i want sprite can move width anchorX and anchorY 0.5 along the curvature, but i try it "xPercent: -50, yPercent: -50, transformOrigin: "50% 50%", it's only useful like element, what can i do to make sprite in pixi?  See the Pen oNgqrJP by bigblueblue (@bigblueblue) on CodePen