Resolved What is the proper way to perform a multithreaded Capsule Collider using DOTS?

My question is the following:

• What is the proper way to perform a multithreaded Capsule Collider cast using DOTS?

My objective is the following:

• Perform a series of collision casts before moving the player character to determine valid move locations.

Details:

I am trying to cast a capsule collider within a Entities.ForEach() loop.

The error I get is usually some variation of the following message:

EntityBodyIndexMap is not declared [ReadOnly] in a IJobParallelFor job. The container does not support parallel writing. Please use a more suitable container type.​

The problem is solved if I invoke the method call Schedule() rather than ScheduleParallel() at the end of the ForEach loop, while isolating the CollisionWorld and PhysicsWorld references outside the ForEach loop.

 

Please try adding .WithReadOnly(world) before .ForEach, that should make the world read-only. Docs are here: https://docs.unity3d.com/Packages/c...ecs_entities_foreach.html#capturing-variables

 

SOLVED SOLUTION

Thank you! This did the trick!

For future folks interested in the solution, here it is:

Code (CSharp):

1. World world = World.DefaultGameObjectInjectionWorld;
2. BuildPhysicsWorld buildPhysicsWorld = world.GetExistingSystem<BuildPhysicsWorld>();
3. PhysicsWorld physicsWorld = buildPhysicsWorld.PhysicsWorld;
4. CollisionWorld collisionWorld = physicsWorld.CollisionWorld;
5.          
6. Entities.WithReadOnly(collisionWorld).ForEach((Entity e,  ref Translation translation, ref Rotation rotation) =>
7. {
8.     // Your code here for casting colliders
9.     ColliderCastHit hit = new ColliderCastHit();
10.     bool haveHit = collisionWorld.CastCollider(c, out hit);
11. });