看下這個 lu_ y 9o^
EDGES !! or CURVE QvK/31*QG
R=5 !! Vertex radius of curvature GDP@M)~6*
K=-1 !! Conic constant * 4GJ<
H=5 !! Outer aperture height /<s'@!W
O=0 !! Inner obscuration height 7Q} P}9n
CONIC X 0, 0 0 -2*R 1 0 K+1, Y (O) (H) !!構建拋物線 4(2}O-~
SHIFT Y 1 !!偏移 yInW?3
SWEEP AXIS 360 Z !!旋轉