areologist/.block

## .block
license: mit

## README.md

      
    Raw
  

              README.md
            
          
    Built with blockbuilder.org

  
## index.html
<!DOCTYPE html>
<head>
  <meta charset="utf-8">
  <script src="https://d3js.org/d3.v4.min.js"></script>
  <style>
    body { margin:0;position:fixed;top:0;right:0;bottom:0;left:0; }
    svg {
      border: 1px solid blue;
    }
  </style>
</head>

<body>
  <script>
    const svg = d3.select('body')
    	.append('svg')
    	.attr('width', 650)
    	.attr('height', 450);

    const generateData = (n=10) => {
      const d = [];
      const f = () => Math.floor(Math.random() * 10 + 1);
      for (let i = 0; i < n; i++) {
        d.push({
          x: f(),
          y: f(),
          r: f()
        });
      }
      return d;
    };

    let data = generateData(30);

    const scaleX = d3.scaleLinear()
    	.domain([0, 10])
    	.range([50, 550]);

    const scaleY = d3.scaleLinear()
    	.domain([0, 10])
    	.range([50, 350]);

    const scaleR = d3.scaleLinear()
    	.domain([0, 10])
    	.range([10, 100]);

    const scaleC = d3.scaleLinear()
    	.domain([0, 10])
    	.range([0, 1]);

		//const colors = d3.scaleOrdinal(d3.schemeCategory20c);
    const rainbow = d3.scaleSequential(d3.interpolateRainbow);

    svg.selectAll('circle')
    	.data(data)
    	.enter().append('circle')
    	.attr('cx', d => scaleX(d.x))
    	.attr('cy', d => scaleY(d.y))
    	.attr('r', d => scaleR(d.r))
    	.attr('fill', 'none')
    	.attr('stroke-width', 2)
    	.attr('stroke', d => {
      	// colors(d.r);
        return rainbow(scaleC(d.r));
    	});

    // for fun let's modify the data
    const update = () => {
      const delta = 10;
      data = data
        .slice(delta)
      	.concat(generateData(delta));

      const circles = svg.selectAll('circle')
      	.data(data, d => d.radius);

      circles.exit()
      	.attr('opacity', 1)
      	.transition()
      	.attr('r', d => scaleR(d.r) * 2)
      	.attr('opacity', 0)
	      .remove();

      circles.enter().append('circle')
      	.attr('r', 0)
      	.attr('cx', d => scaleX(d.x))
      	.attr('cy', d => scaleY(d.y))
        .attr('fill', 'none')
        .attr('stroke-width', 2)
      	.attr('stroke', d => rainbow(scaleC(d.r)))
      	.attr('opacity', 0.3)
      .transition()
      	.duration(450)
    		.ease(d3.easeLinear)
      	.attr('opacity', 1)
      	.attr('r', d => scaleR(d.r));
    };
    setInterval(update, 1000);
  </script>
</body>
	<!DOCTYPE html>
	<head>
	<meta charset="utf-8">
	<script src="https://d3js.org/d3.v4.min.js"></script>
	<style>
	body { margin:0;position:fixed;top:0;right:0;bottom:0;left:0; }
	svg {
	border: 1px solid blue;
	}
	</style>
	</head>

	<body>
	<script>
	const svg = d3.select('body')
	.append('svg')
	.attr('width', 650)
	.attr('height', 450);

	const generateData = (n=10) => {
	const d = [];
	const f = () => Math.floor(Math.random() * 10 + 1);
	for (let i = 0; i < n; i++) {
	d.push({
	x: f(),
	y: f(),
	r: f()
	});
	}
	return d;
	};

	let data = generateData(30);

	const scaleX = d3.scaleLinear()
	.domain([0, 10])
	.range([50, 550]);

	const scaleY = d3.scaleLinear()
	.domain([0, 10])
	.range([50, 350]);

	const scaleR = d3.scaleLinear()
	.domain([0, 10])
	.range([10, 100]);

	const scaleC = d3.scaleLinear()
	.domain([0, 10])
	.range([0, 1]);

	//const colors = d3.scaleOrdinal(d3.schemeCategory20c);
	const rainbow = d3.scaleSequential(d3.interpolateRainbow);

	svg.selectAll('circle')
	.data(data)
	.enter().append('circle')
	.attr('cx', d => scaleX(d.x))
	.attr('cy', d => scaleY(d.y))
	.attr('r', d => scaleR(d.r))
	.attr('fill', 'none')
	.attr('stroke-width', 2)
	.attr('stroke', d => {
	// colors(d.r);
	return rainbow(scaleC(d.r));
	});

	// for fun let's modify the data
	const update = () => {
	const delta = 10;
	data = data
	.slice(delta)
	.concat(generateData(delta));

	const circles = svg.selectAll('circle')
	.data(data, d => d.radius);

	circles.exit()
	.attr('opacity', 1)
	.transition()
	.attr('r', d => scaleR(d.r) * 2)
	.attr('opacity', 0)
	.remove();

	circles.enter().append('circle')
	.attr('r', 0)
	.attr('cx', d => scaleX(d.x))
	.attr('cy', d => scaleY(d.y))
	.attr('fill', 'none')
	.attr('stroke-width', 2)
	.attr('stroke', d => rainbow(scaleC(d.r)))
	.attr('opacity', 0.3)
	.transition()
	.duration(450)
	.ease(d3.easeLinear)
	.attr('opacity', 1)
	.attr('r', d => scaleR(d.r));
	};
	setInterval(update, 1000);
	</script>
	</body>