[matplotlib-devel] changes to collections, etc.

[Eric F. <ef...@ha...>]

I have commited a set of changes to _transforms, collections, quiver, 
contour, and numerix as part of a move toward taking advantage of the 
efficiency of numerix arrays in place of sequences of tuples.  The 
changes are outlined very briefly in CHANGELOG and API_CHANGES.

Changes in clabel are hacks, and may make it less efficient rather than 
more, but I expect this to be temporary; I needed to simply make it work 
with the other changes.

Where breakage will occur is any place in user code that expects the 
collection segments or vertices to be lists of tuples and tries to 
append to the list, for example.  I don't know of any way to make the 
move towards use of arrays without this problem cropping up; I hope it 
is considered tolerable.

Eric