From 2 triangles and 1 point, the relative position between the point and the first triangle is applied to the second triangle to find the target point.
the barycentric weights are calculated in 2D space with a signed area so values outside the triangle bounds are supported.
wrapped by python:
pt_to = Geometry.BarycentricTransform(pt_from, t1a, t1b, t1c, t2a, t1b, t1c)
NOTE:
- moved some barycentric weight functions out of projection painting into the math lib.
- ended up making some of the math functions use const args.
TODO:
- support exceptional cases. zero area tries and similar.
* Increase epsilon for intersection a bit more, ortho view + small
faces are problematic.
* Fix a redraw issue with one partial redraw too much at the end of
the stroke.
* Temporary workaround for sculpt not working well with small polygons,
still seems to be some issues, but can at least paint now.
* Small optimization avoiding local function variable aliasing.
adjust epsilon value for isect_ray_tri_v3()
from the comment...
/* note: these values were 0.000001 in 2.4x but for projection snapping on
* a human head (1BU==1m), subsurf level 2, this gave many errors */
- 0.000001 -> 0.00000001
* Fix remaining issues before conversion.
* Inline various vector functions, currently enabled for all platforms.
I expect this to work in GCC/MSVC at least, if other platforms don't
support it, #ifdef's can be added.
