:ȡάռƽ淽

ʽ:PlaneEqu(a)

a3*3ľÿһд洢һάռ,е123зֱʾռֵ

˵ִгɹֱ߷A*x+B*y+Z*c+D=0ϵ[A , B , C , D]ƽ淨=[A , B , C]