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Writing AutoCad DXF files

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Introduction

This article demonstrate how to write an ASCII DXF files. A DXF file is a file composed of sections and associated values. They are read by AutoCad and then converted to a drawing.

I have developped a class CDxf to write a DXF file from an application. Then the user must use AutoCad to interpret the DXF file.

I have included only a small portion of what can be do with DXF files. All the details are contained in the following document from the AutoDesk web site : http://www.autodesk.com/techpubs/autocad/dxf/.

// Here is the code to write a DXF file that will draw a circle in AutoCad.
// 
void CDxf::Circle ()
{
 // 1000 diameter circle
 // Creation of an output stream objet in text mode.
 // ios::app : append
 ofstream FichierDxf ("TestDxf.dxf", ios::app);

 // Draw the circle
 FichierDxf << 0          << endl;
 FichierDxf << "CIRCLE"   << endl;
 FichierDxf << 8          << endl;       // Group code for layer name
 FichierDxf << 0          << endl;       // Layer number
 FichierDxf << 10         << endl;       // Center point of circle
 FichierDxf << 0.0        << endl;       // X in OCS coordinates
 FichierDxf << 20         << endl;
 FichierDxf << 0.0        << endl;       // Y in OCS coordinates
 FichierDxf << 30         << endl;
 FichierDxf << 0.0        << endl;       // Z in OCS coordinates
 FichierDxf << 40         << endl;       // radius of circle
 FichierDxf << 500.0      << endl;       

 FichierDxf.close();
}

By being able to write a DXF file, I can integrate into my applications a way to share information with AutoCad. Obviously there is a lot more that can be added to this class.

License

This article has no explicit license attached to it but may contain usage terms in the article text or the download files themselves. If in doubt please contact the author via the discussion board below.

Writing AutoCad DXF files

Writing AutoCad DXF files Posted on 21-03-2014  Is your email address OK? You are signed up for our newsletters but your email address is either unconfirmed, or has not been reconfirmed in a long time. Please click here to have a confirmation email sent so we can confirm your email address and start sending you newsletters again. Alternatively, you can update your subscriptions. http://www.autodesk.com/techpubs/autocad/dxf/ 5/10 613

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