scenekit

I should see 2 yellow triangles, but I see nothing. class Terrain { private class func createGeometry () -> SCNGeometry { let sources = [ SCNGeometrySource(vertices:[ SCNVector3(x: -1.0, y: -1.0, z: 0.0), SCNVector3(x: -1.0, y: 1.0, z: 0.0), SCNVector3(x: 1.0, y: 1.0, z: 0.0), SCNVector3(x: 1.0, y: -1.0, z: 0.0)], count:4), SCNGeometrySource(normals:[ SCNVector3(x: 0.0, y: 0.0, z: -1.0), SCNVector3(x: 0.0, y: 0.0, z: -1.0), SCNVector3(x: 0.0, y: 0.0, z: -1.0), SCNVector3(x: 0.0, y: 0.0, z: -1.0)], count:4) ] let elements = [ SCNGeometryElement(indices: [0, 2, 3, 0, 1, 2], primitiveType:

I've been playing with SceneKit, but I can't figure how to create a per vertex color geometry. So to be more precise, I would like to do this : http://openglbook.com/chapter-2-vertices-and-shapes.html Let me know if it's not clear Thanks. Pour info : sceneView = SCNView(frame: sceneContainer.bounds) sceneView.scene = SCNScene() sceneView.allowsCameraControl = true sceneView.autoenablesDefaultLighting = true sceneView.showsStatistics = true sceneView.backgroundColor = UIColor.darkGrayColor() self.sceneContainer.addSubview(sceneView) // Vertex let vertices: [SCNVector3] = [SCNVector3(0, 0, 0),

The image below shows a rotated box that should be moved horizontally on the X and Z axes. Y should stay unaffected to simplify the scenario. The box could also be the SCNNode of the camera, so I guess a projection does not make sense at this point. So lets say we want to move the box in the direction of the red arrow. How to achieve this using SceneKit? The red arrow indicates -Z direction of the box. It also shows us it is not parallel to the camera's projection or to the global axes that are shown as dark grey lines of the grid. My last approach is the product of a translation matrix and a

This area is hardly documented online and it would be great to see a working Swift 3 example, of say, a custom drawn cube with manual SCNvector3s. There is this in objective-C but not Swift. This might not be a usual form of question but I know it would help many. If there is somewhere I missed, please mention. The documentation is not very helpful scngeometrysource, etc. Thanks 0x141E A custom geometry is constructed from a set of vertices and normals. Vertices In this context, a vertex is a point where two or more lines intersect. For a cube, the vertices are the corners shown in the

After what I've read in the documentation and on the internet a SCNBillboardConstraint would rotate a node to always face the pointOfView node - in the case of ARKit , the user's camera. The thing is, when I add a SCNBillboardConstraint to a child node, it dissapears. The nodes are just some SCNTexts added as a subchild of a more complex model. The hierarchy looks something like this: RootNode - > Text node (two of them). Just after I added the root node to the scene's root node, I add this constraint in the following way: updateQueue.async { self.sceneView.scene.rootNode.addChildNode

I would like to create a prototype like this one : just using Xcode SceneKit Editor. I found an answer where the room is created programmatically with simple SCNPlane objects and playing around with the rendering order. However, I would like to put together something more elaborated like downloading the 3d model of a room and make it accessible only through the portal. I'm trying to achieve the same effect directly in the Xcode's SceneKit editor converting this part: //a. Create The Left Wall And Set Its Rendering Order To 200 Meaning It Will Be Rendered After Our Masks let leftWallNode =