Blender Git Loki

Use common_view_lib.glsl instead of including the ProjectionMatrix uniform directly in hair shaders.

Fix hair fiber prepass shader and add missin HAIR_SHADER define to compile it.

Fix hair fiber vertex shaders and bring them closer to the particle hair shader.

Merge branch 'blender2.8' into hair_guides

Merge branch 'blender2.8' into hair_guides

Add an offset to ensure hair guide curves start on the scalp in export caches.

Properly set loop and poly indices in mesh samples where possible.

Replace callback for loop weights with a simple array, since these are cached anyway.

Extended hair follicle distribution function that allows geometry filtering.

Replace DerivedMesh with Mesh throughout hair code,

Replace per-vertex sampling weights with per-loop for more control (e.g. face maps).

Fix indexing for hair guide curve drawing.

Fix hair cache update flag combination, have to include dependencies regardless of cache state.

Only pass export cache to lower level draw functions, do export on higher levels.

Remove unused 'Axes' mode for follicle drawing.

Handle hair cache dependencies internally during invalidation to make partial updates more flexible.

Draw mode for hair guide curves.

Fix typo.

Missing forward declaration.

Make Mesh based eval the default for mesh sampling (generators unchanged).