Blender Git Commits

Cycles: add support for mesh deformation motion blur.

Cycles code refactor: add motion sampled normals attribute.

Cycles code refactor: improve vertex motion attribute storage and export.

This now supports multiple steps and subframe sampling of motion.

There is one difference for object and camera transform motion blur. It still
only supports two steps there, but the transforms are now sampled at subframe
times instead of the previous and next frame and then interpolated/extrapolated.
This will give different render results in some cases but it's more accurate.

Part of the code is from the summer of code project by Gavin Howard, but it has
been significantly rewritten and extended.

Cycles code refactor: change curve key to float4 for easier storage as attribute.

Cycles code refactor: changes to make adding new primitive types easier.

Cycles code refactor: add support for motion vertex attributes.

Cycles code refactor: move more geometry code into per primitive files.

Cycles code refactor: move geometry related kernel files into own directory.

Code cleanup: avoid setting du/dv twice with ray intersection

Code cleanup: replace dot with len_squared and is_zero checks

Cleanup: Minor spelling fixes:

GPU_pbvh_buffers: Use triangles to render multires.

A question here might be: why?

The answer is that GPUs will convert this to triangles so we are wasting
memory during conversion of the element buffer to a triangle buffer
anyway.

The second reason is that some modern GPUs are slower rendering GL_QUADS

The third reason is that due to element caching, this should not in
theory be slower (cached elements do not get recalculated on the GPU).

UI: Color-Ramp handles

- display handles with solid color.
- active handle is highlighted.
- 1/4 of the colorband draws solid.
- use old-style handles when zoomed out.

D289 by Charlie Jolly with own modifications.

Checker percentage calc was wrong, also cleanup

Update clang array checker for new clang py api

Fix building without openmp continued

Code cleanup: correct arg size

Forgot to clean a line in last commit

Fix compiling sculpt without OpenMP available

Fix T39468

Issue is that sampling functions did not pass a thread index to the
texture sampler so all threads were contesting for the same pool.

Paint cursors and sculpting that used openmp for threading suffered from
this. Now use omp_get_thread_num to pass the thread number.