Blender Git Loki

Probe: Irradiance Volume: Fix default clip start.

Eevee: Refactor of shading code to be more modular.

This will enable creating shading models more easily.

Fix T51920: Invalidate draw cache when changing object origin

Fix own really stupid mistake/typo in previous commit...

Fix T51900: Crash after pressing "F" multiple times.

`BMO_iter_as_array()` may fill less items than requested in given array,
so we have to update number of items to work on from its returned value,
otherwise code might try to use uninitialized memory.

DwM: mesh data now only creates data thats used

Read from the GPUMaterial to find custom-data layers used for drawing.

This resolves problem where having UV's would always calculate tangents
causing noticeable slow down compared to 2.7x.

DwM: create eevee materials before the mesh

To know which custom-data layers will be needed in the mesh.

No functional change yet.

DWM: Fix own error checking wrong layer type

Would calculate all tangents for every UV layer.

GPU: split GPU_material_from_nodetree in two

Add GPU_material_from_nodetree_find to avoid having to construct other
arguments which won't be used in the case the material is exists.

Fix own error removing texface

Setting the name crashed with NULL poly layer.

Fix own error removing texface

Using pointer offsets from different arrays

DWM: separate tangents from UV conversion

Prepare for different number of UV/Tangent layers.

GPU: GPU_generate_pass_new now takes vertex-attrs

Needed so we can tell which custom-data layers to use from the mesh.

Fix missing globalsBlock in edit mode latice drawing

This was causing lattice vertices not to be drawn.

Fix T51913: Context tab for textures issue

The original code was doing a sanity check to see if existing index was
out of range. However the comparison was wrong.

So if the previous ct->user (active index of texture node) was larger
than then number of available texture nodes + 1 in the other material,
we would never re-set the index to 0.

Bug introduced on c31f74de6bb7.

There was an early attempt of fixing this (2b2ac5d3cc) but it was just working
by pure, luck. And failing in cases like the one from this bug report.

Implement weight colors for lattices in draw manager

LightProbes: Change 3d view display shape.

Introduce specific shape for each probe type to easily identify them.

Fix typo in Eevee hair UV handling

Cleanup: remove unused function

mikktspace: minor optimization

Add a safe version of normalize since all uses of normalize
did zero length checks, move this into a function.

Also avoid unnecessary conversion.

Gives minor speedup here (approx 3-5%).