9fd186ac2b
Add private function mj_mulM_island for mass matrix multiplication with sub indices corresponding to one island.
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PiperOrigin-RevId: 561639405
Change-Id: I3777cea51ef22f6847b3cf3e17bdac5cf621c019
2023-08-31 06:42:33 -07:00
f34cb22bd3
Reuse sparse Dof-Dof matrix to make compressed sparse M in mj_addM.
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PiperOrigin-RevId: 556823353
Change-Id: I650ac83767d60c69859aae6e38aa331f43814378
2023-08-14 09:49:34 -07:00
2d7d5319f7
Rework sparse addM function to support compressed sparse matrices.
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Note:
- M is still a nv x nv uncompressed sparse matrix.
- NNZ precounting still needs to be implemented using the combineSparseCount helper function.
PiperOrigin-RevId: 554452710
Change-Id: I14adf58fc3acd4ed82d864d7c2e9e96ee6b0377d
2023-08-07 06:07:24 -07:00
f67e359532
Add mjtState enum and related mj_stateSize, mj_getState and mj_setState functions.
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PiperOrigin-RevId: 539667943
Change-Id: I14c34be8ce4c287e529380257b5c5bffc3ab45ce
2023-06-12 08:56:48 -07:00
81d74c56e1
Separate mj_addM into dense and sparse functions.
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PiperOrigin-RevId: 539066339
Change-Id: Ide3f9644fee46a5fb1a2e79a25be162b929e2421
2023-06-09 06:44:19 -07:00
8c7f6ce5a0
New implicitfast integrator and sparse RNE derivatives for implicit.
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PiperOrigin-RevId: 516910733
Change-Id: I29a0465c0f0b1749a73e3d7e01925200d025ddd0
2023-03-15 13:17:41 -07:00
bddc4b88b2
Fix comment typos.
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PiperOrigin-RevId: 514360878
Change-Id: If119beec09d7eae568d8f6d8e3fa150ec7de88b6
2023-03-06 06:37:42 -08:00
49dd6b4193
Clean up mj_id2name and mj_name2id.
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PiperOrigin-RevId: 514340647
Change-Id: Idf895b2d7a4a8833725afbe5c71c777081b42d9e
2023-03-06 06:36:48 -08:00
048bd43724
Fix various typos.
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PiperOrigin-RevId: 499888205
Change-Id: I38ccf9edb2a745fe8087f14b67ecccca872f7743
2023-01-05 08:29:49 -08:00
f1007df013
Implement hash map for mj_name2id using djb2 and linear probing.
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PiperOrigin-RevId: 499485127
Change-Id: I5aed6549db18b92d7c8a3b7590e50a00ce13a439
2023-01-04 07:57:55 -08:00
eb65273fa1
Add test for rotational Jacobian formula used in weld constraints
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PiperOrigin-RevId: 470947389
Change-Id: I39b9495e3e6d6cf8994e603d6eb69e3e5322e734
2022-08-30 03:42:55 -07:00
fcf4131771
Add mj_jacSubtreeCom for computing subtree center-of-mass Jacobians.
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PiperOrigin-RevId: 464075727
Change-Id: If679c0fdd05b7dc84154cec00963aeea7bbdacc3
2022-07-29 07:44:32 -07:00
64bc6d27b2
Add implicit integrator.
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Added analytic derivatives of smooth (unconstrained) dynamics forces, with respect to velocities:
- Centripetal and Coriolis forces computed by the Recursive Newton-Euler algorithm.
- Damping and fluid-drag passive forces.
- Actuation forces.
A new implicit-in-velocity integrator is implemented using the analytic derivatives. This integrator lies between the Euler and Runge Kutta integrators in terms of both stability and computational cost.
PiperOrigin-RevId: 450377010
Change-Id: Ie192b441876c22e732fb749333926f296e0a09cc
2022-05-23 01:22:15 -07:00
1913a02b40
Initial open sourcing of MuJoCo.
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PiperOrigin-RevId: 450374687
Change-Id: Ie3225a46ce095fc28ae8e63c326a640261f562bb
2022-05-23 01:08:49 -07:00
Yuval Tassa