Since the 3 entities are children of Body, applying anything to the parent should (will?) effect the entire thing. Will be easy enough to test, right?

Thanks Henry, for such a thorough answer. You illustrate the problem. The last line where you call applyImpulse on physicsBody results in "Value of type 'PhysicsBodyComponent' has no member 'applyImpulse'". That's the challenge I am trying to resolve. Upon what object is applyImpulse supposed to be called on if not physicsBody as you (and I) have defined: guard let physicsBody = tappedObject.entity.components[PhysicsBodyComponent.self] as? PhysicsBodyComponent else { fatalError("PhysicsBodyComponent not found on the entity") } To further clarify, this is a gesture handler that shows the issue: func Throw(objToThrow: EntityTargetValue<TapGesture.Value>) { let entT = objToThrow.entity let comp = entT.components let pbc = comp[PhysicsBodyComponent.self]! let physicsBodComp = pbc as PhysicsBodyComponent // Type casting is unnecessary as pbc is already a PhysicsBodyComponent let impulse = SIMD3<Float>(x: 0.0, y: 10.0, z: 0.0) let position = SIMD3<Float>(x: 0.0, y: 0.0, z: 0.0) let referenceEntity: Entity? = nil physicsBodComp.applyImpulse(impulse, at: position, relativeTo: referenceEntity); // <<< error here } Thanks!

I don't see it either. I suspect they took it out due to issues. I too would like to detect collisions with particles. Might be a question for DTS. Cheers...

Same issue here. Would love to see how P.E.'s work. Any ETA on repairs?