Blender Git Loki

Cycles: Set error if a split kernel fails to load

To help catch cases where adding a new kernel is missed for one of the
device implementations.

Manipulator: ruler tool

Add the 3D view ruler as a tool,
the modal operator remains for now
however it may be removed if we use the tool-system for 2.8.

Note that this does copy code from the operator,
its different enough not to attempt to de-duplicate.

Manipulator: public highlight utility function

Also utility to find group from a manipulator map.

Fix assert failure when trying to draw empty string

Merge branch 'master' into blender2.8

Layers Unittest: Hidden flag to quckly update diffs

This is not the commit you are looking for ...

This is not to be used lightly. But sometimes we change the name of the collections,
the initial value they have, ... and this helps to quickly update the tests.

mball_tessellate: Simplify face creation

Faces that have the last two indices equal are considered triangles, and not those that the last index is 0
Improvement of 7% in performance of the `polygonize` function

Unittest: Layers - include is_disabled for LayerCollection

And remove is_folder since it is not being used.

Fixup for doversion/layers: disable collections for scene layers

Layers doversion: Handle hide and hide_render objects

We now created nested collections for the original Collection 1, 2 ...
collections for the "hide" and "hide_render" objects.

Also, remove logic for rename single-collection files, it's now kept as
it was originally (Collection 1, Collection 5, ...).

Thanks Sergey Sharybin and Pablo Vazquez for patch review and suggestions.

Workaround crash rendering font objects

Needs a proper scene layer and dependency graph, which we do not have
yet during render pipeline.

Merge branch 'master' into blender2.8

Merge branch 'master' into blender2.8

Cycles: Fix compilation error with latest OIIO

There was some changes about namespaces, which causes ambiguities.

Replaces using namespace with an explicit symbols we need. Is good idea to NOT
pull in the whole namespace anyway!

Cycles: better distance sampling for chromatic volume extinction.

Previously we picked one of the RGB channels with equal probability, but this
works poorly in a dense volume after many bounces. Now we take into account
the throughput and single scattering albedo.

This makes it a little more practical to do brute force SSS with volumes, but
is still very inefficient because we do direct light sampling at every volume
bounce even when inside an opaque mesh. In theory there could be a light inside
the mesh so we can't automatically disable direct lighting.

Fix T53270: crash with multiscatter GGX after recent refactoring.

In fact this was an existing issue when exceeding the number of available
closure, but it's more common now that we set the number to 0 for shadows
and emission

Fix (harmless) valgrind warning.

Cycles: avoid reallocating tile denoising memory many times during render.

Farewell BaseLegacy

Finally, bases are all using the latest, newest SceneLayer bases.

BGE cleanup: remove Base from KX_Light.h