0.3.4

This minor release mainly introduces first-class sensor support (IMU, Contact Sensor, LiDAR, Depth camera and more), incl. recording and plotting facilities. The rigid-rigid hydroelastic contact model has also been added. As usual, a fair share of bugs have been fixed, with unit test coverage gradually improving.

Behavior Changing

• Support rendering deformable body for batched env. (@YilingQiao) (#1697)
• More sensible defaults for camera far, near. (@duburcqa) (#1678)
• Fix invweight and meaninertia not always considering scale and dofs armature. (@duburcqa) (#1696)

New Features

• Refactor 'FrameImageExporter' to improve performance and support normal & segmentation. (@duburcqa) (#1671)
• Add support of normal & segmentation for Madrona Batch Rendering. (@ACMLCZH) (#1563)
• Add 'noslip' optional post-processing step to suppress slip/drift. (@YilingQiao) (#1669)
• Add first-class data recorders and plotters. (@Milotrince) (#1646, #1718)
• Add rigid-rigid hydroelastic contact model. (@Libero0809) (#1572)
• Add option to display sensor information in the interactive viewer. (@Milotrince) (#1770)
• Add support of differentiable contact detection (Work In Progress). (@SonSang) (#1701)
• Add Raycaster sensor (Lidar and DepthCamera). (@Milotrince, @duburcqa, @jgillick) (#1726, #1772, #1809, #1815)
• Add full support gstaichi ndarray to Rigid Body solver. (@YilingQiao, @SonSang, @duburcqa) (#1674, #1682, #1683, #1690, #1693, #1695)
• Add full support gstaichi fast caching mechanism. (@hughperkins, @YilingQiao) (#1709, #1720, #1730, #1812)

Bug Fixes

• Fix data races in getting contact and equality constraints. (@YilingQiao) (#1676)
• Fix MPM muscle activation. (@YilingQiao) (#1692)
• Fix non-flat terrain support. (@Kashu7100, @YilingQiao, @duburcqa) (#1691, #1777, #1779)
• Disable mesh processing when loading URDF for consistency. (@duburcqa) (#1708)
• Fix segfault at exit when running viewer in background thread with offscreen cameras. (@duburcqa) (#1703)
• Fix all the example scripts. (@YilingQiao, @duburcqa) (#1743, #1773, #1724, #1785, #1787, #1801, #1804)
• Fix logics for duplicating collision geometries as visual in MJCF. (@hokindeng, @duburcqa) (#1732, #1750)
• Randomize uniform terrain along both axes. (@jgillick) (#1747)
• Fix contact sensors always returning zeros. (@Milotrince) (#1761)
• Fix LBVH stuck in infinite loop for small number of AABBs. (@duburcqa) (#1766)
• Fix broken interactive viewer backend fallback mechanism. (@duburcqa) (#1797)
• Fix camera follow entity. (@duburcqa) (#1805)
• Fix compound joints for 'set_dofs_position'. (@duburcqa) (#1678)
• Fix some mesh-related issues (@ACMLCZH) (#1800)

Miscellaneous

• Fix support of 'pyglet<2.0'. (@Kashu7100) (#1670)
• Add vision-based manipulation example (@yun-long) (#1493)
• Reduce max_collision_pairs to save memory (@YilingQiao) (#1672)
• Remove 'gs clean' utility. (@duburcqa) (#1723)
• Rename 'get_aabb' in 'get_AABB' and add deprecation warning. (@duburcqa) (#1778)
• Improve interactive viewer performance. (@duburcqa) (#1784)
• Raise exception in cause of particle sampling failure. (@duburcqa) (#1792)
• Remove 'is_free' that was confusing and partially redundant with 'is_fixed'. (@duburcqa) (#1795)