sandyre / libopencad

OpenSource library under X/MIT license to work with CAD files (DWG/DXF). Please use repository linked below, this one is abandoned.

libopencad

Ubuntu 14.04 (gcc 4.8 + clang):

OpenSource library under X11/MIT license for everyday use. Under development, but some of basic functionality is already available. This project is being developed by Alexandr Borzykh (sandyre) under mentorship of Dmitry Baryshnikov (NextGIS).

Current project state:

DWG	Read	Write	Features	Missing
R13-14	-	-	-	-
R15	+	-	Reading of layers.Basic geometry reading. Exporting header variables and classes.	Linetypes, CRC calculation, by-block reading.
R17	-	-	-	-

Getting started

First you need to download repository

git clone https://github.com/sandyre/libopencad

Static library way

Then, run cmake

cmake CMakeLists.txt

Build the project

make -j4

At this point, you will have a static library at lib/libopencadstatic.(your OS static library extension) All you have to do now - is to link library with your project, and include associated header files - opencad_api.h, cadgeometries.h and others.

Dynamic library way

Then, run cmake

cmake -DBUILD_SHARED_LIBS=ON CMakeLists.txt

Build the project

make -j4

At this point, you will have a dynamic library at lib/libopencad{library version}.(your OS dynamic library extension) All you have to do now - is to link library with your project, and include associated header files - opencad_api.h, cadgeometries.h and others.

Library sources inclusion way

All you have to do is to link the lib/ directory to your project file tree, that's actually it.

Usage example

As an example of library usage, there is a built-in app called cadinfo (builds by default with library, available in apps/ directory).

#include <iostream>
# include "lib/opencad_api.h"

// returns nullptr on fail. GetLastErrorCode() returns an error code.
CADFile *pCADFile = OpenCADFile( pszCADFilePath,
                                      CADFile::OpenOptions::READ_ALL );

const CADHeader& header = pCADFile->getHeader ();
header.print (); // prints CAD Header variables.
cout << endl;

const CADClasses& classes = pCADFile->getClasses ();
classes.print (); // prints custom CAD classes
cout << endl;

for ( size_t i = 0; i < pCADFile->getLayersCount (); ++i )
{
    CADLayer &layer = pCADFile->getLayer (i);
    cout << "Layer #" << i << " contains "
         << layer.getGeometryCount () << " geometries" << endl;

    for ( size_t j = 0; j < layer.getGeometryCount (); ++j )
    {
        unique_ptr<CADGeometry> geom(layer.getGeometry (j));

        if ( geom == nullptr )
            continue;

        switch ( geom->getType() ) // returns GeometryType enum.
        {
            case CADGeometry::CIRCLE:
                CADCircle * poCADCircle = ( CADCircle* ) geom.get();
                std::cout << poCADCircle->getPosition().getX() << std::endl;
                std::cout << poCADCircle->getPosition().getY() << std::endl;
                std::cout << poCADCircle->getPosition().getZ() << std::endl;
                break;
            // any other geometry type you need.
        }
    }
}

Contribution

Feel free to submit an issue, or make a pull request. To begin with, it's better to fix some FIXME/TODO's, to get more familiar with code base.

Library documentation

Documentation is generated by Doxygen, available at this link