jasondavies/README.md

## readme.json

      
Display the source blob

    
Display the rendered blob

    
    Raw
  

              readme.json
            
          
      Loading

      Sorry, something went wrong. Reload?
      Sorry, we cannot display this file.
      Sorry, this file is invalid so it cannot be displayed.
      
          Viewer requires iframe.
      
    
## README.md

      
    Raw
  

              README.md
            
          
    This example demonstrates D3’s support for azimuthal projections and clipping to great circles! Release 2.3.0 also includes support for Gnomonic, Bonne, Werner and Sinusoidal projections, as well as for rendering great arcs.

  
## index.html
<!DOCTYPE html>
<meta charset="utf-8">
<style>

circle,
path {
  fill: none;
  stroke: #000;
}

circle {
  stroke-width: 2px;
}

</style>
<body>
<script src="http://d3js.org/d3.v2.min.js"></script>
<script src="https://raw.github.com/d3/d3-plugins/clip/geo/clip/clip.js"></script>
<script>

var width = 960,
    height = 500,
    radius = 240;

var origin = [-71, 42],
    velocity = [.010, -.002],
    t0 = Date.now();

var projection = d3.geo.azimuthal()
    .mode("orthographic")
    .scale(radius)
    .translate([width / 2, height / 2]);

var clip = d3.geo.clip();

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

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

d3.json("readme.json", function(err, geometry) {
  var feature = svg.append("path")
      .datum(geometry)
      .attr("d", draw);

  d3.timer(function() {
    var t = Date.now() - t0,
        o = [origin[0] + velocity[0] * t, origin[1] + velocity[1] * t];
    projection.origin(o);
    clip.origin(o);
    feature.attr("d", draw);
  });

  function draw(d) {
    return path(clip(d));
  }
});

</script>
	<!DOCTYPE html>
	<meta charset="utf-8">
	<style>

	circle,
	path {
	fill: none;
	stroke: #000;
	}

	circle {
	stroke-width: 2px;
	}

	</style>
	<body>
	<script src="http://d3js.org/d3.v2.min.js"></script>
	<script src="https://raw.github.com/d3/d3-plugins/clip/geo/clip/clip.js"></script>
	<script>

	var width = 960,
	height = 500,
	radius = 240;

	var origin = [-71, 42],
	velocity = [.010, -.002],
	t0 = Date.now();

	var projection = d3.geo.azimuthal()
	.mode("orthographic")
	.scale(radius)
	.translate([width / 2, height / 2]);

	var clip = d3.geo.clip();

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

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

	d3.json("readme.json", function(err, geometry) {
	var feature = svg.append("path")
	.datum(geometry)
	.attr("d", draw);

	d3.timer(function() {
	var t = Date.now() - t0,
	o = [origin[0] + velocity[0] * t, origin[1] + velocity[1] * t];
	projection.origin(o);
	clip.origin(o);
	feature.attr("d", draw);
	});

	function draw(d) {
	return path(clip(d));
	}
	});

	</script>