看下這個 !&`\MD>;~R
EDGES !! or CURVE U!K#g_}
R=5 !! Vertex radius of curvature (
z F_<
K=-1 !! Conic constant k,; (`L
H=5 !! Outer aperture height #JY>
O=0 !! Inner obscuration height F1L[C4'
CONIC X 0, 0 0 -2*R 1 0 K+1, Y (O) (H) !!構建拋物線 <b\8<mTr
SHIFT Y 1 !!偏移 .7:ecFKk
SWEEP AXIS 360 Z !!旋轉