Blender Git Loki

added material handling (so meshislands get correct materials from original objects) and added plastic tolerance values, which are taken into account with special simulation mode only.

reduced a performance bottleneck when adding many constraints in a loop, do not trigger modifier updates or set validate flags or even call bullet functions... but todo is to keep a useful update mechanism

avoid resetting cache (and iterating possibly through the rigidbody group) when adding mesh constraints

attempt to make mesh island packing faster when being called in a loop, create the dm only once after packing

crash fix in FM refresh operator (null pointer access)

rigidbody type on meshisland should be taken into account now properly and be settable, also adding new constraints should happen faster now (when called in a loop)

further attempt to fix "plastic constraint" logic (external fracturing mode only)

implemented some special constraint breaking method further (plastic constraint breaking), for external fracturing mode

exposed per-constraint breaking angle and distance to python (for external mode only, for now)

fixed constraint restore with external fracture mode (using participants instead of jumping around in list, which messes up the iteration loop)

constraints transformation fix, transformations are updated on validation now

first successful simulation attempt with a bigger test data set, todo... set constraints relative to object , multiply with obmat during evaluation

extended FM python API: constraints have now settable locations and rotations, additionally there is an highly experimental constraint breaking mode (for external fracture mode ONLY)

initial, basic python API for Fracture Modifier contents: mesh_islands and mesh_constraints are createable, removable externally prior to running the simulation (in special "External" fracturing mode) so you can pack objects into the modifier (as mesh islands) and set constraints to connect them. This can happen in immediate update mode or updating is done via refresh operator. You can also have read access for island data after simulation, to dump the results.

added activation by force, if force exceeds an adjustable threshold, kinematic rigidbodies get activated / triggered by a force field

set shards to passive if shard weight (average vertex weight) is > 0.0f instead of 0.5f, this allows to keep shards passive in case they dont get enough weightpaint (in case they are inside, and interpolation of weights is not enough)

fixes: lower stability factor now lets the object break earlier ( effect was inverted) and added uv_layer to fracture presets (was missing)

taking stability factor now into account at dummy constraint calculation for compounds, it influences search radius and limit now, too

attempt to get more control over compound destruction behavior during simulation, with stability factor; recursive breaking of neighborhood happens if one connection breaks

partial fix for displacement / autohide flicker problem, happens now only with automerge (occasionally) and with automerge + fix normals (regularly), but for displacement and glass you mostly need only autohide; automerge and fix normals are for smooth objects where cracks should be nearly invisible (after fracturing)