IR-Heatmap/index.html at master · OUSmartInfrastructure/IR-Heatmap · GitHub

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<!DOCTYPE html>
<html>
 <head>
   <meta charset="UTF-8">
   <title>d3ReadFileTest</title>
  <!-- <link rel="stylesheet" type="text/css" href="style.css">-->
 </head>
<div>
<script src="https://d3js.org/d3.v4.min.js"></script>
<script src="https://d3js.org/d3-interpolate.v1.min.js"></script>
<script src="https://d3js.org/d3-scale-chromatic.v1.js"></script>


<!-- Internal Style Sheet-->
<style>
html{
  background: url(<!--URL of background image here-->) no-repeat center center fixed;
  -webkit-background-size: cover;
  -moz-background-size: cover;
  -o-background-size: cover;
  background-size: cover;

}
.heatmap{
  margin: auto;
}

svg{
  position: absolute;
  display: block;
  top: 65%;
  left: 45%;
}

</style>

<script>
//Location of data
var file = 'data/pixels.csv';  //This will depend on your setup

//For use with d3.Interpolate must be between 0 and 1
var domainMin = 0;
var domainMax = 1;

var rangeMin = 0;
var rangeMax = 1;

//Height and width of SVG. Should be set to match thenumber of pixels
var H = 64;
var W = 64;

//Pixel (rectangle) size in SVG
var h = 10;
var w = 10;

//Refresh Rate in ms
var refresh = 20;

//Limits of domain and range. TODO Can be calculated dynamically??
var colorDomain = [domainMin,domainMax]
var colorScale = d3.scaleLinear().domain(colorDomain).range([0,1]);


//Grab Data from url
d3.csv(file, function(error, data) {
   data.forEach(function(d) {
    d.y = +d.y;
    d.x = +d.x;
    d.value = +d.value;
   })
//Grab SVG object
  var svg = d3.select(".heatmap")
    .append("svg")
    .attr("width", H*h)
    .attr("height", W*w)
    .attr("id","test");

  var rectangles = svg.selectAll("rect")
    .data(data)
    .enter()
    .append("rect");

  rectangles
    .attr("x", function(d){
      return d.x * w;

  })
    .attr("y", function(d){
      return d.y * h;
  })
    .attr("width", w)
    .attr("height", h)
    .style("fill", function(d){
      return(d3.interpolateRdYlBu(colorScale(1-d.value)));

             //colorScale(d.value);
  });

}); //end of d3.csv call

var inter = setInterval(function(){
    updateData();
}, refresh);


function updateData() {
  d3.csv(file, function(error, data) {
    data.forEach(function(d) {
     d.y = +d.y;
     d.x = +d.x;
     d.value = +d.value;
   });

  var svg = d3.select(".heatmap");
  var rectangles = svg.selectAll("rect")
    .data(data);

  rectangles.style("fill", function(d){
	return(d3.interpolateRdYlBu(colorScale(1-d.value)));
    });
  }); // end of d3.csv
} // end of update data


</script>
</div>
<body>

<div class="heatmap" id="heatmap"></div>

 </body>

</html>