Question

嘿，我已经在xcode中导入了我的角色动画，我想在scenekit中用触摸移动它，让我们假设从A点到另一个点B.但它没有移动我有以下代码。不知道为什么它不起作用请帮助....谢谢

//character imported from blender
var scene = SCNScene(named: "art.scnassets/hero.dae")!
// touches for movement 
override func touchesBegan(touches: Set<UITouch>, withEvent event: UIEvent?) {
    var taps = event!.allTouches()
    touchCount = taps?.count
}

override func touchesEnded(touches: Set<UITouch>, withEvent event: UIEvent?) {
    touchCount = 0


}

func positionCameraWithHero() {
    let hero = heroNode.presentationNode
    var heroPosition = hero.position
    let cameraDamping:Float = 0.3
    var targetPosition = SCNVector3Make(heroPosition.x, 30.0, heroPosition.z + 20.0)
    var cameraPosition = camera.position
    var cameraXPos = cameraPosition.x * (1.0 - cameraDamping) + targetPosition.x *
cameraDamping
    var cameraYPos = cameraPosition.y * (1.0 - cameraDamping) + targetPosition.y *
cameraDamping
    var cameraZPos = cameraPosition.z * (1.0 - cameraDamping) + targetPosition.z *
cameraDamping
    cameraPosition = SCNVector3(x: cameraXPos, y: cameraYPos, z: cameraZPos)
    camera.position = cameraPosition
    light.position = SCNVector3(x: heroPosition.x, y: 90, z: heroPosition.z +
    40.0)
    light.rotation = SCNVector4(x: 1, y: 0, z: 0, w: Float(-M_PI/2.8))

}

func renderer(aRenderer: SCNSceneRenderer, didSimulatePhysicsAtTime time: NSTimeInterval) {
    let moveDistance = Float(10.0)
    let moveSpeed = NSTimeInterval(1.0)
    let currentX = heroNode.position.x
    let currentY = heroNode.position.y
    let currentZ = heroNode.position.z

    if touchCount == 1{
        let action = SCNAction.moveTo(SCNVector3Make(currentX, currentY, currentZ -
        moveDistance), duration: moveSpeed);
        heroNode.runAction(action)
    }
    else if touchCount == 2 {
        let action = SCNAction.moveTo(SCNVector3Make(currentX, currentY, currentZ +
        moveDistance), duration: moveSpeed)
        heroNode.runAction(action)
    }

Answer 1

每次渲染帧时，您的代码都会尝试创建并运行新的SCNAction。这可能不是你想要的。

相反，在接收到触摸时创建一个SCNAction，持续时间为10秒。跑吧。该代码属于touchesBegan()（或者touchesEnded()）。

您可以使用SCNAction.moveBy(_:duration:)或SCNAction.moveByX(_:y:z:duration:)代替moveTo()来缩短代码。你所谓的moveSpeed实际上是一个时间间隔，而不是速度，这个术语可能会让未来的维护者感到困惑。

我没有看到positionCameraWithHero()被调用过。它应该从renderer(didSimulatePhysicsAtTime:)。

调用

注意：在您当前的实现中，永远不会调用renderer(didSimulatePhysicsAtTime{)。那是因为你没有动画运行（见SKScene becomes unresponsive while being idle）。还要注意OS X上忽略playing属性中的明显错误（请参阅SceneKit SCNSceneRendererDelegate - renderer function not called）。但是，一旦您更正了SCNAction的创建，您将不会遇到此问题。

角色没有在scenekit中移动

1 个答案: