Don't update scene objects of sleeping bodies.

hmans · Sep 26, 2022 · fac8ca5 · fac8ca5
1 parent ccae725
commit fac8ca5
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Showing 3 changed files with 10 additions and 1 deletion.
diff --git a/.changeset/six-cows-buy.md b/.changeset/six-cows-buy.md
@@ -0,0 +1,5 @@
+---
+"@hmans/physics3d": patch
+---
+
+Don't update scene objects of sleeping bodies.
diff --git a/packages/hmans-physics3d/src/RigidBody.tsx b/packages/hmans-physics3d/src/RigidBody.tsx
@@ -57,6 +57,7 @@ export const RigidBody = forwardRef<RigidBodyEntity, RigidBodyProps>(
       /* TODO: set these relative to the physics world object! */
 
       /* Make sure the scene object's world matrix is up to date */
+      sceneObject.current.updateMatrix()
       sceneObject.current.updateMatrixWorld()
 
       /* Assign to state */
@@ -90,7 +91,7 @@ export const RigidBody = forwardRef<RigidBodyEntity, RigidBodyProps>(
     useImperativeHandle(ref, () => state)
 
     return (
-      <group ref={sceneObject} {...groupProps}>
+      <group ref={sceneObject} {...groupProps} matrixAutoUpdate={false}>
         <RigidBodyContext.Provider value={state}>
           {children}
         </RigidBodyContext.Provider>

diff --git a/packages/hmans-physics3d/src/World.tsx b/packages/hmans-physics3d/src/World.tsx
@@ -53,6 +53,8 @@ export const World = ({
 
       const { body, sceneObject } = entity
 
+      if (body.isSleeping()) continue
+
       /* Get transform from rigidbody */
       const position = new THREE.Vector3().copy(
         body.translation() as THREE.Vector3
@@ -65,6 +67,7 @@ export const World = ({
       /* Apply transform to scene object */
       sceneObject.position.copy(position)
       sceneObject.quaternion.copy(quaternion)
+      sceneObject.updateMatrix()
     }
 
     /* Handle collision events */