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pizza.js
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pizza.js
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const canvasSketch = require('canvas-sketch');
const Random = require('canvas-sketch-util/random');
const { lerpArray } = require('canvas-sketch-util/math');
const settings = {
// dimensions: [1280, 640],
dimensions: [1080, 1080],
scaleToView: true,
animate: true,
fps: 2,
playbackRate: 'throttle',
duration: 12,
};
const clrs = {
base: '#EBE4C4',
crust: '#F09F31',
cheese: '#FFCA3B',
pepperoni: '#ED1F27',
bg: '#FF8664',
outline: '#6C1A4D',
};
const sketch = () => {
return (props) => {
const { width, height, context } = props;
const margin = 2;
const res = [4, 8];
const size = [
(width - 2 * margin) / res[0],
(height - 2 * margin) / res[1],
];
context.clearRect(0, 0, width, height);
context.fillStyle = clrs.bg;
context.fillRect(0, 0, width, height);
context.strokeStyle = clrs.outline;
context.lineWidth = 8;
context.lineJoin = 'round';
context.lineCap = 'round';
makePizza(context, [width / 2, height / 2], [width / 6, width / 8]);
// for (let y = 0; y < res[1]; y++) {
// for (let x = 0; x < res[0]; x++) {
// const pizza = makePizza(
// context,
// [margin + (x + 0.5) * size[0], margin + (y + 0.5) * size[1]],
// [size[0] * 0.25, size[1] * 0.25]
// );
// // paths.push(pizza);
// }
// }
};
};
canvasSketch(sketch, settings);
function makePizza(context, [cx, cy], [a, b]) {
const angles = randomAngles();
const crustAngleOff = Math.PI * 0.01;
const angle1 = angles[1] - crustAngleOff;
const angle2 = angles[2] + crustAngleOff;
const base = angles.map((angle) => pointOnEllipse([cx, cy], angle, a, b));
const droopSide = base[1][1] < base[2][1] ? 2 : 1;
// Draw cheese
context.fillStyle = clrs.cheese;
context.beginPath();
context.moveTo(...base[0]);
context.lineTo(...base[1]);
context.ellipse(cx, cy, a, b, 0, angle1, angle2);
context.closePath();
context.fill();
context.stroke();
// Draw base
context.fillStyle = clrs.base;
context.beginPath();
context.moveTo(...base[0]);
context.lineTo(...base[droopSide]);
context.lineTo(base[droopSide][0], base[droopSide][1] + b * 0.1);
context.lineTo(base[0][0], base[0][1] + b * 0.1);
context.closePath();
context.fill();
context.stroke();
// Draw cheese drops
[0, 1, 2]
.map(() => Random.chance(0.75))
.forEach((doDraw, idx) => {
if (doDraw) {
drawCheese(
base,
droopSide,
{
location: Random.range(0 + 0.3 * idx, 0.25 + 0.35 * idx),
thickness: Random.range(0.03, 0.05),
length: Random.range(b * 0.125, b * 0.25),
},
context
);
}
});
// Draw crust
let crustScale = 1.12;
const crustFill = [angles[0], angle1, angle2].map((angle) =>
pointOnEllipse([cx, cy], angle, a * crustScale, b * crustScale)
);
context.strokeStyle = clrs.crust;
context.lineWidth = 32;
context.beginPath();
context.moveTo(...crustFill[1]);
context.ellipse(cx, cy, a * crustScale, b * crustScale, 0, angle1, angle2);
context.stroke();
crustScale = 1.21;
const crustOutline = [angles[0], angle1, angle2].map((angle) =>
pointOnEllipse([cx, cy], angle, a * crustScale, b * crustScale)
);
context.strokeStyle = clrs.outline;
context.lineWidth = 8;
context.beginPath();
context.moveTo(...crustOutline[1]);
context.ellipse(cx, cy, a * crustScale, b * crustScale, 0, angle1, angle2);
context.stroke();
// Draw pepperonis
const pepperonis = getPepperonis(base, {
radius: a * 0.1,
count: Random.rangeFloor(3, 5),
});
pepperonis.forEach((pepperoni) => {
context.fillStyle = clrs.pepperoni;
context.beginPath();
context.moveTo(pepperoni[0] + a * 0.1, pepperoni[1]);
context.arc(pepperoni[0], pepperoni[1], a * 0.1, 0, 2 * Math.PI);
context.fill();
context.stroke();
});
}
function randomAngles() {
const first = Random.range(0, Math.PI * 2);
const second = first + Random.range(Math.PI * 0.5, Math.PI);
const third = second + Random.range(Math.PI * 0.3, Math.PI * 0.4);
return [first, second, third];
}
function pointOnEllipse([cx, cy], theta, a, b) {
return [cx + a * Math.cos(theta), cy + b * Math.sin(theta)];
}
function randomPointInTriangle(triangle) {
let wb = Math.random();
let wc = Math.random();
// point will be outside of the triangle, invert weights
if (wb + wc > 1) {
wb = 1 - wb;
wc = 1 - wc;
}
const [a, b, c] = triangle.map((coords) => ({ x: coords[0], y: coords[1] }));
const rb_x = wb * (b.x - a.x);
const rb_y = wb * (b.y - a.y);
const rc_x = wc * (c.x - a.x);
const rc_y = wc * (c.y - a.y);
const r_x = rb_x + rc_x + a.x;
const r_y = rb_y + rc_y + a.y;
return [r_x, r_y];
}
function getPepperonis(base, { radius, count }) {
const pepperonis = [];
while (pepperonis.length <= count) {
const pepperoni = randomPointInTriangle(base);
const valid = pepperonis.reduce(
(res, pt) => res && !circleCollide(pepperoni, pt, radius),
true
);
if (valid) {
pepperonis.push(pepperoni);
}
}
return pepperonis;
}
function circleCollide([x1, y1], [x2, y2], r) {
const dist = Math.hypot(x2 - x1, y2 - y1);
return dist <= r + r ? true : false;
}
function drawCheese(base, droopSide, { location, length, thickness }, context) {
let cheeseA = lerpArray(
[base[0][0], base[0][1] - 4],
base[droopSide],
location
);
let cheeseB = lerpArray(
[base[0][0], base[0][1] - 4],
base[droopSide],
location + thickness
);
[cheeseA, cheeseB] =
cheeseA[0] < cheeseB[0] ? [cheeseB, cheeseA] : [cheeseA, cheeseB];
const cheeseCenter = (cheeseA[0] + cheeseB[0]) / 2;
const cheeseRadius = (cheeseA[0] - cheeseB[0]) / 2;
context.fillStyle = clrs.cheese;
context.strokeStyle = clrs.cheese;
context.beginPath();
context.moveTo(...cheeseA);
context.lineTo(cheeseA[0], cheeseA[1] + length);
context.arc(cheeseCenter, cheeseA[1] + length, cheeseRadius, 0, Math.PI);
context.lineTo(cheeseB[0], cheeseB[1]);
context.closePath();
context.fill();
context.stroke();
context.strokeStyle = clrs.outline;
context.beginPath();
context.moveTo(...cheeseA);
context.lineTo(cheeseA[0], cheeseA[1] + length);
context.arc(cheeseCenter, cheeseA[1] + length, cheeseRadius, 0, Math.PI);
context.lineTo(cheeseB[0], cheeseB[1]);
context.stroke();
}