As of revision 11588, the -eofill command-line option has been implemented. It is currently honored by the xwin, svg, qt, and cairo device drivers.
Normally all the devices associated with the above device drivers use the nonzero fill rule for fills of self-intersecting boundaries like you get for example 27. However, for these devices if you use the -eofill option, e.g., examples/c/x27c -dev xcairo -eofill then plsc->dev_eofill is set to 1, and the various device drivers above use the the evenodd fill rule for self-intersecting boundaries like occur, e.g., in example 27. For the wingcc device, I believe you need to call the SetPolyFillMode Function (http://msdn.microsoft.com/en-us/library/dd145080.aspx) to set up either the oddeven (ALTERNATE) or nonzero (WINDING) fill modes for self-intersecting boundaries. Could somebody with access to windows implement one of the two possible calls of SetPolyFillMode depending on the value of pls->dev_eofill (set by the -eofill option)? If Windows uses the same fill algorithm as X (which is entirely possible since X has been around for years and anybody can use that MIT-licensed code for virtually anything they like), then that ALTERNATE (evenodd) fill mode (currently the default when SetPolyFillMode is not called) would show terrible-looking results (no fills at all for pages 11-13, many missing fill regions and some regions filled that shouldn't be for the subsequent pages) for the fill pages of example 27. For the conditions stated, the WINDING fill mode would show much better looking results (good results for pages 11-13, modest but incorrect results [asymmetries] for pages 14 and higher). Alan __________________________ Alan W. Irwin Astronomical research affiliation with Department of Physics and Astronomy, University of Victoria (astrowww.phys.uvic.ca). Programming affiliations with the FreeEOS equation-of-state implementation for stellar interiors (freeeos.sf.net); PLplot scientific plotting software package (plplot.org); the libLASi project (unifont.org/lasi); the Loads of Linux Links project (loll.sf.net); and the Linux Brochure Project (lbproject.sf.net). __________________________ Linux-powered Science __________________________ ------------------------------------------------------------------------------ Free Software Download: Index, Search & Analyze Logs and other IT data in Real-Time with Splunk. Collect, index and harness all the fast moving IT data generated by your applications, servers and devices whether physical, virtual or in the cloud. Deliver compliance at lower cost and gain new business insights. http://p.sf.net/sfu/splunk-dev2dev _______________________________________________ Plplot-devel mailing list Plplot-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/plplot-devel
