Blender Git Loki

_Finally_ got the conversion from old multires files to the new kind working. Still some cleanups to do, and a couple of performance fixes, but it works OK now.

Only do multires mode in sculptmode if multires is the last modifier on the stack. Otherwise, treat it like a regular modifier.

Multires doesn't update itself outside of sculptmode now, so switching levels is somewhat faster outside of sculptmode.

Cleanup and refactoring. Removed some duplicate code.

Fixed partial redraw sculpting for multires.

Fixed a crash in sculptmode after applying a mulitres modifier.

Fixed the pageup/pagedown sculptmode shortcut keys for switching multires levels.

Removed old multires file write code.

Removed mdisps from the default customdata of derivedmeshes since it's no longer needed. Fixes putting, e.g., a smooth modifier after multires.

Merged with r15805

Somewhat hacky support for undo in sculptmode; does a copy of MVert DerivedMesh data when pushing undo, but not for regular save/load.

More speed/memory improvements to multires update.

Reduced the multires memory usage a bit during level creation and level update.

Removed some unneeded data copies made in MultiresDM.

Removed some unused data/functions from the MultiresDM

Minor cleanup of some unused multires data

Fix joining of multires meshes. The resulting mesh always has all the displacements -- if the mesh being joined to didn't have multires, it will once it's joined with a multires mesh.

Fixed rendering multires meshes. Also removed some more old multires code formerly used in rendering.

Added a reshape button to the multires modifier. It copies the vertices from another selected mesh into the current level. Allows indirect editing of multires levels other than the base in editmode, and more importantly allows for editing multires levels in other programs. Of course, vertex order and overall topology must match. Additionally, the copy is only exact for the first and last level. All other levels will do the usual catmull-clark subdivision.

Added a copy function for the multires modifier, so duplicating a mesh with multires works now.