The current particle state is stored in a `CustomData` instance and
the cache is stored in `PointCache`.
The current state exists on the copy-on-write copies of the simulation,
while the cache only exists in the original data block.
This patch implements a temporary trivial particle simulation that does not
use the node system yet. It is used for testing and will be replaced soon.
`PointCache` still has some limitations that need to be overcome using
separate refactorings. For example, we need to be able to store the number
of particles in the point cache. Also we need to change which attributes
are stored for a particle system more dynamically than is currently possible afaik.
Reviewers: brecht
Differential Revision: https://developer.blender.org/D7836
This removes some fragment shader hacks and improve the support of
different repeat & filtering modes.
This fix T77453 Image texture not repeating in viewport
Previously, the first frame was displayed from frame 0, but now, the first frame is only displayed when the current frame is equal or greater than the keyframe number.
The previous system was logical when the grease pencil was not an object, but now it seems more logical to display the keyframe if the current frame is equal to or greater than the keyframe number.
Reviewed By: mendio, pepeland
Differential Revision: https://developer.blender.org/D7851
Because this controls how the amount is used in should be set first and
is more important therefor place it at the top.
This is also consistent with other areas in Blender
If a layer is used for masking, it cannot be filtered by viewlayer because the masked layer needs to have the mask layers in the draw pipeline.
This check is only done in final render.
This is a critical fix that should also be backported to 2.83.1
Fairly stupid bug in fact, code detecting changes across undo steps was
assuming that each BHEAD (a block of data in blendfiles) would not be larger
than one memory chunk... Which is the case in alsmost every situation,
besides some super-heavy geometries, and other similar things (images
would also be affected e.g.).
