scenekit

I am trying to learn my way around SceneKit and as an example, I thought I'd try to build a solar system using the SDK. I am able to add SCNode objects and configure its material properties like pattern and lighting. Also, I am able to rotate the planets, but I can't seem to understand how do I "revolve" them along a particular path. My code so far looks like: // create a new scene SCNScene *scene = [SCNScene scene]; // create and add a camera to the scene SCNNode *cameraNode = [SCNNode node]; cameraNode.camera = [SCNCamera camera]; [scene.rootNode addChildNode:cameraNode]; // place the camera

I'm given three points and need to draw a smooth 3D parabola. The trouble is that curved line is choppy and has some weird divots in it Here is my code... func drawJump(jump: Jump){ let halfDistance = jump.distance.floatValue/2 as Float let tup = CalcParabolaValues(0.0, y1: 0.0, x2: halfDistance, y2: jump.height.floatValue, x3: jump.distance.floatValue, y3: 0) println("tuple \tup") var currentX = 0 as Float var increment = jump.distance.floatValue / Float(50) while currentX < jump.distance.floatValue - increment { let x1 = Float(currentX) let x2 = Float((currentX+increment)) let y1 =

This is the function that I use to display object on the plane surface. private func loadScene(path: String) -> SCNNode { let spotLight = SCNLight() spotLight.type = SCNLight.LightType.probe spotLight.spotInnerAngle = 30.0 spotLight.spotOuterAngle = 80.0 spotLight.castsShadow = true let result = SCNNode() result.light = spotLight result.position = SCNVector3(-10.0, 20.0, 10.5) result.addChildNode(result) let scene = SCNScene(named: path)! for node in scene.rootNode.childNodes { result.addChildNode(node) } return result } I want to display shadow on the plane surface like this image. When I set

I recently asked a question which had a pretty obvious answer. I'm still working on the same project and running into another problem. I need to implement per frame logic and the SCNSceneRendererDelegate protocol worked perfectly fine on iOS, but on OSX, the renderer function is not firing. I have created a little example project to illustrate my problem. It consists of a Scene Kit View in storyboard and following code in the ViewController class: import Cocoa import SceneKit class ViewController: NSViewController, SCNSceneRendererDelegate { @IBOutlet weak var sceneView: SCNView! let cubeNode

The goal is to recreate the lighting for this OBJ file: https://poly.google.com/view/cKryD9VnDEZ Code to load OBJ file into SceneKit (can download file from above link): let modelPath = "model.obj" let url = NSURL(string: modelPath) let scene = SCNScene(named: modelPath)! sceneView.autoenablesDefaultLighting = true sceneView.allowsCameraControl = true sceneView.scene = scene sceneView.backgroundColor = UIColor.white Options tried so far: 1) The default ambient lighting is much harsher than the Google Poly lighting. Removing the ambient lighting rendered everything too flat. 2) Using four