DNA-string-visualizer/dna.html at master · cadeParade/DNA-string-visualizer · GitHub

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<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <title>DNA</title>
  <script src="https://cdnjs.cloudflare.com/ajax/libs/d3/3.5.3/d3.js"></script>
  <script src="dat.js"></script>
</head>
<body>
  <script>
var margin = {top: 20, right: 20, bottom: 30, left: 40},
    width = 2000 - margin.left - margin.right,
    height = 3000 - margin.top - margin.bottom;

var red = "#E74C3C",
    green = "#1ABC9C",
    blue = "#3498DB",
    black = "#7F8C8D";

var color = {A: green, C: blue, T: red, G: black};

var dirs = {A: "up", C: "down", T: "left", G: "right"};


var sequence = "AATTCCGGACTGATCGTGCA"

var svg = d3.select("body").append("svg")
    .attr("width", width + margin.left + margin.right)
    .attr("height", height + margin.top + margin.bottom)
    .style("background-color", "#2C3E50");

var prevX = 70;
var prevY = height - 10;
var xyChange = 10;


var circs = svg.selectAll()
    .data(dat)
  .enter().append("circle")
    .attr("cy", function(d, i) {
        if(dirs[d] == "up") {
          newY = prevY + xyChange;
          prevY = newY;
          return newY;
        }
        else if(dirs[d] == "down") {
          newY = prevY - xyChange;
          prevY = newY;
          return newY;
        }
        else { return prevY }
      }) // y center pos
    .attr("cx", function(d, i) {
        if (dirs[d] == "right") {
          newX = prevX + xyChange;
          prevX = newX;
          return newX
        }
        else if (dirs[d] == "left") {
          newX = prevX - xyChange;
          prevX = newX;
          return newX
        }
        else { return prevX }
        return i * 8; }) //x center pos
    .attr("r", function(d, i) { return 4; }) // radius
    .style("fill", function(d) { return color[d]});

  </script>
</body>
</html>