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我试图在scn节点内的不同材质之间进行碰撞检测。我有一个有6种不同材料/颜色的立方体，并且球体来自立方体。我想要检测相同和不同颜色的碰撞，但不知道如何对每种材质应用不同的类别。如何在scn节点内的不同材质上碰撞检测
import UIKit
import SceneKit
class GameViewController: UIViewController, SCNPhysicsContactDelegate {
我可以创建类别以便稍后分配给多维数据集的不同侧面吗？
let ballCategory = 0
let cubeCategory = 1
let ballGreen = 2
let ballRed = 3
let ballBlue = 4
let ballYellow = 5
let ballPurple = 6
let ballOrange = 7
let cubeGreen = 8
let cubeRed = 9
let cubeBlue = 10
let cubeYellow = 11
let cubePurple = 12
let cubeOrange = 13
设置的东西
var scnView: SCNView!
var scnScene = SCNScene()
var cameraNode: SCNNode!
var cubeNode = SCNNode()
var ball = SCNNode()
var randomColor: UIColor?
var timer = Timer()
override func viewDidLoad() {
super.viewDidLoad()
scnScene.physicsWorld.contactDelegate = self
scnView = self.view as? SCNView
view.scene = scnScene
view.isPlaying = true
}
setupView()
setupScene()
setupCamera()
spawnCube()
}
威尔物理世界确实开始接触工作？
func physicsWorld(world: SCNPhysicsWorld, didBegin contact: SCNPhysicsContact) {
print("Physics called")
if (contact.nodeA == cubeNode || contact.nodeA == ball) && (contact.nodeB == cubeNode || contact.nodeB == ball) {
print("contact")
}
if (contact.nodeA.physicsBody!.categoryBitMask == 2 && contact.nodeB.physicsBody!.categoryBitMask == 8) || (contact.nodeB.physicsBody!.categoryBitMask == 2 && contact.nodeA.physicsBody!.categoryBitMask == 8) {
print("green contact")
}
if (contact.nodeA.physicsBody!.categoryBitMask == 3 && contact.nodeB.physicsBody!.categoryBitMask == 9) || (contact.nodeB.physicsBody!.categoryBitMask == 3 && contact.nodeA.physicsBody!.categoryBitMask == 9) {
print("green contact")
}
if (contact.nodeA.physicsBody!.categoryBitMask == 4 && contact.nodeB.physicsBody!.categoryBitMask == 10) || (contact.nodeB.physicsBody!.categoryBitMask == 4 && contact.nodeA.physicsBody!.categoryBitMask == 10) {
print("green contact")
}
if (contact.nodeA.physicsBody!.categoryBitMask == 5 && contact.nodeB.physicsBody!.categoryBitMask == 11) || (contact.nodeB.physicsBody!.categoryBitMask == 5 && contact.nodeA.physicsBody!.categoryBitMask == 11) {
print("green contact")
}
if (contact.nodeA.physicsBody!.categoryBitMask == 6 && contact.nodeB.physicsBody!.categoryBitMask == 12) || (contact.nodeB.physicsBody!.categoryBitMask == 6 && contact.nodeA.physicsBody!.categoryBitMask == 12) {
print("green contact")
}
if (contact.nodeA.physicsBody!.categoryBitMask == 7 && contact.nodeB.physicsBody!.categoryBitMask == 13) || (contact.nodeB.physicsBody!.categoryBitMask == 7 && contact.nodeA.physicsBody!.categoryBitMask == 13) {
print("green contact")
}
}
func setupView() {
scnView = self.view as! SCNView
scnView.showsStatistics = false
scnView.allowsCameraControl = false
scnView.autoenablesDefaultLighting = true
}
func setupScene() {
scnScene = SCNScene()
scnView.scene = scnScene
scnScene.background.contents = UIColor.black
}
func setupCamera() {
cameraNode = SCNNode()
cameraNode.camera = SCNCamera()
cameraNode.position = SCNVector3(x: 0, y: 0, z: 10)
scnScene.rootNode.addChildNode(cameraNode)
}
立方设置，我得到一个错误，当我尝试将类别添加到不同的侧面/材料
func spawnCube() {
var geometry:SCNGeometry
geometry = SCNBox(width: 1, height: 1, length: 1, chamferRadius: 0.05)
cubeNode = SCNNode(geometry: geometry)
let greenMaterial = SCNMaterial()
greenMaterial.diffuse.contents = UIColor.green
greenMaterial.locksAmbientWithDiffuse = true
let redMaterial = SCNMaterial()
redMaterial.diffuse.contents = UIColor.red
redMaterial.locksAmbientWithDiffuse = true
let blueMaterial = SCNMaterial()
blueMaterial.diffuse.contents = UIColor.blue
blueMaterial.locksAmbientWithDiffuse = true
let yellowMaterial = SCNMaterial()
yellowMaterial.diffuse.contents = UIColor.yellow
yellowMaterial.locksAmbientWithDiffuse = true
let purpleMaterial = SCNMaterial()
purpleMaterial.diffuse.contents = UIColor.purple
purpleMaterial.locksAmbientWithDiffuse = true
let orangeMaterial = SCNMaterial()
orangeMaterial.diffuse.contents = UIColor.orange
orangeMaterial.locksAmbientWithDiffuse = true
geometry.materials = [greenMaterial, redMaterial, blueMaterial,
yellowMaterial, purpleMaterial, orangeMaterial]
cubeNode.physicsBody?.mass = 10000
cubeNode.physicsBody?.restitution = 0
cubeNode.physicsBody?.damping = 0
cubeNode.physicsBody = SCNPhysicsBody.kinematic()
cubeNode.physicsBody?.categoryBitMask = Int(cubeCategory)
cubeNode.physicsBody?.contactTestBitMask = Int(ballCategory)
cubeNode.physicsBody?.isAffectedByGravity = false
cubeNode.position = SCNVector3(x: 0, y: 0, z: 0)
scnScene.rootNode.addChildNode(cubeNode)
}
球的设置，我也得到一个错误，当我尝试添加不同的类别，以不同颜色的球
func spawnBall() {
var geometry:SCNGeometry
geometry = SCNSphere(radius: 0.25)
let ball = SCNNode(geometry: geometry)
let randomNumberForColor = Int(arc4random_uniform(6))
if randomNumberForColor == 1 {
randomColor = UIColor.green
}
if randomNumberForColor == 2 {
randomColor = UIColor.red
}
if randomNumberForColor == 3 {
randomColor = UIColor.blue
}
if randomNumberForColor == 4 {
randomColor = UIColor.yellow
}
if randomNumberForColor == 5 {
randomColor = UIColor.purple
}
if randomNumberForColor == 6 {
randomColor = UIColor.orange
}
if randomNumberForColor == nil {
randomColor = UIColor.green
}
let greenMaterial = SCNMaterial()
greenMaterial.diffuse.contents = randomColor
greenMaterial.locksAmbientWithDiffuse = true;
geometry.materials = [greenMaterial]
ball.physicsBody?.mass = 0.00001
ball.physicsBody?.restitution = 1
ball.physicsBody?.damping = 0
ball.physicsBody = SCNPhysicsBody.dynamic()
ball.physicsBody?.categoryBitMask = Int(ballCategory)
ball.physicsBody?.contactTestBitMask = Int(cubeCategory)
ball.physicsBody?.isAffectedByGravity = false
randomX()
randomY()
randomZ()
ball.position = SCNVector3(x: Float(randomNumX!), y: Float(randomNumY!), z: Float(randomNumZ!))
scnScene.rootNode.addChildNode(ball)
let force = SCNVector3(x: Float(-randomNumX!)/2, y: Float(-randomNumY!)/2, z: Float(-randomNumZ!)/2)
ball.physicsBody?.applyForce(force, at: cubeNode.position, asImpulse: true)
}
func randomX() {
randomNumX = Int(arc4random_uniform(10)) - 5
}
func randomY() {
randomNumY = Int(arc4random_uniform(20)) - 10
}
func randomZ() {
randomNumZ = Int(arc4random_uniform(10)) - 5
}
}
也许有简化这个办法只用匹配颜色的限定符来检测球和立方体的碰撞？
谢谢！
当你发现一个接触，为什么不把球的颜色和脸的颜色进行比较？这是你的事后？ –
是的，你有推荐的实现吗？ – spapp