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//
// Plane.swift
// TextAR
//
// Created by Arvind Ravi on 23/08/17.
// Copyright © 2017 Arvind Ravi. All rights reserved.
//
import Foundation
import ARKit
class Plane: SCNNode {
// MARK: - Properties
var anchor: ARPlaneAnchor
var height: CGFloat = 0.01
// MARK: - Initialization
init(_ anchor: ARPlaneAnchor) {
self.anchor = anchor
super.init()
// init geometry
self.geometry = SCNBox(width: CGFloat(anchor.extent.x), height: height, length: CGFloat(anchor.extent.z), chamferRadius: 0.0)
self.geometry?.firstMaterial?.diffuse.contents = UIColor.white.withAlphaComponent(0.5)
// init position
self.position = SCNVector3(
anchor.center.x,
anchor.center.y,
anchor.center.z
)
// physics
self.physicsBody = SCNPhysicsBody(type: .kinematic, shape: SCNPhysicsShape(geometry: geometry, options: nil))
// disable shadow for planes
castsShadow = false
}
required init?(coder aDecoder: NSCoder) {
fatalError("init(coder:) has not been implemented")
}
func update(_ anchor: ARPlaneAnchor) {
self.anchor = anchor
// update geometry
if let geometry = self.geometry as? SCNBox {
geometry.width = CGFloat(anchor.extent.x)
geometry.length = CGFloat(anchor.extent.z)
geometry.height = height
}
// update position
self.position = SCNVector3(
anchor.center.x,
anchor.center.y,
anchor.center.z
)
// physics
self.physicsBody = SCNPhysicsBody(type: .kinematic, shape: SCNPhysicsShape(geometry: geometry!, options: nil))
}
func hide() {
let transparentMaterial = SCNMaterial()
transparentMaterial.lightingModel = .constant
transparentMaterial.diffuse.contents = UIColor.white
transparentMaterial.colorBufferWriteMask = SCNColorMask.init(rawValue: 0)
transparentMaterial.transparencyMode = .aOne
transparentMaterial.transparency = 0
self.geometry?.materials = [transparentMaterial, transparentMaterial, transparentMaterial, transparentMaterial, transparentMaterial, transparentMaterial]
}
func unhide() {
self.geometry?.firstMaterial?.diffuse.contents = UIColor.white.withAlphaComponent(0.5)
}
}
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