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New implicitfast integrator and sparse RNE derivatives for implicit.

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PiperOrigin-RevId: 516910733
Change-Id: I29a0465c0f0b1749a73e3d7e01925200d025ddd0
This commit is contained in:
Yuval Tassa
2023-03-15 13:16:45 -07:00
committed by Copybara-Service
parent 056e849273
commit 8c7f6ce5a0
23 changed files with 961 additions and 332 deletions
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include/mujoco/mjdata.h
+5 -2
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@@ -270,14 +270,17 @@ struct mjData_ {
mjtNum* subtree_linvel; // linear velocity of subtree com (nbody x 3)
mjtNum* subtree_angmom; // angular momentum about subtree com (nbody x 3)
// computed by mj_Euler
// computed by mj_Euler or mj_implicit
mjtNum* qH; // L'*D*L factorization of modified M (nM x 1)
mjtNum* qHDiagInv; // 1/diag(D) of modified M (nv x 1)
// computed by mj_implicit
// computed by mj_resetData
int* D_rownnz; // non-zeros in each row (nv x 1)
int* D_rowadr; // address of each row in D_colind (nv x 1)
int* D_colind; // column indices of non-zeros (nD x 1)
int* B_rownnz; // non-zeros in each row (nbody x 1)
int* B_rowadr; // address of each row in B_colind (nbody x 1)
int* B_colind; // column indices of non-zeros (nB x 1)
// computed by mj_implicit/mj_derivative
mjtNum* qDeriv; // d (passive + actuator - bias) / d qvel (nD x 1)