The way we do the alpha blending, the output value is (alpha * v1) +
((alpha-1) * v2). All of the artists are compsited down on top of a white
background so the compositing is not commutative.
(a * .5) + (.5 * (b * .5 + .5)) =/= (b * .5) + (.5 * (a * .5 + .5))
On Mon, Nov 23, 2015 at 1:55 PM
Maybe the issue is with the colormap not having an alpha? Does this
http://stackoverflow.com/questions/10127284/overlay-imshow-plots-in-matplotlib
help?
Otherwise, you might file a bug at
https://github.com/matplotlib/matplotlib/issues/new
-Sterling
On Nov 20, 2015, at 4:46PM, Brian Merchant
Hi all,
In order to get circles such that their coloring is radially symmetric,
with center being the darkest, and exponential decay in color as one moves
farther away from the center along the radius, I used imshow with clip_path
using Circle patches.
Here's a toy script that overlaps two such
