Avian v0.8.0

Avian Physics 0.8 has been released! 🪶

Highlights

Avian 0.8 brings several major optimizations and improvements:

• Bevy 0.20 support: Avian now supports Bevy 0.20!
• CCD rework: The continuous collision detection (CCD) algorithm has been reworked to be more robust and avoid ghost collisions at high speeds.
• Contact recycling: Contacts are now recycled across timesteps, significantly improving collision detection performance.
• Double-precision overhaul: The f64 feature now only uses double-precision values for body positions and other world-space coordinates.
• Large-scene optimization: Scenes with hundreds of thousands of bodies now have significantly less constant overhead and spawn up to an order of magnitude faster.
• Debug rendering for SpatialQuery: Ray casts and other spatial queries performed via SpatialQuery can now be visualized with the debug renderer.

Check out the announcement blog post for a more in-depth overview of what has changed and why. A migration guide can be found here.

What's Changed

• Rename collider context types by @Jondolf in #1015
• Add AI Policy and CI Check by @Jondolf in #998
• Fast CCD without ghost collisions (Box2D-inspired) by @Jondolf in #996
• Only run CI on Ubuntu by default for Rust file changes by @Jondolf in #1016
• Switch CI to job-level skipping by @Jondolf in #1018
• Remove CI badge from README by @Jondolf in #1017
• Fix README oopsie by @Jondolf in #1020
• Minimal Use of f64 for Large Worlds by @Jondolf in #1027
• Fix rigid body and collider cloning by @Jondolf in #1029
• Decouple contacts and solver by @Jondolf in #989
• Fix non-touching contacts not moving to sleeping set by @Jondolf in #1032
• Contact Recycling by @Jondolf in #1033
• Wire up contact recycling diagnostics by @Jondolf in #1034
• Use serial iteration for small workloads by @Jondolf in #1035
• Fix Gravity doc example indentation by @rikvdk in #1031
• Skip friction for solver bias stage by @Jondolf in #1036
• Contiguous Solver Bodies by @Jondolf in #1037
• Rework collider tree optimization, fix async task pool stall by @Jondolf in #1046
• Optimize collider tree refitting by @Jondolf in #1047
• Optimize miscellaneous systems by @Jondolf in #1048
• Optimize large scenes and bulk spawning (1 million+) by @Jondolf in #1049
• Fix ObvhsAabbExt::distance_to_point_squared by @Jondolf in #1050
• Clear child ordering in Bvh2::insert_primitive_greedy by @Jondolf in #1051
• Pin CI nightly toolchain to work around rustc memory regression by @francisdb in #1060
• Fallback to scale_dyn for unknown custom shapes in scale_shape by @0xbeefd1ed in #1064
• Don't take ownership of the vertices and indices parameters in the convex_decomposition and convex_hull methods by @FredMarquer in #944
• V2: Debug rendering for SpatialQuery by @justDeeevin in #1061
• Fix stale proxy keys in collider tree by @msvbg in #1062
• xpbd: drop the absolute epsilon guard on angular Lagrange updates by @tysen in #1079
• Fix joint_damping by @tysen in #1078
• Make CustomIntegration tags derive Clone by @larsraph in #1021
• Set ContactPairFlags::STARTED_GENERATING_CONSTRAINTS to false when a collision starts by @bytemunch in #1068
• Update to Bevy 0.20 by @Jondolf in #1084
• Update to OBVHS 0.4, use new faster insertion algo by @Jondolf in #1085
• Optimize swept CCD by @Jondolf in #1058
• Fix outdated docs by @Jondolf in #1086
• Fix velocity_projection bench never compiling by @francisdb in #1040
• Use i32 for manifold count changes by @Jondolf in #1087

New Contributors

• @rikvdk made their first contribution in #1031
• @francisdb made their first contribution in #1060
• @0xbeefd1ed made their first contribution in #1064
• @FredMarquer made their first contribution in #944
• @justDeeevin made their first contribution in #1061
• @msvbg made their first contribution in #1062
• @tysen made their first contribution in #1079
• @larsraph made their first contribution in #1021
• @bytemunch made their first contribution in #1068

Full Changelog: v0.7.0...v0.8.0