看下這個 'N$hbl
EDGES !! or CURVE "p>$^
R=5 !! Vertex radius of curvature )(~s-x^\z@
K=-1 !! Conic constant 1@Dp<Q
H=5 !! Outer aperture height s(56aE
O=0 !! Inner obscuration height [:gPp)f,
CONIC X 0, 0 0 -2*R 1 0 K+1, Y (O) (H) !!構建拋物線 2XhtK
SHIFT Y 1 !!偏移 ,4oYKJ$+h
SWEEP AXIS 360 Z !!旋轉