SceneKit Training for OSX by Swift (2): Default Objects

基本的なオブジェクトを表示してみる

Box

func createCube() -> SCNNode {
    let cube = SCNBox(width: 1, height: 1, length: 1, chamferRadius: 0)
    let cubeNode = SCNNode(geometry: cube)
    let rotateDegree : CGFloat = CGFloat(M_PI_4) / 2
    cubeNode.transform = SCNMatrix4MakeRotation(1.0, rotateDegree, rotateDegree, 0)
    return cubeNode
}

Capsule

func createCapsule() -> SCNNode {
    let capsule = SCNCapsule(capRadius: 1, height: 4)
    let capsuleNode = SCNNode(geometry: capsule)
    return capsuleNode
}

capsuleは height >= capRadius * 2 出ないとうまく表示できないので注意.

Cone

func createCone() -> SCNNode {
    let cone = SCNCone(topRadius: 1, bottomRadius: 2, height: 2)
    let coneNode = SCNNode(geometry: cone)
    let rotateDegree : CGFloat = CGFloat(M_PI_4) / 2
    coneNode.transform = SCNMatrix4MakeRotation(1.0, rotateDegree, rotateDegree, 0)
    return coneNode
}

topRadius = bottomRadiusならば円柱形、topRadius = 0 ならば円錐形になる.

Cylinder

func createCylinder() -> SCNNode {
    let cylinder = SCNCylinder(radius: 1.0, height: 2.0)
    let cylinderNode = SCNNode(geometry: cylinder)
    let rotateDegree : CGFloat = CGFloat(M_PI_4) / 2
    cylinderNode.transform = SCNMatrix4MakeRotation(1.0, rotateDegree, rotateDegree, 0)
    return cylinderNode
}

円柱。SCNConeでも表現できる。

Floor

無限に広がる床.

floorはそのままだと遠近感がつかめないので、傾けて対象にcubeを表示。

func createFloor() -> SCNNode {
    let floor = SCNFloor()
    let floorNode = SCNNode(geometry: floor)
    let rotateDegree : CGFloat = CGFloat(M_PI_4)
    floorNode.transform = SCNMatrix4MakeRotation(rotateDegree, 0.1, 1, 0)
    return floorNode
}

Plane

有限の板.

planeはxy平面に表示され、floorがzy平面に表示されるのと異なる。

func createPlane() -> SCNNode {
    let plane = SCNPlane(width: 1.5, height: 1.5)
    plane.firstMaterial!.doubleSided = true
    plane.firstMaterial!.diffuse.contents = NSColor.darkGrayColor()
    let planeNode = SCNNode(geometry: plane)
    return planeNode
}

firstMaterial.diffuse.contentsに色を設定できる。

pyramid

四角錐.

func createPyramid() -> SCNNode {
    let pyramid = SCNPyramid(width: 1.5, height: 1.5, length: 1.5)
    pyramid.firstMaterial!.doubleSided = true
    pyramid.firstMaterial!.diffuse.contents = NSColor.darkGrayColor()
    let pyramidNode = SCNNode(geometry: pyramid)
    let rotateDegree : CGFloat = CGFloat(M_PI_4)
    pyramidNode.transform = SCNMatrix4MakeRotation(rotateDegree, 1, 0, 0)
    return pyramidNode
}

pyramidもfirstMaterial.diffuse.contentsで色を指定しないと表示されない.

Shape

shapeは任意の2次元の形。

func createShape() -> SCNNode {
    let path = NSBezierPath()
    let step : CGFloat = CGFloat(M_PI * 2 / 5)
    let scale : CGFloat = CGFloat(0.4)

    path.moveToPoint(NSMakePoint(cos(0), sin(0)))
    path.lineToPoint(NSMakePoint(scale * cos(step * 0.5), scale * sin(step * 0.5)))
    let i : CGFloat = 0
    for i in 1...4 {
        let pos : CGFloat = CGFloat(step * CGFloat(i))
        let pos_inner : CGFloat = CGFloat(step * CGFloat(CGFloat(i) + 0.5))
        path.lineToPoint(NSMakePoint(cos(pos), sin(pos)))
        path.lineToPoint(NSMakePoint(scale * cos(pos_inner), scale * sin(pos_offset)))
    }
    path.closePath()

    let shape = SCNShape(path: path, extrusionDepth: 1.0)
    shape.firstMaterial!.diffuse.contents = NSColor.darkGrayColor()

    let shapeNode = SCNNode(geometry: shape)
    return shapeNode
}

shapeもmaterial.diffuse.contentsで色をつけないと表示されない。

Sphere

球。

func createSphere() -> SCNNode {
    let sphere = SCNSphere(radius: 1)
    let sphereNode = SCNNode(geometry: sphere)
    return sphereNode
}

Torus

トーラス、円環面、ドーナッツ型。

func createTorus() -> SCNNode {
    let torus = SCNTorus(ringRadius: 1.0, pipeRadius: 0.4)
    let torusNode = SCNNode(geometry: torus)
    torusNode.transform = SCNMatrix4MakeRotation(CGFloat(M_PI_4), 1, 0, 0)
    return torusNode
}

Tube

チューブ

簡単にトイレットペーパーオブジェクトが作れる

func createTube() -> SCNNode {
    let tube = SCNTube(innerRadius: 0.5, outerRadius: 1.0, height: 2)
    let tubeNode = SCNNode(geometry: tube)
    tubeNode.transform = SCNMatrix4MakeRotation(CGFloat(M_PI_4 * 2 / 3), 1, 0, 0)
    return tubeNode
}

Text

文字.

func createText() -> SCNNode {
    let text = SCNText(string: "Hello Text", extrusionDepth: 2)
    text.font = NSFont(name: "Arial", size: 1.0)
    text.chamferRadius = 0.3
    text.flatness = 0.1
    text.firstMaterial!.diffuse.contents = NSColor.darkGrayColor()
    text.alignmentMode = kCAAlignmentCenter
    text.containerFrame = CGRectMake(-2.4, 0.0, 5, 1)
    let textNode = SCNNode(geometry: text)
    let rotateDegree : CGFloat = CGFloat(M_PI_4)
    return textNode
}

alignmentModeで指定したアラインメントを実現するためには、containerFrameの大きさの設定が必要な点に注意。