RE: dxf to OpenGL??

Priscila.

CC: email@hidden
From: email@hidden
To: email@hidden
Subject: Re: dxf to OpenGL??
Date: Fri, 7 Nov 2008 10:02:03 -0800

OpenGL does not mandate or specify any file formats. There are no "OpenGL files" to speak of.

If you already can read dxf and dwg file, than it seems to me you have everything you need. Just use the appropriate OpenGL commands to load up the data. I recommend reading about buffer objects (to allocate storage for vertex attributes such as position, normal and so forth), vertex arrays (for letting OpenGL know in which buffer objects you've laid out the geometry and how it is structured) and the batch draw commands (DrawArrays, DrawElements) for drawing your data.

If you need textures as well, look into the APIs for that (TexImage & friends).

In addition, you may also want to use shaders for your lighting, in which case you can choose between NVIDIA's Cg language, ARB assembly or GLSL.

For more information, http://www.opengl.org has the specification for OpenGL and GLSL, as well as the extension registry. Finally, the OpenGL man pages (http://opengl.org/sdk/docs/man/) are quite useful.

Alternatively, I suppose, you could convert those dxf or dwg files to some other format, such as OBJ, and then find an OpenGL loader for that format.

But as Jocelyn said, if you already have the parsing done, your work is half-done.

On 7-Nov-08, at 09:47, Priscila J.V. wrote:

Hello,

I have been developing an app in OpenGL but I need to use data from an autocad file.

I have already a library that can read dxf and dwg files, but I want to know if there is another library, framework, class or code; that can convert dxf or dwg files to OpenGL files.

Thanks,

Priscila

References:
	>dxf to OpenGL?? (From: Priscila J.V. <email@hidden>)
	>Re: dxf to OpenGL?? (From: Jean-Francois Roy <email@hidden>)