tomshanley/.block

## .block
license: mit

## README.md

      
    Raw
  

              README.md
            
          
    Built with blockbuilder.org

  
## index.html
<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html;charset=utf-8"/>

  <style>
    path {
      stroke-width: 2px;
      fill: none;
    }
  </style>

</head>
<body>

  <p>Click the chart to start the animation.</p>

  <div id="line"></div>
  <script src="https://d3js.org/d3.v4.min.js"></script>
  <script type="text/javascript">

    console.clear()

    var w = 700;
    var h = 300;
    var m = 40;

    var max = 10

    var svg = d3.select("#line")
      .append("svg")
      .attr("width", w + m + m)
      .attr("height", h + m + m)

    var chart = svg.append("g")
    	.attr("transform", "translate(" + m + "," + m + ")")

    var data = d3.range(max+1)
    .map(function(){
      return Math.random() * max
    })

    var x = d3.scaleLinear()
    .domain([0, max])
    .range([0, w]);

    var y = d3.scaleLinear()
    .domain([0, max])
    .range([h, 0]);

    var line = d3.line()
      .x(function(d,i) {return x(i);})
      .y(function(d) {return y(d);})
    	.curve(d3.curveCardinal)

    var clipPath = chart.append("clipPath")
    	.attr("id", "clip")
    	.append("rect")
    	.attr("id", "clip-rect")
    	.attr("width", 0)
    	.attr("height", h)

    var bkdPath = chart.append("path")
      .attr("d", line(data))
      .style("stroke", "lightgrey")

    var path = chart.append("path")
      .attr("d", line(data))
      .style("stroke", "orange")
    	.attr("clip-path", "url(#clip)")

    var bkdCircle = chart.selectAll(".bkd-circle")
      .data(data)
    	.enter()
    	.append("g")
    	.attr("transform", function(d, i){
        return "translate(" + x(i) + "," + y(d) + ")"
      })
    	.attr("class", "bkd-circle")
			.append("circle")
    	.attr("r", 5)
    	.style("stroke", "lightgrey")
    	.style("fill", "white")

    var dataPoint = chart.selectAll('.data-point')
    	.data(data)
    	.enter()
    	.append("g")
    	.attr("transform", function(d, i){
        return "translate(" + x(i) + "," + y(d) + ")"
      })
    	.attr("class", "data-point")
    	.attr("id", (d, i) => "data-point-" + i)
    	.style("opacity", 0)

    dataPoint.append("circle")
    	.attr("r", 5)

    dataPoint.append("text")
    	.text((d, i) => i + ", " + round2dp(d) )
    	.attr("dy", 18)

    let pointArray = []
    let sampleRate = 10
  	let sampleWidth = w / sampleRate
    let currentLength = 0
    let node = path.node()
    let pathLength = node.getTotalLength()

    for (var i = 0; i<sampleRate; i++) {

      console.log(i * sampleWidth)

      for (var j = 0; j<1000; j++){
        let point = node.getPointAtLength(currentLength + j)
        console.log(point)
        if (point.x >= (sampleWidth * i)) {
          console.log("here")
          pointArray.push(point)
          currentLength = point.x
          break
        }
      }
    }

    chart.selectAll(".markers")
    	.data(pointArray)
    	.enter()
    	.append("circle")
    	.attr("cx", d => d.x)
    	.attr("cy", d => d.y)
    	.attr("r", 5)
    	.style("fill", "red")

    console.log(pointArray)

    let head = chart.append("circle")
    	.datum(pointArray)
    	.attr("cx", d => d[0].x)
    	.attr("cy", d => d[0].y)
    	.attr("r", 5)
    	.style("fill", "green")
    	.attr("id", "head")

    /*
    var show = false


    svg.on("click", function(){

    	head.transition()
        .duration(10000)
      	.ease(d3.easeLinear)
        .tween("attr.cx", function() {

          return function(t) {


            }

            })

      d3.select('#clip-rect')
        .transition()
        .duration(10000)
      	.ease(d3.easeLinear)
        .attr("width", function(d){
        	let n = w
        	if (show) {
            show = false
            n = 0
          } else {
            show = true
          }
        	return n
      	})
      	.tween("attr.fill", function() {

          return function(t) {

            let kx = show ?
                Math.floor(t * max) :
            		Math.ceil((1-t) * max)

            let id = "#data-point-" + kx

            d3.selectAll(".data-point")
            	.style("opacity", 0)

            d3.select(id)
            	.style("opacity", 1)
          };

        });
    })

    */

    function round2dp(n) {
      return Number.parseFloat(n).toFixed(2);
    }


  </script>
</body>
</html>
	<!DOCTYPE html>
	<html>
	<head>
	<meta http-equiv="Content-Type" content="text/html;charset=utf-8"/>

	<style>
	path {
	stroke-width: 2px;
	fill: none;
	}
	</style>

	</head>
	<body>

	<p>Click the chart to start the animation.</p>

	<div id="line"></div>
	<script src="https://d3js.org/d3.v4.min.js"></script>
	<script type="text/javascript">

	console.clear()

	var w = 700;
	var h = 300;
	var m = 40;

	var max = 10

	var svg = d3.select("#line")
	.append("svg")
	.attr("width", w + m + m)
	.attr("height", h + m + m)

	var chart = svg.append("g")
	.attr("transform", "translate(" + m + "," + m + ")")

	var data = d3.range(max+1)
	.map(function(){
	return Math.random() * max
	})

	var x = d3.scaleLinear()
	.domain([0, max])
	.range([0, w]);

	var y = d3.scaleLinear()
	.domain([0, max])
	.range([h, 0]);

	var line = d3.line()
	.x(function(d,i) {return x(i);})
	.y(function(d) {return y(d);})
	.curve(d3.curveCardinal)

	var clipPath = chart.append("clipPath")
	.attr("id", "clip")
	.append("rect")
	.attr("id", "clip-rect")
	.attr("width", 0)
	.attr("height", h)

	var bkdPath = chart.append("path")
	.attr("d", line(data))
	.style("stroke", "lightgrey")

	var path = chart.append("path")
	.attr("d", line(data))
	.style("stroke", "orange")
	.attr("clip-path", "url(#clip)")

	var bkdCircle = chart.selectAll(".bkd-circle")
	.data(data)
	.enter()
	.append("g")
	.attr("transform", function(d, i){
	return "translate(" + x(i) + "," + y(d) + ")"
	})
	.attr("class", "bkd-circle")
	.append("circle")
	.attr("r", 5)
	.style("stroke", "lightgrey")
	.style("fill", "white")

	var dataPoint = chart.selectAll('.data-point')
	.data(data)
	.enter()
	.append("g")
	.attr("transform", function(d, i){
	return "translate(" + x(i) + "," + y(d) + ")"
	})
	.attr("class", "data-point")
	.attr("id", (d, i) => "data-point-" + i)
	.style("opacity", 0)

	dataPoint.append("circle")
	.attr("r", 5)

	dataPoint.append("text")
	.text((d, i) => i + ", " + round2dp(d) )
	.attr("dy", 18)

	let pointArray = []
	let sampleRate = 10
	let sampleWidth = w / sampleRate
	let currentLength = 0
	let node = path.node()
	let pathLength = node.getTotalLength()

	for (var i = 0; i<sampleRate; i++) {

	console.log(i * sampleWidth)

	for (var j = 0; j<1000; j++){
	let point = node.getPointAtLength(currentLength + j)
	console.log(point)
	if (point.x >= (sampleWidth * i)) {
	console.log("here")
	pointArray.push(point)
	currentLength = point.x
	break
	}
	}
	}

	chart.selectAll(".markers")
	.data(pointArray)
	.enter()
	.append("circle")
	.attr("cx", d => d.x)
	.attr("cy", d => d.y)
	.attr("r", 5)
	.style("fill", "red")

	console.log(pointArray)

	let head = chart.append("circle")
	.datum(pointArray)
	.attr("cx", d => d[0].x)
	.attr("cy", d => d[0].y)
	.attr("r", 5)
	.style("fill", "green")
	.attr("id", "head")

	/*
	var show = false



	svg.on("click", function(){

	head.transition()
	.duration(10000)
	.ease(d3.easeLinear)
	.tween("attr.cx", function() {

	return function(t) {


	}

	})

	d3.select('#clip-rect')
	.transition()
	.duration(10000)
	.ease(d3.easeLinear)
	.attr("width", function(d){
	let n = w
	if (show) {
	show = false
	n = 0
	} else {
	show = true
	}
	return n
	})
	.tween("attr.fill", function() {

	return function(t) {

	let kx = show ?
	Math.floor(t * max) :
	Math.ceil((1-t) * max)

	let id = "#data-point-" + kx

	d3.selectAll(".data-point")
	.style("opacity", 0)

	d3.select(id)
	.style("opacity", 1)
	};

	});
	})

	*/

	function round2dp(n) {
	return Number.parseFloat(n).toFixed(2);
	}






	</script>
	</body>
	</html>