{ {% for body in bodies %}
    {% if not forloop.first %}, {% endif %}
    "{{body.name}}": [
      {% for fixture in body.fixtures %}{% if not forloop.first %} ,{% endif %}
      {
        "density": {{fixture.density}}, "friction": {{fixture.friction}}, "bounce": {{fixture.bounce}}, {% if fixture.isSensor %}"isSensor"=true, {% endif %}
          "filter": { "categoryBits": {{fixture.filter_categoryBits}}, "maskBits": {{fixture.filter_maskBits}} },
        "polygons":[ 
          {% for polygon in fixture.polygons %}{% if not forloop.first %} ,{% endif %}
          [ {% for point in polygon %} {% if not forloop.first %}, {% endif %} {{point.x}}, {{point.y}} {% endfor %} ]
          {% endfor %}
        ]
      }
      {% endfor %}
    ]
    {% endfor %}
  }