看下這個 /J'dG%
EDGES !! or CURVE ,6a }l;lv
R=5 !! Vertex radius of curvature E%>){Y)
K=-1 !! Conic constant |p+ xM
H=5 !! Outer aperture height f%Bm x{Ttq
O=0 !! Inner obscuration height As*59jkB
CONIC X 0, 0 0 -2*R 1 0 K+1, Y (O) (H) !!構建拋物線 "a>a
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SHIFT Y 1 !!偏移 PRF^<%mkI
SWEEP AXIS 360 Z !!旋轉