ARKit Place a SCNNode facing the camera

Question

I\'m using ARKit to display 3D objects. I managed to place the nodes in the real world in front of the user (aka the camera). But I don\'t manage to make them to fa

Answer 1

Here's how I did it:

func faceCamera() {
    guard constraints?.isEmpty ?? true else {
        return
    }
    SCNTransaction.begin()
    SCNTransaction.animationDuration = 5
    SCNTransaction.completionBlock = { [weak self] in
        self?.constraints = []
    }
    constraints = [billboardConstraint]
    SCNTransaction.commit()
}

private lazy var billboardConstraint: SCNBillboardConstraint = {
    let constraint = SCNBillboardConstraint()
    constraint.freeAxes = [.Y]
    return constraint
}()

As stated earlier a SCNBillboardConstraint will make the node always look at the camera. I am animating it so the node doesn't just immediately snap into place, this is optional. In the SCNTransaction.completionBlock I remove the constraint, also optional.

Also I set the SCNBillboardConstraint's freeAxes, which customizes on what axis the node follows the camera, again optional.