# File ../lib/fox/glshapes.rb, line 108
    def bounds
      FXRange.new(min(@fm.pos[0], @to.pos[0]),
                  max(@fm.pos[0], @to.pos[0]),
                  min(@fm.pos[1], @to.pos[1]),
                  max(@fm.pos[1], @to.pos[1]),
                  min(@fm.pos[2], @to.pos[2]),
                  max(@fm.pos[2], @to.pos[2]))
    end