toja/.block

## .block
license: gpl-3.0

## README.md

      
    Raw
  

              README.md
            
          
    4096 RGB-colors mapped to hue and luminace. 16 equal spaced values per axis.
Inspired by Visualizing Algorithms.

  
## index.html
<!DOCTYPE html>
<meta charset="utf-8">
<body>
<script src="//d3js.org/d3.v3.min.js"></script>
<script>

var width = 960,
    height = 500;

// Create raster in the RGB-cube (16 x 16 x 16)
var a = d3.range(0, 255, 16).map(function (r) { return r + 8; })
var colors = cartesianProduct(a, a, a);

var sample = colorSampler(width, height);

var scaleWidth = d3.scale.linear()
    .domain([0, 360])
    .range([0, width]);

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

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

d3.timer(function() {
    for (var i = 0; i < 10; ++i) {
        var s = sample();
        if (!s) return true;
        svg.append("circle")
            .attr("cx", s[0])
            .attr("cy", s[1])
            .attr("r", 0)
            .style("fill", s[2])
        .transition()
            .attr("r", 4);
  }
});

function colorSampler(width, height) {
  var i = 0;
  return function() {
    if (++i > colors.length) return;
    var c = colors[i - 1];
    var rgb = d3.rgb(c[0], c[1], c[2]);
    var hsl = rgb.hsl();
    return [scaleWidth(hsl.h), scaleHeight(hsl.l), rgb.toString()];
  };
}

// http://stackoverflow.com/questions/15298912/javascript-generating-combinations-from-n-arrays-with-m-elements
function cartesianProduct() {
    var r = [], arg = arguments, max = arg.length-1;
    function helper(arr, i) {
        for (var j=0, l=arg[i].length; j<l; j++) {
            var a = arr.slice(0); // clone arr
            a.push(arg[i][j]);
            if (i==max)
                r.push(a);
            else
                helper(a, i+1);
        }
    }
    helper([], 0);
    return r;
}

</script>

## thumbnail.png

      
    Raw
  

              thumbnail.png
	<!DOCTYPE html>
	<meta charset="utf-8">
	<body>
	<script src="//d3js.org/d3.v3.min.js"></script>
	<script>

	var width = 960,
	height = 500;

	// Create raster in the RGB-cube (16 x 16 x 16)
	var a = d3.range(0, 255, 16).map(function (r) { return r + 8; })
	var colors = cartesianProduct(a, a, a);

	var sample = colorSampler(width, height);

	var scaleWidth = d3.scale.linear()
	.domain([0, 360])
	.range([0, width]);

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

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

	d3.timer(function() {
	for (var i = 0; i < 10; ++i) {
	var s = sample();
	if (!s) return true;
	svg.append("circle")
	.attr("cx", s[0])
	.attr("cy", s[1])
	.attr("r", 0)
	.style("fill", s[2])
	.transition()
	.attr("r", 4);
	}
	});

	function colorSampler(width, height) {
	var i = 0;
	return function() {
	if (++i > colors.length) return;
	var c = colors[i - 1];
	var rgb = d3.rgb(c[0], c[1], c[2]);
	var hsl = rgb.hsl();
	return [scaleWidth(hsl.h), scaleHeight(hsl.l), rgb.toString()];
	};
	}

	// http://stackoverflow.com/questions/15298912/javascript-generating-combinations-from-n-arrays-with-m-elements
	function cartesianProduct() {
	var r = [], arg = arguments, max = arg.length-1;
	function helper(arr, i) {
	for (var j=0, l=arg[i].length; j<l; j++) {
	var a = arr.slice(0); // clone arr
	a.push(arg[i][j]);
	if (i==max)
	r.push(a);
	else
	helper(a, i+1);
	}
	}
	helper([], 0);
	return r;
	}

	</script>