Blender Git Loki

Cycles: Implement threaded SVM nodes compilation

The title says it all actually. From tests with barber shop scene here
gives 2-3x speedup for shader compilation on my oldie i7 machine. The
gain is mainly due to textures metadata query from jpeg files (which
seems to requite de-compression before metadata can be read). But in
theory could give nice improvements for scenes with huge node trees
as well (i'm talking about node trees of complexity of fractal which
we had reports about in the past).

Reviewers: juicyfruit, dingto, lukasstockner97, brecht

Reviewed By: brecht

Subscribers: monio, Blendify

Differential Revision: https://developer.blender.org/D2215

Cycles: Don't run full shader evaluation for constant emission lamps

Most of the time, Lamps in Cycles are just a constant emission closure, no texturing etc. Therefore, running a full shader evaluation is wasteful.
To avoid that, Cycles now detects these constant emission shaders and stores their value in the lamp data along with a flag in the shader.
Then, at runtime, if this flag is set, the lamp code just uses this value and only runs the full shader evaluation if it is neccessary.

In scenes with a lot of lamps and with "Sample all direct/indirect" enabled, this saves up to 20% of rendering time in my tests.

Reviewers: #cycles

Differential Revision: https://developer.blender.org/D2193

Cycles: Revert cleanup commit, will make it easier to cherry-pick

retain existing creases, added inner crease and interpolate edge data with carve now

crash fix for particle grid emission, do not allow to re-distribute particles there...

fix when using inner vertexgroup, weights of other vgroups on the same mesh were deleted by accident then

fracture modifier RNA refactor, outsourced FM RNA code and python API code to separate files

fix for crash with physical rough edges (via addon)

caused by not checking whether objects in rigidbody group are rigidbodies, actually.

let weights fade out at breaking locations with dynamic fracture

transfer all speeds with dynamic fracture now, not only those above the sleep threshold

particles, only suppress unborn particles when density vgroup is empty / has zero weight

fix for external FM mode, take object locations into account as centroids for physics shapes, too

particle system: allow changing vgroups over time, suppress emission on empty assigned density vgroups

fix attempt for avoiding unintentional dissolve of all constraints in dynamic fracture

fix : inner vertexgroups created with fractal boolean now too

crash fix with FM and forcefields

added some random rotation for fast bisect, to reduce parallel cuts

support for keeping edge data in fracture modifier (like sharp edges)

inter-objects constraint objects can now determine which shards (closest) will be connected to the other object

small fix for compounds, new collision suppression is disabled for them now

it caused wrong behavior - one shard always fell off unintendedly.