Distance queries using a MeshCollider - NotImplementedError

Unity Engine
, ,
1

I have a simple conical mesh collider, and I’m trying to run a distance query using the code below.

var collider = Unity.Physics.MeshCollider.Create(vertices, triangles);
var physicsWorldSystem = Unity.Entities.World.DefaultGameObjectInjectionWorld.GetExistingSystem<Unity.Physics.Systems.BuildPhysicsWorld>();
var collisionWorld = physicsWorldSystem.PhysicsWorld.CollisionWorld;
var input = new ColliderDistanceInput
{
    Collider = (Unity.Physics.Collider*)collider.GetUnsafePtr(),
    MaxDistance = 0,
};
DistanceHit hit;
if (collisionWorld.CalculateDistance(input, out hit))
{
    Debug.Log("Hit something: " + hit.Entity);
}

Doing that throws a NotImplementedError, because the input->Collider->CollisionType is Composite, and UnityPhysics.ColliderCollider appears to only supports convex collisions.

The collider mesh is actually convex, but I don’t know how to convince UnityPhysics of this fact. Is there a way to make it interpret a MeshCollider as convex?

2

Nevermind, I am stupid.

If anyone finds this in the future, this is how you generate a convex colllider:

Unity.Physics.ConvexCollider.Create(vertices, ConvexHullGenerationParameters.Default);

Simple enough.

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