看下這個 y
a$yRsd`
EDGES !! or CURVE n$ByTmKxv
R=5 !! Vertex radius of curvature pej-W/R&
K=-1 !! Conic constant dZ"}wKbO
H=5 !! Outer aperture height ecm+33C
O=0 !! Inner obscuration height
c2V_|oL
CONIC X 0, 0 0 -2*R 1 0 K+1, Y (O) (H) !!構建拋物線 &=t~_ Dc
SHIFT Y 1 !!偏移 At>e4t2@
SWEEP AXIS 360 Z !!旋轉