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const init = () => {
const SIZE = 100;
const DPR = globalThis.devicePixelRatio || 1;
const FPS = 15;
const colorBackground = "rgb(255, 255, 255)";
const color蜜柑の果実 = "rgb(255, 165, 0)";
const color蜜柑の内果皮 = "rgb(255, 255, 255)";
const color蜜柑のじょうのう = "rgb(255, 255, 255)";
const colorMosaic = [
[255, 165, 0],
[255, 140, 0],
[255, 215, 0],
[255, 205, 114],
[255, 210, 127],
[255, 192, 76],
[255, 169, 12],
[255, 228, 178],
];
const colorEye = "rgb(0, 0, 0)";
const container = document.getElementById("myIcon");
const canvas = document.createElement("canvas");
canvas.width = SIZE * DPR;
canvas.height = SIZE * DPR;
canvas.style.width = `${SIZE}px`;
canvas.style.height = `${SIZE}px`;
const ctx = canvas.getContext("2d");
ctx.scale(DPR, DPR);
let frameCount = 0;
function randomChoice(xs) {
return xs[(Math.random() * xs.length) | 0];
}
function roundRect(x, y, w, h, r) {
ctx.beginPath();
ctx.moveTo(x + r, y);
ctx.lineTo(x + w - r, y);
ctx.quadraticCurveTo(x + w, y, x + w, y + r);
ctx.lineTo(x + w, y + h - r);
ctx.quadraticCurveTo(x + w, y + h, x + w - r, y + h);
ctx.lineTo(x + r, y + h);
ctx.quadraticCurveTo(x, y + h, x, y + h - r);
ctx.lineTo(x, y + r);
ctx.quadraticCurveTo(x, y, x + r, y);
ctx.closePath();
ctx.fill();
}
function draw蜜柑() {
// 果実、外果皮
ctx.fillStyle = color蜜柑の果実;
ctx.beginPath();
ctx.arc(50, 50, 50, 0, Math.PI * 2);
ctx.fill();
// 内果皮
ctx.strokeStyle = color蜜柑の内果皮;
ctx.lineWidth = 4;
ctx.beginPath();
ctx.arc(50, 50, 45, 0, Math.PI * 2);
ctx.stroke();
// じょうのう
ctx.strokeStyle = color蜜柑のじょうのう;
ctx.lineWidth = 2;
for (let t = 0; t < 10; t++) {
ctx.save();
ctx.translate(50, 50);
ctx.rotate((t * Math.PI) / 5);
ctx.beginPath();
ctx.moveTo(0, -45);
ctx.lineTo(0, 0);
ctx.stroke();
ctx.beginPath();
ctx.moveTo(0, -40);
ctx.lineTo(-4, -45);
ctx.lineTo(4, -45);
ctx.closePath();
ctx.stroke();
ctx.beginPath();
ctx.moveTo(0, -20);
ctx.lineTo(-3, 0);
ctx.lineTo(3, 0);
ctx.closePath();
ctx.stroke();
ctx.restore();
}
}
function drawMosaic(f) {
for (let dy = 0; dy < 10; dy++) {
for (let dx = 0; dx < 10; dx++) {
const y = dy * 10;
const x = dx * 10;
if (x < 50) {
continue;
}
if ((x - 45) ** 2 + (y - 45) ** 2 > 55 ** 2) {
continue;
}
if (Math.random() < 0.167 * f) {
continue;
}
const [r, g, b] = randomChoice(colorMosaic);
const a = 0.9 - f * 0.05;
ctx.fillStyle = `rgba(${r}, ${g}, ${b}, ${a})`;
ctx.fillRect(x, y, 10, 10);
}
}
}
function drawEyes() {
ctx.fillStyle = colorEye;
roundRect(30, 35, 6, 25, 2);
roundRect(64, 35, 6, 25, 2);
}
function mainLoop() {
frameCount++;
if (4 <= frameCount % 15) {
setTimeout(mainLoop, 1000 / FPS);
return;
}
ctx.fillStyle = colorBackground;
ctx.fillRect(0, 0, SIZE, SIZE);
ctx.clearRect(0, 0, SIZE, SIZE);
draw蜜柑();
drawMosaic(frameCount % 15);
drawEyes();
setTimeout(mainLoop, 1000 / FPS);
}
mainLoop();
while (container.firstChild) {
container.removeChild(container.firstChild);
}
container.appendChild(canvas);
};
document.addEventListener("DOMContentLoaded", init);
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