What's new in Unity Physics 1.0

This is a summary of the changes in Unity Physics version 1.0.

For a full list of changes, see the Changelog. For information on how to upgrade to version 1.0, see the Upgrade guide.

Added

  • Motors: For all 4 motor types, added a new field for the maximum impulse that the motor constraint can exert.
  • Licence warning pop-up: adding the com.havok.physics package in your project without the Unity Pro, Enterprise or Unity Industrial Collection license will prevent you from simulating Havok Physics in the editor and builds.
  • [CreateBefore(typeof(BroadphaseSystem))] for PhysicsSimulationPickerSystem within UnityPhysicsSimulationSystems.cs script file.
  • Reference to com.unity.render-pipelines.universal version 10.7
  • New shaders in the sampler that are SRP batcher and universal render pipeline compliant.
  • New struct - Unity.Physics.Math.ScaledMTransform: Provides the same utility as Unity.Physics.Math.MTransform but supports uniform scale.
  • Operator which converts a float4 into a Unity.Physics.Plane.
  • PhysicsComponentExtensions.ApplyScale(in this PhysicsMass pm, in Scale scale) - an extension method which scales up the PhysicsMass component.
  • Multiple extension methods have received a version which takes a Scale argument, you can see the full list at the Changelog.
  • bool OverlapAabb(OverlapAabbInput input, ref NativeList<int> allHits) has been added to PhysicsWorld.
  • SimulationSingleton IComponentData is added.
  • PhysicsWorldSingleton IComponentData is added. It implements ICollidable and has access to the stored PhysicsWorld and its utility methods.
  • NativeReference<int> HaveStaticBodiesChanged get property is added to BuildPhysicsWorld.
  • Multiple new system groups are introduced: like the PhysicsSystemGroup , see the full list at the Changelog.
  • Impulse events to allow users to break joints.
  • Supports the following types of motors: rotational, linear velocity, rotational, angular velocity.
  • CustomPhysicsSystemGroup and CustomPhysicsSystemGroupBase for providing multiple worlds support.
  • CustomPhysicsProxyDriver IComponentData, with it's authoring (CustomPhysicsProxyAuthoring) and a system (SyncCustomPhysicsProxySystem), which enable you to drive an entity from one world by an entity from another, using kinematic velocities.

Updated

  • Naming path for Unity Physics Authoring components are now under Components > Entities > Physics.
  • Use of the new idiomatic foreach statement inside of the physics package replacing the old Entities.ForEach API.
  • All materials in the samples to be universal render pipeline compliant.
  • Restored many Gizmo/Mesh methods from DisplayCollidersSystem.cs, but placed in a Utility file instead.
  • Changed allocator label to Allocator.Temp internally when building CollisionWorld from CollisionWorldProxy.
  • Physics Debug Display: Performance improvements when drawing colliders (faces, edges, AABBs), broadphase, mass properties and contacts.
  • Physics Debug Display: Drawing collider faces for Mesh and Convex Hull types use different rendering methods.
  • Physics Debug Display: The original Collider Edge drawing code that uses Gizmos has been moved to class 'DisplayGizmoColliderEdges' and to class 'AppendMeshColliders'.
  • Using built-in resources for the reference mesh used by cube and icosahedron.
  • Resources/ (used by Debug Draw) has been renamed DebugDisplayResources/ and now loads assets differently.
  • Removed use of the obsolete AlwaysUpdateSystem attribute. The new RequireMatchingQueriesForUpdate attribute has been added where appropriate.
  • ColliderCastInput now has a property QueryColliderScale. It defaults to 1.0f, and represents the scale of the passed-in input collider.
  • ColliderCastInput constructor has changed to take in uniform scale of the query collider as the last parameter. It defaults to 1.0f.
  • The following methods have a uniform scale argument added as the last argument (defaults to 1.0f), and their arguments are reordered. The old versions are deprecated, see the full list at Changelog.
  • BuildPhysicsWorld is now a struct instead of a class, and implements ISystem instead of SystemBase.
  • ExportPhysicsWorld is now a struct instead of a class, and implements ISystem instead of SystemBase.
  • Multiple PhysicsWorldBuilder. signatures have changed, see Changelog.
  • PhysicsWorldData.HaveStaticBodiesChanged is now a NativeReference<int> instead of NativeArray<int>.
  • PhysicsWorldData.PhysicsWorldComponentHandles struct is added. It contains component handles to data types needed to create a PhysicsWorld.
  • PhysicsWorldData also has an Update(ref SystemState) method which just calls Update(ref SystemState) on PhysicsWorldComponentHandles.
  • Multiple PhysicsWorldExporter. signatures have changed, see Changelog.
  • The Joint Constraints container changed from FixedList128 to a custom internal container. Users will get a FixedList512 returned when retrieving constraints.
  • Replaced obsolete EntityQueryBuilder APIs with current ones.
  • ISystem implementations with public data converted to using components for data access.

Removed

  • Dependency on com.unity.jobs package has been removed.
  • Dependency on com.unity.test-framework.performance package has been removed.
  • Removed ICollider.CalculateAabb(RigidTransform transform). All ICollider implementations will still be able to call CalculateAabb(RigidTransform transform, float uniformScale = 1), except RigidBody, PhysicsWorld and CollisionWorld, where these methods are deprecated.
  • Removed CollisionWorldProxy. Use PhysicsWorldSingleton to achieve the same functionality.
  • Simulation callback mechanism has been removed. Find removed APIs at Changelog.
  • Removed PhysicsWorld getter from BuildPhysicsWorld. It is still possible to get a PhysicsWorld reference through BuildPhysicsWorld.PhysicsData.PhysicsWorld but it isn't recommended since it can cause race conditions.
  • Removed StepPhysicsWorld system.
  • Removed EndFramePhysicsSystem system.
  • Removed BuildPhysicsWorld.AddInputDependencyToComplete() from public API.
  • Removed BuildPhysicsWorld.AddInputDependency() method.
  • Removed BuildPhysicsWorld.GetOutputDependency() method.
  • Removed ExportPhysicsWorld.AddInputDependency() method.
  • Removed ExportPhysicsWorld.GetOutputDependency() method.
  • Removed static class PhysicsRuntimeExtensions, as a consequence, some extension methods are removed as well, see Changelog.
  • Removed PhysicsWorldExporter.SharedData struct.
  • Removed PhysicsWorldExporter.ScheduleCollisionWorldProxy() method.
  • Removed PhysicsWorldExporter.ScheduleCollisionWorldCopy() method.
  • Removed PhysicsWorldExporter.CopyCollisionWorldImmediate() method.
  • Removed PhysicsWorldStepper class.

Further information