VUE使用DXFParser组件解析dxf文件生成图片的操作代码

<template>
  <div>
    <input type="file" @change="handleFileChange" />
  </div>
  <el-table :data="tableData" style="width: 100%">
    <el-table-column prop="Control_No" label="序号" width="180" />
    <el-table-column prop="Index" label="编号" width="180" />
    <el-table-column prop="ID" label="ID" width="180" />
    <el-table-column prop="BH" label="编号" width="180" />
    <el-table-column prop="Piece_Name" label="部位名称" width="180" />
    <el-table-column prop="data" label="日期" />'
    <el-table-column label="精品图片">
      <template v-slot="scope">
        <!-- 在这里访问tableData.vertices中的数据 -->
        <div id="imageContainer">
          <!-- 使用scope.row来获取当前行的数据 -->
          <img :src="generateCanvasImage(scope.row.vertices)" alt="精品图片" />
        </div>
      </template>
    </el-table-column>
  </el-table>
</template>
<script>
import DXFParser from 'dxf-parser';
export default {
  data() {
    return {
      tableData: [],
    }
  },
  methods: {
    handleFileChange(event) {
      const file = event.target.files[0];
      const reader = new FileReader();
      reader.onload = (e) => {
        const contents = e.target.result;
        // const decoder = new TextDecoder('utf-8');
        // const decodedContents = decoder.decode(contents);
        const parser = new DXFParser();
        const dxf = parser.parseSync(contents);
        // 处理解析后的DXF数据
        this.processDXF(dxf);
        // console.log(this.processDXF(dxf))
      };
      reader.readAsText(file);
      // reader.readAsArrayBuffer(file)
    },
    processDXF(dxf) {
      // 在这里处理解析后的DXF数据
      console.log(dxf);
      this.tableData.splice(0, this.tableData.length);
      // 示例：绘制一些图形到canvas上
      console.log(dxf.blocks)
      // dxf.blocks.forEach((e)=>{
      //   console.log(e)
      // })
      var Control_No = 1;
      for (var key in dxf.blocks) {
        if ('entities' in dxf.blocks[key]) {
          // console.log(dxf.blocks[key].entities[0].type)
          for (var i in dxf.blocks[key].entities) {
            if ("TEXT" === dxf.blocks[key].entities[i].type) {
              var ver = [];
              for (var w = 4; w < dxf.blocks[key].entities.length; w++) {
                if (dxf.blocks[key].entities[w].vertices) {
                  dxf.blocks[key].entities[w].vertices[0].new = true
                  ver = ver.concat(dxf.blocks[key].entities[w].vertices);
                }
              }
              console.log(ver.concat(dxf.blocks[key].entities[5].vertices))
              var newItem = {
                Control_No: Control_No++,
                Index: key,
                ID: dxf.blocks[key].entities[0].text,
                BH: dxf.blocks[key].entities[1].text,
                Piece_Name: dxf.blocks[key].entities[2].text,
                vertices: ver,
                data: dxf.blocks[key].entities[3].text
              };
              this.tableData.push(newItem); // 将新对象添加到tableData数组中
              break;
            }
          }
        }
      }
    },
    generateCanvasImage(vertices) {
      // 获取Canvas元素
      var canvas = document.createElement("canvas");
      var ctx = canvas.getContext("2d");
      // 设置多边形的颜色
      var color = "#FF0000"; // 十六进制颜色值，例如 16711680 对应的颜色为红色
      // 顶点坐标列表
      // 计算图形的包围框
      var minX = Number.MAX_VALUE;
      var minY = Number.MAX_VALUE;
      var maxX = Number.MIN_VALUE;
      var maxY = Number.MIN_VALUE;
      for (var i = 0; i < vertices.length; i++) {
        var vertex = vertices[i];
        minX = Math.min(minX, vertex.x);
        minY = Math.min(minY, vertex.y);
        maxX = Math.max(maxX, vertex.x);
        maxY = Math.max(maxY, vertex.y);
      }
      // 计算缩放因子
      var width = maxX - minX;
      var height = maxY - minY;
      var scale = Math.min(canvas.width / width, canvas.height / height);
      // 绘制多边形
      ctx.beginPath();
      ctx.strokeStyle = color; // 设置描边颜色
      ctx.lineWidth = 1; // 设置线宽
      // 移动到第一个顶点
      ctx.moveTo((vertices[0].x - minX) * scale, (vertices[0].y - minY) * scale);
      // 依次连接顶点
      for (var e = 1; e < vertices.length; e++) {
        if (vertices[e].new === true) {
          console.log("true");
          // 如果条件成立，移动到当前顶点位置，不连接上一次的顶点
          ctx.moveTo((vertices[e].x - minX) * scale, (vertices[e].y - minY) * scale);
        } else {
          // 否则继续连接顶点
          ctx.lineTo((vertices[e].x - minX) * scale, (vertices[e].y - minY) * scale);
        }
      }
      // 关闭多边形路径
      ctx.closePath();
      // 绘制多边形
      ctx.stroke();
      // 将Canvas内容转换为图片路径
      var imgDataURL = canvas.toDataURL("image/png");
      // 在HTML页面上显示图片
      var imgElement = document.createElement("img");
      imgElement.src = imgDataURL;
      return imgElement.src
      // 将图片元素添加到页面中的图片容器
      // var container = document.getElementById("imageContainer");
      // container.appendChild(imgElement);
    }
  }
}
</script>