UIKit proxy for visionOS 3D transforms and effects

V3DViewContainer.swift

//
//  V3DViewContainer.swift
//  Vision3DUIKit
//
//  Created by Steven Troughton-Smith on 02/02/2024.
//

import UIKit
import SwiftUI

struct _V3DViewWrapper: UIViewRepresentable {
	var view:UIView
	
	func makeUIView(context: Context) -> some UIView {
		return view
	}
	
	func updateUIView(_ uiView: UIViewType, context: Context) {
		
	}
}

struct V3DViewInternal: View {
	var view:UIView
	@ObservedObject var parent:V3DViewContainer
	
	var body: some View {
		if parent.realityGlassEnabled {
			_V3DViewWrapper(view: view)
				.glassBackgroundEffect(in: .rect(cornerRadius: parent.realityGlassCornerRadius))
				.rotation3DEffect(parent.realityRotation)
				.transform3DEffect(parent.realityTransform)
				.frame(depth: parent.realityDepth)
				.animation(.spring)
		}
		else {
			_V3DViewWrapper(view: view)
				.rotation3DEffect(parent.realityRotation)
				.transform3DEffect(parent.realityTransform)
				.frame(depth: parent.realityDepth)
				.animation(.spring)
		}
	}
}

class V3DViewContainer: UIView, ObservableObject {
	
	@Published var realityRotation:Rotation3D = .identity
	
	@Published var realityTransform:AffineTransform3D = .identity
	@Published var realityDepth = 0.0
	
	@Published var realityGlassEnabled = false
	@Published var realityGlassCornerRadius = CGFloat.zero
	
	let contentView:UIView
	
	var hostingController:UIHostingController<V3DViewInternal>? = nil
	
	init(contentView:UIView) {
		self.contentView = contentView
		super.init(frame: .zero)
		
		hostingController = UIHostingController(rootView: V3DViewInternal(view: contentView, parent:self))
		
		if let hostingController {
			hostingController.view.autoresizingMask = [.flexibleWidth, .flexibleHeight]
			addSubview(hostingController.view)
		}
	}
	
	required init?(coder: NSCoder) {
		fatalError("init(coder:) has not been implemented")
	}
	
}