The flex interpolation stiffness matrix within the implicit/implicitfast solvers is now built and factorized in a banded format instead of a dense one. This involves:
- Calculating the bandwidth based on the sparsity of the mass/damping matrix and the connectivity within flex cells.
- Allocating and populating a banded matrix `H`.
- Using `mju_cholFactorBand` and `mju_cholSolveBand` for factorization and solving.
This change improves performance for flexes with many DOFs but local coupling.
PiperOrigin-RevId: 901297952
Change-Id: I3efe06353d1903ea65ab30dc49685cede228bb68
This change introduces a `flex_cellcount` field to `mjModel` to specify the number of cells in each dimension for interpolated flexes. The stiffness computation, passive force calculation, and Jacobian derivatives are updated to operate on a per-cell basis, significantly improving performance by localizing computations to the nodes within each cell.
PiperOrigin-RevId: 901216393
Change-Id: Ic23132e609de11e71bb7fef8d1f139daad2ec264
This change introduces `nflexstiffness` and `flex_stiffnessadr` to allow flex stiffness matrices to have sizes other than the fixed 21 per element. Higher-order flexes can now store larger stiffness matrices based on their number of nodes. The `flex_stiffnessadr` array provides the starting index for each flex's stiffness data within the `flex_stiffness` array.
PiperOrigin-RevId: 899632263
Change-Id: Ie49182c46c3777acf0c6b492345edfcf62fb5e44
Add a new mjpEncoder plugin type mirroring the existing mjpDecoder pattern.
Encoders serialize an mjSpec + mjModel to an mjResource for a given format.
New API functions:
- mjp_registerEncoder: globally register an encoder
- mjp_defaultEncoder: zero-initialize an encoder struct
- mjp_findEncoder: look up an encoder by filename extension or content type
The mjfEncode callback takes (mjSpec*, mjModel*, mjVFS*, mjResource*) and
returns 0 on success. Writing to mjResource keeps symmetry with the decoder
reading from mjResource and leaves the door open for writable resource providers.
PiperOrigin-RevId: 889187898
Change-Id: I180771b2255b91dea188ac5e2cdc3a8f0fb85364
This CL replaces the header-parsing autowrap system for generating
MuJoCo C# bindings (MjBindings.cs) with a new generator that uses
the mujoco.introspect module. The new generator reads pre-parsed
API data from introspect's enums, functions, and structs modules
instead of parsing C headers directly.
Changes:
- New: generate_cs_bindings.py in third_party/py/mujoco/codegen/
- Updated: genrule in unity/mujoco/BUILD to use codegen
- Updated: MjBindings.cs regenerated from codegen
- Removed: entire autowrap/ directory (9 files)
- Removed: transitional validate_codegen.py
The validate test continues to verify that the genrule output
matches the checked-in MjBindings.cs.
PiperOrigin-RevId: 885206129
Change-Id: Ib9fb883a2242dd2c039033eadee7a4a6ac91ed55
Use `__SANITIZE_ADDRESS__` (GCC) and `__has_feature(address_sanitizer)` (Clang)
to define ADDRESS_SANITIZER when the toolchain doesn't provide it natively.
Fixes#3160
PiperOrigin-RevId: 884447485
Change-Id: I48ef51bca8f5c5f15f62089e73cd8fa649723636
The next release will include breaking changes, so this bumps the major
version to reflect that.
PiperOrigin-RevId: 881351265
Change-Id: I970c68a0211651c07fcb8109ebd0b138196cf50a
Adds a test which verifies that we can index into the texture buffer at offsets larger than can be represented by a 32-bit signed int.
PiperOrigin-RevId: 868756646
Change-Id: Ibc1a2b269fce41aec370611b0aab77803837e7a8
This change updates all size-related members within the `mjModel` struct from `int` to `mjtSize`. This allows MuJoCo to handle models with a larger number of elements. Corresponding changes were made to macros, function signatures, and I/O routines to accommodate the new `mjtSize` type.
PiperOrigin-RevId: 860144595
Change-Id: I701c6d607715d240766b6210a9773cd9e4258c59
This attribute allows specifying the intended output types (e.g., RGB, depth, normal) for each camera in the XML. The output types are stored as bit flags in `mjModel`.
PiperOrigin-RevId: 853316261
Change-Id: I1ad2e94102593cf402756f8f4c80509371ca86d2
Michael Moss