Data visualisation design + code.
Interactive data journalist @TheEconomist
Published
Edited
Jan 4, 2022
21 stars
p5InstanceSketch = p5(function (p) {
// Add very slight colour blur behind the 3 lower stars
let pg = p.createGraphics(370, 800);
pg.background("rgb(46,50,43)");
pg.fill("rgba(166,54,62, 0.8)");
pg.ellipse(centre[0], centre[1] + ytop, 30, 30);
pg.fill("rgba(219,186,83, 0.8)");
pg.ellipse(centre[0], centre[1] + y2, 30, 30);
pg.fill("rgba(81,132,123, 0.8)");
pg.ellipse(centre[0], centre[1] + y3, 30, 30);
pg.filter(p.BLUR, 30);
p.draw = function () {
p.delay = 6;
if (p.frameCount % p.delay == 0) {
p.createCanvas(400, 600);
p.fill("rgba(46,50,43,0)");
p.image(pg, 0, 0);
p.stroke("rgb(255,255,255)");
p.strokeWeight(40);
p.fill("rgba(46,50,43,0)");
p.rect(0, 0, centre[0] * 2, 600, 40);
p.stroke("rgb(202,197,169)");
p.strokeWeight(4);
p.rect(30, 30, 310, 540, 10);
// Fill in dashes in the middle
p.strokeWeight(2);
p.stroke("rgb(196,105,79)");
p.fill("rgb(196,105,79)");
for (let i = 0; i < dashes_num; i++) {
// using a phyllotactic distribution to create dashes around the large firework
// https://observablehq.com/@danleesmith/phyllotaxis-studies
const angle = i * golden_angle;
const r = Math.sqrt(i / dashes_num);
const x =
centre[0] +
(draw_radius -
dash_gap_from_circles -
p.random(dash_gap_from_circles)) *
Math.cos(angle) *
r;
const y =
centre[1] +
(draw_radius -
dash_gap_from_circles -
p.random(dash_gap_from_circles)) *
Math.sin(angle) *
r;
let dist_ratio = p.random(0.2);
let [x1, y1] = [
(1 - dist_ratio) * x + dist_ratio * centre[0],
(1 - dist_ratio) * y + dist_ratio * centre[1]
];
p.strokeWeight(p.random(2));
p.line(x, y, x1, y1);
}
for (let i = 0; i < centre_dashes_num; i++) {
let angle = p.random(Math.PI * 2),
centre_dash_radius = p.random(Math.PI * 2);
let x = centre[0] + p.random(centre_dashes_radius) * Math.cos(angle),
y = centre[1] + p.random(centre_dashes_radius) * Math.sin(angle);
p.strokeWeight(p.random(2));
p.line(x, y, centre[0], centre[1]);
}
// Draw circles around the edge
let colour = colour_orig;
let line_ang = Math.PI * 0.004;
let circles_num = (2 * Math.PI * draw_radius) / (circle_radius * 1.3);
for (let i = 0; i < circles_num; i++) {
p.stroke(colour);
p.fill(colour);
let angle = 2 * Math.PI * (i / circles_num),
draw_radius_add = p.random(2),
x = centre[0] + (draw_radius + draw_radius_add) * Math.cos(angle),
xa =
centre[0] +
(draw_radius + draw_radius_add - circle_radius / 2) *
Math.cos(angle - line_ang),
xb =
centre[0] +
(draw_radius + draw_radius_add - circle_radius / 2) *
Math.cos(angle + line_ang),
x1 =
centre[0] +
(draw_radius + draw_radius_add - line_distanceIn) * Math.cos(angle),
y = centre[1] + (draw_radius + draw_radius_add) * Math.sin(angle),
ya =
centre[1] +
(draw_radius + draw_radius_add - circle_radius / 2) *
Math.sin(angle - line_ang),
yb =
centre[1] +
(draw_radius + draw_radius_add - circle_radius / 2) *
Math.sin(angle + line_ang),
y1 =
centre[1] +
(draw_radius + draw_radius_add - line_distanceIn) * Math.sin(angle);
p.strokeWeight(1);
p.circle(x, y, circle_radius);
// draw line tales from the circles
p.strokeWeight(2);
p.line(xa, ya, x1, y1);
p.line(xb, yb, x1, y1);
}
function drawStarBelow(colour, y_pos) {
p.stroke(colour);
for (let i = 0; i < 40; i++) {
let angle = p.random(Math.PI * 2),
centre_dash_radius = p.random(15, 22);
let x = centre[0] + centre_dash_radius * Math.cos(angle),
y = centre[1] + y_pos + centre_dash_radius * Math.sin(angle);
p.strokeWeight(p.random(2));
p.line(x, y, centre[0], centre[1] + y_pos);
for (let i = 0; i <= 1; i++) {
angle = p.random(Math.PI * 2);
p.strokeWeight(p.random(1, 1.5));
centre_dash_radius = p.random(8, 15);
(x = centre[0] + centre_dash_radius * Math.cos(angle)),
(y = centre[1] + y_pos + centre_dash_radius * Math.sin(angle));
p.line(x, y, centre[0], centre[1] + y_pos);
}
}
}
drawStarBelow("rgb(166,54,62)", ytop);
drawStarBelow("rgb(219,186,83)", y2);
drawStarBelow("rgb(81,132,123)", y3);
}
};
})
{
image_composite.appendChild(p5InstanceSketch);
}
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