The flex-SDF algorithm uses the same logic as mesh-SDF. Previous to this change, the flex was instead colliding with the convex hull of the mesh generated automatically with marching cubes from the SDF.
PiperOrigin-RevId: 876420302
Change-Id: I3bf6552b6b8e108ba4c4209bbcf10fe5f2b2fd90
Deleted MAXMESHPNT farthest point sampling instead of sorting by penetration distance is now used to select the best contact points, up to mjMAXCONPAIR. Deleted MAXSDFFACE, the BVH traversal now directly calls a function to process each leaf face against the SDF, instead of collecting face indices and processing them in a separate loop. This reduces memory by removing the need to store all intersecting face indices.
PiperOrigin-RevId: 876296914
Change-Id: I8068d634e2a01ffa9357d0c5381219d097e97abe
This CL rolls back the change from changelist 794576123 since the previous version was more robust and stable. Compared to the original algorithm, this changes handles degenerate and very large triangles as well.
BEGIN_PUBLIC
Restore mesh-SDF collisions.
END_PUBIC
PiperOrigin-RevId: 875716983
Change-Id: If0de41dc7bbd60460779821d2338cf2d661f40d5
This means that two adjacent nodes can only have at most one level of refinement difference.
Note: This is a small breaking change for mjWarp since the order of the children was flipped.
PiperOrigin-RevId: 806299445
Change-Id: Ia326a31c7a8162ae02d70c868d87779198e805be
The SDF value of the closest point on the bounding box is added to the distance from the bounding box when the query point is outside of it.
PiperOrigin-RevId: 788377943
Change-Id: Id8e489a1d112918c484f5615223d557f2d14b822
Also disables mesh reorientation for meshes autogenerated with marching cubes from analytic SDFs.
PiperOrigin-RevId: 781487195
Change-Id: I36b66384f240a764823c489f78f22ba9fe32f15f
This approximation is equivalent to the exact SDF on the surface and externally, but it is smooth on the inside, rotating the gradient from radial at the box center to normal to the faces at the surface, and interpolated linearly (using two Euler angles) in between. This enables stable contact gradients for deeper penetrations.
PiperOrigin-RevId: 776574022
Change-Id: I562976e9f0535b0067aa12b2bc9d48eccb6472e9
Fixes#2573.
The correction matches the one used in MJX (see _cylinder_grad in collision_sdf.py).
PiperOrigin-RevId: 747887406
Change-Id: I1a4f1ac769adb96c98665eace7ce54fb09a7d3a2
These functions names and argument ordering are more consistent with the rest of the API.
PiperOrigin-RevId: 643788290
Change-Id: I783eda8021b80b82098e23ed95669b102bb82508
Increased tolerance above zero in nutbolt.xml since now the two parts lock otherwise. Measured speedup of 2x in this example.
This solves the issue of scale-dependent step sizes. Tested on gears with 10cm diameter and 2cm thickness.
PiperOrigin-RevId: 584009449
Change-Id: Ied2f62dbbbc592470b91cf910f3553802a57c752
The following dependencies are disabled with a cmake patch file.
- Enoki
- OpenMP
- Assimp
- FCPW
PiperOrigin-RevId: 565352386
Change-Id: Icff9de68408e0afa2032bb83b24491fc4e41d181
The SDF is defined in the `geom` frame. Using a mesh changes this frame so the inverse transformation is needed. So far the full `geom_pos` and `geom_quat` were used, which possibly contained user transformation. This CL uses the new structures which only contain transformations due to mesh processing.
PiperOrigin-RevId: 564721461
Change-Id: I6fb28001b38eaa50663427bce452cb1f05a56ac0
Use only the first `mjMAXCONPAIR` contacts in SDF-mesh collisions after sorting them using the penetration depth.
PiperOrigin-RevId: 558176217
Change-Id: Ia1ee12bd5ceb81e4c52f143831ad00426e8cf174
Kyle Bayes