text: #!/usr/bin/env node
  
  // Simple particle system example with Node and opc.js
  // Specify a layout file on the command line, or use the default (grid32x16z)
  
  var OPC = new require('./opc');
  var model = OPC.loadModel(process.argv[2] || '../layouts/grid32x16.json');
  //var client = new OPC('localhost', 7890);
  var client = new OPC('192.168.1.9', 7890);
  
  function draw() {
  
      var time = 0.009 * new Date().getTime();
      var numParticles = 200;
      var particles = [];
  
      for (var i = 0; i < numParticles; i++) {
          var s = i / numParticles;
  
          var radius = 0.2 + 1.5 * s;
          var theta = time + 0.04 * i;
          var x = radius * Math.cos(theta);
          var y = radius * Math.sin(theta + 10.0 * Math.sin(theta * 0.15));
          var hue = time * 0.01 + s * 0.2;
  
          particles[i] = {
              point: [x, 0, y],
              intensity: 0.2 * s,
              falloff: 60,
              color: OPC.hsv(hue, 0.5, 0.8)
          };
      }
  
      client.mapParticles(particles, model);
  }
  
  setInterval(draw, 10);
  