Constraints connect two rigid bodies.
Depending on which constraint is used different degrees of freedom
are limited, e.g. a hinge constraint only allows the objects to rotate
around a common axis.
Constraints are implemented as individual objects and bahave similar to
rigid bodies in terms of adding/removing/validating.
The position and orientation of the constraint object is the pivot point
of the constraint.
Constraints have their own group in the rigid body world.
To make connecting rigid bodies easier, there is a "Connect" operator that
creates an empty objects with a rigid body constraint connecting the selected
objects to active.
Currently the following constraints are implemented:
* Fixed
* Point
* Hinge
* Slider
* Piston
* Generic
Note: constraint limits aren't animatable yet).
Add read/write/interpolate functions.
In order to get rigid body point cache id from object it's now required to pass the
scene to BKE_ptcache_ids_from_object().
Rigid body cache is drawn in the orange color of the bullet logo.
Removed checks for PTCACHE_QUICK_CACHE for exception handling. This to ensure normal
cache works as if old PTCACHE_QUICK_CACHE wasn't set.
Thanks Campbell for pointing at this!
- Disabled "Quick Cache" option. It was causing ridiculous updates
on the entire animation system for start-end frame on every user
event causing changes here (like during transform). Worst was that you
couldn't transform animated objects for that reason either.
Most of the code is still there, waiting for a moment to revise it...
- Constraint "Follow Track" (marker) wasn't using inverse matrix code
in transform, making it wacko to use (wrong pivot, crazyspace)
Documentation & Test blend files:
------------------
http://wiki.blender.org/index.php/User:MiikaH/GSoC-2012-Smoke-Simulator-Improvements
Credits:
------------------
Miika Hamalainen (MiikaH): Student / Main programmer
Daniel Genrich (Genscher): Mentor / Programmer of merged patches from Smoke2 branch
Google: For Google Summer of Code 2012
Generated and UV coordinates from the duplicator of instance instead of the
object itself.
This was used in e.g. Big Buck Bunny for texturing instanced feathers with
a UV map on the bird. Many files changed, mainly to do some refactoring to
get rid of G.rendering global in duplilist code.
Issue was caused by cycles being duplicated curve objects before converting
them to mesh. This duplication will loose pointcache which resulted in object
not being properly deformed.
calling BKE_ptcache_ids_from_object() could recursively call BKE_object_handle_update(), when there is no reason to update object transforms at all. Add option not to do any updates and just return an object list.
