Blender Git Loki

Merge branch 'master' into writefile_rework

Big refactor of differential override storage.

On second thought, modifying real data-block to store diff in it is...
just bad. Because it affects actual data, because it involves complicated
and heavy processes like remapping, and because it stores useless values
in .blend file (i.e. values that would give garbage results if e.g.
opening .blend file with older version of Blender, etc.).

So instead, decided to save an extra data-block in .blend file each time
we have some differential overrides.

Note that for now, we do full copy of datablock into its extra 'storage'
sibbling for .blend file. This is bad (think about double copy of heavy
mesh...) and will have to be fixed. Whole copy process will need serious
work anyway, for that kind of features we need to be able to copy
without increase usercount of IDs etc.

In fact, here, maybe we even need a smarter version of copy that would
only duplicate sub-data as needed by diff-overriden properties...

Merge branch 'writefile_rework' into id_override_static.

That way we don't have to add the same stupid few lines to *all*
datatypes writers! Obvious gain on efficiency and security from coding PoV.

Conflicts:
source/blender/blenloader/intern/writefile.c

Merge branch 'master' into writefile_rework

Merge branch 'master' into id_override_static

Merge branch 'master' into id_override_static

Refactor writefile handling of data-blocks.

Instead of calling a function looping over whole list of a given ID
type, make whole loop over Main in parent function, and call functions
writing a single datablock at a time.

This design is more in line with all other places in Blender where we
handle whole content of Main (including readfile.c), and much more easy
to extend and add e.g. some generic processing of IDs before/after
writing, etc.

From user point, there should be no change at all, only difference is
that data-block types won't be saved in same order as before (.blend
file specs enforces no order here, so this is not an issue, but it could
bug some third party users using other, simplified .blend file reader
maybe).

Reviewers: sergey

Differential Revision: https://developer.blender.org/D2510

Fix some crashes when ID would reference itself.

Typical case: bones having constraints targetting other bones from same
armature. ID swap needs remapping here.

Really have to find something better than regular ID copy + swap + relinking
for override operations, this is horribly inneficient, complicated
and... most likely a nest of bugs and worms.

(pretty sure e.g. we still can generate same pointers during writefile
with current code :( ).

Merge branch 'master' into id_override_static

Alembic: #undef'ed the correct macro

TEST_RET is not defined anywhere in Blender's sources, and LAYER_CMP
is no longer used after this function ends.

Cycles: Fix compilation error on OpenCL

Cycles: Implement record-all transparent shadow function for GPU

The idea is to record all possible transparent intersections when
shooting transparent ray on GPU (similar to what we were doing on
CPU already).

This avoids need of doing whole ray-to-scene intersections queries
for each intersection and speeds up a lot cases like transparent
hair in the cost of extra memory.

This commit is a base ground for now and this feature is kept
disabled for until some further tweaks.

More tweaks to Normalisation options in Graph Editor

* Added a new dedicated icon for normalize
* Only use an icon for "Auto"

Cycles: Solve speed regression by casting opaque ray first

Fix T49249: Alembic export with multiple hair systems crash blender

Removed unnecessary call to DM_update_tessface_data(). This call is
already performed by DM_ensure_tessface(dm). The call being performed
twice caused a failing BLI_assert().

Reviewed by: K�vin Dietrich

Alembic export: avoid infinite loops trying to find parent objects.

Also added some assertions for debugging purposes

Reviewed by: K�vin Dietrich

Cycles: Speedup transparent shadows on CUDA

This commit enables record-all behavior of transparent shadows
rays.

Render times difference goes as following:

GTX 1080 render time
BMW -0.5%
Fishy Cat -0.0%
Pabellon Barcelona -11.6%
Classroom +1.2%
Koro -58.6%

Kernel will now use some extra VRAM memory to store the intersection
array (200MB on my configuration). This we can optimize out with some
further commits.

Alembic export: only create transform writer if the object should be exported

Reviewed by: K�vin Dietrich

Cycles: Use an utility function to sort intersections array

Graph Editor: Replace Normalise/Auto checkboxes with toggle buttons

These take less space, fit in better with rest of the UI, and make their relationship clearer