curlup/index.html

## index.html
<!DOCTYPE html>
<html>
  <head>
    <meta http-equiv="Content-Type" content="text/html;charset=utf-8"/>
    <script type="text/javascript" src="http://mbostock.github.io/d3/talk/20111018/d3/d3.js"></script>
    <script type="text/javascript" src="http://mbostock.github.io/d3/talk/20111018/d3/d3.geom.js"></script>
    <script type="text/javascript" src="http://mbostock.github.io/d3/talk/20111018/d3/d3.layout.js"></script>
    <style type="text/css">

circle {
  stroke: #000;
  stroke-opacity: .5;
}

.hint {
  color: #222;
  font-size: 18px;
}

.header{
  font-size: 2em;
  position: absolute;
}

.footer{
  font-size: 3em;
  position: absolute;
  top: 660px;
  left: 760px;
}

.hidden {
  display: none;
}

    </style>
    <title>Collision</title>
  </head>
  <body>
    <div id="body">
      <div class="header">
	      <span style="color:red">No</span> collision
	       <div class="hint">move the cursor to keep the red node away from the others</div>
      </div>
      <div class="footer">
        your current score is: <span id="score">0</span>
        <br>
        your current record is: <span id="maxscore">0</span>
	<div class="hint">reloading the page resets the record</div>
      </div>
    </div>
    <script type="text/javascript">

var w = 960,
    h = 800;

var nodes = d3.range(202).map(function() { return {radius: Math.random() * 12 + 4}; }),
    color = d3.scale.category10();

var infected = 0;
var infColor = "red", defColor = "black";

var force = d3.layout.force()
    .friction(0.925)
    .gravity(0.1)
    .charge(function(d, i) { return d == root ? -2000 : (i<=infected ? -250*Math.sqrt(d.radius) : 0 ); })
    .nodes(nodes)
    .size([w, h]);

var root = nodes[0];
root.radius = 1;
root.fixed = true;

var theOne = nodes[nodes.length-1];
theOne.radius = 10;

force.start();

var svg = d3.select("#body").append("svg:svg")
    .attr("width", w)
    .attr("height", h);

var score = 0;
var text = d3.select("#score");

var maxscore = 0;
var maxtext = d3.select("#maxscore");
var twitter_widget = d3.select("#twitter-widget-0");

svg.selectAll("circle")
    .data(nodes)
  .enter().append("svg:circle")
    .attr("r", function(d) { return d.radius ; })
    .style("fill", function(d, i) { return (d==theOne || i<=infected) ? infColor: defColor; });

var score_inc = true;
var prev_maxscore = 0;
force.on("tick", function(e) {
  var q = d3.geom.quadtree(nodes),
      i = 0,
      n = nodes.length;

  score_inc = true;
  while (++i < n) {
    q.visit(collide(nodes[i]));
  }

  if (score_inc)
  {score+=0.02;}
  else
  {
    score=0
  };
  maxscore = (maxscore>score?maxscore:score) | 0;
  infected = (score) | 0;
  text.text((score*10|0)/10);
  maxtext.text(maxscore);
  if (prev_maxscore != maxscore && maxscore>2){
    maxtext.append("iframe")
	.attr("class", "twitter-share-button twitter-tweet-button twitter-count-horizontal")
	.attr("src", "https://platform.twitter.com/widgets/tweet_button.1390956745.html#_=1391369095545&amp;count=horizontal&amp;id=twitter-widget-0&amp;lang=en&amp;original_referer=file%3A%2F%2F%2Fhome%2Ftru%2FDesktop%2Fcollision.html&amp;related=tru_pablo&amp;size=m&amp;text=I%20scored%20"+maxscore+"%20in%20Collision%20game&amp;url=file%3A%2F%2F%2Fhome%2Ftru%2FDesktop%2Fcollision.html")
	.attr("id", "twitter-widget-0")
	.attr("scrolling", "no")
	.attr("frameborder", "0")
	.attr("allowtransparency", "true")
	.attr("title", "Twitter Tweet Button")
	.attr("data-twttr-rendered", "true")
	.attr("style", "width: 107px; height: 20px;");
  }
  prev_maxscore = maxscore;


  svg.selectAll("circle")
      .attr("cx", function(d) { return d.x; })
      .attr("cy", function(d) { return d.y; })
      .style("fill", function(d, i) { return (d==theOne || i<=infected) ? infColor: defColor; });

});

svg.on("mousemove", function() {
  force.stop()
  var p1 = d3.svg.mouse(this);
  root.px = p1[0];
  root.py = p1[1];
  force.start();
  force.resume();
});

function collide(node) {
  var r = node.radius + 16,
      nx1 = node.x - r,
      nx2 = node.x + r,
      ny1 = node.y - r,
      ny2 = node.y + r;
  return function(quad, x1, y1, x2, y2) {
    if (quad.point && (quad.point !== node)) {
      var x = node.x - quad.point.x,
          y = node.y - quad.point.y,
          l = Math.sqrt(x * x + y * y),
          r = node.radius + quad.point.radius;
      if (l < r) {
        l = (l - r) / l * .5;
        node.x -= x *= l;
        node.y -= y *= l;
        quad.point.x += x;
        quad.point.y += y;

        if (node == theOne || quad.point == theOne)
        {
          score_inc = false;
        }
      }
    }
    return x1 > nx2
        || x2 < nx1
        || y1 > ny2
        || y2 < ny1;
  };
}

d3.select(self.frameElement).style("height", h + "px");
    </script>
  </body>
</html>
	<!DOCTYPE html>
	<html>
	<head>
	<meta http-equiv="Content-Type" content="text/html;charset=utf-8"/>
	<script type="text/javascript" src="http://mbostock.github.io/d3/talk/20111018/d3/d3.js"></script>
	<script type="text/javascript" src="http://mbostock.github.io/d3/talk/20111018/d3/d3.geom.js"></script>
	<script type="text/javascript" src="http://mbostock.github.io/d3/talk/20111018/d3/d3.layout.js"></script>
	<style type="text/css">

	circle {
	stroke: #000;
	stroke-opacity: .5;
	}

	.hint {
	color: #222;
	font-size: 18px;
	}

	.header{
	font-size: 2em;
	position: absolute;
	}

	.footer{
	font-size: 3em;
	position: absolute;
	top: 660px;
	left: 760px;
	}

	.hidden {
	display: none;
	}

	</style>
	<title>Collision</title>
	</head>
	<body>
	<div id="body">
	<div class="header">
	<span style="color:red">No</span> collision
	<div class="hint">move the cursor to keep the red node away from the others</div>
	</div>
	<div class="footer">
	your current score is: <span id="score">0</span>
	<br>
	your current record is: <span id="maxscore">0</span>
	<div class="hint">reloading the page resets the record</div>
	</div>
	</div>
	<script type="text/javascript">

	var w = 960,
	h = 800;

	var nodes = d3.range(202).map(function() { return {radius: Math.random() * 12 + 4}; }),
	color = d3.scale.category10();

	var infected = 0;
	var infColor = "red", defColor = "black";

	var force = d3.layout.force()
	.friction(0.925)
	.gravity(0.1)
	.charge(function(d, i) { return d == root ? -2000 : (i<=infected ? -250*Math.sqrt(d.radius) : 0 ); })
	.nodes(nodes)
	.size([w, h]);

	var root = nodes[0];
	root.radius = 1;
	root.fixed = true;

	var theOne = nodes[nodes.length-1];
	theOne.radius = 10;

	force.start();

	var svg = d3.select("#body").append("svg:svg")
	.attr("width", w)
	.attr("height", h);

	var score = 0;
	var text = d3.select("#score");

	var maxscore = 0;
	var maxtext = d3.select("#maxscore");
	var twitter_widget = d3.select("#twitter-widget-0");

	svg.selectAll("circle")
	.data(nodes)
	.enter().append("svg:circle")
	.attr("r", function(d) { return d.radius ; })
	.style("fill", function(d, i) { return (d==theOne \|\| i<=infected) ? infColor: defColor; });

	var score_inc = true;
	var prev_maxscore = 0;
	force.on("tick", function(e) {
	var q = d3.geom.quadtree(nodes),
	i = 0,
	n = nodes.length;

	score_inc = true;
	while (++i < n) {
	q.visit(collide(nodes[i]));
	}

	if (score_inc)
	{score+=0.02;}
	else
	{
	score=0
	};
	maxscore = (maxscore>score?maxscore:score) \| 0;
	infected = (score) \| 0;
	text.text((score*10\|0)/10);
	maxtext.text(maxscore);
	if (prev_maxscore != maxscore && maxscore>2){
	maxtext.append("iframe")
	.attr("class", "twitter-share-button twitter-tweet-button twitter-count-horizontal")
	.attr("src", "https://platform.twitter.com/widgets/tweet_button.1390956745.html#_=1391369095545&count=horizontal&id=twitter-widget-0&lang=en&original_referer=file%3A%2F%2F%2Fhome%2Ftru%2FDesktop%2Fcollision.html&related=tru_pablo&size=m&text=I%20scored%20"+maxscore+"%20in%20Collision%20game&url=file%3A%2F%2F%2Fhome%2Ftru%2FDesktop%2Fcollision.html")
	.attr("id", "twitter-widget-0")
	.attr("scrolling", "no")
	.attr("frameborder", "0")
	.attr("allowtransparency", "true")
	.attr("title", "Twitter Tweet Button")
	.attr("data-twttr-rendered", "true")
	.attr("style", "width: 107px; height: 20px;");
	}
	prev_maxscore = maxscore;


	svg.selectAll("circle")
	.attr("cx", function(d) { return d.x; })
	.attr("cy", function(d) { return d.y; })
	.style("fill", function(d, i) { return (d==theOne \|\| i<=infected) ? infColor: defColor; });

	});

	svg.on("mousemove", function() {
	force.stop()
	var p1 = d3.svg.mouse(this);
	root.px = p1[0];
	root.py = p1[1];
	force.start();
	force.resume();
	});

	function collide(node) {
	var r = node.radius + 16,
	nx1 = node.x - r,
	nx2 = node.x + r,
	ny1 = node.y - r,
	ny2 = node.y + r;
	return function(quad, x1, y1, x2, y2) {
	if (quad.point && (quad.point !== node)) {
	var x = node.x - quad.point.x,
	y = node.y - quad.point.y,
	l = Math.sqrt(x * x + y * y),
	r = node.radius + quad.point.radius;
	if (l < r) {
	l = (l - r) / l * .5;
	node.x -= x *= l;
	node.y -= y *= l;
	quad.point.x += x;
	quad.point.y += y;

	if (node == theOne \|\| quad.point == theOne)
	{
	score_inc = false;
	}
	}
	}
	return x1 > nx2
	\|\| x2 < nx1
	\|\| y1 > ny2
	\|\| y2 < ny1;
	};
	}

	d3.select(self.frameElement).style("height", h + "px");
	</script>
	</body>
	</html>