Blender Git Loki

GPencil: Remove old code to compile

First ideas to improve import/export

Merge branch 'master' into greasepencil-object

Build-system: Force C linkage for all DNA type headers

Some DNA headers already did this, most did not. Even though many of them would
be included in C++ files and thus compiled as C++. This would be confusing and
developers may think they have to add `extern "C"` too a whole lot of
(indirect) includes to be able to use a C header in C++.

However, this is a misconception.
`extern "C"` does not cause code to be compiled with C rather than C++! It only
causes the linker to not use C++ function name mangling. See
https://stackoverflow.com/a/1041880.
Because extern DNA headers don't have function declarations, using `extern "C"`
actually should not have any effect. On the other hand, adding it causes no
harm and avoids confusion. So let's just have it consistently in C header
files.

Differential Revision: https://developer.blender.org/D9578

Reviewed by: Bastien Montagne, Sybren St�vel

Geometry Nodes: transform geometry in Object Info node

Geometry Nodes: give nodes access to object that is being modified

Geometry Nodes: simplify attributes api and support deletion

The main difference is that the functions to access attributes have
been moved to MeshComponent and PointCloudComponent.

Fix crash when adding strip using RNA API call

Don't allocate StripElem for movieclip, scene and mask strips. This
struct is not handled in seq_dupli function. This caused field to be
uninitialized in COW datablock.

StripElem is not allocated when adding strip with operator and it is
not needed for these strip types.

Reviewed By: sergey

Differential Revision: https://developer.blender.org/D9600

Merge remote-tracking branch 'origin/master' into temp-T52744-euler-filter

Cleanup: refactor sequencer_edit.c file

Move RNA enums and utility functions closer to operator definition.

No functional changes.

Cleanup: Animation, fix uninitialised variable in Euler filter code

No functional changes.

Cleanup: Animation, fix uninitialised variable in Euler filter code

No functional changes.

Cleanup: Animation, refactor Euler filter

Split up the Euler filter function into two more functions. The Euler
filter operator works in two stages (find channels that define the X/Y/Z
Euler rotations, and perform filtering on those channels), and each
stage now has its own function. This makes it clearer which data are
used in which part of the code, and makes future improvements easier.

No functional changes.

New Euler filter implementation

This new discontinuity filter performs actions on the entire Euler
rotation, rather than on the individual X/Y/Z channels only. This should
make it fix a wider range of discontinuities, for example those in .

Manifest Task: T52744

Docs: document bmesh.utils.vert_collapse_faces join_faces argument

Cleanup: Animation, refactor Euler filter

Split up the Euler filter function into two more functions. The Euler
filter operator works in two stages (find channels that define the X/Y/Z
Euler rotations, and perform filtering on those channels), and each
stage now has its own function. This makes it clearer which data are
used in which part of the code, and makes future improvements easier.

No functional changes.

Fix error message prefix in `Quaternion.to_euler()`

Fix copy-paste error of error message prefix, so that the Quaternion
function no longer says it's a Matrix function error.

Cleanup: fix bad comment separator

Replace `* /` with `*/` to actually end the comment. As it was, the code
compiled but caused an "`/*` in comment" warning.

No functional changes.

importer: fix r issue for file created on windows.

Merge remote-tracking branch 'origin/blender-v2.91-release'