Hexbin experiments

_.md

[ Launch: Hexbin experiments ] 5574274 by biovisualize

config.json

{"editor_editor":{"coffee":false,"vim":false,"emacs":false,"width":600,"height":300,"hide":false},"description":"Hexbin experiments","endpoint":"","display":"svg","public":true,"require":[{"name":"hexbin","url":"http://d3js.org/d3.hexbin.v0.min.js?5c6e4f0"}],"fileconfigs":{"_.md":{"default":true,"vim":false,"emacs":false,"fontSize":12},"config.json":{"default":true,"vim":false,"emacs":false,"fontSize":12},"inlet.js":{"default":true,"vim":false,"emacs":false,"fontSize":12},"inlet.svg":{"default":true,"vim":false,"emacs":false,"fontSize":12},"style.css":{"default":true,"vim":false,"emacs":false,"fontSize":12}},"fullscreen":false,"play":false,"loop":false,"restart":false,"autoinit":true,"pause":true,"loop_type":"period","bv":false,"nclones":15,"clone_opacity":0.4,"duration":3000,"ease":"linear","dt":0.01}

inlet.js

//Change these values
var hexRadius = 9;
var radiusOffset = -1.324;


var margin = {top: 20, right: 20, bottom: 30, left: 40},
    width = 800 - margin.left - margin.right,
    height = 500 - margin.top - margin.bottom;

var dx = (hexRadius * 2 * Math.sin(Math.PI / 3));
var dy = hexRadius * 1.5
var points = [];
var colNum = ~~(width / hexRadius)-1;
var rowNum = ~~(height / hexRadius)-5;
for (var i = 0; i < rowNum; i++) {
    for (var j = 0; j < colNum; j++) {
        var offset = (i%2 === 0)? 0 : -dx/2;
        points.push([dx * j + offset, dy * i]);
    }
}

var hexbin = d3.hexbin()
    .size([width, height])
    .radius(hexRadius-radiusOffset);

var x = d3.scale.identity()
    .domain([0, width]);

var y = d3.scale.linear()
    .domain([0, height])
    .range([height, 0]);

var xAxis = d3.svg.axis()
    .scale(x)
    .orient("bottom")
    .tickSize(6, -height);

var yAxis = d3.svg.axis()
    .scale(y)
    .orient("left")
    .tickSize(6, -width);

var svg = d3.select("svg")

svg.attr("width", width + margin.left + margin.right)
    .attr("height", height + margin.top + margin.bottom)
  .append("g")
    .attr("transform", "translate(" + margin.left + "," + margin.top + ")");

svg.append("clipPath")
    .attr("id", "clip")
  .append("rect")
    .attr("class", "mesh")
    .attr("width", width)
    .attr("height", height);

var clippedGroup = svg.append("g")
    .attr("clip-path", "url(#clip)");
clippedGroup.selectAll(".hexagon")
    .data(hexbin(points))
  .enter().append("path")
    .attr("class", "hexagon")
    .attr("d", hexbin.hexagon())
    .attr("transform", function(d) { return "translate(" + d.x + "," + d.y + ")"; })
    .style("stroke", function(d) { return 'red' ; });

clippedGroup.selectAll('circle')
  .data(points)
  .enter().append('circle')
  .attr({
      cx: function(d, i){return d[0];},
      cy: function(d, i){return d[1];},
      r: 2
    });    

svg.append("g")
    .attr("class", "y axis")
    .call(yAxis);

svg.append("g")
    .attr("class", "x axis")
    .attr("transform", "translate(0," + height + ")")
    .call(xAxis);

style.css

.axis text {
  font: 10px sans-serif;
}

.axis path,
.axis line {
  fill: none;
  stroke: #000;
  shape-rendering: crispEdges;
}

.hexagon {
  fill: orange;
  stroke: #000;
  stroke-width: 1px;
}

circle{
  fill: green;
}