看下這個 EM!S ;i
EDGES !! or CURVE }J92TV
R=5 !! Vertex radius of curvature qLc&.O.=
K=-1 !! Conic constant pv&iJ7RN
H=5 !! Outer aperture height #F2DEo^0
O=0 !! Inner obscuration height QZa^Cng~
CONIC X 0, 0 0 -2*R 1 0 K+1, Y (O) (H) !!構建拋物線 ?hR0
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SHIFT Y 1 !!偏移 AN[pjC<
SWEEP AXIS 360 Z !!旋轉