看下這個 LAKZAi%O0
EDGES !! or CURVE X|QCa@Foe
R=5 !! Vertex radius of curvature %~;Q_#CR/K
K=-1 !! Conic constant '; dW'Uwc
H=5 !! Outer aperture height Y) h%<J
O=0 !! Inner obscuration height #-Rz`Y<&
CONIC X 0, 0 0 -2*R 1 0 K+1, Y (O) (H) !!構建拋物線 0;H6b=
SHIFT Y 1 !!偏移 u20b+c4
SWEEP AXIS 360 Z !!旋轉