An unusual case that CharacterController throw AssertionException

when my character stuck here:

stack trace:

 

Hey, it would be great if you could provide the input to the CollideAndIntegrate() call (stepInput, characterMass, transform and linearVelocity) for us to look into it with more details.

Some character fixes are scheduled for the next release and some of them are targeting this sort of scenarios, but I'd like to be sure.

 

LinearVelocity is NaN could be the causing, hope this help:

 

Great, we will need to unroll this further. Can you find out what produces these NaN values in the LinearVelocity? My guess is that it's CalculateMovement() method. Especially if the state is Supported while surfaceNormal is (0,0,0). Let me know and I can provide you with a workaround until the fix is released!

 

Yes, you are right about zero-surfaceNormal.

 

I think my MODIFY 3 can fix it:
https://forum.unity.com/threads/sam...aracter-controller-issue.796011/#post-5301360

 

Exactly, use @linfuqing's modify 3 and it will go away. This is fixed in the coming release.

 

I'm also getting an AssertionException from CheckSupport.

CollideAndIntegrate inputs are...

stepInput: CharacterControllerUtilities+CharacterControllerStepInput
linearVelocity: float3(0f, -3.279998f, 0f)
transform: RigidTransform((0f, -0.2615776f, 0f, -0.9651824f), (0f, 8.653604f, 0f))
characterMass: 1​

CheckSupport output are...

stepInput: CharacterControllerUtilities+CharacterControllerStepInput
surfaceNormals: float3(0f, 0f, 0f)
supportedState:Unsupported
surfaceVelocity:float3(0f, 0f, 0f)​

The error throws when the falling ball hits meshCollider.
The ball is standard conversion with shape and kinematic body.
The mesh collider is created with...

Code (CSharp):

1.  
2. CollisionFilter filter = new CollisionFilter
3.             {
4.                 BelongsTo = ~0u,
5.                 CollidesWith = ~0u,
6.                 GroupIndex = 0
7.             };
8.              var meshCollider = Unity.Physics.MeshCollider.Create(vertices.AsArray(), triangles.AsArray(), filter);
9.             var physicsCollider = new Unity.Physics.PhysicsCollider { Value = meshCollider };
10.             PostUpdateCommands.AddComponent<PhysicsCollider>(entity, physicsCollider)
11.  

I tried's linfuqing's MODIFY 3, but no change.
Not seeing NaN's anywhere.

I'm using the code form the ECSSamples repo.
DOTSample looks newer, but coupled to netcode work.

 

Update.
No errors when doing the regular ConvertToEntity workflow with PhysicsShapeAuthoring component.
However, it throws with a custom MeshCollider like below...

Code (CSharp):

1.  
2. public class CustomMeshColliderSystem : ComponentSystem
3. {
4.  
5.     protected override void OnUpdate() {}
6.  
7.  
8.     protected override void OnCreate()
9.     {
10.         EntityManager em = World.Active.EntityManager;
11.         Entity e = em.CreateEntity();
12.  
13.         CollisionFilter filter = new CollisionFilter
14.         {
15.             BelongsTo = ~0u,
16.             CollidesWith = ~0u,
17.             GroupIndex = 0
18.         };
19.  
20.         NativeList<float3> verts = new NativeList<float3>(Allocator.Temp);
21.         verts.Add(new float3(-4, 0, -4));
22.         verts.Add(new float3(4, 0, -4));
23.         verts.Add(new float3(-4, 0, 4));
24.         verts.Add(new float3(4, 0, 4));
25.  
26.         NativeList<int3> tris = new NativeList<int3>(Allocator.Temp);
27.         tris.Add(new int3(0, 2, 1));
28.         tris.Add(new int3(2, 3, 1));
29.  
30.         var meshCollider = Unity.Physics.MeshCollider.Create(verts.AsArray(), tris.AsArray(), filter);
31.         var collider = new Unity.Physics.PhysicsCollider { Value = meshCollider };
32.         em.AddComponentData<PhysicsCollider>(e, collider);
33.  
34.         em.AddComponentData<LocalToWorld>(e, new LocalToWorld { Value = new float4x4(1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1) });
35.         em.AddComponentData<Translation>(e, new Translation {});
36.         em.AddComponentData<Rotation>(e, new Rotation {});
37.  
38.     }
39.  
40. }

 

Found the problem.
I wasn't correctly initialising Transform and Rotation components with Values.
All good now.