147 lines
4.4 KiB
Swift
147 lines
4.4 KiB
Swift
//
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// BackgroundViewController.swift
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// XIONControlPanel
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//
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// Created by Charles Magahern on 12/29/15.
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// Copyright © 2015 XION. All rights reserved.
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//
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import Darwin
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import Foundation
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import GLKit
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import SceneKit
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import UIKit
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let π = Float(M_PI)
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class BackgroundViewController: UIViewController {
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private var _scene: SCNScene = SCNScene()
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private var _sceneView: SCNView?
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private var _cameraNode: SCNNode = SCNNode()
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private var _cubletsNode: SCNNode = SCNNode()
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static private let cubletsDimensions = 5
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static private let cubletsSize = 1.0
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static private let cubletsSpacing = 2.0
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override func loadView()
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{
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let opts = [SCNPreferredRenderingAPIKey : SCNRenderingAPI.OpenGLES2.rawValue]
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let view = SCNView(frame: UIScreen.mainScreen().bounds, options: opts)
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view.backgroundColor = UIColor.blackColor()
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view.scene = _scene
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view.allowsCameraControl = false
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_sceneView = view
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self.view = view
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}
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override func viewDidLoad()
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{
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super.viewDidLoad()
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_setupCamera()
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_setupLights()
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_setupModel()
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_setupAnimation()
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_setupEffects()
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}
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override func viewDidAppear(animated: Bool)
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{
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super.viewDidAppear(animated)
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_sceneView?.play(nil)
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}
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override func viewDidDisappear(animated: Bool)
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{
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super.viewDidDisappear(animated)
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_sceneView?.stop(nil)
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}
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// MARK: Internal
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internal func _setupCamera()
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{
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let camera = SCNCamera()
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_cameraNode.camera = camera
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_cameraNode.position = SCNVector3Make(0.0, 0.0, 50.0)
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_scene.rootNode.addChildNode(_cameraNode)
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let centerNode = SCNNode()
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centerNode.position = SCNVector3Zero
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_scene.rootNode.addChildNode(centerNode)
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let constraint = SCNLookAtConstraint(target: centerNode)
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_cameraNode.constraints = [constraint]
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}
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internal func _setupLights()
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{
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let light = SCNLight()
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light.type = SCNLightTypeOmni
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light.color = UIColor.whiteColor()
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let lightNode = SCNNode()
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lightNode.light = light
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lightNode.position = _cameraNode.position
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_scene.rootNode.addChildNode(lightNode)
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}
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internal func _setupModel()
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{
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let sz = Float(BackgroundViewController.cubletsSize)
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let dim = BackgroundViewController.cubletsDimensions
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let dimf = Float(dim)
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let spacing = Float(BackgroundViewController.cubletsSpacing)
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let volume = (dimf * sz) + ((dimf - 1.0) * spacing)
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let orig = -volume / 2.0
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// setup material
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let material = SCNMaterial()
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material.diffuse.contents = UIColor.whiteColor()
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material.transparency = 0.75
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// setup geometry
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let geom = SCNBox(width: CGFloat(sz), height: CGFloat(sz), length: CGFloat(sz), chamferRadius: 0.0)
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geom.firstMaterial = material
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for var xi = 0; xi < dim; ++xi {
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let x = orig + Float(xi) * (sz + spacing)
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for var yi = 0; yi < dim; ++yi {
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let y = orig + Float(yi) * (sz + spacing)
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for var zi = 0; zi < dim; ++zi {
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let z = orig + Float(zi) * (sz + spacing)
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let node = SCNNode(geometry: geom)
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node.position = SCNVector3Make(x, y, z)
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_cubletsNode.addChildNode(node)
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}
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}
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}
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_cubletsNode.position = SCNVector3Zero
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_scene.rootNode.addChildNode(_cubletsNode)
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}
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internal func _setupAnimation()
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{
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let rotAxis = SCNVector3Make(0.25, 1.75, 1.0)
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let rotAngle = CGFloat(Float(2.0)*π)
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let rotAction = SCNAction.repeatActionForever(SCNAction.rotateByAngle(rotAngle, aroundAxis: rotAxis, duration: 40.0))
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_cubletsNode.runAction(rotAction)
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}
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internal func _setupEffects()
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{
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let techniqueURL = NSBundle.mainBundle().URLForResource("CubletsTechnique", withExtension: "plist")
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let techniqueDict = NSDictionary(contentsOfURL: techniqueURL!) as! [String : AnyObject]
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let technique = SCNTechnique(dictionary: techniqueDict)
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_sceneView?.technique = technique
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}
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}
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