Blender Git Loki

Add profile control parameter to Bevel.

Parameter controls concavity / convexity.
<.25 means: concave inward
.25 means: straight slanted
>.25 means: concave outward
.5 means: circular (the default)
1 means: straight along original sides
For now, there is a hard lower limit of .15
because more work is needed to get decent
results in the range below that.

The profile is actually a superellipse, and the
parameter is 1/4 of the exponent in the implicit equation
for a superellipse, except at the extreme values of 0 and 1.

Cycles: Fix World Homogeneous volume setting, had no influence.

Thanks to "storm" for noticing this!

Code Cleanup: de-duplicate text pasting which only used the first line

Text3d: improve error checking when pasting from files

Fix for RE_engine_begin_result using a NULL pointer

Sequencer: prevent unknown scopes from crashing

Fix for inorrect use of BLI_utf8_invalid_strip, add assert to prevent it happening again.

UV Unwrap: smart uv unwrap would fail still on some very small faces

Fix T38112: Rigid Body can't be created for objects with linked mesh

Make poll function for rigid body add operators less strict.

Much better solution for negate/inverse in numinput.

Previous one was way over complicated, and did not worked with units!

Fix a small glitch with string generated by numinput, they could cut multi-bytes utf8 chars (like the '°' of angle values), now call BLI_utf8_invalid_strip() to prevent this.

Fix T38100: laplacian smooth crash

UI / Nodes: Revert Slider for "Value" node, this is no percentage nor a 0-1 range.

Cycles: Update Integrator Presets and Total Samples info for latest changes.

Fix CUDA/OpenCL compile errors in scattering commit.

Cycles: Volume Scatter node was missing in the Add Node menu.

Fix for crash in anim render: The callbacks in bMovieHandle are expected
to exist and accessed without prior NULL checks (with exception of
get_next_frame and get_movie_path). The callbacks are not reliably
initialized however if none of the video formats is enabled (AVI being
the default). Added stub functions now that ensure access to
bMovieHandle callbacks is safe and doesn't crash.

Cycles Volume Render: scattering support.

This is done by adding a Volume Scatter node. In many cases you will want to
add together a Volume Absorption and Volume Scatter node with the same color
and density to get the expected results.

This should work with branched path tracing, mixing closures, overlapping
volumes, etc. However there's still various optimizations needed for sampling.
The main missing thing from the volume branch is the equiangular sampling for
homogeneous volumes.

The heterogeneous scattering code was arranged such that we can use a single
stratified random number for distance sampling, which gives less noise than
pseudo random numbers for each step. For volumes where the color is textured
there still seems to be something off, needs to be investigated.

Fix for error in own recent commit

Cleanup: silence warnings.