vue3 随机生产音符扩散效果

<template>
  <div class="container">
    <div class="flower-center"></div>
    <div 
      class="note-petal"
      v-for="note in activeNotes"
      :key="note.id"
      :style="note.style"
    >
      {{ note.symbol }}
    </div>
    <div class="controls">
      <button @click="toggleAnimation">{{ isPlaying ? '暂停动画' : '播放动画' }}</button>
    </div>
  </div>
</template>

<script setup>
import { ref, onMounted, onUnmounted } from 'vue'

const activeNotes = ref([])
const isPlaying = ref(true)
let animationInterval = null
let noteCounter = 0

const noteSymbols = ['♪', '♫', '♩', '♬', '♭', '♮', '♯']
const colors = [
  '#ff6b6b', '#4ecdc4', '#ffbe76', 
  '#a5d8ff', '#d8b4fe', '#ff9e9e', '#b5ead7'
]

function createPetalGroup() {
  const newNotes = []
  // 随机生成5-12个音符
  const noteCount = Math.floor(Math.random() * 8) + 5
  
  for (let i = 0; i < noteCount; i++) {
    const angle = (i * (Math.PI * 2 / noteCount)) + (Math.random() * 0.5 - 0.25)
    const distance = 300 + Math.random() * 150
    const endX = Math.cos(angle) * distance
    const endY = Math.sin(angle) * distance
    const rotation = (Math.random() * 60 - 30)
    
    const noteId = `note-${Date.now()}-${noteCounter++}`
    
    newNotes.push({
      id: noteId,
      symbol: noteSymbols[Math.floor(Math.random() * noteSymbols.length)],
      style: {
        color: colors[Math.floor(Math.random() * colors.length)],
        '--end-x': `${endX}px`,
        '--end-y': `${endY}px`,
        '--rotation': `${rotation}deg`,
        'animation-duration': `${3 + Math.random() * 1.5}s`
      }
    })
  }
  
  activeNotes.value = [...activeNotes.value, ...newNotes]
  
  setTimeout(() => {
    activeNotes.value = activeNotes.value.filter(note => !newNotes.some(newNote => newNote.id === note.id))
  }, 4000)
}

function startAnimation() {
  if (animationInterval) clearInterval(animationInterval)
  createPetalGroup()
  animationInterval = setInterval(createPetalGroup, 1200)
  isPlaying.value = true
}

function stopAnimation() {
  clearInterval(animationInterval)
  isPlaying.value = false
}

function toggleAnimation() {
  if (isPlaying.value) {
    stopAnimation()
  } else {
    startAnimation()
  }
}

onMounted(() => {
  startAnimation()
})

onUnmounted(() => {
  stopAnimation()
})
</script>

<style>
.container {
  position: relative;
  width: 100vw;
  height: 100vh;
  background: radial-gradient(circle at center, #1a2a6c, #2a5298);
  overflow: hidden;
}

.flower-center {
  position: absolute;
  width: 120px;
  height: 120px;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  background: radial-gradient(circle, rgba(255,255,255,0.9) 0%, rgba(255,255,255,0) 80%);
  border-radius: 50%;
  z-index: 1;
  animation: flowerPulse 3s ease-in-out infinite;
}

@keyframes flowerPulse {
  0%, 100% { transform: translate(-50%, -50%) scale(1); opacity: 0.8; }
  50% { transform: translate(-50%, -50%) scale(1.4); opacity: 1; }
}

.note-petal {
  position: absolute;
  font-size: 48px;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  animation: petalBloom 4s ease-out forwards;
  opacity: 0;
  text-shadow: 0 0 20px currentColor;
  z-index: 10;
  will-change: transform, opacity;
}

@keyframes petalBloom {
  0% {
    transform: translate(-50%, -50%) scale(0.5) rotate(0deg);
    opacity: 0;
    filter: blur(3px);
  }
  20% {
    opacity: 1;
    transform: translate(-50%, -50%) scale(1) rotate(0deg);
    filter: blur(0);
  }
  80% {
    opacity: 0.7;
  }
  100% {
    transform: translate(var(--end-x), var(--end-y)) scale(0.3) rotate(var(--rotation));
    opacity: 0;
    filter: blur(2px);
  }
}

.controls {
  position: absolute;
  bottom: 40px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 100;
}

button {
  padding: 12px 24px;
  background: linear-gradient(45deg, #ff6b6b, #ff8e8e);
  border: none;
  border-radius: 30px;
  color: white;
  font-weight: bold;
  cursor: pointer;
  transition: all 0.3s;
  box-shadow: 0 4px 15px rgba(255, 107, 107, 0.4);
}

button:hover {
  transform: translateY(-3px);
  box-shadow: 0 6px 20px rgba(255, 107, 107, 0.6);
}
</style>