DRAW A NORMAL FROM A POINT TO AN ELLIPSE Ellipse major (longer) semi-axis length or radius for circle: [Ac] Ellipse minor (shorter) semi-axis or radius for circle: [Bc] Ellipse center X coordinate [Cx]: Ellipse center Y coordinate [Cy]: Rotation angle of ellipse with x-axis (positive counterclockwise)[ϑ1]: Point X coordinate [Px]: Point Y coordinate [Py]: