如何將實體移回其初始 position

Question

在對球施加線性脈沖和扭矩后，我試圖將球移回其初始 position。

從 Reality Composer 加載場景時，我將球的初始變換存儲在此處

Experience.loadTestSphereAsync { (result) in
            switch result {
            case .success(let anchor):
                anchor.generateCollisionShapes(recursive: true)
                self.testSphereAnchor = anchor
                self.ball?.physicsBody?.mode = .static
                self.arView.scene.anchors.append(self.testSphereAnchor)
                self.ballStartTransform = self.testSphereAnchor.ball?.transform
                self.targetStartTransform = self.testSphereAnchor.target?.transform
                self.addTapGestures()
            case .failure(let error):
                fatalError(error.localizedDescription)
            }
        }

要將球移回原來的 position，我正在這樣做

func didPressRestartButton() {
        ball?.clearForcesAndTorques()
        ball?.physicsBody?.mode = .static
        ball?.move(to: ballStartTransform!, relativeTo: nil, duration: 0.3)
    }

球沒有回到原來的 position，而是在原處凍結。

Answer 1

將physicsBody模式改為.kinematic

https://developer.apple.com/documentation/realitykit/physicsbodymode/kinematic