Cast shadow on all nodes SCNLight - ios

Question

I am trying to cast a short dark shadow from the left of the scene. My light settings are the following:
func setupLights() {
// Create shadow
let spotLight = SCNLight()
spotLight.type = SCNLightTypeSpot
spotLight.spotInnerAngle = 30.0
spotLight.spotOuterAngle = 80.0
spotLight.castsShadow = true
let spotLightNode = SCNNode()
spotLightNode.light = spotLight
spotLightNode.position = SCNVector3(1.5, 1.5, 1.5)
rootNode.addChildNode(spotLightNode)
// Create ambient light
let ambientLight = SCNLight()
ambientLight.type = SCNLightTypeAmbient
ambientLight.color = UIColor.whiteColor()
let ambientLightNode = SCNNode()
ambientLightNode.name = "AmbientLight"
ambientLightNode.light = ambientLight
ambientLightNode.castsShadow = true
rootNode.addChildNode(ambientLightNode)
// Create an omni-directional light
let omniLight = SCNLight()
omniLight.type = SCNLightTypeOmni
omniLight.color = UIColor.whiteColor()
let omniLightNode = SCNNode()
omniLightNode.name = "OmniLight"
omniLightNode.light = omniLight
omniLightNode.position = SCNVector3(x: -10.0, y: 20, z: 10.0)
omniLightNode.castsShadow = true
rootNode.addChildNode(omniLightNode)
}
With this code I have a bright scene with some very light and long shadow not coming from the left. I tried to alter the position which currently is SCNVector3(1.5, 1.5, 1.5), however whichever other position I put, the shadow just disappears. Any ideas?

Answer 1

If you want directional light on all parts of the scene, use SCNLightTypeSpot for your light's type. Or maybe SCNLightTypeDirectional.
Per documentation for SCNLight.castsShadow:
Geometries illuminated by the light cast shadows only if the value of this property is YES and the type property of the light is SCNLightTypeSpot. The default value is NO.
However, #mnuages states in SceneKit shadows on wall that directional lights can cast shadows.