Blender Git Loki

Merged with trunk: 32509-33092

Merge with trunk: 31359-31956

Merged with trunk: 30832-31359

* Fix: clay strips brush was exploding
* Fix: was initializing front face angle using degrees instead of radians

== Layer Modifier Brushes ==

For all tools that it makes sense for, the 'Use Layer' modifier allows you to set a limit on how far a vertex moves which creates a layering effect.

Also, added a slider to control how thick a layer is.

Also, Fix #23192, where layers were not working with symmetry.

After testing more will apply to trunk.

== Gravity Modifier ==

Any tool can have gravity applied as a modifier. It works similarly to autosmooth.

== Gravity Tool ==
preliminary gravity tool

== Adjustable Angle for Front-Face Only ==

* Fix: trim is now a lot smoother
* Fix: space stroke regressed due to changes for adaptive spacing

* Fix: random rotation wasn't working in wrapped texture mapping mode

* Fix: made 'Feather' option per brush instead of global

More fixups for sculpt plane sample range

* Fix: some changes needed to make a new brush did not make it into previous commits.

== Sculpt Plane Sample Range ==

Adjusting the sculpt plane sample range allows for finer control of planar brushes and the grab brush.

1 samples all vertexes inside the brush, values less than 1 sample a smaller region, values greater than 1 sample a larger region.

* forgot to enable adaptive spacing for all brush tools

* Rewrote adaptive space code to try and find a bug. Turns out the bug wasn't in adaptive space, it was an old bug associated with 'front-faces only' Keeping the rewrite for now though.

== Adaptive Spacing ==
Spacing takes into account the angle of the surface relative to the view port and reduces the spacing accordingly.

* various fixes to the presentation of overlays in the UI

* Fix: some sculpt tools were not working with new wrap texture mapping mode
* Fix: anchored stroke cursor was not drawing properly

== Texture Overlay for Wrap Texture Mode ==

* Wrap mode now has a texture overlay.

* Also, wrap texture mode has been enabled for all tools now, but it does not seem to be working properly for all of them as of yet.

startup.blend.c got corrupted by a previous merge