Created
October 27, 2019 14:37
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| // A SceneKit based Playground to test camera movement and direction | |
| // using the built in CameraControls | |
| import SceneKit | |
| import PlaygroundSupport | |
| // setup view | |
| var sceneView = SCNView(frame: CGRect(x:0 , y:0, width: 480, height: 640)) | |
| var scene = SCNScene() | |
| sceneView.scene = scene | |
| sceneView.backgroundColor = UIColor.white | |
| sceneView.autoenablesDefaultLighting = true | |
| sceneView.allowsCameraControl = true | |
| sceneView.showsStatistics = true | |
| // present | |
| PlaygroundPage.current.liveView = sceneView | |
| // add camera to the scene | |
| let camera = SCNCamera() | |
| camera.automaticallyAdjustsZRange = true | |
| // camera.usesOrthographicProjection = true | |
| // camera.orthographicScale = 2.5 | |
| let cameraNode = SCNNode() | |
| cameraNode.camera = camera | |
| cameraNode.name = "camera" | |
| cameraNode.position = SCNVector3(x: 10, y: 10, z: 10) | |
| cameraNode.look(at: SCNVector3Zero) | |
| scene.rootNode.addChildNode(cameraNode) | |
| // MARK: - Spheres | |
| func addSphere(x: Float, y: Float, z: Float, radius: Float, color: UIColor = UIColor.gray) { | |
| let material = SCNMaterial() | |
| material.diffuse.contents = color | |
| let sphereGeometry = SCNSphere(radius: CGFloat(radius)) | |
| sphereGeometry.firstMaterial = material | |
| let sphereNode = SCNNode(geometry: sphereGeometry) | |
| sphereNode.name = "dot" | |
| sphereNode.position = SCNVector3(x: x, y: y, z: z) | |
| scene.rootNode.addChildNode(sphereNode) | |
| } | |
| let spacing: Float = 2.0 | |
| let radius: Float = 1.0 | |
| addSphere( | |
| x: 0.0, | |
| y: 0.0, | |
| z: 0.0, | |
| radius: radius) | |
| addSphere( | |
| x: -2.0 * spacing, | |
| y: -2.0 * spacing, | |
| z: 0.0, | |
| radius: radius) | |
| addSphere( | |
| x: 2.0 * spacing, | |
| y: 2.0 * spacing, | |
| z: 0.0, | |
| radius: radius) | |
| addSphere( | |
| x: -2.0 * spacing, | |
| y: 2.0 * spacing, | |
| z: 0.0, | |
| radius: radius) | |
| addSphere( | |
| x: 2.0 * spacing, | |
| y: -2.0 * spacing, | |
| z: 0.0, | |
| radius: radius) | |
| addSphere( | |
| x: 0.0, | |
| y: -2.0 * spacing, | |
| z: -2.0 * spacing, | |
| radius: radius) | |
| addSphere( | |
| x: 0.0, | |
| y: 2.0 * spacing, | |
| z: 2.0 * spacing, | |
| radius: radius) | |
| addSphere( | |
| x: 0.0, | |
| y: 2.0 * spacing, | |
| z: -2.0 * spacing, | |
| radius: radius) | |
| addSphere( | |
| x: 0.0, | |
| y: -2.0 * spacing, | |
| z: 2.0 * spacing, | |
| radius: radius) | |
| // sphere which lets camera move off center | |
| addSphere( | |
| x: 6.0, | |
| y: 6.0, | |
| z: 6.0, | |
| radius: radius) | |
| // MARK: - Coordinate Symbol | |
| let coordinates = SCNNode() | |
| scene.rootNode.addChildNode(coordinates) | |
| let coordVertices: [SCNVector3] = [ | |
| SCNVector3(0, 0, 0), | |
| SCNVector3(5, 0, 0), | |
| SCNVector3(0, 0, 5), | |
| SCNVector3(-5, 0, 0), | |
| SCNVector3(0, 0, -5), | |
| SCNVector3(0, 5, 0) | |
| ] | |
| let coordColors: [String: UIColor] = [ | |
| "red": UIColor.red, | |
| "blue": UIColor.blue, | |
| "green": UIColor.green, | |
| ] | |
| var materials: [String : SCNMaterial] { | |
| var mat = [String : SCNMaterial]() | |
| for (key, value) in coordColors { | |
| let material = SCNMaterial() | |
| material.lightingModel = SCNMaterial.LightingModel.constant | |
| material.isDoubleSided = true | |
| material.diffuse.contents = value | |
| mat[key] = material | |
| } | |
| return mat | |
| } | |
| func buildLine(vertice1: SCNVector3, Vertice2: SCNVector3, material: SCNMaterial) -> SCNNode { | |
| let geometry = SCNGeometry( | |
| sources: [SCNGeometrySource(vertices: [vertice1, Vertice2])], | |
| elements: [SCNGeometryElement(indices: [Int32]([0,1]), primitiveType: .line)] | |
| ) | |
| geometry.firstMaterial = material | |
| return SCNNode(geometry: geometry) | |
| } | |
| coordinates.addChildNode(buildLine(vertice1: coordVertices[1], Vertice2: coordVertices[3], material: materials["red"]!)) | |
| coordinates.addChildNode(buildLine(vertice1: coordVertices[2], Vertice2: coordVertices[4], material: materials["blue"]!)) | |
| coordinates.addChildNode(buildLine(vertice1: coordVertices[0], Vertice2: coordVertices[5], material: materials["green"]!)) |
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