将平面节点垂直和水平添加到ARKit场景
将平面节点垂直和水平添加到ARKit场景
提问于 2018-12-17 01:50:47
我希望我的应用程序将节点放置在表面上，可以是垂直的也可以是水平的。但是，节点始终是垂直的。这是一张图片，这些节点没有正确放置。
@objc func didTapAddButton() {
let screenCentre = CGPoint(x: self.sceneView.bounds.midX, y: self.sceneView.bounds.midY)
let arHitTestResults: [ARHitTestResult] = sceneView.hitTest(screenCentre, types: [.featurePoint]) // Alternatively, we could use '.existingPlaneUsingExtent' for more grounded hit-test-points.
if let closestResult = arHitTestResults.first {
let transform: matrix_float4x4 = closestResult.worldTransform
let worldCoord: SCNVector3 = SCNVector3Make(transform.columns.3.x, transform.columns.3.y, transform.columns.3.z)
if let node = createNode() {
sceneView.scene.rootNode.addChildNode(node)
node.position = worldCoord
}
}
}
func createNode() -> SCNNode? {
guard let theView = myView else {
print("Failed to load view")
return nil
}
let plane = SCNPlane(width: 0.06, height: 0.06)
let imageMaterial = SCNMaterial()
imageMaterial.isDoubleSided = true
imageMaterial.diffuse.contents = theView.asImage()
plane.materials = [imageMaterial]
let node = SCNNode(geometry: plane)
return node
}应用程序能够看到地面，但节点仍然与我们平行。我该如何解决这个问题呢？
编辑:我想我可以使用node.eulerAngles.x = -.pi / 2，这可以确保平面是水平放置的，但在垂直表面上仍然是水平的。
回答 1
Stack Overflow用户
回答已采纳
发布于 2018-12-17 05:08:00
解决了！下面是如何让视图始终与相机“平行”的方法：
let yourNode = SCNNode()
let billboardConstraint = SCNBillboardConstraint()
billboardConstraint.freeAxes = [.X, .Y, .Z]
yourNode.constraints = [billboardConstraint]或
guard let currentFrame = sceneView.session.currentFrame else {return nil}
let camera = currentFrame.camera
let transform = camera.transform
var translationMatrix = matrix_identity_float4x4
translationMatrix.columns.3.z = -0.1
let modifiedMatrix = simd_mul(transform, translationMatrix)
let node = SCNNode(geometry: plane)
node.simdTransform = modifiedMatrix页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/53804913
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