看下這個 Ri-wbYFaP
EDGES !! or CURVE eZJOI1wNp
R=5 !! Vertex radius of curvature "|&*MjwN6
K=-1 !! Conic constant XJ NKM~
H=5 !! Outer aperture height hQ8{
A7
O=0 !! Inner obscuration height V[#lFl).
CONIC X 0, 0 0 -2*R 1 0 K+1, Y (O) (H) !!構建拋物線 )DLK<10
SHIFT Y 1 !!偏移 da^9Fb
SWEEP AXIS 360 Z !!旋轉