Blender Git Loki

add python access to mathutils.intersect_line_plane, update view3d_utils module to use it.

added math function isect_line_plane_v3(), use for window_to_3d rather then having it inline.

Merged changes in the trunk up to revision 36757.

fix [#27158] Appending crash with preview.
* fixed incorrect reading of PreviewImage struct from .blend
* fixed memory leak, PreviewImage data wasn't correctly free'd

Cycles: get rid of (+) icon for region open, all regions already accesible
through shortcut key or view menu.

Cycles: 3d view tool properties entry in view menu.

use window_to_3d for armature_click_extrude operator.

window_to_3d() wasn't working at all (only used by grease pencil/path conversion), now works in ortho and perspective view, initgrabz() is no longer needs to be called first.

there wasn't a good way to know if a RegionView3D was perspective or not (without having the View3D too and checking its camera values), added struct member 'is_persp', set with the view matrix.

fix for python module region_2d_to_vector_3d and region_2d_to_location_3d functions in ortho mode.

python mathutils.Matrix.is_orthogonal readonly attribute.

UI: fix access of freed memory in buttons handling code.

Cycles: svn merge -r36495:36747 https://svn.blender.org/svnroot/bf-blender/trunk/blender/

RNA: some compile fixes for C/C++ api.

RNA: make mechanism used by operators to keep python instance alive more generic, to be used by render engine later.

RNA: pass Main rather than Context to register/unregister callbacks.

Render API: some code refactoring related to errors and render view.

fix remaining crash from [#27035] 3 problems: crash and enum "REGION" not found in ('VERTS')

fix a crash when getting the value of an enum.

fix for one of the issues in [#27035] 3 problems: crash and enum "REGION" not found in ('VERTS')
now constraint macro argument shows as 'NORMAL' rather then '<UNKNOWN ENUM>'