Blender Git Loki

Merge branch 'master' into cycles_procedural_api

format

Merge branch 'master' into cycles_procedural_api

Add a proper attribute standard and TypeDesc for deltas.

Support delta compression on the CPU.

Add a setting to stop doing deltas after a certain amount of frames.

Stop computing deltas if rendering is cancelled.

add options to ignore subdivision, use prefetching, and disable caching

fix missing prefetching for subdivision meshes

Allows deltas whose magnitudes are greater that 1.0.

Fix crashes caused by reading non-existent data

The index_data_map was not swaped with the rest of the data, and there
was no indication that the first frame does no have min/max data for the
delta range.

several fixes for the delta attribute inside of the procedural

fix out of bounds access in the kernel

fix assertion for missing attribute type

cleanup

do not pack the data for CPU if not needed, try to make deltas work for
ranges outside of (-1,1)

fix compile error

Merge branch 'master' into cycles_procedural_api

store deltas in some attribute

Alembic procedural: deduplicate cached data accross frames

Currently the procedural will add an entry to the cache for every frame
even if the data only changes seldomly. This means that in some cases we
will have duplicate data accross frames.

Now we compute a hash for the data and compare it to the one for the
previous frame and only if they are different do we create a new entry.
The hash is computed by the Alembic library (using murmur3).

This can drastically reduce memory usage at the cost of more processing
time. In one file, memory usage goes from 9.08 Gb down to 4.28 Gb over
240 frames.