看下這個 :/vB,JC
EDGES !! or CURVE @mJN
R=5 !! Vertex radius of curvature qW7"qw=
K=-1 !! Conic constant Z{p6Q1u
H=5 !! Outer aperture height aG}9Z8D
O=0 !! Inner obscuration height qqzQKN
CONIC X 0, 0 0 -2*R 1 0 K+1, Y (O) (H) !!構建拋物線 a
LmVOL{
SHIFT Y 1 !!偏移 mZ;yk(
SWEEP AXIS 360 Z !!旋轉