Blender SVN Trunk Commits

Fix for last fix, compile error in smoke code.

Fix #35407: different particle behavior compared to 2.66, reverted part of 56073.

BGE: Applying patch [#35416] "Missing python properties on ActionActuator: layer, layerWeight" from Florian Bantner (scheintodx).

Fix for [#35245] Freestyle getting stuck on view map creation + memory leaks.

There were two issues:

- Line visibility computations are very slow in the case of the provided .blend file, which gave
an impression that the rendering process got stuck. The slowness can be explained by the present
data structures used for the line visibility computations, together with the specific mesh distribution
of the test scene. At the moment Freestyle uses a regular grid in the 2D image coordinate system
to divide tris/quads into small groups in order to accelerate the line visibility computations.
On the other hand, the test scene is populated a big plane (made of one quad) and a moderately
detailed mesh object (22K tris). The scale of the latter mesh is animated from nearly zero to
about 0.2 to make the object show up over time. When the scale is nearly equal to zero, all the
tris concentrate in one grid cell, so essentially there is no performance gain from the grid data
structure optimized for speed. It looks like a better grid data structure (possibly based on
adaptive grid refinement) is necessary to genuinely address the identified performance issue. For now
the progress bar of Blender is employed to better inform users of the amount of work done in the line
visibility computations.

- A crash was caused by an excessive memory allocation request. The X and Y dimensions of the grid
data structure are determined based on the average area of mesh faces in the given scene. When the big
plane in the test scene is excluded from the rendering, the average area is almost zero (on the order
of 1e-5). As a result of this extremely small average area, the X and Y dimensions were set to a very
large number, causing a fatal memory allocation error. The present revision has introduced a hard
upper limit to the dimensions of the grid data structure to avoid this kind of numerical instability.

Cycles:
* Fix OSL compilation for scene_intersect(), when __Hair__ was disabled.

Optimizations for dyntopo
- creating faces was unnecessarily checking if they already existed.
- deleting a face did edge-lookups, when the edges are already available from the face-loops.

Fix crash due to shared paint cursor function. It is necessary to check
if we really are in sculpt mode context since the active object may be
in sculpt mode while cursor is in the 2d paint editor.

Fix for #35373, calling any paint operator from operator search menu
with mouse crashes blender.

Issue here is that paint operator invocation, immediately calls modal,
which checks if event is the same as initialization event plus keyup.
Since using the mouse on amenu calls the operator on mouse button up,
the operator ended immediately and that cause immediate cleanup and
crash,

Worked around this by forbidding the operator to finish on first modal
call (which is expected by all the asserts on invoke anyway). This
prevents the crash but requires an extra up event to end.

Also, ported part of Jason Wilkins' patch to stroke code to allow for
stroke sampling to be done before a dab is first performed and as soon
as the stroke begins

Cycles / OSL:
* Added Westin Sheen and Westin Backscatter closures for testing, useful for Cloth like effects.

Only available via OSL, added an example OSL shader to the Templates (Text Editor).

Comment out coordinates mapping made in rev55469

Such mapping only worked foe compositor output node
(with some issues btw) and failed dramatically for
nodes like previews and viewers.

For now let's behave the same way as border+crop
worked in 2.66 for until proper feature support
is ready (which could take some time).

Fixes #35313: object and ID anti-aliased masks get messed up
when using border render + crop

style cleanup

Painting / Sculpting: more tweaks to pressure sensitivity

* Also do pressure interpolation for brush size and spacing.
* Do smoothing of pressure when smooth stroke and sample average is enabled.
* Revert the OS X specific pressure change to pressure ^ 2.5, for low pressure
values like 0.05 it makes the pressure 100x lower, which is problematic. If
we need to adjust the pressure curve it should be done for all platforms.

Still weak:

* Pressure of first touch on tablet is difficult to control, usually it's low
which makes the stroke start out small or soft, but other times not. Finer
event capturing at ghost level would help, along with pressure changes without
mouse movement, but this may also need different paint stroke logic.
* Brush radius is rounded to integers, this gives noticeable stepping.
* Brush falloff is not antialiased, gives noticeable aliasing for small brush
sizes which was always a problem, but is more common with size pressure control.

Code cleanup / Cycles:
* Simplify shaperadius() function a bit to avoid castings.
* Style cleanup 1.f -> 1.0f, to follow rest of Cycles code.

Fix #35390: sequencer end frame of preview range was not drawing correct.

Fix #35404: crash in file save with python code that accesses mesh from panel.

On file save the mesh gets loads from the editmesh but the derived mesh caches
wer not cleared. This usually happens through the depsgraph but it needs to be
done manually here. Most changes are some refactoring to deduplicate derived
mesh freeing code.

Stroke code:

* Fix crash on 2d painting when no active object is present (NULL
pointer dereference in cursor drawing)
* Skip conditional on space_stroke function, since this is already
checked for on higher level.
* Interpolate pressure on spaced strokes.

bump to version '2.67a'

OSX mandtory updates after EXR version bump: OSL

OSX mandtory updates after EXR version bump: OIIO

Update OpenEXR to 2.0, dependent libs will get updated next