Blender Git Loki

OpenGL: use new matrix names in GLSL

Builtin names staring with gl_ will not be available in core profile. Same with the ftransform function. New matrix API provides the same names minus the gl_ prefix.

Part of T49450

OpenGL: fix & enhance new matrix lib

- init projection matrices with identity
- fix copy/paste mistake in GetProjectionMatrix3D
- add extra matrices needed by material GLSL

Working toward T49450

GPU_shader automatically uses new matrix values

Whether used from Gawain or from traditional OpenGL draw methods.

TODO: make sure we bind matrices only once per shader change.

Part of T49450

OpenGL: use old API for texture matrix

New matrix API does not support texture matrices. Not sure what the final code will look like, but this at least avoids interference with new ModelView matrix.

Marked each line with TEXTURE so they can be disregarded during searches.

Related to T49450

OpenGL: remove several glMatrixMode calls

A few of these were redundant, others could be converted to new matrix API.
Part of T49450

Add back missing include

Fix padding and align calculation for box layouts

Cleanup: line length, assignment

Fix: Ignore min flag for rows that require all available width

Fix: Use "round" instead of "floor" in snapping UI to pixels

Fix: Button's label can be NULL

re-adds the include "BLI_math.h" to custondata

It was removed here rBd52191616b5f

Cleanup: simplify script path assignment

PyAPI: add missing class registration

PyAPI: debug-python check for missing class register

Moving to manual class registration means its easier to accidentally
miss registering classes.

Now detect missing class registration
and warn when running with `--debug-python`

Fix GHOST crash on X11 with recent DPI changes on some systems.

Draw Manager: fix glitches when setting 3d cursor position by click.

New Grid : Feature parity with old grid.

Removed infinite details and went for decreasing details with the distance instead (like the axis aligned ortho view auto sized grid).
Separate drawing of the Z axis into 2 pass (using shading group) to render ordered transparency with the main grid pass.

New Grid: Fix depth fighting and remove some unused variables.

Clay Engine: Cleanup

Remove unused code.
Fixed the amount of sample in the noise texture.
Add a small optimisation.