Blender Git Loki

Depsgraph: don't get time if not needed

Depsgraph: Need relation between IK solver and object transform

IK solver ode needs to know object transform matrix so added relation for that.

Currently the relation is between object transform and pose components, so all
pose eval evaluation init happens nicely. In the future we might want to redirect
this relation to solver operation itself.

Merge branch 'master' into depsgraph_refactor

Only perform the inner loop over one group of connected paths in macros.

This allows more customized handling of path drawing in the outer loop
(needed for drawing end caps).

Nicer iterating over pairs of connected neighboring child paths.

Removed parent path drawing code for hulls, this is never used anyway.

Merge branch 'master' into depsgraph_refactor

More cleanup, simplied set_clnor funcs, reworked mix feature of setsplinor modifier

Now, `BKE_mesh_normals_loop_custom_set()` & co do not take a factor value anymore.
It could make perfomances slightly better, but it was adding some complexity and fuzzyness
in an area that do not need that. So now, caller code is expected to handle
mixing itself, if needed.

And SetSplitNormal modifier now has a real mixing handling, quite similar to
the one of txdata.

Calculate normals and use smooth shading in the strand direction for
child hulls.

Note that the perpendicular direction around the hair bundles is not
smooth-shaded. Smooth shading doesn't make as much sense there because
large angles are common in this direction and give awkward shading
results.

Disabled fallback path drawing for now, is currently nested inside the
OpenGL immediate mode calls.

Don't draw 2-sided flat hulls, this just gives ugly Z fighting.

Ignore paths with segments == -1, this is used to indicated hidden
children.

Completed the convex hull calculation for child paths.

Parent index is only stored for hull children as a means of identifying
them in the drawing code.

Use line drawing as a fallback if only one child is assigned to a parent.

Simple immediate-mode OpenGL drawing for convex child hair hulls.

Fix for recent particle drawing commit, need to update the local draw
data variable after changing the buffer.

Sorting of child particles by primary parent and offset in hair space.

This is a prerequisite for constructing the convex hull of child paths
around a parent.

More code cleanup to avoid crazy huge and messy particle functions.

New draw mode 'HULL' for hair drawing.

Not implemented yet, currently uses just the child path drawing.

Cleanup: Make path update flag tests a little bit more understandable.