bugGNU roff - Bugs: bug #67229, [pic] implement a general...

 
 

bug #67229: [pic] implement a general transformation matrix

Submitter:  None
Submitted:  Fri 20 Jun 2025 09:38:03 PM UTC
   
 
Category:  Preprocessor pic Severity:  1 - Wish
Item Group:  Feature change Status:  Postponed
Privacy:  Public Assigned to:  None
Open/Closed:  Open Planned Release:  None
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Tue 24 Jun 2025 01:46:08 AM UTC, comment #1: 

Post-_groff_ 1.24.

G. Branden Robinson <gbranden>
Group administrator
Fri 20 Jun 2025 09:38:03 PM UTC, original submission:  

Such a matrix would enable rotation, scaling, reflection, and skew.

Duncan Losin says (in bug #66458): "If I recall correctly, polygons are built from the endpoints of lines. I don't think it would be exceedingly difficult to add an option to apply a rotation matrix to the polygon before it is drawn. This would be very useful for blocks too. ... Circuit_macros has a similar method for rotating objects, granted it's built on top of pic rather than built into it.  https://ece.uwate ... h/Circuit_macros/"

Branden replied: "if we supported a rotation matrix, I'd find the temptation irresistible to support a general transformation matrix, supporting scaling, reflection, and skew as well.  Except for scaling, it shouldn't be any harder."

Anonymous

 

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    History

    Follow 2 latest changes.

    Date Changed by Updated Field Previous Value => Replaced by
    2025-06-24 gbranden StatusNone Postponed
    2025-06-20 barx Severity3 - Normal 1 - Wish

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