ドア全体を描画します。
//**********************************************************************************
union {
object { Frame_seg pigment { color rgb <0,1,0> } }
union {
object { Door_seg pigment { color rgb <0,1,0> } }
object { Knob_seg pigment { color rgb <1,1,0> } }
object { Metal_seg }
translate Wd*x rotate 0*y translate -Wd*x }
rotate 30*y }
//**********************************************************************************
