/*
See LICENSE folder for this sample’s licensing information.

Abstract:
Manages virtual overlays diplayed on the face in the AR experience.
*/

import ARKit
import SceneKit

enum VirtualContentType: Int {
    case transforms, texture, geometry, videoTexture, blendShape
    
    func makeController() -> VirtualContentController {
        switch self {
        case .transforms:
            return TransformVisualization()
        case .texture:
            return TexturedFace()
        case .geometry:
            return FaceOcclusionOverlay()
        case .videoTexture:
            return VideoTexturedFace()
        case .blendShape:
            return BlendShapeCharacter()
        }
    }
}

/// For forwarding `ARSCNViewDelegate` messages to the object controlling the currently visible virtual content.
protocol VirtualContentController: ARSCNViewDelegate {
    /// The root node for the virtual content.
    var contentNode: SCNNode? { get set }
    
    func renderer(_ renderer: SCNSceneRenderer, nodeFor anchor: ARAnchor) -> SCNNode?
    
    func renderer(_ renderer: SCNSceneRenderer, didUpdate node: SCNNode, for anchor: ARAnchor)
}