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Turning a closed signal path into a polygon

WestfW

I have some relatively complex shapes drawn with a sequence

of wires and arcs, and closed using the autorouter (if needed):

 

    "wire '%s' (p  %f %f) (p %f %f)\n;", signame, id, a1, od, a1);

    "wire '%s' (p  %f %f) (p %f %f)\n;", signame, id, a2, od, a2);

    "arc '%s' cw (p %f %f) (p %f %f)  (p %f %f);\n", signame,

         id, a1, id, a2, id, a2);

    "arc '%s' ccw (p %f %f) (p %f %f)  (p %f %f);\n", signame,

         od, a1, od, a2, od, a2);

 

(These draw a radial wedge with approx half-circle inside and

outside segments, sorta like you'd want for a "pretty" version

of a touch-sensitive wheel.  But this is actually for a radial

dirod HV electrostatic generator, so smooth curves are important.

See attached image, if it stays attached.)

 

I'd like to turn these into polygons.  The curved wire choices

don't seem to have a variant that works like "arc", so I'm

having trouble making a direct conversion of the code. (am I

missing something there?)

 

Does anyone have a ULP that will turn a closed path of wires

(including arcs) into a polygon?  Even if that means treating

the arcs as a series of straight wire segments?  Something

that works on a particular signal name and stops when it hits

an airwire would be ideal, I think.

 

Is there some other way to do this?

 

Thanks

Bill W

 

Attachments:
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  • Bill Westfield schrieb:

    I have some relatively complex shapes drawn with a sequence

    of wires and arcs, and closed using the autorouter (if needed):

     

       "wire '%s' (p  %f %f) (p %f %f)\n;", signame, id, a1, od, a1);

       "wire '%s' (p  %f %f) (p %f %f)\n;", signame, id, a2, od, a2);

       "arc '%s' cw (p %f %f) (p %f %f)  (p %f %f);\n", signame,

            id, a1, id, a2, id, a2);

       "arc '%s' ccw (p %f %f) (p %f %f)  (p %f %f);\n", signame,

            od, a1, od, a2, od, a2);

     

    (These draw a radial wedge with approx half-circle inside and

    outside segments, sorta like you'd want for a "pretty" version

    of a touch-sensitive wheel.  But this is actually for a radial

    dirod HV electrostatic generator, so smooth curves are important.

    See attached image, if it stays attached.)

     

    I'd like to turn these into polygons.  The curved wire choices

    don't seem to have a variant that works like "arc", so I'm

    having trouble making a direct conversion of the code. (am I

    missing something there?)

     

    Does anyone have a ULP that will turn a closed path of wires

    (including arcs) into a polygon?  Even if that means treating

    the arcs as a series of straight wire segments?  Something

    that works on a particular signal name and stops when it hits

    an airwire would be ideal, I think.

     

    Is there some other way to do this?

     

    Thanks

    Bill W

     

     

    The WIRE (and the POLYGON) command can draw arcs, too.

    You can use the following syntax:

     

      WIRE (x1 y1) +@radius (x2 y2)  for an arc ccw

    or

      WIRE (x1 y1) +@radius (x2 y2)  for an arc cw

     

    It's also possible to use a curve parameter:

     

      WIRE (x1 y2) +/-curve (x2 y2)

     

     

    And the same could be done with a polygon. Of course you can

    add the signalname here. For example:

     

    POLYGON  'signalname' (x1 y1) (x2 y2) +@radius1 (x3 y3)

              (x4 y4) -@radius2 (x1 y1);

     

    HTH

     

     

    --

    Mit freundlichen Gruessen / Best regards

    Richard Hammerl

      CadSoft Support -- hotline@cadsoft.de

      FAQ: http://www.cadsoft.de/faq.htm

     

  • Richard Hammerl wrote:

     

    The WIRE (and the POLYGON) command can draw arcs, too.

    You can use the following syntax:

     

    WIRE (x1 y1) +@radius (x2 y2)  for an arc ccw

     

    Ah.  I think the @radius option will do what I want.  Is

    that form available via mouse-clicks as well?  I can get

    the GUI "arc" command to do what I want, but drawing curves

    as a part of "wire" commands never seems intuitive.  I think

    it's doing "curve" when I want it to do "radius", and I MISS

    that extra click (from "arc") that explicitly sets the radius.

     

    Thanks

    BillW

     

     

  • The WIRE (and the POLYGON) command can draw arcs, too.

     

    This worked quite nicely (using CURVE, rather than radius, in the end),

    once I combined your message with the documentation and actually figured

    out how it was working.

     

    Attachments:
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