Blender Git Loki

Disable unfinished code.

Merge branch 'blender2.8' into hair_guides

Initial system for generating guide curves from groom.

Popup for setting hair distribution operator properties.

Fix outdated usage of BLI_task_parallel_range.

New operator for distributing hair follicles for a groom object.

Merge branch 'blender2.8' into hair_guides

Depsgraph cleanup for groom curve cache eval.

Operator for binding groom bundles to scalp regions.

Remove scalp binding from generic depsgraph groom updates, this should be an operator.

Merge branch 'blender2.8' into hair_guides

Disable rebinding during every update to prevent invalidating transform data.

Add back section edges drawing.

Calculate individual curves for each shape vertex.

This avoids overlap which happens on sharp turns when simply extending
the curve linearly from the center. It also simplifies the curve cache
data structure.

Sparser edge drawing for grooms to reduce visual clutter.

Shape binding for groom curves to the scalp mesh surface using face groups.

Face groups are used for now to define the origin of a groom bundle. This
is probably going to be replaced at some point with a dedicated surface
graph/mesh, but is much easier to implement and gives sufficient functionality.

When a face map is selected as the basis of a hair bundle it will update
the curve shape automatically. In the future this should perhaps be an
optional step (user operator) because it destructively changes existing
shapes.

Use existence of a bind value array instead of a flag to detect bound groom data.

Validity flag in bundles to indicate when they are validly bound to the scalp.

This is updated through the depsgraph. Currently just checks for existing scalp
object and vertex groups, eventually will perform actual tracking of the mesh
surface to ensure the groom follows changes of the scalp mesh.

Display the scalp vertex group as the main identifier of bundles in the list.

RNA collection and UI list for groom bundles.