Published
Edited
Feb 14, 2021
9 forks
49 stars
md`# Elijah Meeks - Particle Sankey
Ported from: https://bl.ocks.org/emeeks/e9d64d27f286e61493c9`
{yield html `
<div id = 'container'>
<svg id = "svgCont" width="1000" height="500"></svg>
<canvas id = "canvasCont" width="1000" height="500"></canvas>
</div>
`
drawChart()}
drawChart = function(){
var svg = d3.select("svg")
.attr("width", width)
.attr("height", height);
var sankey = d3.sankey()
.nodeWidth(15)
.nodePadding(10)
.size([width, height]);
var formatNumber = d3.format(",.0f"),
format = function(d) { return formatNumber(d) + " TWh"; }
var path = sankey.link();
var freqCounter = 1;
energy.links.forEach(function(d){
d.o_value = d.value;
d.value = 1;
})
energy.nodes.forEach(function(d,i){
d.color = colors[i%colors.length]
})
sankey
.nodes(energy.nodes)
.links(energy.links)
.layout(32);
var link = svg.append("g").selectAll(".link")
.data(energy.links)
.enter().append("path")
.attr("class", "link")
.attr("d", path)
.style("stroke-width", function(d){
return Math.max(1, d.dy);
})
.sort(function(a,b) {return b.dy - a.dy});
link.append("title")
.text(function(d) {return d.source.name + " -> " + d.target.name + "\n" + format(d.o_value);});
var node = svg.append("g").selectAll(".node")
.data(energy.nodes)
.enter().append("g")
.attr("class", "node")
.attr("transform", function(d){ return "translate(" + d.x + ", " + d.y + ")";})
.call(d3.drag()
.on("drag", function (event,d){
d.x = event.x
d.y = event.y
d3.select(this).attr("transform", d => `translate(${d.x},${d.y})`);
sankey.relayout();
link.attr("d",path);}
));
node.append("rect")
.attr("height", function(d) {return d.dy;})
.attr("width", sankey.nodeWidth())
.style("fill", function(d,i) {return d.color})
.style("rx", 5)
.style("stroke", "none");
var linkExtent = d3.extent(energy.links, function(d) {return d.o_value});
var frequencyScale = d3.scaleLinear().domain(linkExtent).range([0.05, 1]);
var particleSize = d3.scaleLinear().domain(linkExtent).range([1,5]);
energy.links.forEach(function(link) {
link.freq = frequencyScale(link.o_value);
link.particleSize = 2;
link.particleColor = d3.scaleLinear().domain([0,1])
.range([link.source.color, link.target.color])
});
var particles = [];
function tick(elapsed, time) {
//Remove complete particles
particles = particles.filter(function(d) {return d.current < d.path.getTotalLength()});
function particleEdgeCanvasPath(elapsed) {
var context = d3.select("canvas").node().getContext("2d")
context.clearRect(0,0,width,height);
context.fillStyle = "gray";
context.lineWidth = "1px";
for (var x in particles) {
//Particle Progress: difference between current time, and time of creation
var currentTime = elapsed - particles[x].time;
//Progress Adjusted for speed?
particles[x].current = currentTime * 0.15 * particles[x].speed
var currentPos = particles[x].path.getPointAtLength(particles[x].current);
context.beginPath();
context.fillStyle = particles[x].link.particleColor(0);
context.arc(currentPos.x, currentPos.y + particles[x].offset, particles[x].link.particleSize, 0, 2*Math.PI);
context.fill();
}
};
//Generate particle data
d3.selectAll("path.link")
.each(function(d) {
for (var x=0; x<2; x++) {
//Y jitter
var offset = (Math.random() - .5) * (d.dy - 4);
//Generate particles based on frequency distribution
if (Math.random() < d.freq) {
var length = this.getTotalLength();
particles.push({link: d, time: elapsed, offset: offset, path: this, length: length, animateTime: length, speed: 0.5 + (Math.random())})
}
}
})
particleEdgeCanvasPath(elapsed)
};
var t = d3.timer(tick, 1000);
}
energy.links
margin = ({top: 1, right: 1, bottom: 6, left: 1})
width = 960 - margin.left - margin.right
height = 500 - margin.top - margin.bottom
colors = [
"#01ffff",
"#f6a7ab",
"#0b2934",
"#fcba74",
"#49d811",
"#ff0000",
"#cea9cf",
"#0137d0",
"#008fe1",
"#330120",
"#00dce6",
"#7e0050",
"#f98b10",
"#9c1bad",
"#ae1daf"
]
energy = ({"nodes":[
{"name":"Agricultural 'waste'"},
{"name":"Bio-conversion"},
{"name":"Liquid"},
{"name":"Losses"},
{"name":"Solid"},
{"name":"Gas"},
{"name":"Biofuel imports"},
{"name":"Biomass imports"},
{"name":"Coal imports"},
{"name":"Coal"},
{"name":"Coal reserves"},
{"name":"District heating"},
{"name":"Industry"},
{"name":"Heating and cooling - commercial"},
{"name":"Heating and cooling - homes"},
{"name":"Electricity grid"},
{"name":"Over generation / exports"},
{"name":"H2 conversion"},
{"name":"Road transport"},
{"name":"Agriculture"},
{"name":"Rail transport"},
{"name":"Lighting & appliances - commercial"},
{"name":"Lighting & appliances - homes"},
{"name":"Gas imports"},
{"name":"Ngas"},
{"name":"Gas reserves"},
{"name":"Thermal generation"},
{"name":"Geothermal"},
{"name":"H2"},
{"name":"Hydro"},
{"name":"International shipping"},
{"name":"Domestic aviation"},
{"name":"International aviation"},
{"name":"National navigation"},
{"name":"Marine algae"},
{"name":"Nuclear"},
{"name":"Oil imports"},
{"name":"Oil"},
{"name":"Oil reserves"},
{"name":"Other waste"},
{"name":"Pumped heat"},
{"name":"Solar PV"},
{"name":"Solar Thermal"},
{"name":"Solar"},
{"name":"Tidal"},
{"name":"UK land based bioenergy"},
{"name":"Wave"},
{"name":"Wind"}
],
"links":[
{"source":0,"target":1,"value":124.729},
{"source":1,"target":2,"value":0.597},
{"source":1,"target":3,"value":26.862},
{"source":1,"target":4,"value":280.322},
{"source":1,"target":5,"value":81.144},
{"source":6,"target":2,"value":35},
{"source":7,"target":4,"value":35},
{"source":8,"target":9,"value":11.606},
{"source":10,"target":9,"value":63.965},
{"source":9,"target":4,"value":75.571},
{"source":11,"target":12,"value":10.639},
{"source":11,"target":13,"value":22.505},
{"source":11,"target":14,"value":46.184},
{"source":15,"target":16,"value":104.453},
{"source":15,"target":14,"value":113.726},
{"source":15,"target":17,"value":27.14},
{"source":15,"target":12,"value":342.165},
{"source":15,"target":18,"value":37.797},
{"source":15,"target":19,"value":4.412},
{"source":15,"target":13,"value":40.858},
{"source":15,"target":3,"value":56.691},
{"source":15,"target":20,"value":7.863},
{"source":15,"target":21,"value":90.008},
{"source":15,"target":22,"value":93.494},
{"source":23,"target":24,"value":40.719},
{"source":25,"target":24,"value":82.233},
{"source":5,"target":13,"value":0.129},
{"source":5,"target":3,"value":1.401},
{"source":5,"target":26,"value":151.891},
{"source":5,"target":19,"value":2.096},
{"source":5,"target":12,"value":48.58},
{"source":27,"target":15,"value":7.013},
{"source":17,"target":28,"value":20.897},
{"source":17,"target":3,"value":6.242},
{"source":28,"target":18,"value":20.897},
{"source":29,"target":15,"value":6.995},
{"source":2,"target":12,"value":121.066},
{"source":2,"target":30,"value":128.69},
{"source":2,"target":18,"value":135.835},
{"source":2,"target":31,"value":14.458},
{"source":2,"target":32,"value":206.267},
{"source":2,"target":19,"value":3.64},
{"source":2,"target":33,"value":33.218},
{"source":2,"target":20,"value":4.413},
{"source":34,"target":1,"value":4.375},
{"source":24,"target":5,"value":122.952},
{"source":35,"target":26,"value":839.978},
{"source":36,"target":37,"value":504.287},
{"source":38,"target":37,"value":107.703},
{"source":37,"target":2,"value":611.99},
{"source":39,"target":4,"value":56.587},
{"source":39,"target":1,"value":77.81},
{"source":40,"target":14,"value":193.026},
{"source":40,"target":13,"value":70.672},
{"source":41,"target":15,"value":59.901},
{"source":42,"target":14,"value":19.263},
{"source":43,"target":42,"value":19.263},
{"source":43,"target":41,"value":59.901},
{"source":4,"target":19,"value":0.882},
{"source":4,"target":26,"value":400.12},
{"source":4,"target":12,"value":46.477},
{"source":26,"target":15,"value":525.531},
{"source":26,"target":3,"value":787.129},
{"source":26,"target":11,"value":79.329},
{"source":44,"target":15,"value":9.452},
{"source":45,"target":1,"value":182.01},
{"source":46,"target":15,"value":19.013},
{"source":47,"target":15,"value":289.366}
]})
html`
<style>
#container {
position: relative;
}
#svgCont {
position: absolute;
}
.node rect {
cursor: move;
fill-opacity: .9;
shape-rendering: crispEdges;
}
.node text {
pointer-events: none;
text-shadow: 0 1px 0 #fff;
}
.link {
fill: none;
stroke: #000;
stroke-opacity: .15;
}
.link:hover {
stroke-opacity: .25;
}
</style>
`
d3 = require("d3@6", "d3-sankey@0.1")
One platform to build and deploy the best data apps
Experiment and prototype by building visualizations in live JavaScript notebooks. Collaborate with your team and decide which concepts to build out.
Use Observable Framework to build data apps locally. Use data loaders to build in any language or library, including Python, SQL, and R.
Seamlessly deploy to Observable. Test before you ship, use automatic deploy-on-commit, and ensure your projects are always up-to-date.