Jae-Joon Lee wrote: > My understanding is that MOVETO in the middle of the path serve as a > CLOSEPOLY when the path is filled. So, I don't think it actually > matters how holes are connected each other. And as you can see, the > largest hole is actually composed of three different polygons that > overlaps, and the funny pattern is due to this overlaps. > > The attached is my attempt to solve this problem. "remove_cuts" > removes the cuts in a way that a hole becomes a single closed polygon, > although I'm not sure if the code is rigorous enough. It seems to work > okay for your sample data. It assumes that cuts are always vertical > lines but this assumption can be dropped if we do bookkepping of all > the path segments. > I hope the code turns out to be work okay in general. > > Ideally, it would be better if something similar would be done inside > the contouring routine.
An implementation of the path conversion is now in the reorder() function in cntr.c; as of svn r7422, it is used by contourf (and by contour, although for line contours it is merely copying data into the output arrays). In addition to the contourf_demo.py, I have tested it with basemap's simpletest.py and with random data, without detecting any obvious artifacts. More testing is welcome, of course. Eric > > -JJ > > > > On Thu, Aug 6, 2009 at 1:58 PM, Eric Firing<efir...@hawaii.edu> wrote: >> Mike, >> >> When I eliminate the cuts from filled contour paths, I do find pathological >> cases where the filling works correctly with the cuts in place, but not >> without them. Attached are a data file and a script to plot it, >> illustrating the problem. Is this due to a known limitation of filled >> paths? In the example, the top two holes are connected to the lower hole, >> instead of being connected directly to the outer boundary of the filled >> region. Is this illegal? If so, I think we are stuck, because rearranging >> the paths that cntr makes to eliminate this type of case would likely be >> very difficult. >> >> Eric >> >> ------------------------------------------------------------------------------ >> Let Crystal Reports handle the reporting - Free Crystal Reports 2008 30-Day >> trial. Simplify your report design, integration and deployment - and focus >> on >> what you do best, core application coding. Discover what's new with >> Crystal Reports now. http://p.sf.net/sfu/bobj-july >> _______________________________________________ >> Matplotlib-devel mailing list >> Matplotlib-devel@lists.sourceforge.net >> https://lists.sourceforge.net/lists/listinfo/matplotlib-devel >> >> >> >> ------------------------------------------------------------------------ >> ------------------------------------------------------------------------------ Let Crystal Reports handle the reporting - Free Crystal Reports 2008 30-Day trial. Simplify your report design, integration and deployment - and focus on what you do best, core application coding. Discover what's new with Crystal Reports now. http://p.sf.net/sfu/bobj-july _______________________________________________ Matplotlib-devel mailing list Matplotlib-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-devel
