swift - RealityKit – 动画循环变换

Question

我不知道如何让下面的移动函数重复，以便在简单的 meshResource 上创建一个恒定的旋转。有什么建议吗？

var transform = sphereEntity.transform
transform.rotation =  simd_quatf(angle: .pi, axis: [0,1,0])
let anim = sphereEntity.move(to: transform, relativeTo: sphereEntity.parent, duration: 5.0)

Answer 1

.move() 实例方法在添加到场景的线实体之后开始工作。

let boxEntity = ModelEntity(mesh: .generateBox(size: 1.0), 
                       materials: [SimpleMaterial()])

var transform = boxEntity.transform

transform.rotation =  simd_quatf(angle: .pi, axis: [0, 1, 0])
    
let boxAnchor = AnchorEntity()
boxAnchor.children.append(boxEntity)
arView.scene.anchors.append(boxAnchor)
    
boxEntity.move(to: transform, relativeTo: nil, duration: 5.0)

At the moment (December 23, 2022) all RealityKit's .move() methods still can't loop.