【发布时间】：2023-01-31 00:09:02
【问题描述】：
我有一个球和一个圆柱体。当我轻敲球时，它会向前移动。当球击中圆柱体时，它们发生碰撞，圆柱体移动并改变颜色。那工作正常。
我有两个问题： 当我启动应用程序时，圆柱体不断碰撞并立即改变颜色，所以即使球不在它附近。它看起来像是与其他东西相撞。
第二件事是，场景中会有更多的圆柱体，我怎样才能只在两个物体之间产生碰撞事件。假设场景中有 2 个圆柱体，如何设置过滤器或组。
import SwiftUI
import RealityKit
import ARKit
import FocusEntity
import Combine
struct ContentView : View {
var body: some View {
ARViewContainer()
}
}
struct ARViewContainer: UIViewRepresentable {
func makeUIView(context: Context) -> ARView {
let view = ARView()
let session = view.session
let config = ARWorldTrackingConfiguration()
config.planeDetection = .horizontal
session.run(config)
let coachingOverlay = ARCoachingOverlayView()
coachingOverlay.autoresizingMask = [.flexibleWidth, .flexibleHeight]
coachingOverlay.session = session
coachingOverlay.goal = .horizontalPlane
view.addSubview(coachingOverlay)
context.coordinator.view = view
session.delegate = context.coordinator
view.addGestureRecognizer(UITapGestureRecognizer(target: context.coordinator, action: #selector(Coordinator.handleTap)))
return view
}
func updateUIView(_ uiView: ARView, context: Context) {}
func makeCoordinator() -> Coordinator {
Coordinator()
}
//coordinator class
class Coordinator: NSObject,ARSessionDelegate {
weak var view: ARView?
var focusEntity: FocusEntity?
@Published var sceneIsPlaced:Bool = false //is de scene reeds geplaats na openen app
@Published var subscriptions: [AnyCancellable] = []
func session(_ session: ARSession, didAdd anchors: [ARAnchor]) {
guard let view = self.view else { return }
self.focusEntity = FocusEntity(on: view, style: .classic(color: .yellow))
}
//na tap op het scherm, wat te doen -> creeer locatie en plaats het object
@objc func handleTap(recognizer: UITapGestureRecognizer) {
guard let view = self.view, let focusEntity = self.focusEntity else { return }
//tap location van de tap gesture
let tapLocation = recognizer.location(in: self.view)
//Create Anchor
let anchor = AnchorEntity()
let importModel = try! Entity.load(named: "cilinder") //alle objects!
importModel.position = focusEntity.position
importModel.scale = SIMD3(repeating: 0.5)
//The cylinder
let kolomMiddleModel = importModel.findEntity(named: "cilinder")!.children[0] as! (ModelEntity & HasPhysicsBody & HasCollision)
let materialKolomMiddle = SimpleMaterial(color: .yellow, isMetallic: true)
kolomMiddleModel.model?.materials = [materialKolomMiddle]
kolomMiddleModel.generateCollisionShapes(recursive: false)
let physics = PhysicsBodyComponent(massProperties: .default, material: .default, mode: .dynamic)
kolomMiddleModel.components.set(physics)
//MAKE A BALL
let materialsBall = SimpleMaterial(color: .red, isMetallic: true)
let ballModel = ModelEntity(mesh: .generateSphere(radius: 0.1),
materials: [materialsBall])
as (Entity & HasPhysicsBody & HasCollision)
ballModel.position = [-0.1, -1.0,-0.1]
ballModel.generateCollisionShapes(recursive: true)
ballModel.name = "ballModel"
//LIGHTS --> let op voor de shadow moet de plane van occlusion material met dynamical lightning op tue
let directionalLight = DirectionalLight()
directionalLight.light.color = .white
directionalLight.light.intensity = 4000
directionalLight.light.isRealWorldProxy = true
directionalLight.shadow?.maximumDistance = 1.5
directionalLight.shadow?.depthBias = 7.0
directionalLight.orientation = simd_quatf(angle: .pi/1.5, axis: [0,1,0])
//maak een anchor voor het licht
let lightAnchor = AnchorEntity(world: [0, 0, 2.5])
lightAnchor.addChild(directionalLight)
//COLLISION EVENTS
DispatchQueue.main.async {
//collision of kolomModel
view.scene.subscribe(to: CollisionEvents.Began.self,
on: kolomMiddleModel) { _ in
print("Collision kolomModel detected!")
let material = SimpleMaterial(color: .red, isMetallic: true)
kolomMiddleModel.model?.materials = [material]
}.store(in: &self.subscriptions)
}
// view.installGestures(for: ballModel)
//
//PLACE SCENE IF NOT PLACED ALREADY
if !sceneIsPlaced {
//ADD MODELS TO ANCHOR
anchor.addChild(importModel)
anchor.addChild(ballModel)
anchor.addChild(lightAnchor)
view.scene.addAnchor(anchor)
sceneIsPlaced = true
//If the scene is already placed get the taplocation
}else{
if let locationEntity = view.entity(at: tapLocation) {
let entityTapped = locationEntity as! ModelEntity
//MAKE THE BALL GO FORWARD
print("entity tapped \(entityTapped)")
entityTapped.physicsBody = .init()
entityTapped.physicsBody?.mode = .kinematic
entityTapped.physicsMotion = PhysicsMotionComponent(linearVelocity: [0, 0, -0.5],
angularVelocity: [1, 3, 5])
}
}
}
}
}
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标签： swiftui arkit realitykit