127 lines
4.7 KiB
Swift
127 lines
4.7 KiB
Swift
//
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// GameViewController.swift
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// Waveform
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//
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// Created by Eryn Wells on 9/16/18.
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// Copyright © 2018 Eryn Wells. All rights reserved.
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//
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import SceneKit
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import QuartzCore
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class GameViewController: NSViewController, SCNSceneRendererDelegate {
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static let numberOfBallsPerSide = 41
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private var balls = [SCNNode]()
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override func viewDidLoad() {
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super.viewDidLoad()
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guard let sceneView = view as? SCNView else {
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fatalError("My view isn't a SCNView!")
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}
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sceneView.delegate = self
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sceneView.rendersContinuously = true
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sceneView.preferredFramesPerSecond = 30
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// create a new scene
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let scene = SCNScene(named: "art.scnassets/blank.scn")!
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// create and add a camera to the scene
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let cameraNode = SCNNode()
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let camera = SCNCamera()
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cameraNode.camera = camera
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scene.rootNode.addChildNode(cameraNode)
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// place the camera
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cameraNode.position = SCNVector3(x: CGFloat(GameViewController.numberOfBallsPerSide / 7),
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y: 1.5,
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z: CGFloat(GameViewController.numberOfBallsPerSide / 3))
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cameraNode.look(at: SCNVector3())
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// create and add a light to the scene
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let lightNode = SCNNode()
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lightNode.light = SCNLight()
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lightNode.light!.type = .omni
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lightNode.position = SCNVector3(x: 0, y: 10, z: 10)
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scene.rootNode.addChildNode(lightNode)
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// create and add an ambient light to the scene
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let ambientLightNode = SCNNode()
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ambientLightNode.light = SCNLight()
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ambientLightNode.light!.type = .ambient
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ambientLightNode.light!.color = NSColor.darkGray
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scene.rootNode.addChildNode(ambientLightNode)
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let sphereContainer = SCNNode()
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scene.rootNode.addChildNode(sphereContainer)
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if let sphere = scene.rootNode.childNode(withName: "sphere", recursively: false) {
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// Remove it. We're going to copy it all over the place.
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sphere.removeFromParentNode()
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for i in 0..<GameViewController.numberOfBallsPerSide {
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for j in 0..<GameViewController.numberOfBallsPerSide {
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let ijSphere = sphere.clone()
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balls.append(ijSphere)
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ijSphere.name = "sphere\(i),\(j)"
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ijSphere.worldPosition = SCNVector3(x: CGFloat(-GameViewController.numberOfBallsPerSide / 2) + CGFloat(i),
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y: 0.0,
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z: CGFloat(-GameViewController.numberOfBallsPerSide / 2) + CGFloat(j))
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let ijMaterial = ijSphere.geometry!.firstMaterial!.copy() as! SCNMaterial
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ijSphere.geometry!.replaceMaterial(at: 0, with: ijMaterial)
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sphereContainer.addChildNode(ijSphere)
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}
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}
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}
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sphereContainer.runAction(SCNAction.repeatForever(SCNAction.rotate(by: CGFloat.pi, around: SCNVector3(0, 1, 0), duration: 40.0)))
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// set the scene to the view
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sceneView.scene = scene
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// allows the user to manipulate the camera
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sceneView.allowsCameraControl = false
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// show statistics such as fps and timing information
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sceneView.showsStatistics = true
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// configure the view
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sceneView.backgroundColor = NSColor.black
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}
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func delayForSphereAt(x: Int, y: Int) -> Double {
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return 0.05 * Double(x) + 0.03 * Double(y)
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}
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// MARK: - SCNRendererDelegate
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var maxY = 0.0
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var minY = 0.0
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func renderer(_ renderer: SCNSceneRenderer, updateAtTime time: TimeInterval) {
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for z in 0..<GameViewController.numberOfBallsPerSide {
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for x in 0..<GameViewController.numberOfBallsPerSide {
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let idx = z * GameViewController.numberOfBallsPerSide + x
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let node = balls[idx]
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let delay = delayForSphereAt(x: x, y: z)
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let inputX = 0.5 * time + delay
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let y = (sin(inputX) + sin(2.0 * inputX) + sin(4.0 * inputX) + sin(8.0 * inputX)) / 2.0
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node.worldPosition.y = CGFloat(y)
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maxY = max(y, maxY)
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minY = min(y, minY)
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let scale = CGFloat(map(y, inMin: minY, inMax: maxY, outMin: 0.0, outMax: 1.0))
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node.scale = SCNVector3(x: scale, y: scale, z: scale)
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}
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}
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}
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func map(_ x: Double, inMin: Double, inMax: Double, outMin: Double, outMax: Double) -> Double {
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return (x - inMin) * (outMax - outMin) / (inMax - inMin) + outMin
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}
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}
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