Blender Git Loki

Little utility macros getter/setter compiler hints

Add WorkSpaceHook struct as bridge between workspace and window-manager

This way we can keep workspace and window-manager data separate and
further steps are made a bit easier.

Cleanup

Change name and organize position of functions

OpenGL: wm_gesture uses new imm mode

D2376 by @ianwill, part of T49043
review by @merwin

Box select, circle select, etc. Introducing the dashed-line shader! See D2376 for more info.

Fix T50757: Alembic, assign imported materials to the object data
instead of to the object itself.

Simplification and comments

`dm->release(dm)` accidentally removed

I do not know if this call is really necessary, but in doubt I'll leave it as it is

Merge branch 'snap_system_clip_planes' of git@git.blender.org:blender.git into snap_system_clip_planes

# Conflicts:
# source/blender/editors/transform/transform_snap_object.c

Fix crash due to dereferenced array od edges and clean debug printfs

Fix fix for realloc!

Fix building on linux (gcc).

Fix MEM_reallocN use

Innitial commit: Snap system - Adds Clip Plan support and simulates occlusion

The main alterations here were made in the transform_snap_object.c file.
The main change add the "clip plans" of the `rv3d->clip` to bypass the snap to unseen elements. This solution continues to take advantage of the BVH.

Since we can use clip planes, we can now simulate occlusion (ie ignore what is behind a face), first a raycast is made to get the normal and coordinates of the polygon of the hit. Then a plane is created just behind the polygon, thus ignoring everything that is behind it when a snap is made for vertex or edge.

This is not the ideal occlusion solution, but it is already a good step to get the perfect occlusion test.

In addition to this change other changes were made:

Now snap_to is a flag that can indicate whether the snap is made for one, two or all elements at the same time (this will not change much for the user, the only operator using mixed snap is the ruler) ;
if the object is in wireframe mode or Bounding Box, they are ignored in snap to face (good idea?);
use the BVHTree of looptris to snap vertices and edges (saves memory);

Alembic: simplified conditional statements

Alembic import: nicer progress updates

Alembic import: fixed bug where local matrix from Alembic was used as object matrix

Also renamed AbcObjectReader::readObjectMatrix to
setupObjectTransform, as it does more than just reading the object
matrix; it also sets up an object constraint if the Alembic Xform is
animated.

Alembic import: separated reading matrix and getting the appropriate Xform object

Also added a bit better error reporting, instead of silently ignoring
invalid Alembic data.

Alembic import: don't crash on instances

Importing instances (i.e. Alembic objects that reference instance
sources rather than contain data for themselves) isn't supported yet, but
with this change at least it doesn't crash Blender.

Alembic import: be more lenient towards unknown object types.

Alembic is an interchange and caching format, that can contain custom
object schemas. Blender shouldn't crash (because of failing asserts) just
because it doesn't know such an object type.

Alembic: don't call object.getFullName() multiple times.