ObjectARX, RealDWG or Teigha?

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I'm planning on developing a piece of software that reads & manipulates data in a .dwg file. Instead of writing my own library that handles the 'reading' of the data file, I've decided to use either RealDWG or Teigha, however I'm struggling to understand exactly how they work.

I wish to trial the libraries before committing to paying the license. I've noticed that RealDWG is a subset of ObjectARX (more specifically ObjectDBX), of which I can obtain a trial license. So, if I download ObjetARX, can I use the ObjectDBX subset to develop my application prototype? What are the limitations (if any) of doing this?

My other option was to use Teigha, would this be slower than using RealDWG in the long run? What are the pros/cons of using either RealDWG or Teigha?

teigha objectarx autocad-plugin dwg autocad
2 Answers

There is no more Teigha now, it is now called ODA (Open Design Alliance) drawings SDK. There are many ODA based products which can be downloaded and used as trial version. Most of these products offer API kits along with complete documentation. You can try one product here for 30 days with full API and samples to read and write DWG and DXF files.

ODA Libaries are very powerful now and support other file formats of Revit, Navisworks, PDF etc. in addition to standard DWG and DXF formats.

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