✨ feat: complete star trail background

components.d.ts

@@ -17,6 +17,8 @@ declare module 'vue' {
     MyComponent: typeof import('./src/components/MyComponent.vue')['default']
     RouterLink: typeof import('vue-router')['RouterLink']
     RouterView: typeof import('vue-router')['RouterView']
+    StarTrails: typeof import('./src/components/StarTrails.vue')['default']
+    StraTrails: typeof import('./src/components/StraTrails.vue')['default']
     TheWelcome: typeof import('./src/components/TheWelcome.vue')['default']
     WelcomeItem: typeof import('./src/components/WelcomeItem.vue')['default']
   }

src/App.vue

@@ -1,35 +1,21 @@
 <script setup>
-import MyComponent from './components/MyComponent.vue'
+import StarTrails from './components/StarTrails.vue'
 </script>
 
 <template>
-  <div class="flex flex-col h-[100vh] justify-center items-center">
-    <MyComponent msg="Vue" />
-    <div
-      text="44px"
-      color="blue"
-    >
-      Unocss
+  <StarTrails />
+  <!-- <div f-c-c absolute h-100vh w-full left-0 top-0>
+    <div text-18 text-white>
+      小孙同学
     </div>
-    <a-button type="primary">
-      Ant-Design-vue
-    </a-button>
-    <div class="flex h-[60px] justify-between items-center">
-      <RouterLink to="/" class="w-[80px]">
-        <div class="text-center">
-          Home
-        </div>
-      </RouterLink>
-      <RouterLink to="/about" class="w-[80px]">
-        <div class="text-center">
-          About
-        </div>
-      </RouterLink>
+  </div> -->
+  <div bg-black f-c-c h-100vh>
+    <div text-white>
+      正在开发中...
     </div>
-
-    <RouterView />
   </div>
 </template>
 
 <style lang="scss" scoped>
+
 </style>

src/assets/css/main.css

@@ -1,28 +1,11 @@
-:root {
-  font-family: Inter, system-ui, Avenir, Helvetica, Arial, sans-serif;
-  line-height: 1.5;
-  font-weight: 400;
-
-  color-scheme: light dark;
-  color: rgba(255, 255, 255, 0.87);
-  background-color: #242424;
-
-  font-synthesis: none;
-  text-rendering: optimizeLegibility;
-  -webkit-font-smoothing: antialiased;
-  -moz-osx-font-smoothing: grayscale;
+* {
+  padding: 0;
+  margin: 0;
 }
 
-// 浅色
-@media (prefers-color-scheme: light) {
-  :root {
-    color: #213547;
-    background-color: #ffffff;
-  }
-  a:hover {
-    color: #747bff;
-  }
-  button {
-    background-color: #f9f9f9;
-  }
+body {
+  font-family: pingfang sc, helvetica, arial, sans-serif;
+  font-size: 16px;
+  line-height: 1.6;
+  color: #333;
 }

src/components/MyComponent.vue

@@ -1,13 +0,0 @@
-<script setup>
-const props = defineProps({
-  msg: String,
-})
-</script>
-
-<template>
-  <div>Hello {{ props.msg }}!</div>
-</template>
-
-<style lang="scss" scoped>
-
-</style>

src/components/StarTrails.vue

@@ -0,0 +1,124 @@
+<script setup>
+import { onMounted } from 'vue'
+
+onMounted(() => {
+  // 创建两个 canvas 元素，show 用于显示，help 作为辅助
+  const help = document.createElement('canvas')
+  const show = document.getElementById('trails')
+
+  // 声明两个变量 showWidth 和 showHeight，用于存储显示区域的宽度和高度
+  let showWidth, showHeight
+
+  // 让两个 canvas 的宽高与显示区域的宽高一致
+  show.width = help.width = showWidth = show.offsetWidth
+  show.height = help.height = showHeight = show.offsetHeight
+
+  const longSide = Math.max(showWidth, showHeight)
+  // 使用长边构造成一个大点的正方形
+  help.width = longSide * 2.6
+  help.height = longSide * 2.6
+
+  // 获取上下文
+  const showContext = show.getContext('2d')
+  const helpContext = help.getContext('2d')
+
+  // 设置显示区域背景色
+  showContext.fillStyle = 'rgba(0,0,0,1)'
+  showContext.fillRect(0, 0, showWidth, showHeight)
+
+  // 创建随机颜色随机位置的星星
+  function rand(Min, Max) {
+    return Min + Math.round(Math.random() * (Max - Min))
+  }
+
+  // 随机颜色（指定范围）
+  function randomColor() {
+    const r = rand(120, 255)
+    const g = rand(120, 255)
+    const b = rand(120, 255)
+    const a = rand(30, 100) / 100
+    return `rgba(${r},${g},${b},${a})`
+  }
+
+  // 星星数组
+  const stars = []
+
+  // 创建每个星星的属性
+  function createStar() {
+    return {
+      x: rand(-help.width, help.width),
+      y: rand(-help.height, help.height),
+      size: 1.2,
+      color: randomColor(),
+    }
+  }
+
+  // 绘制星星实例
+  function drawStar() {
+    let count = stars.length
+    while (count--) {
+      const star = stars[count]
+      helpContext.beginPath()
+      helpContext.arc(star.x, star.y, star.size, 0, Math.PI * 2, true)
+      helpContext.fillStyle = star.color
+      helpContext.closePath()
+      helpContext.fill()
+    }
+  }
+
+  // 计时
+  let drawTimes = 0
+  // 循环
+  function loop() {
+    // 开始绘制
+    showContext.drawImage(help, -help.width / 2, -help.height / 2)
+
+    drawTimes++
+
+    if (drawTimes > 200 && drawTimes % 8 === 0) {
+      showContext.fillStyle = 'rgba(0,0,0,.04)'
+      showContext.fillRect(-(longSide * 3), -(longSide * 3), longSide * 6, longSide * 6)
+    }
+    // 旋转
+    showContext.rotate(0.025 * Math.PI / 180)
+  }
+
+  let count = 18000
+
+  while (count--)
+    stars.push(createStar())
+
+  drawStar()
+
+  // 根据比例调整圆心
+  if (showWidth < showHeight * 1.5)
+    showContext.translate(showWidth, showHeight)
+  else
+    showContext.translate(showWidth, 0)
+
+  function animate() {
+    window.requestAnimationFrame(animate)
+    loop()
+  }
+
+  animate()
+
+  // 监听浏览器窗口变化，变化则重新执行animate函数
+  window.addEventListener('resize', () => {
+    showWidth = show.offsetWidth
+    showHeight = show.offsetHeight
+    show.width = showWidth
+    show.height = showHeight
+    showContext.fillStyle = 'rgba(0,0,0,1)'
+    showContext.fillRect(0, 0, showWidth, showHeight)
+  })
+})
+</script>
+
+<template>
+  <div h-100vh>
+    <canvas id="trails" wh-full />
+  </div>
+</template>
+
+<style lang="scss" scoped></style>