s105501s/.block

## .block
license: mit

## README.md

      
    Raw
  

              README.md
            
          
    forked from adamhurst's block: 3D DNA Helix
forked from anonymous's block: 3D DNA Helix

  
## index.html
<!DOCTYPE html>
<html>
<head lang="en">
    <meta charset="UTF-8">
    <title></title>
</head>
<body>
    <script type="text/javascript" src="https://cdnjs.cloudflare.com/ajax/libs/d3/3.5.5/d3.min.js" charset="utf-8"></script>
    <script type="text/javascript" src="https://cdnjs.cloudflare.com/ajax/libs/underscore.js/1.8.3/underscore-min.js"></script>
    <script type="text/javascript">

        var fills   = ['#00779C', '#00465C', '#54B8B1', '#377874', '#455560', '#7C99AC', '#F5CC49', '#F5CC9C', '#A8353D', '#682126'],
            h       = 150,
            w       = 800,
            numX    = 40,
            numY    = 30,
            speed   = 0.02,
            torsion = 0.2,
            x = d3.scale.linear().range([10, w - 10]),
            y = d3.scale.linear().range([h - 10, 10]),
            z = d3.scale.linear().range([10, 2]);

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

        svg.append("rect")
            .attr("width", w)
            .attr("height", h)
            .attr("fill", "white")
            .on("mousemove", function () { torsion = 0.5 * d3.mouse(this)[0] / w; });

        var container = svg.append("g");

        var counter = 0;
        function generateData() {
            counter++;
            var data = d3.range(numX).map(function (d) {
                var t = d * torsion - speed * counter;
                return [
                    {
                        x: d,
                        y: Math.cos(t),
                        z: Math.sin(t)
                    },
                    {
                        x: d,
                        y: Math.cos(t - Math.PI),
                        z: Math.sin(t - Math.PI)
                    }
                ]
            });

            var flat = _.flatten(data);
            x.domain(d3.extent(flat, function(d){ return d.x }));
            y.domain(d3.extent(flat, function(d){ return d.y }));
            z.domain(d3.extent(flat, function(d){ return d.z }));

            return data
        }

        function draw() {
            var cont = container.selectAll("g").data(generateData());
            cont.exit().remove();

            var enter = cont.enter()
                .append("g")
                .each(function (d, index) {

                    d3.select(this)
                        .selectAll("circle")
                        .data(d)
                        .enter()
                        .append("circle")
                        .attr("fill", "black");

                    d3.select(this).append('line')
                        .attr("stroke", function (d, i) { return fills[index%7] })
                        .attr("stroke-width", 2)
                });

            cont.each(function (d, index) {

                var inverted = (d[0].y < d[1].y) ? 1 : -1;

                d3.select(this)
                    .selectAll("circle")
                    .data(d)
                    .attr("cx", function (d) { return x(d.x) })
                    .attr("cy", function (d) { return y(d.y) })
                    .attr("r",  function (d) { return z(d.z) })
                    .attr("fill-opacity", function (d) { return z(d.z) / 10 })
                    .attr("fill", function (d, i) { return fills[index%7]; });

                d3.select(this)
                    .select('line')
                    .attr("x2", x(d[0].x))
                    .attr("x1", x(d[0].x))
                    .attr("y2", y(d[0].y) - inverted * z(d[0].z))
                    .attr("y1", y(d[1].y) + inverted * z(d[1].z))
                    .attr("opacity", 0.3 * inverted * (d[1].y - d[0].y))
            })
        }

        setInterval(draw, 25);
    </script>
</body>
</html>
	<!DOCTYPE html>
	<html>
	<head lang="en">
	<meta charset="UTF-8">
	<title></title>
	</head>
	<body>
	<script type="text/javascript" src="https://cdnjs.cloudflare.com/ajax/libs/d3/3.5.5/d3.min.js" charset="utf-8"></script>
	<script type="text/javascript" src="https://cdnjs.cloudflare.com/ajax/libs/underscore.js/1.8.3/underscore-min.js"></script>
	<script type="text/javascript">

	var fills = ['#00779C', '#00465C', '#54B8B1', '#377874', '#455560', '#7C99AC', '#F5CC49', '#F5CC9C', '#A8353D', '#682126'],
	h = 150,
	w = 800,
	numX = 40,
	numY = 30,
	speed = 0.02,
	torsion = 0.2,
	x = d3.scale.linear().range([10, w - 10]),
	y = d3.scale.linear().range([h - 10, 10]),
	z = d3.scale.linear().range([10, 2]);

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

	svg.append("rect")
	.attr("width", w)
	.attr("height", h)
	.attr("fill", "white")
	.on("mousemove", function () { torsion = 0.5 * d3.mouse(this)[0] / w; });

	var container = svg.append("g");

	var counter = 0;
	function generateData() {
	counter++;
	var data = d3.range(numX).map(function (d) {
	var t = d * torsion - speed * counter;
	return [
	{
	x: d,
	y: Math.cos(t),
	z: Math.sin(t)
	},
	{
	x: d,
	y: Math.cos(t - Math.PI),
	z: Math.sin(t - Math.PI)
	}
	]
	});

	var flat = _.flatten(data);
	x.domain(d3.extent(flat, function(d){ return d.x }));
	y.domain(d3.extent(flat, function(d){ return d.y }));
	z.domain(d3.extent(flat, function(d){ return d.z }));

	return data
	}

	function draw() {
	var cont = container.selectAll("g").data(generateData());
	cont.exit().remove();

	var enter = cont.enter()
	.append("g")
	.each(function (d, index) {

	d3.select(this)
	.selectAll("circle")
	.data(d)
	.enter()
	.append("circle")
	.attr("fill", "black");

	d3.select(this).append('line')
	.attr("stroke", function (d, i) { return fills[index%7] })
	.attr("stroke-width", 2)
	});

	cont.each(function (d, index) {

	var inverted = (d[0].y < d[1].y) ? 1 : -1;

	d3.select(this)
	.selectAll("circle")
	.data(d)
	.attr("cx", function (d) { return x(d.x) })
	.attr("cy", function (d) { return y(d.y) })
	.attr("r", function (d) { return z(d.z) })
	.attr("fill-opacity", function (d) { return z(d.z) / 10 })
	.attr("fill", function (d, i) { return fills[index%7]; });

	d3.select(this)
	.select('line')
	.attr("x2", x(d[0].x))
	.attr("x1", x(d[0].x))
	.attr("y2", y(d[0].y) - inverted * z(d[0].z))
	.attr("y1", y(d[1].y) + inverted * z(d[1].z))
	.attr("opacity", 0.3 * inverted * (d[1].y - d[0].y))
	})
	}

	setInterval(draw, 25);
	</script>
	</body>
	</html>