georules/README.md

## README.md

      
    Raw
  

              README.md
            
          
    Inspired by @NadiehBremer's Exploring the Art hidden in Pi, implemented in canvas.
Built with blockbuilder.org
forked from sxywu's block: Art in Pi, Experiment #1
forked from sxywu's block: Art in Pi, Experiment #2

  
## index.html
<!DOCTYPE html>
<head>
  <meta charset="utf-8">
  <script src="https://cdnjs.cloudflare.com/ajax/libs/d3/3.5.5/d3.min.js"></script>
  <script src="http://underscorejs.org/underscore-min.js"></script>
  <style>
    body { margin:0;position:fixed;top:0;right:0;bottom:0;left:0; }
    svg { width: 100%; height: 100%; }
  </style>
</head>

<body>
  <canvas id='canvas'></canvas>
  <script>
    var piString = "3.141592653589793238462643383279502884197169399375105820974944592307816406286208998628034825342117067982148086513282306647093844609550582231725359408128481";
    var width = 800;
    var height = 800;
    var length = 35;
    // colors taken from visualcinnamon's original pi art post
    var colors = ['#F3C844', '#F1B34B', '#EC6959', '#DD406E', '#C24488',
                  '#A562A7', '#7B7EBF', '#4EA1B0', '#50BE8D', '#9ECA7D'];

    var canvas = document.getElementById('canvas');
    canvas.width = width;
    canvas.height = height;
    var ctx = canvas.getContext('2d');

    var x = width / 4;
    var y = height / 3;
    // draw pi
    _.each(piString, function(int) {
      int = parseInt(int);
      if (_.isNaN(int)) return;

      ctx.beginPath();
      ctx.moveTo(x, y);

      var radian = (2 * Math.PI) / 10 * int - (Math.PI / 2);
      x += length * Math.cos(radian);
      y += length * Math.sin(radian);

      ctx.strokeStyle = colors[int];
      ctx.lineWidth = 2;
      ctx.lineTo(x, y);
      ctx.stroke();
      ctx.closePath();
    });

    x = length * 2;
    y = length * 2;
    // draw legend
    _.each([0, 1, 2, 3, 4, 5, 6, 7, 8, 9], function(int) {
      var radian = (2 * Math.PI) / 10 * int - (Math.PI / 2);
      var x1 = 2 * Math.cos(radian) + x;
      var y1 = 2 * Math.sin(radian) + y;
      var x2 = length * Math.cos(radian) + x;
      var y2 = length * Math.sin(radian) + y;
      var textX = (length + 5) * Math.cos(radian) + x;
      var textY = (length + 5) * Math.sin(radian) + y;

      ctx.beginPath();
      ctx.moveTo(x1, y1);
      ctx.strokeStyle = colors[int];
      ctx.lineWidth = 2;
      ctx.lineTo(x2, y2);
      ctx.stroke();

      // all that making text look nice
      ctx.font = '12px Helvetica';
      ctx.fillStyle = '#666';
      if (int > 0 && int < 5) {
        ctx.textAlign = 'start';
      } else if (int > 5 && int < 10) {
        ctx.textAlign = 'end';
      } else {
        ctx.textAlign = 'center';
      }
      if (int > 2 && int < 8) {
        ctx.textBaseline = 'top';
      } else {
        ctx.textBaseline = 'bottom';
      }
      ctx.fillText(int, textX, textY);
      ctx.closePath();
    });


  </script>
</body>
	<!DOCTYPE html>
	<head>
	<meta charset="utf-8">
	<script src="https://cdnjs.cloudflare.com/ajax/libs/d3/3.5.5/d3.min.js"></script>
	<script src="http://underscorejs.org/underscore-min.js"></script>
	<style>
	body { margin:0;position:fixed;top:0;right:0;bottom:0;left:0; }
	svg { width: 100%; height: 100%; }
	</style>
	</head>

	<body>
	<canvas id='canvas'></canvas>
	<script>
	var piString = "3.141592653589793238462643383279502884197169399375105820974944592307816406286208998628034825342117067982148086513282306647093844609550582231725359408128481";
	var width = 800;
	var height = 800;
	var length = 35;
	// colors taken from visualcinnamon's original pi art post
	var colors = ['#F3C844', '#F1B34B', '#EC6959', '#DD406E', '#C24488',
	'#A562A7', '#7B7EBF', '#4EA1B0', '#50BE8D', '#9ECA7D'];

	var canvas = document.getElementById('canvas');
	canvas.width = width;
	canvas.height = height;
	var ctx = canvas.getContext('2d');

	var x = width / 4;
	var y = height / 3;
	// draw pi
	_.each(piString, function(int) {
	int = parseInt(int);
	if (_.isNaN(int)) return;

	ctx.beginPath();
	ctx.moveTo(x, y);

	var radian = (2 * Math.PI) / 10 * int - (Math.PI / 2);
	x += length * Math.cos(radian);
	y += length * Math.sin(radian);

	ctx.strokeStyle = colors[int];
	ctx.lineWidth = 2;
	ctx.lineTo(x, y);
	ctx.stroke();
	ctx.closePath();
	});

	x = length * 2;
	y = length * 2;
	// draw legend
	_.each([0, 1, 2, 3, 4, 5, 6, 7, 8, 9], function(int) {
	var radian = (2 * Math.PI) / 10 * int - (Math.PI / 2);
	var x1 = 2 * Math.cos(radian) + x;
	var y1 = 2 * Math.sin(radian) + y;
	var x2 = length * Math.cos(radian) + x;
	var y2 = length * Math.sin(radian) + y;
	var textX = (length + 5) * Math.cos(radian) + x;
	var textY = (length + 5) * Math.sin(radian) + y;

	ctx.beginPath();
	ctx.moveTo(x1, y1);
	ctx.strokeStyle = colors[int];
	ctx.lineWidth = 2;
	ctx.lineTo(x2, y2);
	ctx.stroke();

	// all that making text look nice
	ctx.font = '12px Helvetica';
	ctx.fillStyle = '#666';
	if (int > 0 && int < 5) {
	ctx.textAlign = 'start';
	} else if (int > 5 && int < 10) {
	ctx.textAlign = 'end';
	} else {
	ctx.textAlign = 'center';
	}
	if (int > 2 && int < 8) {
	ctx.textBaseline = 'top';
	} else {
	ctx.textBaseline = 'bottom';
	}
	ctx.fillText(int, textX, textY);
	ctx.closePath();
	});



	</script>
	</body>