code: @Override
  	public void compute(int x, int y, Point2D_F32 out ) {
  		// grab precomputed normalized image coordinate at canonical location
  		Point3D_F32 v = vectors[y*outWidth+x];
  		// move to requested orientation
  		GeometryMath_F32.mult(R,v,n); // TODO make faster by not using an array based matrix
  
  		// compute pixel coordinate
  		tools.normToEquiFV(n.x,n.y,n.z,out);
  	}
docs: Input is in pinhole camera pixel coordinates.  Output is in equirectangular coordinates
  
  @param x Pixel x-coordinate in rendered pinhole camera
  @param y Pixel y-coordinate in rendered pinhole camera