!!omap
- name: springmass
- parts:
  - name: head
    shapes:
      libraries: ['from math import tan, radians, sin, cos', 'from pysketcher import *']
  - name: constants
    shapes:
        L: 12.
  - name: frame
    shapes:
        H: L/6
        W: L/6
        xmax: L
        x: 0        
        setframe:
            action: drawing_tool.set_coordinate_system(xmin=-L, xmax=xmax,
                                   ymin=-1, ymax=L+H,
                                   axis=False,
                                   instruction_file='tmp_mpl_spring_mass.py')
        globallinecolor:
            action: drawing_tool.set_linecolor('black')
        s_start: (-L,4*H)
        spring: 
            formula: Spring(start=s_start, length=L+x, bar_length=3*H/2, teeth=True)
            transform: rotate(-90, s_start)
        M: Rectangle((0,H), 4*H, 4*H).set_linewidth(4)
        left_wall: Rectangle((-L,0),H/10,L).set_filled_curves(pattern='/')
        ground: Wall(x=[-L/2,L], y=[0,0], thickness=-H/10)
        wheel1: Circle((H,H/2), H/2)
        wheel2: 
            formula: wheel1.copy()
            transform: translate(point(2*H, 0))

        fontsize: 18
        text_m: Text('$m$', (2*H, H+2*H), fontsize=fontsize)
        text_ku: Text('$ku$', (-L/2, H+4*H), fontsize=fontsize)
        text_bv: Text("$bu'$", (-L/2, H), fontsize=fontsize)
        x_axis: Axis((2*H, L), H, '$u(t)$', fontsize=fontsize,
                     label_spacing=(0.04, -0.01))
        x_axis_start: 
            formula: Line((2*H, L-H/4), (2*H, L+H/4))
            style:
                linewidth: 4

        springmass: |
                      Composition({
                        'spring': spring, 'mass': M, 'left wall': left_wall,
                        'ground': ground, 'wheel1': wheel1, 'wheel2': wheel2,
                        'text_m': text_m, 'text_ku': text_ku,
                        'x_axis': x_axis, 'x_axis_start': x_axis_start})