Issues

• Soft-body tearing is O(torn elements × body size): every particle split rescans the whole body

  dimforge/rapier#1035 · Filter by author ahvonenj opened on Oct 10, 2026

• Explain ground detection and snap contact reporting

  dimforge/rapier#1031 · Filter by author borovan opened on Oct 3, 2026

• Debug assertion in the incremental solver-contact graph when a ball rolls on a Voxels collider

  dimforge/rapier#1029 · Filter by author shtse8 opened on Sep 30, 2026

• Add SpringJoint::set_rest_length

  dimforge/rapier#1026 · Filter by author sermuns opened on Sep 29, 2026

• Request for more feature flags

  dimforge/rapier#1024 · Filter by author frankieali opened on Sep 26, 2026
  1

• Collider reparenting retains the old parent's inherited enabled state

  dimforge/rapier#1023 · Filter by author peachtree0222 opened on Sep 26, 2026

• Rejected multibody insertion leaks topology and accepts a same-body self-joint

  dimforge/rapier#1022 · Filter by author peachtree0222 opened on Sep 26, 2026

• ColliderSet::set_parent partially commits an invalid body handle and panics on step

  dimforge/rapier#1021 · Filter by author peachtree0222 opened on Sep 26, 2026

• solve_character_collision_impulses can launch light bodies: one ordinary push leaves a box at 44× the character's speed

  dimforge/rapier#1020 · Filter by author mcp-tool-shop opened on Sep 26, 2026

• KinematicCharacterController loses a step's horizontal motion on flat ground when the hit normal is (0, 1 − 2⁻⁵³, 0)

  dimforge/rapier#1019 · Filter by author mcp-tool-shop opened on Sep 25, 2026

• Coupled angular spring joints still do not work

  dimforge/rapier#1011 · Filter by author funmaker opened on Sep 23, 2026

• KCC: panic in solve_single_character_collision_impulse when pushing a collider whose parent body isn't registered yet (0.35)

  dimforge/rapier#1009 · Filter by author nazgull08 opened on Sep 19, 2026
  1

• PhysicsPipeline::step hangs in join_deferred_bvh_optimize with parallel enabled

  dimforge/rapier#1008 · Filter by author lelierre-dev opened on Sep 10, 2026
  1

• Expose static contact softness in the JavaScript bindings

  dimforge/rapier#998 · Filter by author stephenenglish opened on Aug 23, 2026

• npm version number desynced?

  dimforge/rapier#997 · Filter by author cubecull opened on Aug 21, 2026

• Voxel-ball bugs - ghost collisions and non-collisions

  dimforge/rapier#993 · Filter by author fenomas opened on Aug 16, 2026

• TypeScript: dynamic-state snapshot for rollback netcode (takeSnapshot is ~19x larger than a rollback needs)

  dimforge/rapier#991 · Filter by author jounih opened on Aug 15, 2026

• TypeScript: World.restoreSnapshot() leaks ~1730 bytes per call regardless of world size

  dimforge/rapier#990 · Filter by author jounih opened on Aug 15, 2026
  3

• Typo in the docs

  dimforge/rapier#986 · Filter by author draymone opened on Aug 13, 2026

• 2D: RuntimeError "unreachable" in World.step() when a ball settles against ConvexPolygon bodies (deterministic repro, 25/25 crashes)

  dimforge/rapier#985 · Filter by author IMMECS opened on Aug 12, 2026
  3

• CCD between fast moving dynamic objects tunnel

  dimforge/rapier#984 · Filter by author Ughuuu opened on Aug 9, 2026

• Bug with AccelerationBased coupled linear axes motor in 2D

  dimforge/rapier#949 · Filter by author Schnorg opened on Jun 16, 2026

• rapier3d-urdf: allow loading a robot at a non-zero initial joint configuration

  dimforge/rapier#942 · Filter by author cogeor opened on Jun 4, 2026

• Softness does not support per limit settings, Force Based, or Stiffness and Damping

  dimforge/rapier#940 · Filter by author Schnorg opened on Jun 4, 2026

• Godot 6DOF joint needs a swing twist joint with pyramidal constraint

  dimforge/rapier#937 · Filter by author Schnorg opened on May 31, 2026