makeFromRadians
fun makeFromRadians(scale: Float, radians: Float, tx: Float, ty: Float, ax: Float, ay: Float): RSXform
Initialize a new xform based on the scale, rotation (in radians), final tx,ty location and anchor-point ax,ay within the src quad.
Note: the anchor point is not normalized (e.g. 0...1) but is in pixels of the src image.