Swift Game Development - Third Edition

Adding objects to the scene

Let's next add geometry to the scene. We can create basic geometry such as spheres, boxes, cones, tori, and so on in SceneKit with a lot of ease. Let's create a sphere first and add it to the scene.

Adding a sphere

Create a new function called addGeometryNodes in the GameViewController class, as follows:

func addGeometryNode() {

   let sphereGeometry = SCNSphere(radius: 1.0)
   sphereGeometry.firstMaterial?.diffuse.contents = UIColor.orange
        
   let sphereNode = SCNNode(geometry: sphereGeometry)
   sphereNode.position = SCNVector3Make(0.0, 0.0, 0.0)
   self.rootNode.addChildNode(sphereNode)        
}

We will use the SCNSphere class to create a sphere. We can also call SCNBox, SCNCone, SCNTorus, and so on to create a box, a cone, or a torus.