This is UV barycentric interpolation failing for triangles where vertices are
colinear in screen space. To fix this, we detect this early on so we do the
interpolation on edges instead of triangles.
Such triangles will never be painted on unless we have occlusion and culling
off (since, arguably they are self occluded and almost back-facing).
The code still does not fill the whole area but this can be checked separately.
It should now fill the whole mesh with color even if parts of it are
outside the screen - still need to be in fron of the camera though.
Thanks @Campbell for the trick :)
It did not fully support cases when setting border from a cropped render result
and it's not totally clear how it should behave. So for now just do nothing and
inform users about this.
This is yet another issue with framebuffers. There are two issues: We
need the framebuffer fully bound to check for completeness and when we
bind a depth texture as frame buffer we need to disable read/write.
Removing edge-hit-doubles could incorrectly de-duplicate intersections between different edges.
Gave noticeable errors cutting through geometry that overlapped exactly.
There was some stupidness in the way how tracks are synchronized from the job
to actual DNA data leading to all sort of weird and wonderful failures again.
Writing to the tracks was already inside the lock section, but
reading was not. This could have lead to race condition leading
to all sorts of weird and wonderful artifacts.
Actually, append/link *is* converted/updated, issue here is IPO-to-FCurves
code is not called from our do_version code, but later, directly from BKE_blender's
setup_app_data. This is bad but not easily fixed it seems, so for now
keep a warning in this case.
thanks Sergey for the headup.
Can be considered TODO but it's not bad to support either. Also added
RNA api to get aspect ratio of assigned UV image - returns aspect
corrected image dimensions so needs adjustments for uv editing.
There was a differences between how Cycles and BI treats Normal shader:
- Different normal direction assumption
- Different policy about vector normalization
Previous idea of trying to use single function and flip the output if
needed becomes more tricky, so i've just added new GLSL function which
corresponds to how Cycles deals with the Normal shader.
This hack should not be needed here, quoting Sergey, the actual issue comes from BKE_object_handle_update_ex,
which is calling BKE_object_where_is_calc_ex when it shouldn't.
Propper fix is depsgraph refactor topic, though.
