看下這個 ;v'7l>w3\w
EDGES !! or CURVE 4J0{$Xuu0
R=5 !! Vertex radius of curvature 0-p LCf
K=-1 !! Conic constant Z m9 e|J
H=5 !! Outer aperture height 9PjL
4A
O=0 !! Inner obscuration height ez=$ ]cln
CONIC X 0, 0 0 -2*R 1 0 K+1, Y (O) (H) !!構建拋物線 })!d4EcZf
SHIFT Y 1 !!偏移 tRRPNY
SWEEP AXIS 360 Z !!旋轉