Blender Git Loki

Cycles / Fresnel:
* Avoid redundant assignment and use correct Normal for Ray Differentials.

Cycles / Hair:
* Fix a condition in the hair BVH code.

BLI_math rename functions:
- mult_m4_m4m4 -> mul_m4_m4m4
- mult_m3_m3m4 -> mul_m3_m3m4

these temporary names were used to avoid problems when argument order was switched.

the viewport align-active option was flipping the viewport direction,
now you can add an object, enable align to view, then align the view back to the object without flipping.

Fixed own error: used wrong iteration count for cleaning weight groups

Cycles / OSL:
* Rename fresnel_dielectric() to fresnel_dielectric_cos() to match SVM, easier when searching code.
* Also remove an old code comment in bsdf_reflection.h from Cycles branch days.

Various fixes. Tested with OpenSuse 12.3 (amd64).

code cleanup: typos

bmesh: replace BLI_array reallocs with alloca, also don't check all faces for connecting verts.

code cleanup: quiet pedantic warning in array macro.

fix for incorrect type casting when checking macros exec() functions.
infact this worked by accident, but didn't crash.

Live resize on Windows. Based on Ton's patch for mac.
Removing old resize stuff.
Windows has resize lag, which creates black gap with openGL. Still looking to fix it.

bmesh: replace array reallocation with a single face array and use STACK macros.

bmesh: copy function - replace use of array reallocations with alloca in a static function.

Simple usability fix:

Mesh editmode, active face was always drawing same stipple pattern color,
whether face is selected or not.
Now it uses selection color + stipple. Looks much more consistent.

Some cleanup/reorganisation, and:
* Script should now remove relevant dirs in $INST when a package becomes suitable
* Script systematically runs relevant ldconfig commands when building boost/oiio

Solving ancient Blender window sizing issue;

- Removed grid-snapping for area coordinates on scaling windows.
That caused the areas to shrink or expand, and eventually corrupt screen layouts.

- Added simple but efficient life resize for OSX. I need to know why this is so much
code for Windows... I suggest Windows to just copy same method; dispatch the queue,
and just let the event system draw.

Cycles / Wireframe node:
* Make sure we have valid geometry data, fixes a crash with Lamp objects.

Reported by lichtwerk in IRC, thanks!

Bug fix, irc submitted:

3D Viewport render (internal) didn't render bump maps (it was black even).

bmesh: optimize iterator size using a union for iterator specific data.
on 64bit system reduces the struct to 64bytes, was 120, also avoids initializing unused values.