Gooey Effect - Line

This example is from my blog on how to Create a Gooey effect during a transition and shows a gooey circle appearing from a bigger stationary circle

The other two examples

You can find even more gooey examples in my follow-up blog More fun data visualizations with the gooey effect

<!DOCTYPE html>
<html>
  <head>
    <meta http-equiv="Content-Type" content="text/html;charset=utf-8"/ >
	<title>Gooey effect - Line</title>

var margin = {top: 30, right: 30, bottom: 30, left: 30};
		width = Math.min(300, $(".chart").width() - margin.left - margin.right);

var w = window,
		d = document,
		e = d.documentElement,
		g = d.getElementsByTagName('body')[0],
		height = (w.innerHeight || e.clientHeight || g.clientHeight) - margin.top - margin.bottom - 20;
		
	//Create scale
	var xScale = d3.scale.linear()
		.domain([0, 1])
		.range([0, width]);
	
	//Create SVG
	var svg = d3.select(".chart").append("svg")
		.attr("width", width + margin.left + margin.right)
		.attr("height", height + margin.top + margin.bottom)
	  .append("g")
		.style("filter", "url(#gooey)") //Set the filter on the container svg
		.attr("transform", "translate(" + (margin.left) + "," +(height/2 + margin.top) + ")");

//SVG filter for the gooey effect
	//Code taken from https://tympanus.net/codrops/2015/03/10/creative-gooey-effects/
	var defs = svg.append('defs');
	var filter = defs.append('filter').attr('id','gooey');
	filter.append('feGaussianBlur')
		.attr('in','SourceGraphic')
		.attr('stdDeviation','10')
		.attr('result','blur');
	filter.append('feColorMatrix')
		.attr('in','blur')
		.attr('mode','matrix')
		.attr('values','1 0 0 0 0  0 1 0 0 0  0 0 1 0 0  0 0 0 18 -7')
		.attr('result','gooey');
	filter.append('feBlend')
		.attr('in','SourceGraphic')
		.attr('in2','gooey');	
	
	//Append circle at center
	svg.append("circle")
			.attr("class", "centerCircle")
			.attr("cx", 0)
			.attr("cy", 0)
			.attr("r", 20)
			.style("fill", "#81BC00");
	
	//Create a circle that will move out of the center circle
	svg.append("circle")
			.attr("class", "flyCircle")
			.attr("cx", 0)
			.attr("cy", 0)
			.attr("r", 15)
			.style("fill", "#81BC00")
			.each(update);

//Continuously keep the circle flying out
	function update() {
			var circle = d3.selectAll(".flyCircle");
				
			(function repeat() {
				circle
					.attr("cx", 0)
					.attr("r", 15)
					.transition().duration(1500)
						.attr("cx", xScale(Math.random()))
					.transition().duration(1000)
						.attr("r", 0)
					.each("end", repeat);			
			})();
	}//update
	
	</script>
  </body>
</html>

Modified http://d3js.org/d3.v3.min.js to a secure url

Modified http://ajax.googleapis.com/ajax/libs/jquery/1.11.1/jquery.min.js to a secure url

https://d3js.org/d3.v3.min.js

https://ajax.googleapis.com/ajax/libs/jquery/1.11.1/jquery.min.js

https://maxcdn.bootstrapcdn.com/bootstrap/3.3.2/js/bootstrap.min.js