Blender Git Loki

Fix T79440: Deform modifiers fail in edit-mode when not first

Lattice, armature & curve only worked when an edit-mesh was passed in,
the mesh argument was being ignored.

Regression in 9f5833798caf9

Cleanup: remove unused code, update comments

Cleanup: remove trailing space, newlines at eof

Merge branch 'blender-v2.90-release' into master

Mesh: correct negative material indices when validating

Fixes corrupt mesh from T79451.

Fluid: Added support for MAC Grid visualization

Cycles: add support for rendering deformation motion blur from Alembic caches.

This patch adds the ability to render motion blur from Alembic caches.
The motion blur data is derived from a velocity attribute whose name has
to be defined by the user through the MeshSequenceCache modifier, with a
default value of ".velocities", which is the standard name in Alembic
for the velocity property, although other software may ignore it and
write velocity with their own naming convention (e.g. "v" in Houdini).

Furthermore, a property was added to define how the velocity vectors
are interpreted with regard to time : frame or second. "Frame"
means that the velocity is already scaled by the time step and we do not
need to modify it for it to look proper. "Second" means that the unit
the velocity was measured in is in seconds and so has to be scaled by
some time step computed here as being the time between two frames (1 /
FPS, which would be typical for a simulation). This appears to be
common, and is the default behavior.

Another property was added to control the scale of the velocity to
further modify the look of the motion blur.

Reviewed By: brecht, sybren

Differential Revision: https://developer.blender.org/D2388

Merge branch 'greasepencil-edit-curve' into soc-2020-greasepencil-curve

GPencil: Add snap to grid for curve points

GPencil: Implement basic extrude support

Fix bugs re triangle sorting.

Several somewhat self-compensating bugs in the routine that sorts
triangles around an edge let to a bug visible with a unit cube
subtracting a unit cylinder with 4 sides. Fixed.

Custom Menus : Add icon edition

Particles: new Age Reached Event, Kill Particle and Random Float node

The hardcoded age limit is now gone. The behavior can be implemented
with an Age Reached Event and Kill Particle node. Other utility nodes
to handle age limits of particles can be added later. Adding an
Age Limit attribute to particles on birth will be useful for some effects,
e.g. when you want to control the color or size of a particle over its
life time.

The Random Float node takes a seed currently. Different nodes will
produce different values even with the same seed. However, the same
node will generate the same random number for the same seed every
time. The "Hash" of a particle can be used as seed. Later, we'd want
to have more modes in the node to make it more user friendly.
Modes could be: Per Particle, Per Time, Per Particle Per Time,
Per Node Instance, ...
Also a Random Vector node will be useful, as it currently has to be
build using three Random Float nodes.

Merge branch 'blender-v2.90-release'

Fix T67181: Only the first added movie strip will have audio below

Find free slot first for sound strips then for movie strips.
This patch also fixes issue where all strips were added to channel 2 by default.

Reviewed By: brecht

Differential Revision: https://developer.blender.org/D8339

Fix T66805: No cache invalidation with remove gaps operator

Reviewed By: brecht

Differential Revision: https://developer.blender.org/D8379

Fix building WITH_GMP in case of boolean modifier.

Left out a define.
Also, added more debugging in boolean.cc.

Merge branch 'master' into newboolean.
Also, make it possible to build when WITH_GMP is disabled.

GPencil : Fix error exporting animation to SVG

Warning removal: Remove unused argument; make a private function static.