Blender Git Loki

Merge branch 'master' into alembic_basic_io

Minor UI fix.

Add a points/particles reader.

Similarly to the hair being written as curves, this does not create a
particle system, but rather reads the points as Mesh which only has
vertices.

Cleanup: de-duplicate modifier addition.

Add a flag to indicate that a cache is made of sequence of file or not.

Quiet warning.

Avoid creating a new DerivedMesh if the vertex count does not change.

Merge branch 'master' into alembic_basic_io

Cleanup.

Remove unused function.

Cleanup: de-duplicate object lookup functions.

Add a deformVert callback to the modifier to handle curve streaming.

Initial support for streaming meshes with a varying number of
vertices.

This is achieved by making use of a new modifier since the mesh cache
modifier cannot modifiy the number of vertices in a mesh. This modifier
also brings support to read file sequences.

Merge branch 'master' into alembic_basic_io

Cleanup: redundant check.

Ass some properties to the written hair samples.

Cleanup, make API a bit more consistent.

Add support to export particles.

Avoid looking up parent's matrix if the object is not a locator or a
leaf transform.

Partially revert some previous commits:

- Avoid double matrix multiplication.
- Also build transforms with no children as empties.

They wery bringing some regressions.