While trying to create a coarse cross-hatch pattern on a plot, I ran into an issue with plpat. When plpat is called, it does not set plsc->patt, the plot stream's fill-pattern flag. This flag indicates that filled polygons should be drawn with the defined pattern rather than with a solid color. It took me a while to track the source of this problem down because the second page of PLplot's example 15 uses plpat successfully. The reason this works is because plpsty is called with a non-zero value before any calls to plpat are made. plpsty sets the plsc->patt flag, so the changes made my plpat propagate along to subsequent fill calls.
The simple fix for this problem is to set the plsc->patt flag in c_plpat. My only concern is that this change to plpat may significantly alter the output of programs using PLplot which are relying on this seemingly incorrect behavior. Is it enough to change plpat to set plsc->patt and add an entry in the release notes explaining the change? Another relatively minor issue is that the fill pattern can not be reset with a call to plpat. plpsty(0) must be called in order to go back to drawing with filled polygons. I have filed a bug report here: https://sourceforge.net/tracker/?func=detail&aid=3366397&group_id=2915&atid=102915 I'm happy to implement the fix once a decision is made on the best approach. Hez ------------------------------------------------------------------------------ AppSumo Presents a FREE Video for the SourceForge Community by Eric Ries, the creator of the Lean Startup Methodology on "Lean Startup Secrets Revealed." This video shows you how to validate your ideas, optimize your ideas and identify your business strategy. http://p.sf.net/sfu/appsumosfdev2dev _______________________________________________ Plplot-devel mailing list Plplot-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/plplot-devel
