Blender Git Loki

Eevee: SSR: Fix cone footprint estimation.

Eevee: SSR: Blur Mipmaps more.

Cost is negligeable (Only 0.02 ms more) and it improve stability.

Eevee: SSR: Refine Raytrace Algorithm.

We track the previous ray position offseted by the thickness. If the sampled depth is between this value and the current ray position then we have a hit.
This fixes rays that are almost colinear with the view vector. Thickness is now only important for rays that are comming back to the camera.

As a consequence, this simplify a lot of things.

Also include some refactor.

Eevee: Correct Mipmap texel alignment.

Since we are working with non power of 2 textures, the mipmap level UV does not line up perfectly.
This resulted in skewed filtering and bad sampling of the min/max depth buffer.

Eevee: Add Refraction via probes.

Eevee: Small code codestyle and fixes.

Rename get_specular_dominant_dir to get_specular_reflection_dominant_dir.
Add Zero length N check everywhere.

Eevee: LUT generation.

We generate a 3D lut to precompute the btdf intensity.
I decided to use a 64*64*16 (N dot V, ior, roughness) because the btdf varies less with roughness than with IOR.
We also remap the ior to better use the space in the LUT.

Eevee: Add precomputed BTDF LUT.

Tweak and extend POV syntax hilghting.

*Changed categories of some keywords
*reordered some longer keywords that didn't appear
*Activated another color (reserved builtins) by Leonid
*added some HGPOV and UberPOV missing keywords

Patch by Maurice Raybaud (@mauriceraybaud). Thanks to Leonid for additions, feedback and Linux testing.
Related diffs: D2754 and D2755.

While not a regression, this is new feature and would be nice to have it
backported to final 2.79.

Cleanup: make seq dupli scene operands' names match global copying convention.

Followup to rB1037b90cb831b, forgot to save that file :(

Cleanup: de-duplicate makefile OS checks

Manipulator: add compositor corner-pin widgets

Cleanup: make seq dupli scene operands' names match global copying convention.

Fix T52332: crash when duplicating sequencer strips.

Bug introduced in recent ID copying refactor.

This commit basically sanitizes seq strip copying behavior, by making
destination scene pointer mandatory (and source one a const one).
Nothing then prevents you from using same pointer as source and
destination!

Fix T52324: Metaball disappears when deleting first metaball object.

Lost specific MBall 'need update' case here in last year's refactor.

While technically not a regression, nice to have in 2.79.

Added Multithreading to the intersection tests. No real performance improvement. Maybe multithreading needs to be relative to the rings, not to the nodes (double nested both?).

Cleanup: Remove compiler warning

Fix Tint error when factor is 1

When factor is 1, must override the alpha of the original color

Fix opacity modifier error with values greater than 1.0

If the opacity is set to >1 values, the alpha must be overrided.

Merge branch 'master' into blender2.8