2D Elipse x0,y0 is the center of the elipse x1,y1 is the radius at 0 degrees x2,y2 is the radius at 90 degrees
if you have a circle of radius 1 at the origin, then imagine it transformed so that.. (0,0)-->(x0,y0) (1,0)-->(x1,y1) (0,1)-->(x2,y2)
Undocumented in source.
See Implementation
2D Elipse x0,y0 is the center of the elipse x1,y1 is the radius at 0 degrees x2,y2 is the radius at 90 degrees
if you have a circle of radius 1 at the origin, then imagine it transformed so that.. (0,0)-->(x0,y0) (1,0)-->(x1,y1) (0,1)-->(x2,y2)