看下這個 o:PdPuZVR
EDGES !! or CURVE J;GYo|8
R=5 !! Vertex radius of curvature k]=lo'bF4
K=-1 !! Conic constant
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H=5 !! Outer aperture height x:iLBYf
O=0 !! Inner obscuration height ZmAo9>'Kg
CONIC X 0, 0 0 -2*R 1 0 K+1, Y (O) (H) !!構建拋物線 g_;4@jwTP"
SHIFT Y 1 !!偏移 X86r`}
SWEEP AXIS 360 Z !!旋轉