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index.js
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index.js
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function createInstance(name) {
const template = q(`[data-model="${name}"]`);
const instance = template.cloneNode(true);
delete instance.dataset.model;
return instance;
}
function q(selector) {
return document.querySelector(selector)
}
const plane = q('.plane');
const cake = {
slices: [],
slideInDuration: 3000,
allowInteraction: false,
spinOutDuration: 500,
rotation: 0,
remove(slice) {
this.slices = this.slices.filter(s => s !== slice);
if (this.slices.length === 0) {
onFinished();
}
},
element: q('.cake')
}
function createSlice(options) {
const instance = createInstance('slice');
const instance_shadow = createInstance('slice-shadow');
function onMouseEnter() {
if (!cake.allowInteraction) return;
instance.style.transform = options.transform_hover;
instance_shadow.style.transform = options.transform_shadow_hover;
instance.classList.add('hover');
instance_shadow.classList.add('hover');
}
function onMouseLeave() {
if (!cake.allowInteraction) return;
instance.style.transform = options.transform;
instance_shadow.style.transform = options.transform_shadow;
instance.classList.remove('hover');
instance_shadow.classList.remove('hover');
}
function onClick() {
if (!cake.allowInteraction) return;
instance.removeEventListener('mouseover', onMouseEnter);
instance.removeEventListener('mouseleave', onMouseLeave);
instance.classList.add('spin-out');
instance_shadow.classList.add('spin-out');
instance.style.transform = options.transform_spin_out;
instance_shadow.style.transform = options.transform_shadow_spin_out;
setTimeout(() => {
instance.remove();
instance_shadow.remove();
}, cake.spinOutDuration);
cake.rotation += 30;
plane.style.transform = `rotateX(-24deg) rotateY(${cake.rotation}deg) rotateX(90deg) translateZ(-150px)`;
cake.remove(instance);
}
instance.style.transform = options.transform;
instance_shadow.style.transform = options.transform_shadow;
instance.addEventListener('mouseover', onMouseEnter);
instance.addEventListener('mouseleave', onMouseLeave);
instance.addEventListener('click', onClick);
cake.element.appendChild(instance);
plane.appendChild(instance_shadow);
return instance;
}
function onFinished() {
plane.classList.add('finished');
plane.style.transitionDuration = '2s';
plane.style.transform = null;
const plate = q('.plate');
plate.addEventListener('click', () => { plate.classList.toggle('flip'); });
}
for (let i = 0; i < 360; i += 30) {
const slice = createSlice({
transform: `translateY(-50%) translateZ(150px) rotateZ(${i}deg)`,
transform_hover: `translateY(-50%) translateZ(150px) rotateZ(${i}deg) translate3d(120px, 0, 160px)`,
transform_shadow: `translateY(-50%) rotateZ(${i}deg) translateZ(0.1px)`,
transform_shadow_hover: `translateY(-50%) rotateZ(${i}deg) translate3d(120px, 0, 0) translateZ(0.1px) scale(1.1)`,
transform_spin_out: `translateY(-50%) translateZ(1200px) rotateZ(${i}deg) translateX(800px)`,
transform_shadow_spin_out: `translateY(-50%) rotateZ(${i}deg) translate3d(800px, 0, 0) translateZ(0.1px) scale(1.5)`,
});
cake.slices.push(slice);
}
window.addEventListener('load', () => {
plane.classList.add('spin-in');
setTimeout(() => {
cake.allowInteraction = true;
}, cake.slideInDuration);
document.querySelectorAll('[data-hidden]').forEach(element => {
element.style.opacity = 1;
});
});
function getPoint(angle, len) {
const x = len * Math.sin(angle / 180 * Math.PI);
const y = len * Math.cos(angle / 180 * Math.PI);
return { x, y }
}
function createRegularPoligon(numVertices, len) {
let result = '';
const angle = 360 / numVertices;
for (let i = 0; i < numVertices; i++) {
const { x, y } = getPoint(angle * i, len);
result += `${Math.round(x)},${Math.round(y)} `
}
return result;
}