arkit

I am trying to implement some code based on an ARKit demo where someone used this helper function to place a waypoint let rotationMatrix = MatrixHelper.rotateAboutY( degrees: bearing * -1 ) How can I implement the .rotateAboutY function using the SIMD library and not using GLKit? To make it easier, I could start from the origin point. I'm not too handy with the matrix math so a more basic explanation would be helpful. The rotation around Y matrix is: | cos(angle) 0 sin(angle)| | 0 1 0 | |-sin(angle) 0 cos(angle)| Rotation counter-clockwise around Y: |cos(angle) 0 -sin(angle)| | 0 1 0 | |sin

I am looking to add a billboarding effect that is similar to this application: https://twitter.com/marpi_/status/897130955105644544 I would like SCNodes that use SCNText geometry to always face the camera. I have attempted with out success: SCNLookAtConstraint with sceneView.pointOfView as the target, but this rotates the node to face away from the camera, resulting in backwards text, and unable to change the nodes position or euler angle. Out of the box, an SKLabelNode will always face the camera in ARKit, which is exactly what I want, except using SCNText. You were almost there! Just modify

In my Swift / ARKit / SceneKit project, I need to tell if the user's face in front-facing camera is parallel to the camera. I was able to tell horizontal parallel by comparing the left and right eyes distance (using faceAnchor.leftEyeTransform and the worldPosition property) from the camera. But I am stuck on vertical parallel. Any ideas, how to achieve that? Assuming you are using ARFaceTrackingConfiguration in your app, you can actually retrieve the transforms of both the ARFaceAnchor and the camera to determine their orientations. You can get a simd_float4x4 matrix of the head's orientation

This question already has an answer here: Scenekit shape between 4 points 1 answer Similar to some of the measuring apps you can see being demonstrated in ARKit, I have a plane with 2 marker nodes on it and a line drawn between the 2. What I need though is an SCNPlane between the 2. So, if your original was the floor and you put a marker either side of a wall, you could represent the physical wall with a SCNPlane in your AR world. Currently I'm placing the line with the following code: let line = SCNGeometry.lineFrom(vector: firstPoint.position, toVector: secondPoint.position) let lineNode =

I am using ARKit to detect walls at runtime, I use a hit test of type .estimatedVerticalPlane when some point of the screen is touched. I am trying to apply Y rotation to node corresponding to the detected plane orientation. I want to compute the rotation in : private func computeYRotationForHitLocation(hitTestResult: ARHitTestResult) -> Float { guard hitTestResult.type == .estimatedVerticalPlane else { return 0.0 } // guard let planeAnchor = hitTestResult.anchor as? ARPlaneAnchor else { return 0.0 } // guard let anchoredNode = sceneView.node(for: planeAnchor) else { return 0.0 } let