Blender Git Loki

Depsgraph: Cleanup of util headers

Depsgraph: Use shorter prefix for util headers

Depsgraph: Move PChan map to a builder folder as well

Depsgraph: Cleanup of header files, amke them easier to read

Depsgraph: Use more explicit path to include headers

Makes it easier to see where exactly file is coming from, additionally
should help compiler to find headers quicker.

Depsgraph: Move transitive reduction and cycles solver to builder folder

This algorithms are only used for graph building and having them in util
was causing some bad level includes from util/ to intern/.

Depsgraph: Remove file with just a single debug define

Granularity is good, but it's a bit too extreme :)

Depsgraph: Move graphviz debugger to own file

We might want to add more debugging methods, so makes sense to have
dedicated folder for all of them.

Depsgraph: Don't use capital prefix for non-public functions

Depsgraph: Wrap everything into DEG namespace

Some areas are nto so pretty looking atm, but there are not so much
of them for now. And we can easily solve that by making it so public
API simply calls an inlined function from DEG namespace.

Fix for pynode group registration.

Because pynode groups now use the bl_idname of tree types rather than
expecting a python class attribute, these tree types need to be registered
*before* generating node group classes. Messy stuff, needs some rewriting.

Fix for depsgraph building of modifiers, missing nodes for ID blocks (textures).

The updateDepsgraph callback for modifiers needs to be used in both passes of
depsgraph building, once for creating nodes and then for relations. Without the
initial node building pass some datablocks like textures can be missing, if they
are not incidentally built by other means such as a render texture.

Depsgraph: Remove unused code from debugger

Would be cool to stick to a policy that dead code is forbidden.

Those areas were not changed or touched in ages, we'll still have
the code in Git history but can get rid in real sources.

Depsgraph: Move nodes declaration and definition to own directory

The idea is to also split some files and make it more granular in
order to increase readability and maintainability.

Added weighted samples

Added ambient occlusion support in material
Algorithm is slow but high quality
Added backface buffer to compute per pixel thickness
Sampling quality is passed via uniforms and not via constants : this is a little slower but it does not need to recompile shader every time
Moved some code for organisation.

solve conflict between local and upstream

finish link two correspondence together

add link and unlink button in scripts for python

add two correspondence operators

users can specify correspondence in tracking mode
placeholder for now, unfinished