Blender Git Loki

[COLLADA]Mesh Controller improvements

Texture Paint Alpha Masks
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* Cleanup of panels

Fix overlay for tiled mapping. This involves separating the overlay
generation code between alpha(brush curve, mask texture) and image
opengl textures and combining the two with multitexture combiners
(ancient functionality that should work everywhere). It still needs some
testing but result is now as expected.

Isomap unwrapper
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* Robustness: Avoid nan in sqrt calculation
* Do a much simpler calculation of projected point.

Isomap Unwrapper
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* Substitute geodesic distance calculation method with one found in
"Computing Geodesic Distances on Triangular Meshes"
by Marcin Novotni and Reinhard Klein.

At last we have a good result! :)

[COLLADA]Morph Controller Import.

- bf_fbx: add settings parameter to entry point, enable the assimp log pipe by default.

[COLLADA] Morph export fixes and fiddling.

*Fix quadratic equation solution formula (hadn't used this since high
school)
*Add some debug prints

Isomap unwrapper
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* Calculation code for geodesic distance based on two neighbours. Still
not functional. Based on "Computing Geodesic Paths on manifolds" by
R.Kimmel and J.A. Sethian. with slight modifications (obtuse angle
triangles are split instead of looking for suitable vertex in the graph)

The result is still not good, hunting for bugs.

[COLLADA] Morph animation export intro.

[COLLADA]Morph Controller export.

[COLLADA]ControllerExporter , Re-factor from ArmatureExporter

Morph target export to COLLADA fix

merge with trunk 49750

Isomap Unwrapper
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* Add code that determines the distance based on nearby vertices, if any
of them have had their distance calculated. That has been achallenge as
can be seen from the loads of debug code that went into it.

Isomap Unwrapper
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* Testing: Make distance update step depend on two triangle vertices.
Calculation is not yet done, still this test is essential to make sure
the algorithm will converge.
* comment cleanup

Isomap Unwrapper
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* Cleanup, separate common code to function

Morph controller geometries export.
Export of mesh shape keys for Morph controller targets.

Functions to allow overriding of the color of a button. Use these functions to make the white and black color picker buttons white and black.