node.position = SCNVector3(from.x + (to.x - from.x) * 0.5,
                               from.y + height * 0.5,
                               from.z + (to.z - from.z) * 0.5)

// orientation of the wall is fairly simple. we only need to orient it around the y axis,
        // and the angle is calculated with 2d math.. now this calculation does not factor in the position of the
        // camera, and so if you move the cursor right relative to the starting position the
        // wall will be oriented away from the camera (in this app the wall material is set as double sided so you will not notice)
        // - obviously if you want to render something on the walls, this issue will need to be resolved.

    node.eulerAngles = SCNVector3(0,
                                  -atan2(to.x - node.position.x, from.z - node.position.z) - Float.pi * 0.5,
                                  0)