Blender Git Loki

Merge branch 'blender-v2.93-release'

EEVEE: Geometry info -> tangent: Make consistent with Cycles for hair

Changes output for geometry info node in Eevee to be consistent with Cycles (w/o osl)

Before this patch Eevee outputs Z-tangent even for hair. This patch changes it to output hair tangent (growth direction). Hair tangent is impossible to derive otherwise from normal or view direction.

Reviewed By: fclem, brecht
Differential Revision: https://developer.blender.org/D10841

Geometry Nodes: don't show grease pencil materials for now

Those materials cannot be on geometry handled by geometry nodes yet.
So it makes sense not to show those materials in the material socket.

Geometry Nodes: take materials into account when joining geometries

Materials are now kept intact when using the Join Geometry node
or when realizing instaces.

Fix issue in previous commit

When `PointerRNA->data` was null, it was interpreted as being
`None` in Python. This caused the materials slots to not show
correctly in the ui.

Materials: support changing materials during evaluation

This commit allows that the evaluated geometry of an object has
different materials from the original geometry. This is needed
for geometry nodes.

The main thing that changes for render engines and exporters
is that the number of material slots on an object and its geometry
might not match anymore. For original data, the slot counts are
still equal, but not for evaluated data.

Accessing material slots though rna stays the same. The behavior
adapts automatically depending on whether the object is evaluated.

When accessing materials of an object through `BKE_object_material_*`
one has to use a new api for evaluated objects:
`BKE_object_material_get_eval` and `BKE_object_material_count_eval`.
In the future, the different behavior might be hidden behind a more
general C api, but that would require quite a few more changes.

The ground truth for the number of materials is the number of materials
on the geometry now. This is important in the current design, because
Eevee needs to know the number of materials just based on the mesh in
`mesh_render_mat_len_get` and similar places.

In a few places I had to add a special case for mesh edit mode to get it
to work properly. This is unfortunate, but I don't see a way around that
for now.

Differential Revision: https://developer.blender.org/D11236

Fix T88362: Lineart countour rendering error

This is caused by lacking of consideration of
OB_DUPLICOLLECTION in updateDepsgraph() in the
modifier.

Reviewed by: Antonio Vazquez (antoniov)

https://developer.blender.org/D11292

VSE: Move whole strip chain to meta

Python API function Sequence.move_to_meta() did delete effect chain
when strip with effects was moved.

Use iterator API to query effect strips and move whole chain to meta.

Reviewed By: sergey

Differential Revision: https://developer.blender.org/D11206

VSE: Better handling of effect strip splitting

Splitting of effect strip alone wasn't handled properly. Previously
this resulted in duplicating effect strip, and it was broken at least
from 2.79.

Change in rB8ec6b34b8eb2 was intended to allow splitting strips
individually, so it can be used as RNA API function but also so it
requires as little glue logic as possible.

This is fixed by splitting all dependent strips at once in 2 separate
ListBases for left and right strips. Strips can be finally moved into
original `ListBase`.

With this fix it is still possible to split strips individually with
little glue logic. RNA API function could return list of split strips
as well, currently at least one strip in chain will be provided so
chain can be reconstructed on python side.

Reviewed By: sergey

Differential Revision: https://developer.blender.org/D10209

Merge branch 'blender-v2.93-release'

Fluid: Updated Mantaflow source files

Includes update for OpenVDB file IO, i.e. fixes an issue with
compression flag combination that resulted in random segfaults.

Other changes: Cleanup and formatting.

Fix T88313: GPencil reproject operator projecting on the wrong surface

`ray_start` must start at the position of the gpencil point.

Alembic: read/write generated coordinates of meshes

Read and write generated coordinates (also known as "original
coordinates", "reference coordinates", or "orcos") from and to Alembic.
A custom geometry property named "Pref" is used for (hopefully)
interoperability with Maya and Houdini. For now it's only guaranteed for
Blender-to-Blender.

Export: writing generated coordinates is optional (on by default).

Import: generated coordinates are always read whenever the reading of
vertex data is enabled.

Manifest Task: T88081

Cleanup: typo in comment.

Fix ID copying outside of Main affecting 'directly linked' status of other IDs.

Copying an ID outside of BMain should not assume that the datablocks it
uses are now directly linked. This would be wrong e.g. in case that new
no-main ID is copied from a linked data-block and is supposed to remain
a linked data.

Merge branch 'blender-v2.93-release'

Fix build warning

Value of the size argument in `strncat` is too large, might lead to a
buffer overflow.

Change the argument to be the free space in the destination buffer
minus the terminating null byte.

Introduced in 5368859a669d

Reviewed By: Sergey

Differential Revision: https://developer.blender.org/D11289

Merge branch 'blender-v2.93-release'

Fix T88370: GPencil render crash when use viewlayer and masking

When filtering the render using view layer, could be possible the mask is NULL and just need to be ignored.

Fix T88365: GPUTexture.read returning a buffer with wrong size

The pixel components were not being considered.