kaezarrex/README.md

## README.md

      
    Raw
  

              README.md
            
          
    Auto-centering and auto-scaling topojson data with an inkpen-style drawing animation.

  
## index.html
<!DOCTYPE html>
<head>
<meta charset='utf-8'>
    <style>
    path {
        fill: none;
        stroke: #D7181E;
        stroke-opacity: 0.8;
        stroke-linecap: round;
        stroke-linejoin: round;
    }
    </style>
</head>
<body>
<script src='http://d3js.org/d3.v3.min.js'></script>
<script src='http://d3js.org/topojson.v1.min.js'></script>
<script>

var width = 960;
var height = 500;
var margin = 20;
var pathWidths = [1, 2, 3, 4, 5];

var svg = d3.select('body').append('svg')
    .attr('width', width)
    .attr('height', height);

width = width - 2*margin;
height = height - 2*margin;

d3.json('map.json', function(error, map) {

    var feature = topojson.feature(map, map.objects.collection).features[0];
    var center = d3.geo.centroid(feature);
    var scale  = 150;
    var offset = [width/2, height/2];
    var projection = d3.geo.mercator()
        .scale(scale)
        .center(center)
        .translate(offset);

    var path = d3.geo.path().projection(projection);

    var bounds = path.bounds(feature);
    var hscale = scale * width  / (bounds[1][0] - bounds[0][0]);
    var vscale = scale * height / (bounds[1][1] - bounds[0][1]);
    var scale = (hscale < vscale) ? hscale : vscale;

    projection = d3.geo.mercator()
        .scale(scale)
        .center(center);

    path = d3.geo.path()
        .projection(projection);

    var group = svg.selectAll('g')
        .data(topojson.feature(map, map.objects.collection).features)

    group.enter().append('g')
        .each(function(data) {
            d3.select(this).selectAll('path')
                .data(pathWidths).enter()
            .append('path')
              .attr('d', function() { return path(data); })
              .style('stroke-width', function(d) { return d; })
              .style('stroke-dasharray', '0,10000')
              .transition()
              .delay(function(d, i) { return i * 50 + 500; })
              .duration(5000)
              .ease('linear')
              .style('stroke-dasharray', '2000,10000');
        });
});

</script>
</body>

## map.json

      
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              map.json
            
          
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## thumbnail.png

      
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              thumbnail.png
	<!DOCTYPE html>
	<head>
	<meta charset='utf-8'>
	<style>
	path {
	fill: none;
	stroke: #D7181E;
	stroke-opacity: 0.8;
	stroke-linecap: round;
	stroke-linejoin: round;
	}
	</style>
	</head>
	<body>
	<script src='http://d3js.org/d3.v3.min.js'></script>
	<script src='http://d3js.org/topojson.v1.min.js'></script>
	<script>

	var width = 960;
	var height = 500;
	var margin = 20;
	var pathWidths = [1, 2, 3, 4, 5];

	var svg = d3.select('body').append('svg')
	.attr('width', width)
	.attr('height', height);

	width = width - 2*margin;
	height = height - 2*margin;

	d3.json('map.json', function(error, map) {

	var feature = topojson.feature(map, map.objects.collection).features[0];
	var center = d3.geo.centroid(feature);
	var scale = 150;
	var offset = [width/2, height/2];
	var projection = d3.geo.mercator()
	.scale(scale)
	.center(center)
	.translate(offset);

	var path = d3.geo.path().projection(projection);

	var bounds = path.bounds(feature);
	var hscale = scale * width / (bounds[1][0] - bounds[0][0]);
	var vscale = scale * height / (bounds[1][1] - bounds[0][1]);
	var scale = (hscale < vscale) ? hscale : vscale;

	projection = d3.geo.mercator()
	.scale(scale)
	.center(center);

	path = d3.geo.path()
	.projection(projection);

	var group = svg.selectAll('g')
	.data(topojson.feature(map, map.objects.collection).features)

	group.enter().append('g')
	.each(function(data) {
	d3.select(this).selectAll('path')
	.data(pathWidths).enter()
	.append('path')
	.attr('d', function() { return path(data); })
	.style('stroke-width', function(d) { return d; })
	.style('stroke-dasharray', '0,10000')
	.transition()
	.delay(function(d, i) { return i * 50 + 500; })
	.duration(5000)
	.ease('linear')
	.style('stroke-dasharray', '2000,10000');
	});
	});

	</script>
	</body>