mj_contactFilter removed geom pairs where their bodies share the same weldid, but this check can be applied at broadphase instead of at geom-geom level.
PiperOrigin-RevId: 507435848
Change-Id: Ia37c741071dc5e1c26686dd319f42c9bd334d305
Sometimes broadphase returns the same body pair multiple times. In those cases, avoid creating every contact twice.
PiperOrigin-RevId: 499869235
Change-Id: I58606168b0723d40b4fdd43b1fafad79bf35d76d
- Add private function `mj_arenaAlloc`. This is used internally to allocate memory from the arena.
- Add private function `mj_nefc` to count constraints. This function returns a tight upper bound on `d->nefc`. The number of counted constraints can be slightly bigger than exact `d->nefc` in the case of constraints with empty Jacobian, as when placing a frictional tendon between two world sites.
- Add new `memory` attribute to the `size` XML element for specification of arena memory size. This attribute is mutually exclusive with `nstack` and `njmax` specifications, which are now deprecated (but left around for the time being for legacy compatibility).
- Move `d->stack` to the end of the new arena space. The stack now grows in reverse from the end.
PiperOrigin-RevId: 479341539
Change-Id: Ie019c202e0908577ffc6f833a37920858116f667
Kyle Bayes