This uses pythons GC so its no overhead during runtime but makes removing ID's slower.
Commented definition 'USE_PYRNA_INVALIDATE_GC' for now, so no functional change.
* For rendering every object's inverse matrix "ob->imat" needs to
be in render view coordinates, but for drawing in 3d view it needs
to be in global coordinates. Originally (way back in historical
times) ob->imat was only used for rendering, but over the years
other uses came up too. Before 2.5 this wasn't a problem as
rendering was a totally blocking operation, but with the new
"interactive ui while rendering" the problems started. Basically
any update that redrew the 3d view while rendering (like rotating
the scene with mouse) updated the inverse matrix into global
coordinates thus invalidating it for the render, leading to all
kinds of strange discontinuities with textures and volumetrics.
* Problems were very easy to achieve using orco/object coordinates
for pretty much any textures (bump, point density, volume, sky),
for examples see bug reports 24906 and 25229. Render baking normals
in object coordinates was wrong most of the time too.
* Now there is a separate inverse matrix ob->imat_ren that's
calculated at the beginning of rendering and is used in all places
inside render code where it's needed. This way the original ob->imat
can change at will during rendering without causing problems.
- use own OrderedDictMini class, pythons collections.OrderedDict is overkill, 179 sloc. replaced with own, 11 lines.
- remove code which stored the class file & line per RNA subclass, this was useful but would raise its own exception every time to generate a stack trace to get the class info so we could use of the class failed to register. the class stores its module & name which can be enough to find where it was defined.
Finally, the Blender icon can be used for the splash screen menu entry, on own todo for almost 1 year!
Thanks to elubie for fixing this in the code. :)
* Moved ICON_BLENDER away from (0,0) spot in blenderbuttons, since ICON_BLENDER=0 define is conflicting ICON_NULL define as well as with logic checks for nonzero icon id.
* This solved bug where ICON_BLENDER can't be set from Python as well as when using new UI functions from within Blender.
- Invalid shape when deformation mesh was disabled befoe undoing
- Crash when deformation modifier was enabled before undoing
Still got problems with undoing multires changes when toggling modifiers.
