stoch-ani/example_motion.html at master · elevien/stoch-ani · GitHub

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<!DOCTYPE html>
<html lang="en">

<style>
.line {
  fill: none;
  stroke: steelblue;
  stroke-width: 1.5px;
}

.circle {
  fill: none;
  stroke: steelblue;
  stroke-width: 1.5px;
}
</style>
<head>
	<title>Test</title>
	   <script src="http://d3js.org/d3.v3.min.js" charset="utf-8"></script>
	   <script src="https://d3js.org/d3-timer.v1.min.js"></script>
</head>

<body>
	<!-- Page elements and content go here. -->
	<body>

	<script>
	// SETUP

	var x1 = [2];
	var history = [];
	var dat2 = [10,10,10,10,10,10,10,10,10,10,10];


	var w = 1000;
	var h = 400;
	var drawFlag = true
	var frameRate = 100
	var xMax = d3.max(x1, function(d) { return d;} );

	var svg = d3.select("body")
					.append("svg")
					.attr("width", w)
					.attr("height", h)
					.attr("style", "outline: thin solid black;");

	var points  = svg.selectAll("circle")
		   .data(x1)
		   .enter()
		   .append("circle")
		   .attr("cx", function(d) {return w-20; })
		   .attr("cy", function(d) {return 50.;})
		   .attr("r", 4);


	var lineFunction = d3.svg.line()
		.x(function(d) { return d[0]; })
 		.y(function(d) { return d[1]; })
		.interpolate("linear");

	var path = svg.append("path")
		 .attr("d", lineFunction(history))
		.attr("stroke", "black")
		.attr("stroke-width", 2)
		.attr("fill", "none");

	// ANIMATE
	var anim = d3.interval(function (elapsed) {if (drawFlag) {draw(elapsed);}},frameRate);


	function draw(elapsed) {

		// Take step in simulations
		//x1.forEach(function(d) {
	    //	d = d + Math.floor(Math.random() *h)});


		x1[0]=x1[0] + (Math.random()-0.5)*50 ;
		history.push([w-20,x1[0]+100])
		for(var i=0;i<history.length-1;i++){
			history[i][0]=history[i][0] - 10 ;
		}
		console.log(history)


		// update point data
		points.data(x1);

		// animate step
		points
			.transition()
			.duration(frameRate/5.)
			.ease("linear")
			.attr("cy", function(d) {return d+100;})

		path.transition().duration(frameRate).attr("d", lineFunction(history))


    }

</script>

</body>
</html>