There are enough differences between how the two are structured that
having separate implementations makes things easier to implement
despite some minor code duplication.
PiperOrigin-RevId: 875287973
Change-Id: Id49e089e5e1944291ce79e79f8cb71d048a942cc
Rename stubs.cc to mjr_compat.cc. This library acts like a
"compatibility layer" that allows the filament renderer to
be implemented behind the mjr API.
PiperOrigin-RevId: 875114054
Change-Id: I5c47581cacbcadff4c78d2ad15728cc1c3a394ad
The `mjCOctree::ComputeSdfCoeffs` function has been replaced by `mjCOctree::ComputeSdf`. The new implementation removes the dependency on the `triangle_mesh_distance` library. Instead, it uses a provided `mjCBoundingVolumeHierarchy` to perform closest point queries on the mesh. The signed distance is computed by finding the closest triangle face via the BVH and determining the sign based on the dot product of the vector from the closest point on the triangle to the octree vertex and the triangle's normal.
Optional Laplacian smoothing has been added to the SDF coefficients. This helps smooth out potential discontinuities at octree level boundaries.
PiperOrigin-RevId: 875093374
Change-Id: I6fa53243a2dda107ccf255bc6b876ca5a4554d4f
This change introduces methods to cache and load the computed stiffness matrix and nodal masses for flex elements. The cache key is generated based on material properties (Young's modulus, Poisson's ratio), interpolation order, and the bounding box of the flex. This avoids redundant expensive computations when compiling models with identical flex definitions.
PiperOrigin-RevId: 874689771
Change-Id: I6d1e299baf294a984b507e2a2602b2c068610536
Display all other elements under "Elements" or "Assets" group.
Show properties for mjSpec, mjModel, and mjData for selected
elements.
PiperOrigin-RevId: 874614195
Change-Id: I128c2bec844983ac5d35a3a0b1e58b8a5b0109cb
The logic for computing Signed Distance Function (SDF) coefficients using TriangleMeshDistance is moved from `mjCPlugin::Make` in `user_mesh.cc` to a new method `mjCOctree::ComputeSdfCoeffs` in `user_objects.cc`. This encapsulates the SDF computation within the octree class.
PiperOrigin-RevId: 874572414
Change-Id: Ia2365c9c4527a252ff1d1bb43fe2c2593761e471
The reduced dense factorization for flex interpolation now considers all DOFs in the kinematic chain of the body containing the flex, using mj_bodyChain, instead of only the DOFs directly associated with that body. This is necessary for correctly handling pinned flexes when their parent body is part of a larger kinematic structure.
PiperOrigin-RevId: 872854468
Change-Id: Idbe9fb459084dde9e8eb1076c70dbb685c1b0bdb
Add a simple GUI for it that allows users to enable/disable
the key binding as well as control some parameters.
PiperOrigin-RevId: 872816645
Change-Id: I8abb2803e17b4f6195d447220c436d4701b24db8
This change introduces a filter for flex-related contacts, ensuring that no more than mjMAXCONPAIR contacts are kept for each geom-flex, flex-flex, flex internal, and flex self-collision pair. The contacts are sorted using farthest-point sampling:
- Starts with the deepest penetrating contact
- Iteratively selects the contact farthest from already-selected contacts
- Produces a spatially distributed set of contacts
PiperOrigin-RevId: 872593388
Change-Id: I50b233a0dc66da6a297852c258ba514f131c8f23
Viscous pause is like pause but the simulation continues with zero gravity, high viscosity and passive springs disabled. It is useful to move things like cabinets with shelves---just move the shelf and the drawers come along as well.
* Updated the simulation control widgets
* Added Ctrl-space shortcut to toggle play/viscous pause
PiperOrigin-RevId: 869810053
Change-Id: Icf649e1f2631c2a64a5d2f25af9537b6a12bdf2c
* Replace various MJOPTION_ macros with a single MJOPTION_FIELDS.
* Use XVEC macro to denote vector members where there is a mixture of
vector and scalar members in a given struct type.
* Split up MJVISUAL_FIELDS into separate macros for each substruct.
* Modify engine_print.c and Python bindings struct.h/cc to use the
new X macros.
PiperOrigin-RevId: 869760513
Change-Id: Idac4fe9aa99f0258e7c79802ca9023a0d4486e2d
Most "classic" objects looked washed out. To "revert" to the old look, you can add the following to your XML files:
```
<custom>
<numeric name="filament.phong.specular_multiplier" data="0.1"/>
<numeric name="filament.fallback.scene_light_intensity" data="100000.0"/>
<numeric name="filament.fallback.environment_light_intensity" data="10000.0"/>
</custom>
```
PiperOrigin-RevId: 869725829
Change-Id: Icab0cedaa27915400497745db886c393709c14b1
Kevin Zakka