CSS3转盘抽奖动画特效

原创已于 2025-06-27 11:27:11 修改 · 937 阅读

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于 2025-06-16 14:44:06 首次发布

<!DOCTYPE html>
<html lang="zh">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>CSS3转盘抽奖动画特效</title>
<style>
body {
margin: 0;
padding: 0;
display: flex;
justify-content: center;
align-items: center;
height: 100vh;
background: #f5f5f5;
font-family: 'Microsoft YaHei', sans-serif;
overflow: hidden;
}

.lottery-container {
position: relative;
width: 400px;
height: 400px;
}

.wheel {
position: relative;
width: 100%;
height: 100%;
border-radius: 50%;
background: #fff;
box-shadow: 0 0 20px rgba(0, 0, 0, 0.2);
overflow: hidden;
transition: transform 4s cubic-bezier(0.17, 0.67, 0.12, 0.99);
transform: rotate(0deg);
}

.wheel.spinning {
transform: rotate(1800deg); /* 5圈 */
}

.wheel-center {
position: absolute;
width: 60px;
height: 60px;
background: #e74c3c;
border-radius: 50%;
top: 50%;
left: 50%;
transform: translate(-50%, -50%);
z-index: 10;
box-shadow: 0 0 10px rgba(0, 0, 0, 0.3);
display: flex;
justify-content: center;
align-items: center;
color: white;
font-weight: bold;
cursor: pointer;
}

.wheel-center::before {
content: '';
position: absolute;
width: 0;
height: 0;
border-left: 15px solid transparent;
border-right: 15px solid transparent;
border-bottom: 30px solid #e74c3c;
top: -25px;
left: 50%;
transform: translateX(-50%);
}

.section {
position: absolute;
width: 50%;
height: 50%;
transform-origin: 100% 100%;
left: 0;
top: 0;
border: 1px solid #ddd;
box-sizing: border-box;
display: flex;
align-items: center;
justify-content: center;
padding-left: 50px;
font-size: 16px;
font-weight: bold;
color: white;
text-shadow: 1px 1px 2px rgba(0, 0, 0, 0.5);
}

/* 8个扇区 */
.section:nth-child(1) {
background: #e74c3c;
transform: rotate(0deg) skewY(45deg);
}
.section:nth-child(2) {
background: #3498db;
transform: rotate(45deg) skewY(45deg);
}
.section:nth-child(3) {
background: #2ecc71;
transform: rotate(90deg) skewY(45deg);
}
.section:nth-child(4) {
background: #f1c40f;
transform: rotate(135deg) skewY(45deg);
}
.section:nth-child(5) {
background: #9b59b6;
transform: rotate(180deg) skewY(45deg);
}
.section:nth-child(6) {
background: #1abc9c;
transform: rotate(225deg) skewY(45deg);
}
.section:nth-child(7) {
background: #d35400;
transform: rotate(270deg) skewY(45deg);
}
.section:nth-child(8) {
background: #34495e;
transform: rotate(315deg) skewY(45deg);
}

.section-text {
transform: skewY(-45deg) rotate(22.5deg);
text-align: center;
width: 80px;
}

.pointer {
position: absolute;
width: 0;
height: 0;
border-left: 20px solid transparent;
border-right: 20px solid transparent;
border-top: 40px solid #e74c3c;
top: -20px;
left: 50%;
transform: translateX(-50%);
z-index: 5;
filter: drop-shadow(0 0 5px rgba(0, 0, 0, 0.3));
}

.result {
position: absolute;
bottom: -60px;
left: 50%;
transform: translateX(-50%);
background: #fff;
padding: 10px 20px;
border-radius: 30px;
box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
font-size: 18px;
font-weight: bold;
color: #e74c3c;
opacity: 0;
transition: opacity 0.5s ease;
}

.result.show {
opacity: 1;
}

.confetti {
position: absolute;
width: 10px;
height: 10px;
background: #f00;
opacity: 0;
z-index: 20;
}

.hidden-link {
position: absolute;
bottom: 20px;
left: 50%;
transform: translateX(-50%);
color: rgba(0, 0, 0, 0.3);
font-size: 12px;
text-decoration: none;
}
</style>
</head>
<body>
<div class="lottery-container">
<div class="pointer"></div>
<div class="wheel" id="wheel">
<div class="section"><div class="section-text">一等奖</div></div>
<div class="section"><div class="section-text">二等奖</div></div>
<div class="section"><div class="section-text">三等奖</div></div>
<div class="section"><div class="section-text">四等奖</div></div>
<div class="section"><div class="section-text">五等奖</div></div>
<div class="section"><div class="section-text">六等奖</div></div>
<div class="section"><div class="section-text">七等奖</div></div>
<div class="section"><div class="section-text">八等奖</div></div>
</div>
<div class="wheel-center" id="startBtn">开始抽奖</div>
<div class="result" id="result"></div>
</div>

// 开始抽奖
startBtn.addEventListener('click', function() {
if (isSpinning) return;
isSpinning = true;

// 重置转盘
wheel.style.transform = 'rotate(0deg)';
wheel.classList.remove('spinning');
result.classList.remove('show');
result.textContent = '';
confettiContainer.innerHTML = '';

// 随机选择奖项 (这里设置三等奖概率高一些作为演示)
let randomPrize;
const rand = Math.random();
if (rand < 0.1) {
randomPrize = 0; // 一等奖 10%
} else if (rand < 0.3) {
randomPrize = 1; // 二等奖 20%
} else if (rand < 0.6) {
randomPrize = 2; // 三等奖 30%
} else if (rand < 0.7) {
randomPrize = 3; // 四等奖 10%
} else if (rand < 0.8) {
randomPrize = 4; // 五等奖 10%
} else if (rand < 0.85) {
randomPrize = 5; // 六等奖 5%
} else if (rand < 0.95) {
randomPrize = 6; // 七等奖 10%
} else {
randomPrize = 7; // 八等奖 5%
}

// 计算停止角度 (每个扇区45度)
const stopAngle = 360 - (randomPrize * 45 + 22.5); // 22.5是半个扇区的角度

// 开始旋转
setTimeout(() => {
wheel.classList.add('spinning');
wheel.style.transform = `rotate(${stopAngle}deg)`;
}, 10);

// 旋转结束后显示结果
setTimeout(() => {
isSpinning = false;
result.textContent = `恭喜获得: ${prizes[randomPrize]}`;
result.classList.add('show');

// 如果中了一等奖，放烟花
if (randomPrize === 0) {
createConfetti();
}
}, 4100);
});

// 创建彩色纸屑效果
function createConfetti() {
const colors = ['#e74c3c', '#3498db', '#2ecc71', '#f1c40f', '#9b59b6', '#1abc9c', '#d35400', '#34495e'];

for (let i = 0; i < 100; i++) {
setTimeout(() => {
const confetti = document.createElement('div');
confetti.classList.add('confetti');
confetti.style.left = `${Math.random() * 100}%`;
confetti.style.top = `${Math.random() * 100}%`;
confetti.style.backgroundColor = colors[Math.floor(Math.random() * colors.length)];
confetti.style.transform = `rotate(${Math.random() * 360}deg)`;
confetti.style.width = `${5 + Math.random() * 10}px`;
confetti.style.height = `${5 + Math.random() * 10}px`;
confetti.style.borderRadius = Math.random() > 0.5 ? '50%' : '0';

confettiContainer.appendChild(confetti);

// 动画
setTimeout(() => {
confetti.style.opacity = '1';
confetti.style.transform = `translate(${(Math.random() - 0.5) * 200}px, ${Math.random() * 200 + 100}px) rotate(${Math.random() * 360}deg)`;
confetti.style.transition = `all ${1 + Math.random() * 2}s ease-out`;

// 移除
setTimeout(() => {
confetti.remove();
}, 3000);
}, 10);
}, i * 30);
}
}
</script>
</body>
</html>