lapfelix/arkit-line-drawing

Changed the default ARKit project to draw a line where the camera is positioned

ARKit-line-drawing

Changed the default ARKit project to draw a line where the camera is positioned

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arkit-line-drawing's Issues

In what use case this will be useful?

Just wandering in what use case this will be useful?

lagging so much

Does anyone know how we can better the fps? the frame rate will drop so fast and the app becomes so slow.

SCNScene init failure

let scene = SCNScene(named: "art.scnassets/art.scn")!

Question about the coordinates mapping

Hi, this project is really awesome! I just want to ask one question about coordinates mapping:

 let mat = SCNMatrix4FromMat4(currentFrame.camera.transform)
        let dir = SCNVector3(-1 * mat.m31, -1 * mat.m32, -1 * mat.m33)
        let currentPosition = pointOfView.position + (dir * 0.1)

Could you please explain what does these code do?
What's the meaning of sceneView.pointOfView and its difference between currentFrame?

And , I also wondered to calculate the current position of line point to start drawing, why can't I use the following code?

func getCameraCoordinate(sceneView: ARSCNView) -> SCNVector3 {
        let cameraTransform = sceneView.session.currentFrame?.camera.transform
        let cameraCoordinates = MDLTransform(matrix: cameraTransform!)
        return SCNVector3(x: cameraCoordinates.translation.x, y: cameraCoordinates.translation.y, z: cameraCoordinates.translation.z)
    }

Thank you very much.

GLLineWidth Doesn't Work

When you change the integer within GLLineWidth(x) it doesn't work on changing the actual line.

Trouble building in xcode 9 beta 2

I'm getting an error building the project in Xcode 9 beta 2. The error I'm getting is
"SCNMatrix4FromMat4 is unavailable in swift" viewController line 67

How to change the size of the line

Nice AR implementation, i wonder how to change the size of the line, also if I can make it custom line?

Unable to change line width, `glLineWidth` not effective

This line doesn't seem to be affecting the line width: https://github.com/lapfelix/ARKit-line-drawing/blob/master/ARKitDraw/ViewController.swift#L77

Do we have all the necessary imports/packages?