从dxf文件读取坐标c＃

Question

我在c＃中编写代码以从dxf文件中读取点坐标。我基本上是逐行阅读DXF文件，并检查条件如if(i == "AcdbLine")将点的坐标写入文件。

AcDbLine 
10 
0.0 
20 
0.0 
30 
0.0 
11 
700.0 
21 
0.0 
31 
0.0 
    0 
LINE 

这将坐标写为（0,0,0）（700,0,0）。

我现在的问题是在区块内发现它时忽略AcDbLine。我想编写一个逻辑，当它落在AcDbBlockBegin和AcDbBlockEnd的块内时，它将忽略任何AcDbline及其相应的点。

AcDbBlockBegin 
    2 
*U1 
70 
    1 
10 
0.0 
20 
0.0 
30 
0.0 
    3 
*U1 
    1 

    0 
LINE 
    5 
3F0 
330 
3E9 
100 
AcDbEntity 
    8 
0 
100 
AcDbLine 
10 
-47.22702216883923 
20 
-0.0131059296418084 
30 
0.0 
11 
-19.82207380431916 
21 
-0.0131059296418084 
31 
0.0 
    0 
LINE 
    5 
3F1 
330 
3E9 
100 
AcDbEntity 
    8 
0 
100 
AcDbLine 
10 
22.19765948514734 
20 
0.0131059296418101 
30 
0.0 
11 
47.22702216883923 
21 
0.0131059296418101 
31 
0.0 
    0 
ENDBLK 
    5 
3EB 
330 
3E9 
100 
AcDbEntity 
    8 
0 
100 
AcDbBlockEnd 

对不起，感谢您的帮助！

Answer 1

我一直在写文本解析器超过40年。如果我做不到，没有人能做到。尝试下面的代码

using System; 
using System.Collections.Generic; 
using System.Linq; 
using System.Text; 
using System.IO; 

namespace ConsoleApplication1 
{ 
    class Program 
    { 
     enum State 
     { 
      FIND_BLOCK, 
      GET_ACDB_LINE, 
      ACD_BLOCK 
     } 
     const string FILENAME = @"c:\temp\test.txt"; 
     static void Main(string[] args) 
     { 
      StreamReader reader = new StreamReader(FILENAME); 
      string inputLine = ""; 
      State state = State.FIND_BLOCK; 
      int lineRow = 0; 
      Line newLine = new Line(); 
      while ((inputLine = reader.ReadLine()) != null) 
      { 
       inputLine = inputLine.Trim(); 
       if (inputLine.Length > 0) 
       { 
        switch (state) 
        { 
         case State.FIND_BLOCK : 
          switch (inputLine) 
          { 
           case "AcDbBlockBegin" : 
            state = State.ACD_BLOCK; 
            break; 
           case "AcDbLine": 
            state = State.GET_ACDB_LINE; 
            lineRow = 0; 
            newLine = new Line(); 
            Line.lines.Add(newLine); 
            break; 
          } 
          break; 

         case State.ACD_BLOCK : 
          if (inputLine == "AcDbBlockEnd") 
          { 
           state = State.FIND_BLOCK; 
          } 
          break; 

         case State.GET_ACDB_LINE : 
          if (inputLine == "LINE") 
          { 
           state = State.FIND_BLOCK; 
          } 
          else 
          { 
           switch (++lineRow) 
           { 
            case 2: 
             newLine.xLoc = double.Parse(inputLine); 
             break; 
            case 4: 
             newLine.yLoc = double.Parse(inputLine); 
             break; 
            case 6: 
             newLine.zLoc = double.Parse(inputLine); 
             break; 
            case 8: 
             newLine.xVal = double.Parse(inputLine); 
             break; 
            case 10: 
             newLine.yVal = double.Parse(inputLine); 
             break; 
            case 12: 
             newLine.zVal = double.Parse(inputLine); 
             break; 
           } 
          } 
          break; 
        } 
       } 
      } 

     } 
     public class Line 
     { 
      public static List<Line> lines = new List<Line>(); 
      public double xLoc { get; set; } 
      public double xVal { get; set; } 
      public double yLoc { get; set; } 
      public double yVal { get; set; } 
      public double zLoc { get; set; } 
      public double zVal { get; set; } 
     } 
    } 
}