问SceneKit:使块更逼真或类似于3D

EN

func createScene() {
    // Set scene view
    let scene = SCNScene()
    sceneView.jitteringEnabled = true
    sceneView.scene = scene

    // Add camera node
    sceneView.pointOfView = cameraNode

    // Make delegate to capture screenshots
    sceneView.delegate = self

    // Set ambient lighting
    let ambientLightNode = SCNNode()
    ambientLightNode.light = SCNLight()
    ambientLightNode.light!.type = SCNLightTypeAmbient
    ambientLightNode.light!.color = UIColor(white: 0.50, alpha: 1.0)
    //scene.rootNode.addChildNode(ambientLightNode)
    //sceneView.autoenablesDefaultLighting = true

    // Set floor
    setFloor()

    // Set sky
    setSky()

    // Set initial position for user node
    userNode.position = SCNVector3(x: 0, y: Float(CameraMinY), z: Float(CameraZoom))

    // Add user node
    scene.rootNode.addChildNode(userNode)

    // Add camera to user node
    // zNear fixes white triangle bug while zFar fixes white line bug
    cameraNode.camera = SCNCamera()
    cameraNode.camera!.zNear = Double(0.1)
    cameraNode.camera!.zFar = Double(Int.max)
    cameraNode.position = SCNVector3(x: 0, y: 0, z: 0) //EB: Add some offset to represent the head
    userNode.addChildNode(cameraNode)
}


private func setFloor() {
    // Create floor geometry
    let floorImage = UIImage(named: "FloorBG")!
    let floor = SCNFloor()
    floor.reflectionFalloffEnd = 0
    floor.reflectivity = 0
    floor.firstMaterial!.diffuse.contents = floorImage
    floor.firstMaterial!.diffuse.contentsTransform = SCNMatrix4MakeScale(Float(floorImage.size.width)/2, Float(floorImage.size.height)/2, 1)
    floor.firstMaterial!.locksAmbientWithDiffuse = true
    floor.firstMaterial!.diffuse.wrapS = .Repeat
    floor.firstMaterial!.diffuse.wrapT = .Repeat
    floor.firstMaterial!.diffuse.mipFilter = .Linear

    // Set node & physics
    // -- Must set y-position to 0.5 so blocks are flush with floor
    floorLayer = SCNNode(geometry: floor)
    floorLayer.position.y = -0.5
    let floorShape = SCNPhysicsShape(geometry: floor, options: nil)
    let floorBody = SCNPhysicsBody(type: .Static, shape: floorShape)
    floorLayer.physicsBody = floorBody
    floorLayer.physicsBody!.restitution = 1.0

    // Add to scene
    sceneView.scene!.rootNode.addChildNode(floorLayer)
}


private func setSky() {
    // Create sky geometry
    let sky = SCNFloor()
    sky.reflectionFalloffEnd = 0
    sky.reflectivity = 0
    sky.firstMaterial!.diffuse.contents = SkyColor
    sky.firstMaterial!.doubleSided = true
    sky.firstMaterial!.locksAmbientWithDiffuse = true
    sky.firstMaterial!.diffuse.wrapS = .Repeat
    sky.firstMaterial!.diffuse.wrapT = .Repeat
    sky.firstMaterial!.diffuse.mipFilter = .Linear
    sky.firstMaterial!.diffuse.contentsTransform = SCNMatrix4MakeScale(Float(2), Float(2), 1);

    // Set node & physics
    skyLayer = SCNNode(geometry: sky)
    let skyShape = SCNPhysicsShape(geometry: sky, options: nil)
    let skyBody = SCNPhysicsBody(type: .Static, shape: skyShape)
    skyLayer.physicsBody = skyBody
    skyLayer.physicsBody!.restitution = 1.0

    // Set position
    skyLayer.position = SCNVector3(0, SkyPosY, 0)

    // Set fog
    /*sceneView.scene?.fogEndDistance = 60
     sceneView.scene?.fogStartDistance = 50
     sceneView.scene?.fogDensityExponent = 1.0
     sceneView.scene?.fogColor = SkyColor */

    // Add to scene
    sceneView.scene!.rootNode.addChildNode(skyLayer)
}


func createBlock(position: SCNVector3, animated: Bool) {
  ...

  // Create box geometry
  let box = SCNBox(width: 1.0, height: 1.0, length: 1.0, chamferRadius: 0.0)
  box.firstMaterial!.diffuse.contents = curStyle.getContents() // "curStyle.getContents()" either returns UIColor or UIImage
  box.firstMaterial!.specular.contents = UIColor.whiteColor()

  // Add new block
  let newBlock = SCNNode(geometry: box)
  newBlock.position = position
  blockLayer.addChildNode(newBlock)
}