bvancil/README.md

## README.md

      
    Raw
  

              README.md
            
          
    hello world

forked from mbostock's block: OMG Particles!

  
## readme.md

      
    Raw
  

              readme.md
            
          
    Mouseover to make particles. Built with D3. I’ve written a slight newer version that creates particles continuously via d3.timer rather than on mouseover. So, check that out.

  
## index.html
<!DOCTYPE html>
<meta charset="utf-8">
<style>

body {
  margin: 0;
  background: #222;
  min-width: 960px;
}

rect {
  fill: none;
  pointer-events: all;
}

circle {
  fill: none;
  stroke-width: 2.5px;
}

</style>
<body>
<script src="https://cdnjs.cloudflare.com/ajax/libs/d3/3.5.5/d3.min.js"></script>
<script>

var width = Math.max(960, innerWidth),
    height = Math.max(500, innerHeight);

var i = 0;

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

svg.append("rect")
    .attr("width", width)
    .attr("height", height)
    .on("ontouchstart" in document ? "touchmove" : "mousemove", particle);

function particle() {
  var m = d3.mouse(this);

  svg.insert("circle", "rect")
      .attr("cx", m[0])
      .attr("cy", m[1])
      .attr("r", 1e-6)
      .style("stroke", d3.hsl((i = (i + 1) % 360), 1, .5))
      .style("stroke-opacity", 1)
    .transition()
      .duration(2000)
      .ease(Math.sqrt)
      .attr("r", 100)
      .style("stroke-opacity", 1e-6)
      .remove();

  d3.event.preventDefault();
}

</script>
	<!DOCTYPE html>
	<meta charset="utf-8">
	<style>

	body {
	margin: 0;
	background: #222;
	min-width: 960px;
	}

	rect {
	fill: none;
	pointer-events: all;
	}

	circle {
	fill: none;
	stroke-width: 2.5px;
	}

	</style>
	<body>
	<script src="https://cdnjs.cloudflare.com/ajax/libs/d3/3.5.5/d3.min.js"></script>
	<script>

	var width = Math.max(960, innerWidth),
	height = Math.max(500, innerHeight);

	var i = 0;

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

	svg.append("rect")
	.attr("width", width)
	.attr("height", height)
	.on("ontouchstart" in document ? "touchmove" : "mousemove", particle);

	function particle() {
	var m = d3.mouse(this);

	svg.insert("circle", "rect")
	.attr("cx", m[0])
	.attr("cy", m[1])
	.attr("r", 1e-6)
	.style("stroke", d3.hsl((i = (i + 1) % 360), 1, .5))
	.style("stroke-opacity", 1)
	.transition()
	.duration(2000)
	.ease(Math.sqrt)
	.attr("r", 100)
	.style("stroke-opacity", 1e-6)
	.remove();

	d3.event.preventDefault();
	}

	</script>