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From: Gerben Wierda <gerben.wierda@rna.nl>
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Subject: Can I share METAPOST vardefs over multiple pages?
Date: Fri, 13 Mar 2020 12:53:46 +0100
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Suppose I have this code:

\startMPpage

vardef MyShape(expr w, h) =3D
   save pth; path pth ;
   save pic; picture pic;
   pth =3D fullsquare xysized (w, h);
   pic :=3D image (
       draw pth;
       % all kind of stuff here
   );
   setbounds pic to pth;
   pic
enddef ;

picture s ; s :=3D MyShape(4cm, 2cm);

draw s;

drawdot center leftboundary  s withpen pencircle scaled 2 withcolor =
green;
drawdot center rightboundary s withpen pencircle scaled 2 withcolor =
blue;
drawdot point .25 along topboundary s withpen pencircle scaled 2 =
withcolor yellow;
drawdot .25[llcorner s, lrcorner s] withpen pencircle scaled 2 withcolor =
magenta;
drawdot origin  withpen pencircle scaled 2 withcolor red;

\stopMPpage

Can I reuse that varied across follow-up MPPages?

G


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<html><head><meta http-equiv=3D"Content-Type" content=3D"text/html; =
charset=3Dus-ascii"></head><body style=3D"word-wrap: break-word; =
-webkit-nbsp-mode: space; line-break: after-white-space;" =
class=3D"">Suppose I have this code:<div class=3D""><br =
class=3D""></div><div class=3D""><font face=3D"Courier New" =
class=3D""><span style=3D"font-style: normal;" class=3D"">\startMPpage<br =
class=3D""><br class=3D"">vardef MyShape(expr w, h) =3D<br =
class=3D"">&nbsp;&nbsp;&nbsp;save pth; path pth ;<br =
class=3D"">&nbsp;&nbsp;&nbsp;save pic; picture pic;<br =
class=3D"">&nbsp;&nbsp;&nbsp;pth =3D fullsquare xysized (w, h);<br =
class=3D"">&nbsp;&nbsp;&nbsp;pic :=3D image (<br =
class=3D"">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;draw pth;<br =
class=3D"">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;% all kind of stuff =
here<br class=3D"">&nbsp;&nbsp;&nbsp;);<br =
class=3D"">&nbsp;&nbsp;&nbsp;setbounds pic to pth;<br =
class=3D"">&nbsp;&nbsp;&nbsp;pic<br class=3D"">enddef ;<br class=3D""><br =
class=3D"">picture s ; s :=3D MyShape(4cm, 2cm);<br class=3D""><br =
class=3D"">draw s;<br class=3D""><br class=3D"">drawdot center =
leftboundary &nbsp;s withpen pencircle scaled 2 withcolor green;<br =
class=3D"">drawdot center rightboundary s withpen pencircle scaled 2 =
withcolor blue;<br class=3D"">drawdot point .25 along topboundary s =
withpen pencircle scaled 2 withcolor yellow;<br class=3D"">drawdot =
.25[llcorner s, lrcorner s] withpen pencircle scaled 2 withcolor =
magenta;<br class=3D"">drawdot origin &nbsp;withpen pencircle scaled 2 =
withcolor red;<br class=3D""><br class=3D"">\stopMPpage<br =
class=3D""></span></font></div><div class=3D""><br class=3D""></div><div =
class=3D"">Can I reuse that varied across follow-up MPPages?</div><div =
class=3D""><br class=3D""></div><div class=3D"">G</div><div class=3D""><br=
 class=3D""></div></body></html>=

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