This helps to improve the accuracy of UV unwrapping and laplacian deform for
high poly meshes, which could get warped quite badly. It's not much slower,
doubles are pretty fast on modern CPUs, but it does double memory usage. This
seems acceptable as otherwise high poly meshes would not work correctly anyway.
Fixes T39004.
====================
The MeshDeform modifier can deform a mesh with another 'cage' mesh.
It is similar to a lattice modifier, but instead of being restricted
to the regular grid layout of a lattice, the cage mesh can be modeled
to fit the mesh better.
http://www.blender.org/development/current-projects/changes-since-244/modifiers/
Implementation Notes:
- OpenNL has been refactored a bit to allow least squares matrices to
be built without passing the matrix row by row, but instead with
random access. MDef doesn't need this actually, but it's using this
version of OpenNL so I'm just committing it now.
- Mean value weights for polygons have been added to arithb.c, a type
of barycentric coordinates for polygons with >= 3 vertices. This
might be useful for other parts of blender too.
This commit adds new underlying uv unwrapper code, intended to be
more extensible. At the moment this has a re-implementation of LSCM.
This has not been activated yet, since it doesn't add anything new.
What's new is the stretch minimize tool from tuhopuu. It works by
selecting some some uv's in the uv editor window, and then pressing
ctrl+V. The uv's on the boundary stay fixed.
More stuff will follow as I port it over & fix it.
http://crd.lbl.gov/~xiaoye/SuperLU/
This is a library to solve sparse matrix systems (type A*x=B). It is able
to solve large systems very FAST. Only the necessary parts of the library
are included to limit file size and compilation time. This means the example
files, fortran interface, test files, matlab interface, cblas library,
complex number part and build system have been left out. All (gcc) warnings
have been fixed too.
This library will be used for LSCM UV unwrapping. With this library, LSCM
unwrapping can be calculated in a split second, making the unwrapping proces
much more interactive.
Added OpenNL (Open Numerical Libary):
http://www.loria.fr/~levy/OpenNL/
OpenNL is a library to easily construct and solve sparse linear systems. We
use a stripped down version, as an interface to SuperLU.
This library was kindly given to use by Bruno Levy.
