Eric Firing wrote: > Ryan May wrote: >> Hi, >> >> In looking over trying to support masked arrays in wind barbs, I noticed >> a problem. I had originally copied the model of quiver, wherein masked >> arrays are supported for U,V, and color, but not for X,Y. This stems >> from the seemingly nonsensical nature of masking a location. However, >> if nothing is drawn for a location X,Y where U,V are masked, this >> would seemingly lead to a problem where the locations and the things >> to be drawn get out of phase. Am I missing something here? Eric, did >> I miss some magic somewhere in quiver that handles this? >> > There is no magic; we are not compressing or otherwise extracting the > valid values, but are leaving the masking of U and V in place through > the creation of the arrow vertices. It is the PolyCollection.draw() > method that is then handling the masking. > > Now, having said that, and having traced through the code, I am not at > all sure that everything in collections is still working correctly as > described; I will have to look a bit more. > > Note that the path module itself can handle masking now, so masked > arrays sometimes get passed all the way through to it.
So you mean the list/array of vertices can contain masked values? > > Quiver and windbarb could use the axes.delete_masked_points function > right at the start, and this might be a good change to make, except that > it is inconsistent with using the present set_UVC method to update > arrows at constant locations. delete_masked_points() looks to me like a sane way to go. I'll update my masked handling to use this. Ryan -- Ryan May Graduate Research Assistant School of Meteorology University of Oklahoma ------------------------------------------------------------------------- This SF.Net email is sponsored by the Moblin Your Move Developer's challenge Build the coolest Linux based applications with Moblin SDK & win great prizes Grand prize is a trip for two to an Open Source event anywhere in the world http://moblin-contest.org/redirect.php?banner_id=100&url=/ _______________________________________________ Matplotlib-devel mailing list Matplotlib-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-devel
