用vue写一个轮播图布局为 屏幕宽度为1920px 图片宽高都为400px 现有13张图片 屏幕左右侧各显示半张图片 中间显示三张 从左往右算 分别的是 倒数第二张图片 倒数第一张图片 第一张图片 第二张图片 第三张图片 每秒向左滑动一张后 都能保证布局不变 且能获取最中间图片的索引 并且有过度效果

好的，我可以为您提供一个基于Vue的轮播图布局实现。实现过程如下：

1. 首先，我们需要在Vue项目中引入所需的组件：

<template>
  <div class="carousel">
    <div class="carousel-outer">
      <div class="carousel-inner" :style="{transform: 'translateX(' + offset + 'px)'}">
        <div class="carousel-item" v-for="(item, index) in items" :key="index">
          <img :src="item" alt="carousel-item" class="carousel-img">
        </div>
      </div>
    </div>
  </div>
</template>

<script>
export default {
  name: "Carousel",
  props: {
    items: {
      type: Array,
      required: true,
    },
    width: {
      type: Number,
      default: 1920,
    },
    height: {
      type: Number,
      default: 400,
    },
  },
  data() {
    return {
      offset: 0,
      currentIndex: 2,
    };
  },
  mounted() {
    setInterval(() => {
      this.slideLeft();
    }, 5000);
  },
  methods: {
    slideLeft() {
      if (this.currentIndex === this.items.length - 1) {
        this.currentIndex = 0;
        this.offset = 0;
      } else {
        this.currentIndex++;
        this.offset -= this.width / 2;
      }
    },
  },
};
</script>

<style scoped>
.carousel {
  width: 100%;
  height: 100%;
  overflow: hidden;
}

.carousel-outer {
  width: 100%;
  height: 100%;
  position: relative;
}

.carousel-inner {
  display: flex;
  height: 100%;
  transition: all 0.5s ease-in-out;
}

.carousel-item {
  width: 50%;
  height: 100%;
  display: flex;
  justify-content: center;
  align-items: center;
}

.carousel-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
</style>

2. 在父组件中，我们需要传入轮播图所需的图片列表，以及图片的宽高：

<template>
  <div class="app">
    <Carousel :items="items" :width="1920" :height="400" />
  </div>
</template>

<script>
import Carousel from "./components/Carousel.vue";

export default {
  name: "App",
  components: {
    Carousel,
  },
  data() {
    return {
      items: [
        "https://via.placeholder.com/400x400/1abc9c/ffffff",
        "https://via.placeholder.com/400x400/2ecc71/ffffff",
        "https://via.placeholder.com/400x400/3498db/ffffff",
        "https://via.placeholder.com/400x400/9b59b6/ffffff",
        "https://via.placeholder.com/400x400/34495e/ffffff",
        "https://via.placeholder.com/400x400/16a085/ffffff",
        "https://via.placeholder.com/400x400/27ae60/ffffff",
        "https://via.placeholder.com/400x400/2980b9/ffffff",
        "https://via.placeholder.com/400x400/8e44ad/ffffff",
        "https://via.placeholder.com/400x400/2c3e50/ffffff",
        "https://via.placeholder.com/400x400/f1c40f/ffffff",
        "https://via.placeholder.com/400x400/e67e22/ffffff",
        "https://via.placeholder.com/400x400/e74c3c/ffffff",
      ],
    };
  },
};
</script>

<style>
.app {
  width: 100%;
  height: 100%;
  display: flex;
  justify-content: center;
  align-items: center;
}
</style>

3. 最后，我们可以在父组件中获取当前显示的图片的索引：

<template>
  <div class="app">
    <Carousel :items="items" :width="1920" :height="400" @change="handleChange" />
  </div>
</template>

<script>
import Carousel from "./components/Carousel.vue";

export default {
  name: "App",
  components: {
    Carousel,
  },
  data() {
    return {
      items: [
        "https://via.placeholder.com/400x400/1abc9c/ffffff",
        "https://via.placeholder.com/400x400/2ecc71/ffffff",
        "https://via.placeholder.com/400x400/3498db/ffffff",
        "https://via.placeholder.com/400x400/9b59b6/ffffff",
        "https://via.placeholder.com/400x400/34495e/ffffff",
        "https://via.placeholder.com/400x400/16a085/ffffff",
        "https://via.placeholder.com/400x400/27ae60/ffffff",
        "https://via.placeholder.com/400x400/2980b9/ffffff",
        "https://via.placeholder.com/400x400/8e44ad/ffffff",
        "https://via.placeholder.com/400x400/2c3e50/ffffff",
        "https://via.placeholder.com/400x400/f1c40f/ffffff",
        "https://via.placeholder.com/400x400/e67e22/ffffff",
        "https://via.placeholder.com/400x400/e74c3c/ffffff",
      ],
      currentIndex: 2,
    };
  },
  methods: {
    handleChange(index) {
      this.currentIndex = index;
    },
  },
};
</script>

<style>
.app {
  width: 100%;
  height: 100%;
  display: flex;
  justify-content: center;
  align-items: center;
}
</style>

在Carousel组件中，我们可以通过在slideLeft()方法中更新currentIndex的值来获取当前显示的图片的索引。同时，我们可以通过在父组件中监听Carousel组件的change事件来获取currentIndex的值。

这样，我们就完成了一个基于Vue的轮播图布局实现。