EJ Fox & Ian Johnson
streaming data, code, acid, design
Coding With Fire - Crowd Control Color PaletteCMU COVIDcast APICMU COVIDcast API: Map makerMap Maker Dot Density: Cumulative Covid CasesPattern Moire - Line & Circle Grids with ColorschemesPattern Moire - Line & Circle GridsCustom Cluster Force LayoutCMU COVIDcast API: Map maker Bubbles CanvasCMU COVIDcast API: Map maker BubblesCMU COVIDcast API: Map maker Bubbles IICMU COVIDcast API: Map maker TimelapseCoding With Fire: Mind MapGraphene MoiréGraphene Moiré FirebaseGraphene Moiré 3DCoding With Fire: Paths as PointsCoding With Fire: 3D PathsCoding With Fire: NYPD CCRBWhere are votes at risk?Voronoi PurpleAirDeadline Timers 2CMU COVIDcast API: Bubbles ExportEmojisEmoji Treemap Small MultiplesCounties with DatasetteAmerican Community Survey 2018 by CountyRegistered Voters by County 2016-2018Population Change by County 2016-2018: Bubble LinesRegistered Voters by County 2016-2018: Bubble LinesCMU COVIDcast API: Bubbles Dark ModeUS Bubble Choropleth: Travel From CentroidUS Bubble Choropleth: Travel From CentroidCMU COVIDcast API: Bubbles Textures Interactive TimelapseChoropleth with Textures.jsForce Bubble Map with Textures.jsWhere Are Votes Outstanding? (Data Simulation)Where Are Votes Outstanding? Visualization IdeasElectoral College Unit ChartsElectoral College Unit Charts With TextElectoral College Unit Shuffle
Freaky Dot Patterns
num = 5000
height = width
angles = d3.range(10)
viewof angle = Scrubber(angles, { delay: 150 })
numTriangles = 30
chart9 = {
let radians = Math.PI / 180;
let canvas = html`<canvas></canvas>`;
canvas.width = width;
canvas.height = height;
let ctx = canvas.getContext("2d");
// dots.forEach(d => {
// ctx.fillRect(d.x, d.y, 3, 3);
// });
triangles.forEach(t => {
ctx.fillStyle = t.fill;
// ctx.fillRect(t.x, t.y, t.s, t.s);
ctx.beginPath();
ctx.moveTo(t.x, t.y);
ctx.lineTo(t.x + t.s, t.y);
ctx.lineTo(t.x + t.s / 2, t.y + t.s);
ctx.lineTo(t.x, t.y);
ctx.fill();
});
//https://developer.mozilla.org/en-US/docs/Web/API/CanvasRenderingContext2D/rotate
ctx.translate(width / 2, height / 2);
ctx.rotate(angleTriAnim * radians);
ctx.translate(-width / 2, -height / 2);
// ctx.scale(1 / scale3, 1 / scale3);
triangles.forEach(t => {
ctx.fillStyle = t.fill;
// ctx.fillRect(t.x, t.y, t.s, t.s);
ctx.beginPath();
ctx.moveTo(t.x, t.y);
ctx.lineTo(t.x + t.s, t.y);
ctx.lineTo(t.x + t.s / 2, t.y + t.s);
ctx.lineTo(t.x, t.y);
ctx.fill();
});
return canvas;
}
chart10 = {
let radians = Math.PI / 180;
let canvas = html`<canvas></canvas>`;
canvas.width = width;
canvas.height = height;
let ctx = canvas.getContext("2d");
// dots.forEach(d => {
// ctx.fillRect(d.x, d.y, 3, 3);
// });
triangles.forEach(t => {
ctx.fillStyle = t.fill;
// ctx.fillRect(t.x, t.y, t.s, t.s);
ctx.beginPath();
ctx.moveTo(t.x, t.y);
ctx.lineTo(t.x + t.s, t.y);
ctx.lineTo(t.x + t.s / 2, t.y + t.s / 2);
ctx.lineTo(t.x, t.y);
ctx.fill();
});
//https://developer.mozilla.org/en-US/docs/Web/API/CanvasRenderingContext2D/rotate
ctx.translate(width / 2, height / 2);
ctx.rotate(angleTri * radians);
ctx.translate(-width / 2, -height / 2);
// ctx.scale(1 / scale3, 1 / scale3);
triangles.forEach(t => {
ctx.fillStyle = t.fill;
// ctx.fillRect(t.x, t.y, t.s, t.s);
ctx.beginPath();
ctx.moveTo(t.x, t.y);
ctx.lineTo(t.x + t.s, t.y);
ctx.lineTo(t.x + t.s / 2, t.y + t.s / 2);
ctx.lineTo(t.x, t.y);
ctx.fill();
});
return canvas;
}
triangles = {
let xspacing = width / numTriangles;
let yspacing = height / numTriangles;
return d3.range(numTriangles * numTriangles).map(i => {
let xi = i % numTriangles;
let yi = Math.floor(i / numTriangles);
let startColor = yi % 2 ? "seagreen" : "#111";
let endColor = yi % 2 ? "#111" : "seagreen";
return {
x: xi * xspacing,
y: yi * yspacing,
s: xspacing,
fill: "#111" //i % 2 ? startColor : endColor
};
});
}
trianglesGrid = {
let numTriangles = 10;
let lines = [];
// https://observablehq.com/@sinclarius/html5-canvas-triangle-grid
// https://github.com/bit101/grid/blob/master/grid.js
var max = Math.sqrt(width * width + height * height),
cos60 = Math.cos(Math.PI / 3),
sin60 = Math.sin(Math.PI / 3),
cos120 = Math.cos((Math.PI * 2) / 3),
sin120 = Math.sin((Math.PI * 2) / 3);
let y = 0;
let x = 0;
let i = 0;
for (i = x; i <= x + width; i += numTriangles) {
lines.push([{ x: i, y: y }, { x: i + cos60 * max, y: y + sin60 * max }]);
lines.push([{ x: i, y: y }, { x: i + cos120 * max, y: y + sin120 * max }]);
}
let dy = sin60 * numTriangles,
maxX = Math.ceil(width / numTriangles) * numTriangles + x;
for (i = y; i <= y + height; i += dy) {
lines.push([{ x: x, y: i }, { x: x + width, y: i }]);
}
for (i = y + dy * 2; i <= y + height; i += dy * 2) {
if (i > 0) {
lines.push([{ x: x, y: i }, { x: x + cos60 * max, y: i + sin60 * max }]);
}
lines.push([
{ x: maxX, y: i },
{ x: maxX + cos120 * max, y: i + sin120 * max }
]);
}
return lines;
}
scaler = d3
.scaleLinear()
.domain([0, angles.length])
.range([0.92, 0.97])
angles.length * dots.length
color(0)
color = d3.scaleSequential(rndColorScale).domain([0, angles.length])
dots = {
let chance = new Chance(seed);
return d3.range(num).map(i => {
return {
x: chance.floating({ min: 0, max: width }),
y: chance.floating({ min: 0, max: height })
};
});
}
rndColorScale = {
let chance = new Chance(seed);
let scales = ["interpolateBlues", "interpolateRdYlBu"];
let chosenScale = chance.pick(scales);
return d3[chosenScale];
}
Purpose-built for displays of data
Observable is your go-to platform for exploring data and creating expressive data visualizations. Use reactive JavaScript notebooks for prototyping and a collaborative canvas for visual data exploration and dashboard creation.
