[英]SceneKit. Place nodes in one "surface"
The users draw a line on drawing views and then I need to translate these points into 3d world, but place these points in one "surface".用户在图纸视图上画一条线,然后我需要将这些点转换为 3d 世界,但将这些点放在一个“表面”中。 For this, I map the array of points into vectors (I use hitTest with.featurePoint) and then filter this array for the further one为此,我将点数组 map 转换为向量(我使用 hitTest with.featurePoint),然后过滤该数组以获取下一个
func didEndDrawing(with points: [CGPoint]) {
guard let transform = sceneView.pointOfView?.transform else { return }
let cameraVectror = SCNVector3(transform.m31, transform.m32, transform.m33)
let farthestVector = points
.reduce((vector: SCNVector3(0, 0, 0), distance: CGFloat.zero)) { result, point in
guard let vector = getVector(for: point) else { return result }
let distance: CGFloat = cameraVectror.distance(to: vector)
return distance > result.distance ? (vector, distance) : result
}
.vector
}
let parentNode = SCNNode()
parentNode.position = farthestVector
How can I adjust coordinates (I guess z position) to have all the child nodes at the same distance from the point of view?如何调整坐标(我猜是 z 位置)以使所有子节点与视点的距离相同? The idea of the app is freehand drawing in AR.该应用程序的想法是在 AR 中手绘。
Update更新
With Voltan's help I was able to solve it在沃尔坦的帮助下,我能够解决它
points.forEach { point in
let scenePoint = sceneView.unprojectPoint(SCNVector3(point.x, point.y, CGFloat(projectedPoint.z)))
let sphere = SCNSphere(radius: 0.01)
let material = SCNMaterial()
material.diffuse.contents = UIColor.green
sphere.materials = [material]
let node = SCNNode(geometry: sphere)
node.position = scenePoint
sceneView.scene.rootNode.addChildNode(node)
}
If I'm understanding correctly, you want some kind of tap/drag combination - get the points from the 2D world and translate to a 3D world.如果我理解正确,您需要某种点击/拖动组合 - 从 2D 世界中获取点并转换为 3D 世界。 This is some game code for a missile command type game, maybe it will help you with unprojectPoint stuff.这是导弹命令类型游戏的一些游戏代码,也许它会帮助你处理 unprojectPoint 的东西。 There are some timers that aren't included, but hopefully you will get the idea.有一些计时器不包括在内,但希望您能明白这一点。
@objc func handleTap(recognizer: UITapGestureRecognizer)
{
if(data.gameState == .endGame)
{
endGameAnimates.stop()
let _ = Timer.scheduledTimer(withTimeInterval: 1, repeats: false, block: { _ in self.dismiss(animated: false, completion: nil) })
return
}
if(gameControl.isWaveComplete == true || gNodes.gameNodes.isPaused == true) { return }
currentLocation = recognizer.location(in: gameScene)
let projectedPoint = gameScene.projectPoint(SCNVector3(0, 0, 0))
let scenePoint = gameScene.unprojectPoint(SCNVector3(currentLocation.x, currentLocation.y, CGFloat(projectedPoint.z)))
if(data.gameState == .endGame) // Allow animations to finish, otherwise they will show up next round
{
DispatchQueue.main.async { self.endGameAnimates.stop() }
let _ = Timer.scheduledTimer(withTimeInterval: 1, repeats: false, block: { _ in self.dismiss(animated: false, completion: nil) })
return
}
if(data.missilesAvailable <= 0)
{
sound.playSoundType(vSoundType: .defenseFails)
hudControl.notify()
}
else
{
gameControl.defenseMissileShoot(vPosition: scenePoint, soundType: 0)
sound.playSoundType(vSoundType: .defenseFires)
}
}
//**************************************************************************
@objc func handlePan(recognizer: UIPanGestureRecognizer)
{
currentLocation = recognizer.location(in: gameScene)
let projectedPoint = gameScene.projectPoint(SCNVector3(0, 0, 0))
let scenePoint = gameScene.unprojectPoint(SCNVector3(currentLocation.x, currentLocation.y, CGFloat(projectedPoint.z)))
if(gameControl.isWaveComplete == true || gNodes.gameNodes.isPaused == true) { return }
switch recognizer.state
{
case UIGestureRecognizer.State.began:
gameControl.defenseMissileShoot(vPosition: scenePoint, soundType: 1)
SNDdefenseSoundCount = 0
if(data.missilesAvailable <= 0) { sound.playSoundType(vSoundType: .defenseFails); hudControl.notify() }
beginLocation.x = currentLocation.x
break
case UIGestureRecognizer.State.changed:
if(currentLocation.x > beginLocation.x + dragDistance)
{
beginLocation.x = currentLocation.x
if(data.missilesAvailable > 0) { gameControl.defenseMissileShoot(vPosition: scenePoint, soundType: 2) }
SNDdefenseSoundCount += 1
}
if(currentLocation.x < beginLocation.x - dragDistance)
{
beginLocation.x = currentLocation.x
if(data.missilesAvailable > 0) { gameControl.defenseMissileShoot(vPosition: scenePoint, soundType: 2) }
SNDdefenseSoundCount += 1
}
break
case UIGestureRecognizer.State.ended:
if(data.missilesAvailable > 0)
{
if(SNDdefenseSoundCount < 2) { sound.playSoundType(vSoundType: .defenseFires) }
else { sound.playSoundType(vSoundType: .defensePans) }
}
break
default:
break
}
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