text: (function() {
  
      var World = Matter.World,
          Bodies = Matter.Bodies;
  
      Example.rounded = function(demo) {
          var engine = demo.engine,
              world = engine.world;
  
          World.add(world, [
              Bodies.rectangle(200, 200, 100, 100, { 
                  chamfer: { radius: 20 }
              }),
  
              Bodies.rectangle(300, 200, 100, 100, { 
                  chamfer: { radius: [90, 0, 0, 0] }
              }),
  
              Bodies.rectangle(400, 200, 200, 200, { 
                  chamfer: { radius: [150, 20, 40, 20] }
              }),
  
              Bodies.rectangle(200, 200, 200, 200, { 
                  chamfer: { radius: [150, 20, 150, 20] }
              }),
  
              Bodies.rectangle(300, 200, 200, 50, { 
                  chamfer: { radius: [25, 25, 0, 0] }
              }),
  
              Bodies.polygon(200, 100, 8, 80, { 
                  chamfer: { radius: 30 }
              }),
  
              Bodies.polygon(300, 100, 5, 80, { 
                  chamfer: { radius: [10, 40, 20, 40, 10] }
              }),
  
              Bodies.polygon(400, 200, 3, 50, { 
                  chamfer: { radius: [20, 0, 20] }
              })
          ]);
  
          var renderOptions = engine.render.options;
          renderOptions.showAxes = true;
          renderOptions.showCollisions = true;
      };
  
  })();