get_keyframe_extents() would add an extra frame in case of mono-key fcurves in selected set...
Now do the 'not same start/end frames' check later, and also use floor/ceil instead of round
(we want to start at frame 3 if first key is at frame 3.8, reversed-same goes for end frame).
Since data transfer when called from this tool has reversed behavior (it transfers **towards**
active object, as previous tool), we have to also reverse source/destination layers selection options.
Also fix 'reverse' option being saved, otherwise calling regular operator after 'transfer weights'
would stay in reverse mode, ugly!
Root of the issue was, preview generator was filling ID preview with unsigned int,
when RNA only knows of signed integers (and thus generates a python exception
when converting uint outside of int range)...
Using the brand new and much simple float pixels accessor to PreviewImage now.
Why this was working perfectly OK (it seems...) under Linux, and why error (py exception)
was so badly and misleadingly reported on Windows, remains pitch black mystery to me.
Raw int pixels can be nice in some cases (much less memory used), but converting to/from float values
(as e.g. expected by/from Image) is not simple in py, error prone and rather slow.
triangles.
This made the normal-related artifacts of projection painting much more
apparent. Now we do culling based on
whole polygons. Pure backface culling still uses individual
triangles.
painting.
Also system added a brush every time it found no paint brush in the
system which is not what we would want.
Solution:
* Brush panel stays visible always, regardless of whether there is a
brush or not.
* We search for first available brush when we find no brush in paint
struct instead of always generating a new one.
* Generating and searching for a brush take a mode argument now. Needed
some refactoring to users of BKE_paint_init as well.
* Did some style cleanups for paint mode enums.
Patch is big but it's mostly argument refactoring.
