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<!doctype html public "-//w3c//dtd html 4.0 transitional//en">
<HTML>
<HEAD>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
<meta http-equiv="Content-Style-Type" content="text/css">
<!--meta http-equiv="Content-Script-Type" content="text/javascript"-->
<TITLE>SVG Examples: Circuit_macros Version XXX</TITLE>
<meta name="keywords" content="HTML"
content='Circuit elements, basic circuits, logic circuits and other diagrams,
electric circuits, resistor, capacitor, inductor, diode, sources, amplifier,
integrator, fuse, switch, antenna, opamp, transformer, relay, contact, jack,
plug, FET, UJT, thyristor, bipolar transistor, nport, windings, timer,
optical isolator, rectifier, bistable, oscillator, CMOS, MOSFET, power supply,
NAND gate, controlled source, synchronous machine, digital circuit, signal-flow
graph, latch, decoder, flipflop, full adder, logic diagram, crossbar switch,
dimensioning, control system, graph, RGB colors, recursion, binary tree,
flowcharts, picture overlay, ASME Y14.5' >

<style type="text/css">
</style>
<link rel="shortcut icon" href="../Circuit_macros.ico" type="image/x-icon" />
</HEAD>

<!-- ---------------------------------------------------------------------
define(`ifinstr',`ifelse(`$2',,`$1',index(`$1',`$2'),-1,
 `ifinstr(shift(shift(shift($@))))',`$3')')

define(`m4tt',`<g style="font-family:monospace">')

define(`cfig',`
<p>

<!--[if lte IE 8]><embed src="$1.svg" sinclude($1.siz)><![endif]-->

<!--[if gte IE 9]>
<object dx="4" data="$1.svg" sinclude($1.siz) type="image/svg+xml" class="img">
  </object> <![endif]-->

<!--[if !IE]><!-->
<object data="$1.svg" sinclude($1.siz) type="image/svg+xml" class="img">
  </object> <![endif]-->

<br><br>
ifelse(`$2',,,`
<a href="$1.txt" TYPE="text/plain" TARGET="_blank" alt="$1">$1.m4:</a>
`$2' changecom(,)&`#'8194;changecom(`#')')

</p>
ifinstr(`$3',y,,`<hr>')')

--------------------------------------------------------------------- -->

<BODY>
<table cellpadding="0" cellspacing="0"
 width="700px" border="0" align="center" ><tr><td>

<H2>SVG Circuit_macros examples, Version XXX</H2>
<hr>

<p>
  This file shows diagrams in .svg format;
  <A HREF="examples.html">png</A>
  versions are also available.
  The PDF equivalent can be found in examples.pdf of the distribution.
</p>

<p>
The diagrams shown below have been adapted from the Circuit_macros
examples in order to test the svg output of dpic.  Generating svg line
art is straightforward, but TeX, LaTeX, and related word
processors do not produce svg. Either less-sophisticated text formatting
must be employed or an
  <A HREF="https://en.wikibooks.org/wiki/LaTeX/Export_To_Other_Formats">
   intermediate format</A>
such as pdf can be
produced, followed by an additional processing step to convert to svg.
Two possibilities for the latter are
  <A HREF="https://www.ctan.org/pkg/dvisvgm">dvisvgm</A>
and
  <A HREF="https://github.com/dawbarton/pdf2svg">pdf2svg</A> although
there may be font-related issues for some diagrams.
<br>
Many circuit and similar diagrams intended for the web do not
require sophisticated labels, however; the examples shown below might
be representative.
</p>
<p>
  Click on the link to view the source of each diagram.
</p>
<hr>
<p>
There are a number of other issues:
<ul>
  <li> Embedding .svg files in html documents with the &lt;embed&gt; or
    &lt;object&gt; tag seems to be a perennial issue.
  <li> This file has been tested mainly by using Firefox.
  <li> The Adobe reader apparently requires a line of the form
  <br> &lt;embed src="figure.svg" width="x" height="y" type="image/svg+xml"
     /&gt;
   This means that the html file has to contain dimension
   information for each figure, whereas Firefox can
   determine the figure size
   from the &lt;svg ... object.  Currently, dpic includes a comment line
   giving reasonable dimensions in pixels but this has to be insterted into
   the &lt;embed or &lt;object line.  A makefile does it easily but
   otherwise this could be tedious.
  <li> The default font face is not specified in all of these diagrams but is
   inherited from the enclosing document, so the appearance of labels can
   differ depending on the browser.  Some of these diagrams set the font at
   the beginning of the diagram source.
  <li> The &lt;svg tag may require modification
   from the default used for this test.  Dpic might be modified to
   allow the generation of custom headers but that has not been done.
  <li> Diagrams such as these contain text labels
   that have to be treated differently from the LaTeX-compatible versions.
   Apparently there is no direct way to know the bounding box of arbitrary svg
   text.
   <!-- text, as discussed
   <a href="http://www.aditus.nu/jpgraph/jpg_svg.php" TARGET="_blank">here,</a>
   for example. -->
   Consequently, text placement is approximate and may require
   manual adjustment.
   Rather than patch the original source files for svg production, edited copies
   have been used.  The configuration file svg.m4 read by m4
   prior to libcct.m4 contains the following macros defined for svg.
   Others could be defined to exercise some of the media capabilties of svg.
   They are subject to change:
  <ul>
    <li>
      m4tt`'svg_font(</g>font-face,nominal size[:dptextratio],textoffset,
         dpic commands`'m4tt)</g>:
         Change font face, size, textratio and dpic textoffset parameters.
         Change font face and dpic m4tt`'textht</g>, m4tt`'dptextratio</g>,
         and m4tt`'textoffset</g> parameters.
         If arg4 is blank, the font is changed and
         requires m4tt`'command "&lt;/g&gt;"</g> to cancel the font change.
         <br>
         Note:
         Nominal height = text height in drawing units; actual height =
         nominal ht x m4tt`'dptextratio</g>.
         <br>
         Examples: <br>
         m4tt`'svg_font(Times)</g><br>
         m4tt`'svg_font(Times,14bp__)</g><br>
         m4tt`'svg_font(sans-serif,14bp__:0.71)</g><br>
         m4tt`'svg_font(Times,11bp__,1bp__,"text" at A)</g><br>
         m4tt`'svg_font(font-family="Times")</g><br>
         m4tt`'svg_font(font-family="Times" font-style="italic")</g><br>
         m4tt`'svg_font(style="font-family:Times; font-style:italic")</g>
    <li>m4tt svgfontratio(</g>font name`'m4tt)</g>;
         Reasonable m4tt`'dptextratio</g> value for common fonts, used
         by m4tt`'svg_font</g>.
    <li>m4tt svg_tspan(</g>text attributes, text`'m4tt)</g>;
      e.g. m4tt`'svg_tspan(font-style="italic" font-size="75%",XYZ)</g>
    <li>m4tt svg_it(</g>text`'m4tt)</g>: for italics
    <li>m4tt svg_tt(</g>text`'m4tt)</g>: for monospace (courier)
    <li>m4tt svg_sf(</g>text`'m4tt)</g>: sans-serif (Helvetica)
    <li>m4tt svg_norm(</g>text`'m4tt)</g>: for normal text
    <li>m4tt svg_bf(</g>text`'m4tt)</g>: for bold face
    <li>m4tt svg_small(</g>text, percent`'m4tt)</g>:
        to set a smaller text size, default 66
    <li>m4tt svg_fsize(</g>text, percent`'m4tt)</g>:
        for setting larger or smaller text size, default 100
    <li>m4tt svg_sub(</g>text, size percent, y displ, x displ`'m4tt)</g>:
        subscript
    <li>m4tt svg_ul(</g>text`'m4tt)</g>: underlined text
    <li>m4tt svg_ol(</g>text`'m4tt)</g>: overlined text
    <li>m4tt svg_sup(</g>text, size percent, y displ, x displ`'m4tt)</g>:
        superscript
    <li>m4tt svg_hat(</g>character`'m4tt)</g>: circumflex-accented character
    <li>m4tt svg_frac(</g>numerator[:wid], denominator[:wid]`'m4tt)</g>:
        basic fraction, wid in drawing units
    <li>m4tt svg_rot(</g>degrees, "text" [at position]`'m4tt)</g>:
        Rotate text degrees (default 90) ccw.
        Requires m4tt`'svg_rot_init(</g>filename`'m4tt)</g> and the source
        must be processed twice.
    <li>m4tt svg_rot_init(</g>filename`'m4tt)</g>:
        filename is the basename of the output of
        m4tt`'dpic -v filename.pic > filename.svg`'m4tt
    <li>m4tt svg_symbol(</g>text`'m4tt)</g>: allow quoted pound sign in text,
          e.g., m4tt`'svg_symbol(10&&#96;&#35;&#39;176;)</g> produces 10&#176;
    <li>m4tt svgLink(</g>URL, drawing object, m4tt[B])</g>:
      link to external file using
      &lt;a xlink:href=...&gt;...&lt;/a&gt; (default is
      m4tt`'target="_blank"</g> unless
      arg 3 = B)
    <li>m4tt svgLinkString</g> as above but for strings attached to objects
    <li> Greek and other symbols:

<!--
  Reference:
  https://en.wikipedia.org/wiki/List_of_XML_and_HTML_character_entity_references
  and
  https://www.toptal.com/designers/htmlarrows/math/
  -->
<table cellpadding="2" cellspacing="0" width="75%" >
<tr>
<td width="10%"> m4tt svg_alpha</g> <td align="left"> changecom(,)&`#'945;changecom(`#')
<td width="10%"> m4tt svg_beta</g> <td align="left"> changecom(,)&`#'946;changecom(`#')
<td width="10%"> m4tt svg_Gamma</g> <td align="left"> changecom(,)&`#'915;changecom(`#')
<td width="10%"> m4tt svg_gamma</g> <td align="left"> changecom(,)&`#'947;changecom(`#')
<td width="10%"> m4tt svg_Delta</g> <td align="left"> changecom(,)&`#'916;changecom(`#')
<td width="10%"> m4tt svg_delta</g> <td align="left"> changecom(,)&`#'948;changecom(`#')
<td width="10%"> m4tt svg_epsilon</g> <td align="left"> changecom(,)&`#'949;changecom(`#')
<td width="10%"> m4tt svg_zeta</g> <td align="left"> changecom(,)&`#'950;changecom(`#')
</tr>
<tr>
<td width="10%"> m4tt svg_eta</g> <td align="left"> changecom(,)&`#'951;changecom(`#')
<td width="10%"> m4tt svg_Theta</g> <td align="left"> changecom(,)&`#'920;changecom(`#')
<td width="10%"> m4tt svg_theta</g> <td align="left"> changecom(,)&`#'952;changecom(`#')
<td width="10%"> m4tt svg_iota</g> <td align="left"> changecom(,)&`#'953;changecom(`#')
<td width="10%"> m4tt svg_kappa</g> <td align="left"> changecom(,)&`#'954;changecom(`#')
<td width="10%"> m4tt svg_Lambda</g> <td align="left"> changecom(,)&`#'923;changecom(`#')
<td width="10%"> m4tt svg_lambda</g> <td align="left"> changecom(,)&`#'955;changecom(`#')
<td width="10%"> m4tt svg_mu</g> <td align="left"> changecom(,)&`#'956;changecom(`#')
</tr>
<tr>
<td width="10%"> m4tt svg_nu</g> <td align="left"> changecom(,)&`#'957;changecom(`#')
<td width="10%"> m4tt svg_Xi</g> <td align="left"> changecom(,)&`#'926;changecom(`#')
<td width="10%"> m4tt svg_xi</g> <td align="left"> changecom(,)&`#'958;changecom(`#')
<td width="10%"> m4tt svg_Pi</g> <td align="left"> changecom(,)&`#'928;changecom(`#')
<td width="10%"> m4tt svg_pi</g> <td align="left"> changecom(,)&`#'960;changecom(`#')
<td width="10%"> m4tt svg_rho</g> <td align="left"> changecom(,)&`#'961;changecom(`#')
<td width="10%"> m4tt svg_Sigma</g> <td align="left"> changecom(,)&`#'931;changecom(`#')
<td width="10%"> m4tt svg_sigma</g> <td align="left"> changecom(,)&`#'963;changecom(`#')
</tr>
<tr>
<td width="10%"> m4tt svg_tau</g> <td align="left"> changecom(,)&`#'964;changecom(`#')
<td width="10%"> m4tt svg_upsilon</g> <td align="left"> changecom(,)&`#'965;changecom(`#')
<td width="10%"> m4tt svg_Phi</g> <td align="left"> changecom(,)&`#'934;changecom(`#')
<td width="10%"> m4tt svg_phi</g> <td align="left"> changecom(,)&`#'966;changecom(`#')
<td width="10%"> m4tt svg_chi</g> <td align="left"> changecom(,)&`#'967;changecom(`#')
<td width="10%"> m4tt svg_Psi</g> <td align="left"> changecom(,)&`#'936;changecom(`#')
<td width="10%"> m4tt svg_psi</g> <td align="left"> changecom(,)&`#'968;changecom(`#')
<td width="10%"> m4tt svg_Omega</g> <td align="left"> changecom(,)&`#'937;changecom(`#')
</tr>
<tr>
<td width="10%"> m4tt svg_omega</g> <td align="left"> changecom(,)&`#'969;changecom(`#')
<td width="10%"> m4tt svg_micro</g> <td align="left"> changecom(,)&`#'956;changecom(`#')
<td width="10%"> m4tt svg_ohm</g> <td align="left"> changecom(,)&`#'937;changecom(`#')
<td width="10%"> m4tt svg_lt</g> <td align="left"> changecom(,)&`#'60;changecom(`#')
<td width="10%"> m4tt svg_gt</g> <td align="left"> changecom(,)&`#'62;changecom(`#')
<td width="10%"> m4tt svg_leq</g> <td align="left"> changecom(,)&`#'8804;changecom(`#')
<td width="10%"> m4tt svg_geq</g> <td align="left"> changecom(,)&`#'8805;changecom(`#')
<td width="10%"> m4tt svg_prime</g> <td align="left"> changecom(,)&`#'8242;changecom(`#')
</tr>
<tr>
<td width="10%"> m4tt svg_backsl</g> <td align="left"> changecom(,)&`#'92;changecom(`#')
<td width="10%"> m4tt svg_pound</g> <td align="left"> changecom(,)&`#'35;changecom(`#')
<td width="10%"> m4tt svg_comma</g> <td align="left"> changecom(,)&`#'44;changecom(`#')
<td width="10%"> m4tt svg_lparen</g> <td align="left"> changecom(,)&`#'40;changecom(`#')
<td width="10%"> m4tt svg_rparen</g> <td align="left"> changecom(,)&`#'41;changecom(`#')
<td width="10%"> m4tt svg_circ</g> <td align="left"> changecom(,)&`#'710;changecom(`#')
<td width="10%"> m4tt svg_deg</g> <td align="left"> changecom(,)&`#'176;changecom(`#')
<td width="10%"> m4tt svg_grave</g> <td align="left"> changecom(,)&`#'96;changecom(`#')
</tr>
</table>
<table cellpadding="2" cellspacing="0" width="75%" >
<tr>
<td width="8%"> m4tt svg_emsp</g> <td width="50px" align="left"> |changecom(,)&`#'8195;changecom(`#')|
<td width="8%"> m4tt svg_ensp</g> <td width="50px" align="left"> |changecom(,)&`#'8194;changecom(`#')|
<td width="8%"> m4tt svg_thinsp</g> <td width="50px" align="left"> |changecom(,)&`#'8201;changecom(`#')|
</tr>
</table>

  </ul>
  <li> Inkscape: It may be efficient to define elements by macro and to
    place them using a wysiwyg graphics editor.  A draft page intended
    for Inkscape is included.  A reasonable variety of elements is defined
    but many more could be added and they should be customized for
    particular applications.  Adjustments may also have to be made to
    obtain the proper snap-to actions.
  <li> Link experiments: Click on the resistor or source of quickSVG
    to go to external
   files in new windows.  Click on "n-port" in NportSVG to replace the diagram
   and then "back" to return.
  <li> Some of the assumptions used to create this draft may be
   na&`#'239;ve.
   Comments are welcome.
</ul>

<hr>

cfig(XXXXX)

</td>
</tr>
</table>
</BODY>
</HTML>