From 7015eff6976a6eb9bf923ecc5d6feed231aaf430 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E4=B8=8D=E5=81=9A=E7=A0=81=E5=86=9C?= <599854767@qq.com>
Date: Fri, 22 Apr 2022 07:12:35 +0800
Subject: [PATCH] =?UTF-8?q?=E6=96=B0=E5=A2=9E=E5=8A=A0=E6=98=9F=E7=A9=BA?=
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---
 src/views/components/starBackground.vue | 58 +++++++++++++++++++++++++
 1 file changed, 58 insertions(+)
 create mode 100644 src/views/components/starBackground.vue

diff --git a/src/views/components/starBackground.vue b/src/views/components/starBackground.vue
new file mode 100644
index 0000000..8456a24
--- /dev/null
+++ b/src/views/components/starBackground.vue
@@ -0,0 +1,58 @@
+<template>
+  <div class="stars">
+    <div class="star" v-for="(item, index) in starsCount" :key="index" ref="star"></div>
+  </div>
+</template>
+
+<script setup name="starBackground">
+import { getCurrentInstance, onMounted } from 'vue'
+
+const starsCount = ref(600)
+const distance = ref(800)
+const { proxy } = getCurrentInstance()
+onMounted(() => {
+  initStars()
+})
+function initStars() {
+  let starArr = proxy.$refs.star
+  starArr.forEach((item) => {
+    let speed = 0.2 + Math.random() * 1
+    let thisDistance = distance.value + Math.random() * 300
+    item.style.transformOrigin = `0 0 ${thisDistance}px`
+    item.style.transform = `translate3d(0, 0, -${thisDistance}px) rotateY(${Math.random() * 360}deg) rotateX(${Math.random() * -50}deg) scale(${speed}, ${speed})`
+  })
+}
+</script>
+
+<style scoped lang="scss">
+@keyframes rotate {
+  0% {
+    transform: perspective(600px) rotateZ(20deg) rotateX(-40deg) rotateY(0);
+  }
+  100% {
+    transform: perspective(600px) rotateZ(20deg) rotateX(-40deg) rotateY(-360deg);
+  }
+}
+
+.stars {
+  transform: perspective(500px);
+  transform-style: preserve-3d;
+  // position: absolute;
+  perspective-origin: 50% 100%;
+  left: 50%;
+  animation: rotate 90s infinite linear;
+  bottom: -200px;
+  // 注意要用fixed，不然会超出屏幕
+  position: fixed;
+}
+
+.star {
+  width: 2px;
+  height: 2px;
+  background: #f7f7b8;
+  position: absolute;
+  top: 0;
+  left: 0;
+  backface-visibility: hidden;
+}
+</style>