Blender Git Loki

fix for rare crash at loading stored constraints

added a null pointer check so to prevent a crash atleast

minor formatting cleanup

better use smaller uvweight reset time (strange smoke movement when set too high)

reverting to original fluid solver destructor. additional guards not needed.

making sure that all python objects are garbage collected

Merge branch 'master' into cycles_panorama_experiments

Transform Manipulator: Rotation indicator (arc overlay)

Adds a arc shaped overlay indicating the current rotation value for the rotation transform manipulator.

This is still ignoring constraints, which can be fixed by calculating angle using object matrices instead of cursor position.
Seems like we could also use BLI_dial_angle here, but will check on that at some other point.
Visual design is a subject to change of course. Will add screenshots to T47032.

another fix attempt for occasional loading crashes

Use a _bvm postfix to distinguish the "gen_XXX_function" and "eval" API methods by backend.

fix, forgot to set userpointer in point constraint

Generalization of the function cache feature to support both bvm and llvm backends.

This code is not very elegant atm, but it does the job. Have to see how internal code
management of LLVM (modules) plays into this, the function cache then could become
redundant.

fix, forgot to load participating constraints per meshisland

this caused crashes when trying to simulate with percentage breaking

first customizations for using mantafow flags grid (replaces obstacle grid / array in blender)

fix attempt for crash on loading last blend (quit.blend with dynamic fracture)

Add a 'check_dir' callback to asset engines, allowing them to control current 'root dir'.

Note that this is hacked around bpyrna incapacity to handle strings as return values of functions callbacks...

crash fix for loading files with dynamic fracture enabled

forgot to set runtime listbase pointers of fractureIDs to NULL

Partial revert: Use only BVMFunction stub type as a handle for all backends.

API functions are still distinguished by backend.

Use the BVM postfix to distinguish 'Function' in bvm backend from future LLVM functions.

Fix incorrect stub type name for texnodes.

fix for occasional crashes with dynamic fracture while freeing the modifier

crash happened with scene objects which had a freed rigidbody world but didnt set the pointer to NULL.