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308 lines
10 KiB
JavaScript
308 lines
10 KiB
JavaScript
import { gsap } from 'gsap';
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class CursorRainEffect {
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constructor(options = {}) {
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this.rainContainer = null;
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this.drops = [];
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this.isInitialized = false;
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this.mouseMoveHandler = null;
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this.timeoutId = null;
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this.animationPool = [];
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this.options = {
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maxDrops: options.maxDrops ?? 50,
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dropSize: options.dropSize ?? [2, 8],
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color: options.color ?? 'rgba(173, 216, 230, 0.8)',
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duration: options.duration ?? [0.8, 1.5],
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delay: options.delay ?? 100,
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enabled: options.enabled ?? true,
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zIndex: options.zIndex ?? 9999,
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container: options.container ?? document.body
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};
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this.container = this.options.container;
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}
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init() {
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if (this.isInitialized) {
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return;
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}
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this.createRainContainer();
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this.setupEventListeners();
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this.preCreateDrops();
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this.isInitialized = true;
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}
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destroy() {
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if (!this.isInitialized) {
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return;
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}
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this.cleanup();
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this.isInitialized = false;
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}
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enable() {
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this.options.enabled = true;
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if (this.isInitialized) {
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this.setupEventListeners();
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}
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}
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disable() {
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this.options.enabled = false;
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this.removeEventListeners();
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}
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updateOptions(newOptions) {
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this.options = { ...this.options, ...newOptions };
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if (newOptions.container && newOptions.container !== this.container) {
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this.container = newOptions.container;
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if (this.isInitialized) {
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this.destroy();
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this.init();
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}
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}
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}
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createRainContainer() {
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this.rainContainer = document.createElement('div');
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this.rainContainer.className = 'cursor-rain-container';
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this.rainContainer.style.cssText = `
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position: fixed;
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top: 0;
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left: 0;
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width: 100vw;
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height: 100vh;
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pointer-events: none;
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z-index: ${this.options.zIndex};
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overflow: hidden;
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`;
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this.container.appendChild(this.rainContainer);
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}
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preCreateDrops() {
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// Pre-create drop elements for better performance
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for (let i = 0; i < this.options.maxDrops; i++) {
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const drop = this.createDropElement();
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this.animationPool.push(drop);
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if (this.rainContainer) {
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this.rainContainer.appendChild(drop);
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}
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}
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}
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createDropElement() {
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const drop = document.createElement('div');
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drop.className = 'rain-drop';
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drop.style.cssText = `
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position: absolute;
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background: ${this.options.color};
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border-radius: 50% 50% 50% 50% / 90% 90% 10% 10%;
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pointer-events: none;
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opacity: 0;
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transform-origin: center bottom;
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`;
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return drop;
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}
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setupEventListeners() {
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if (!this.options.enabled) {
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return;
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}
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this.removeEventListeners();
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this.mouseMoveHandler = this.throttle((e) => {
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this.createRainAtPosition(e.clientX, e.clientY);
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}, 16); // ~60fps throttling
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document.addEventListener('mousemove', this.mouseMoveHandler, { passive: true });
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}
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removeEventListeners() {
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if (this.mouseMoveHandler) {
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document.removeEventListener('mousemove', this.mouseMoveHandler);
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this.mouseMoveHandler = null;
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}
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if (this.timeoutId) {
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clearTimeout(this.timeoutId);
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this.timeoutId = null;
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}
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}
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createRainAtPosition(x, y) {
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if (!this.rainContainer || this.drops.length >= this.options.maxDrops) {
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return;
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}
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// Get available drop from pool
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const dropElement = this.getAvailableDrop();
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if (!dropElement) {
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return;
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}
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const size = this.randomBetween(this.options.dropSize[0], this.options.dropSize[1]);
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const duration = this.randomBetween(this.options.duration[0], this.options.duration[1]);
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// Add some randomness to position
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const offsetX = this.randomBetween(-20, 20);
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const offsetY = this.randomBetween(-10, 10);
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const finalX = x + offsetX;
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const finalY = y + offsetY;
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const drop = {
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element: dropElement,
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x: finalX,
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y: finalY,
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size,
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isAnimating: true
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};
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this.drops.push(drop);
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// Set initial position and size
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gsap.set(dropElement, {
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x: finalX - size / 4, // 调整X偏移，因为宽度变小了
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y: finalY - size / 2,
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width: size * 0.3, // 宽度减小到原来的30%，让雨滴更细
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height: size * 4, // 高度增加到4倍，让雨滴更长
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opacity: 0,
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scaleY: 0.1,
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rotation: this.randomBetween(-15, 15)
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});
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// Animate the raindrop - continuous fall with gradual rotation change
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const initialRotation = this.randomBetween(-15, 15); // 初始随机角度
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const fallDistance = window.innerHeight - finalY + 100;
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const tl = gsap.timeline({
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onComplete: () => {
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this.returnDropToPool(drop);
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}
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});
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// 快速出现
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tl.to(dropElement, {
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opacity: 1,
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scaleY: 1,
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duration: 0.1,
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ease: 'power2.out'
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})
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// 连续下落：一次性完成整个下落过程，同时角度逐渐变垂直
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.to(dropElement, {
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y: `+=${fallDistance}`, // 一次性完成所有下落距离
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x: `+=${initialRotation * 0.3}`, // 轻微的水平漂移
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scaleY: 1.5, // 逐渐拉长
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opacity: 0.3, // 逐渐变透明
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rotation: 0, // 角度从初始角度平滑变为垂直
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duration: duration,
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ease: 'power1.in' // 重力加速效果
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}, 0.05);
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}
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getAvailableDrop() {
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return this.animationPool.find(drop => gsap.getTweensOf(drop).length === 0) || null;
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}
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returnDropToPool(drop) {
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const index = this.drops.indexOf(drop);
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if (index > -1) {
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this.drops.splice(index, 1);
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}
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drop.isAnimating = false;
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// Reset the element
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gsap.set(drop.element, {
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opacity: 0,
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x: 0,
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y: 0,
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scaleY: 1,
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rotation: 0
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});
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}
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randomBetween(min, max) {
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return Math.random() * (max - min) + min;
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}
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throttle(func, delay) {
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let timeoutId = null;
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let lastExecTime = 0;
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return (...args) => {
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const currentTime = Date.now();
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if (currentTime - lastExecTime > delay) {
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func(...args);
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lastExecTime = currentTime;
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}
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else {
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if (timeoutId) {
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clearTimeout(timeoutId);
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}
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timeoutId = window.setTimeout(() => {
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func(...args);
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lastExecTime = Date.now();
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}, delay - (currentTime - lastExecTime));
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}
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};
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}
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cleanup() {
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this.removeEventListeners();
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// Kill all GSAP animations
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this.drops.forEach(drop => {
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gsap.killTweensOf(drop.element);
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});
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this.drops = [];
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this.animationPool = [];
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if (this.rainContainer && this.rainContainer.parentNode) {
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this.rainContainer.parentNode.removeChild(this.rainContainer);
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this.rainContainer = null;
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}
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}
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}
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/**
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* Create a new cursor rain effect instance
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*/
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function createCursorRainEffect(options) {
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return new CursorRainEffect(options);
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}
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/**
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* Initialize cursor rain effect with default options
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* This is a convenience function for quick setup
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*/
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function initCursorRain(options) {
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const effect = createCursorRainEffect(options);
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// Auto-initialize when DOM is ready
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if (document.readyState === 'loading') {
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document.addEventListener('DOMContentLoaded', () => {
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effect.init();
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});
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}
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else {
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// DOM is already ready
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effect.init();
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}
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return effect;
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}
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/**
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* VitePress compatible initialization
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* This function ensures the effect works correctly in VitePress environment
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*/
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function initCursorRainForVitePress(options) {
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const effect = createCursorRainEffect({
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container: document.body,
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zIndex: 1000, // Lower z-index to avoid conflicts with VitePress UI
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...options
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});
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// Handle VitePress page navigation
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const initEffect = () => {
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// Small delay to ensure VitePress has finished rendering
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setTimeout(() => {
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effect.init();
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}, 100);
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};
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// Handle both initial load and client-side navigation
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if (typeof window !== 'undefined') {
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if (document.readyState === 'loading') {
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document.addEventListener('DOMContentLoaded', initEffect);
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}
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else {
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initEffect();
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}
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// Handle VitePress client-side navigation
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window.addEventListener('popstate', () => {
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effect.destroy();
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initEffect();
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});
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// Handle programmatic navigation (if using Vue Router)
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if (window.history && window.history.pushState) {
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const originalPushState = window.history.pushState;
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window.history.pushState = function (...args) {
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originalPushState.apply(window.history, args);
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effect.destroy();
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initEffect();
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};
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}
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}
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return effect;
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}
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// Default export for convenience
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var index = {
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createCursorRainEffect,
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initCursorRain,
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initCursorRainForVitePress,
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CursorRainEffect
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};
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export { CursorRainEffect, createCursorRainEffect, index as default, initCursorRain, initCursorRainForVitePress };
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