How to edit dwg files (AutoCAD)

[kingsta]

Hi friends,

I want to write/read *.dwg files (AutoCAD Software format) on my qt application. Basically, I want to read/write dwg files such as txt files. I want to draw lines, circles, rectangles, use layer system, change object's color etc. Do you know how to do this? I can't afford license price. I want to make a free SDKs.

I found somethings

• RealDWG: License price is very high for me. I am a student.
• ObjectARX: needs AutoCAD Software on system.

[snasoft]

May be this is helpful for your project: "Open DWG":http://www.opendwg.org/
And also this: "Lx-viewer project":https://sourceforge.net/projects/lx-viewer/files/

[marstay]

I think that the dxflib may will help you. Is about dxf files but I believe you can convert them between dxf and dwg in order to achieve the result you want. Here is a link http://www.qcad.org/en/dxflib-downloads

[kingsta]

Thanks for reply guys. I try this libraries in order. I downloaded Teigha Xtension (TX) SDK (old name DWGdirect™). Secondly, I will download dxflib. When I do something, I am going to inform you guys. If there is a anyone who knows another library, please keep me informed.

[bydag]

Know this is an old thread, but I'll try.
How was your experiences with this kingsta?