scenekit

I'd like to use a Metal shader to apply a toon/cell shading to materials used in the scene. The shader I'm trying to implement is Apple's own AAPLCelShader found in the MetalShaderShowcase . I'm a little new to implementing shaders in SceneKit so I could be doing everything completely wrong. From what I understand in the documentation a Metal or GL shader can be used to modify SceneKit rendering as of iOS 9 and Xcode 7. The documentation suggests that this is done in the same way as GL shaders. My method is to try and get the path for the .metal file and then load it into a string to be used

I'm setting my SceneKit camera to the current CMDeviceMotion attitude using the CMDeviceMotion extension described in this answer : func deviceDidMove(motion: CMDeviceMotion?, error: NSError?) { if let motion = motion { let orientation = motion.gaze(atOrientation: UIApplication.sharedApplication().statusBarOrientation) cameraNode.orientation = orientation } } This works beautifully, however, I'd like to block the rotation (roll) and only allow the camera to turn around (yaw) and pitch. I tried to convert the quaternion back to Euler angles and simply leave roll at 0: cameraNode.eulerAngles =

Good afternoon, I'm trying to figure out how to get touch notifications from an SCNNode & a SKSpriteNode from an SCNScene overlayed with a SKScene. import UIKit import SceneKit class GameViewController: UIViewController { var scnView:SCNView! var scnScene:SCNScene! var sprite: spritekitHUD! var cameraNode: SCNNode! var shape: SCNNode! override func viewDidLoad() { super.viewDidLoad() setupScene() } func setupScene() { scnView = self.view as! SCNView scnView.delegate = self scnView.allowsCameraControl = true scnScene = SCNScene(named: "art.scnassets/scene.scn") scnView.scene = scnScene sprite

I am trying to create an ios 9 app for a project which will visualise 3d scenes with these special kind of theoretical lenses called glenses . A ray tracing program called TIM has already been written from the ground up for simulating these glenses and more, but it's infeasable to simply port this to ios. My understanding from searching the site (i.e. this answer and many others on shaders) is that it should be possible but I'm having a hard time getting the desired effect. I decided that I would start by implementing a simpler form of refraction first before moving onto the more complex glens

Having fun with the alignmentMode option on SCNText. Been googling around and it looks like there is a problem with alignmentMode and containerFrame. The alternatives I've found suggest using the get bounding box function to find the text size and then manually adjust accordingly. Great except I cant get the function to work. When I try to get the two vectors I get an error: 'SCNVector3' is not convertible to 'UnsafeMutablePointer < SCNVector3>' I get that both on the geometry and the node. example of the code is below func setCounterValue(counterValue:Int) { var v1 = SCNVector3(x: 0,y: 0,z: 0

I have a view that creates SCNView dynamically. It's scene is empty, but when I press a button I would like to add a node from separate scn file. This file contains animation, and I would like it to animate in main scene. The problem is that after adding object to the scene it's not animating. When I use this file as SCNView scene it works. isPlaying and loops are enabled. What else do I need to do to import such node with animation? Sample code below: override func viewDidLoad() { super.viewDidLoad() let scene = SCNScene() let sceneView = SCNView(frame: CGRect(x: 0, y: 0, width: 300, height: