Blender Git Loki

Fix issue reported by Sebastian Koenig on irc, Clone brush would paint
trash with float images.

Issue is uninitialized alpha in the clone brush + a clamping issue for
float images. There's still some 'swimming' and brightness issue here
but I have to do work for the weekly, will investigate further later.

Fix typo

Cycles: Fix for possibly uninitialized variable

That's rather harmless in the master, just could cause some issues with the patches.

Small fix for own commit, added new theme color defines but forgot to
actually use them, thanks to Kevin Dietrich for noticing.

UI: disable area emboss when it's maximized

Sequencer: jump now takes end-points into account

Useful because it's effectively the start-point for any strip which is obscured.

Different fix for T42262, we don't put Cycles compat into regular bl_ui files.

Correct recent commit

Cleanup: use SQUARED macro

Fix T42262: Ocean texture options cannot be edited while in Cycles

Revert "Minor typo".

This was supposed to be an experimental commit, shouldn't be in master at all, sorry for that

This reverts commit 0750e4c4c7eee9ad8f57ebf1243960bd46c7c1f9.

Fix bad typo in undo code that invalidated all image caches on undo.

Minor typo

Fix T42258: Drivers: `dimensions.x` is always invalid, but `dimensions[0]` works

'PROP_XYZ_LENGTH' subtype was missing from list of valid '.x/y/z/w' ones.

Fix T42256: Translation operator moves Child-Of constrained objects in wrong space when only using parent's rotation and parent is rotated.

Just do not use crazyspace correction with childof constraints in this case.

Note this is only a very partial fix (partial use of parent loc on some axes
is still broken in transform), a real fix would probably require a full rewrite
of constraints handling in transform code (a mere static correction matrix
just cannot work in all possible cases, we'd need a full dynamic correction system here).
Anyway, transform code as a whole is horrible. :/

Cycles: Implement an area preserving parameterization sampling for area lamps

Replace old code for area lamps which was more like incorrect with more correct
one using the following paper as a reference:

Carlos Urena et al.
An Area-Preserving Parametrization for Spherical Rectangles.
https://www.solidangle.com/research/egsr2013_spherical_rectangle.pdf

Implementation is straight from the paper, currently the rectangle constants are
calculated for each of the samples. Ideally we need to pre-calculate them.

Some comparison images are available there

http://wiki.blender.org/index.php/Dev:Ref/Release_Notes/2.73/Cycles

Reviewers: brecht, juicyfruit

Subscribers: dingto, ton

Differential Revision: https://developer.blender.org/D823

Fix T42222

Avoid using roundf function, since it's oly defined in C99

Sequencer: draw metastrip range while editing

Sequencer: maintain start/end when exiting a meta

Old behavior of shuffling the meta made it hard to use metas
in a complex edit since you couldn't be sure if exiting a meta would move it in the stack.

Fix T42247 rolling did not support the rotation value in the user
preferences.

After discussion with Campbell left the explicit angle property in for
use with NDOF devices.