If(Ent is DXFVisibleEntity) Result = E.FColor public static Color EntColor(DXFEntity E, DXFInsert Ins) For instance, many Entities have 'base point' - in DXF, which is described by codes: 10 (x), 20 (y), 30(z):Ĭopy Code // Use this func to know the color of Entity, DXFInsert is Insert entity or null. The method to read properties of entities is essentially similar to the one described above but it has one important point: different entities have both identical and different properties. Return E // return Entity and after it is added to the array of Entities

each Entity will need reference to the Base object Converter, which stores all Entities. Return null // here we do not create entity case ' ENDBLK':Ĭase ' LINE': // for 'LINE' value we create DXFLine objectĬase ' SECTION': // 'SECTION' will be object to store other objects like LineĬase ' INSERT': // insert is reference to block.ĭefault: // there are many other objects are possible.

This method is called for all FCode = 0 public DXFEntity CreateEntity() Entities can be also names of Sections and many other internal DXF objects. Entities here are not only those which visible in AutoCAD. Below is a very simple example, to show the main parts:Ĭopy Code // take a pair of lines in DXF file, repeat this till 'EOF': public void Next()įCode = Convert.ToInt32(FStream.ReadLine()) // code DXF StructureĭXF is an open ASCII format from Autodesk and you can easily find documentation on it in the web. This article is to tell you how to write the DXF reader in C#, what problems can arise and of course you can find example in C# source code, which is free for use under MPL license. Hence, the development for CAD drawings is often required but is not easy to implement. Official DXF Reference from Autodesk has 256 pages though it fails to describe many important facts. They have dozens of objects with hundreds of interaction tricks and thousands of properties. The problem is that DXF and DWG formats are really complicated. The most popular CAD formats are AutoCAD DWG and AutoCAD DXF, the latter being 'simplified' dwg - a special format to be used by developers. Software development in industry, building and many other fields requires working with CAD drawings.

Autocad file format