The implicit integrator was not correctly accounting for the off-diagonal coupling terms between flex and non-flex (parent) degrees of freedom in the mass matrix. This change extracts these coupling terms during the factorization step and applies a correction to the flex forces before solving for the flex accelerations, ensuring that the parent accelerations influence the flex dynamics. A new test verifies that the implicit integrator now matches Euler for small timesteps in a model with flex-parent coupling.
PiperOrigin-RevId: 868098126
Change-Id: Ia8cccd7dd428cd0c0898e1663a7e41017a2311b2
FuseStatic deletes static (joint-less) bodies and reassigns their
children to the parent body. Geoms and sites were reassigned, but
cameras and lights were not, leaving dangling body pointers that
crash in mjCCamera::Compile() / mjCLight::Compile().
Add camera and light reassignment in FuseStatic and FuseReindex.
File resolution only checks local file system. Resource providers may still
be able to load from a path even if it is not resolved.
PiperOrigin-RevId: 867534134
Change-Id: I802566136b965ad839393f56a4d4924dda2e1973
The functions and associated tests related to managing time-stamped data buffers have been renamed from `mju_delay*` to `mju_history*` to better reflect their general purpose beyond just handling delays.
PiperOrigin-RevId: 866978339
Change-Id: I8655e91bce783287ad2adc412d13a1c39aa2c322
Use stat() instead of d_type to check if a file is a regular file
when scanning for plugin libraries. This allows symlinked plugins
to be loaded, which is common in ROS 2 workspaces built with
colcon build --symlink-install.
The stat() approach also handles filesystems that report DT_UNKNOWN
for d_type (e.g., NFS, XFS), making the code more robust.
Fixes#3072
The single array attribute `mjc:polycoef` has been replaced by five individual double attributes: `mjc:coef0`, `mjc:coef1`, `mjc:coef2`, `mjc:coef3`, and `mjc:coef4`.
PiperOrigin-RevId: 865947359
Change-Id: If9d14a77b0a06e5dc712eeadd6e9402411570706
Fix a crash and dimension mismatch issue in user_flexcomp when dealing with interpolated="true" meshes that contain unused vertices. Previously, vertbody would correspond only to used vertices while vert included all vertices, leading to assertions or out-of-bounds access. Also enable node pinning for interpolated meshes.
PiperOrigin-RevId: 865881995
Change-Id: Id150f00f22b5f48896ffbffddf03c57b252de8c0
Otherwise, if you try to open a random file in studio, it will crash.
PiperOrigin-RevId: 865372002
Change-Id: I96d3121b6de792daaff53155ea2436ac3f6668db
Initialize the EGL context in the Renderer when using the classic
rendering engine with no window.
PiperOrigin-RevId: 864884976
Change-Id: Ic6cc4637855a361e41f3bfb4b738c012ec93711f
The BM_CompileManyTextures benchmark temporarily sets the MuJoCo cache capacity to 0. This change ensures that the original cache capacity is restored after the benchmark completes, preventing side effects on other tests.
PiperOrigin-RevId: 864332653
Change-Id: I5f756e30d4922d5e6f9b70d19ba9d0e31cde9259
Alessio Quaglino