看下這個 m%)S<L7
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EDGES !! or CURVE !s[gv1
R=5 !! Vertex radius of curvature
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K=-1 !! Conic constant fq !CB]C
H=5 !! Outer aperture height *xDV8iu_
O=0 !! Inner obscuration height :qtg `zM/4
CONIC X 0, 0 0 -2*R 1 0 K+1, Y (O) (H) !!構建拋物線 FQ]5W |e
SHIFT Y 1 !!偏移 <P-AlHYV-
SWEEP AXIS 360 Z !!旋轉