let
让
n0 =
nx*cos(a) + nz*cos(b)*sin(a) + ny*sin(a)*sin(b)
ny*cos(b) - nz*sin(b)
nz*cos(a)*cos(b) - nx*sin(a) + ny*cos(a)*sin(b)
n0 =
nx*cos(a) + nz*cos(b)*sin(let
让
n0 =
nx*cos(a) + nz*cos(b)*sin(a) + ny*sin(a)*sin(b)
ny*cos(b) - nz*sin(b)
nz*cos(a)*cos(b) - nx*sin(a) + ny*cos(a)*sin(b)
n0 =
nx*cos(a) + nz*cos(b)*sin(