{
  name:'My Simulation World',
  classes : {
    node: {
      behaviour:open('node.js'),
      visual:{
          shape:'circle',
          width:10,
          height:10,
          x:0,y:0,
          fill: {
            color:'red',
            opacity: 0.5
          }
        }
    },
    world : {
      behaviour:open('world.js'),
      visual:{
          shape:'circle',
          width:50,
          height:50,
          center:{x:0,y:0},
          fill: {
            color:'green',
            opacity: 0.0
          }
        }    
    }

  },
  // Simulation parameter that can be changed by run-time configuration
  parameter : {
    ip1:'localhost',
    ipport1:10002,
  },
  world : {
    init: {
      // Initial agent creation on each node
      agents: {
        node:function (nodeId,position,parameter) {
          // Create on each node a node agent, return respective
          // agent parameters! If no agent should be created on the 
          // respective node, undefined must be returned!
          // level 3: agents with full access to simulation world
          // parameter is either {} or given by world.nodes <desc>.parameter (see below)
          if (nodeId.indexOf('beacon')==0 || nodeId.indexOf('mobile')==0)
            return {level:3,args:[{x:position.x,y:position.y,parameter:parameter}]}
        },
        world: function(nodeId) {
          if (nodeId=='world') return {level:3,args:[{}]};
        }
      }
    },
    // Create nodes 
    nodes: function () {
        function makeNode(x,y,id) {
          var phy;
          if (id=='mobile device 1') r=80; else r=200;
          return {
            id:id,
            x:x,
            y:y,
            // node/agent parameter object for agent initialization (agent class node, see world.init.agents.node)
            // is stored in node.options.parameter, too
            parameter : {
              mysecret:(Math.random()*1000000)|0,
              dir : Aios.DIR.NORTH,
            },
            // create virtual communication ports
            ports: {
              wlan : {
                type:'multicast',
                status: function (nodes) {
                  // Filter out nodes, e.g., beacons only?
                  return nodes;
                },
                visual: {
                  shape:'circle',
                  width: r,
                  height: r,
                  line: {
                    color: 'grey'
                  }
                }
              },
              phy : phy
            },
          
            visual : {
              shape:'rect',
              width:30,
              height:30,
              fill: {
                color:'green',
                opacity: 0.5
              }
            }
          }
        }
        function makeBeacon(x,y,id) {
          var phy;
          if (id == 'beacon 1') 
            // Physical connection to outside of simulation (another JAM node)
            phy={type:'physical',
                ip:'*',
                to:model.parameter.ip1+':'+model.parameter.ipport1,
                proto:'udp'};

          return {
            id:id,
            x:x,
            y:y,
            ports: {
              wlan : {
                type:'multicast',
                status: function (nodes) {
                  // Filter out nodes, e.g., beacons only?
                  return nodes;
                },
                visual: {
                  shape:'circle',
                  width: 80,
                  height: 80,
                  line: {
                    color: 'grey'
                  }
                }
              },
              phy:phy
            },
            visual : {
              shape:'triangle',
              width:50,
              height:50,
              fill: {
                color:'yellow',
                opacity: 0.5
              }
            }
          }
        }
        function makeWorld(x,y) {
          return {
            id:'world',
            x:x,
            y:y,
            visual : {
              shape:'icon',
              icon:'world',
              label:{
                text:'World',
                fontSize:20
              },
              width:50,
              height:50,
              fill: {
                color:'black',
                opacity: 0.5
              },
              line:{
                width:1,
              }
            }
          }
        }
        function onstreet() {
          // 1. Select one street segment x,y,w,h,
          var x,y,s=Math.random(),r;
          if (s < 0.3) r=[10,10,1000,100];
          else if (s < 0.6) r=[450,110,100,500];
          else r=[10,610,1000,100];
          // 2. Select x/y position in segment
          x=r[0]+Math.random()*r[2];
          y=r[1]+Math.random()*r[3];
          return {x:x,y:y}
        }
        var more=[];
        // Create much more mobile devices on the streets ...
        for(var i=3;i<50;i++) {
          var pos=onstreet();
          more.push(makeNode(pos.x,pos.y,'mobile device '+i))
        }
        // Create much more beacons on the streets ...
        for(var i=5;i<15;i++) {
          var pos=onstreet();
          more.push(makeBeacon(pos.x,pos.y,'beacon '+i))
        }
        return [
          makeWorld(600,500),
          makeNode(50,50,'mobile device 1'),
          makeNode(70,140,'mobile device 2'),
          makeBeacon(120,140,'beacon 1'),
          makeBeacon(600,270,'beacon 2'),
          makeBeacon(410,370,'beacon 3'),
          makeBeacon(300,210,'beacon 4'),
        ].concat(more);
    },  
    // Auxiliary passive resources (buildings, streets)
    resources: function () {
      // Streets
      function makeArea(id,x,y,w,h,color) {
        return {
          id:id,
          visual: {
            shape:'rect',
            x:x,
            y:y,
            width:w,
            height:h,
            fill: {
              color: 'grey',
              opacity:0.1,
            },
            line: {
              color: color||'blue',
              width:2
            }
          }
        };
      }
      return [
        makeArea('Street 1',10,10,1000,100),
        makeArea('Street 2',450,110,100,500),
        makeArea('Street 3',10,610,1000,100),  
        makeArea('Building 1',300,210,100,100,'red'),
        makeArea('Building 2',600,270,100,100,'red'),     
        makeArea('Building 3',310,370,100,100,'red'),     
        makeArea('Building 4',50,120,100,100,'red'),     
      ]
    },
  }
}