看下這個 .GL@`7"
EDGES !! or CURVE pZ3sp!
R=5 !! Vertex radius of curvature md!!$+a%|
K=-1 !! Conic constant e4tC[6 ;
H=5 !! Outer aperture height
]qu6/Z
O=0 !! Inner obscuration height >Gk<a
CONIC X 0, 0 0 -2*R 1 0 K+1, Y (O) (H) !!構建拋物線 rK`^A
SHIFT Y 1 !!偏移 dQ9W40g1
SWEEP AXIS 360 Z !!旋轉