Blender Git Loki

Cleanup: use saturate3() for float3 clamping

Ref D5363

Cleanup: fix compiler warning

build virtual node tree in constructor

remove particle block from interfaces

Merge branch 'master' into greasepencil-object

Merge branch 'master' into temp-gpencil-drw-engine

Conflicts:
source/blender/draw/engines/gpencil/gpencil_engine.c

remove StepDescription and ParticleType entirely

Cleanp: fix compiler warnings

don't use ParticleType abstraction in simulation code

don't use StepDescription abstraction in simulation code

initial step simulator abstraction

Cycles: GPU code generation optimizations for direct lighting

Use a single loop to iterate over all lights, reducing divergence and amount
of code to generate. Moving ray intersection calls out of conditionals will
also help the Optix compiler.

Ref D5363

Cycles: inline more functions on the GPU

This makes little difference for CUDA and OpenCL, but will be helpful
for Optix.

Cycles: change svm node decoding for more efficient code generation on GPU

These functions no longer accept NULL. They were renamed for clarity and to
avoid hidden merge issues.

Ref D5363

Cycles: remove workaround to pass ray by value

CUDA is working correct without it now, and it's more efficient not to do this.

Ref D5363

Cycles: tweaks for better GPU code generation

Uninitialized variables are harder to handle for the compiler.

Ref D5363

Cycles: fixes for building kernel without certain features

Ref D5363

Cleanup: fix use of wrong constant

Ref D5363

Cleanup: fix compiler warning

Fix render test Python error on crashes