看下這個 ^1()W,B~w
EDGES !! or CURVE -<_+-t
R=5 !! Vertex radius of curvature _%XbxP6rH
K=-1 !! Conic constant ;Kt'Sit
H=5 !! Outer aperture height 3KR2TcT#{
O=0 !! Inner obscuration height EC0zH#N
CONIC X 0, 0 0 -2*R 1 0 K+1, Y (O) (H) !!構建拋物線 hwc:@'
SHIFT Y 1 !!偏移 _3*: y/M_
SWEEP AXIS 360 Z !!旋轉