textref</CODE>
command.
</DL>
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