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Opensource OpenGL scenegraph

By fluffy grue in News
Wed Mar 01, 2000 at 04:04:13 PM EST
Tags: Software (all tags)
Software

Finally, a Free(speech) alternative to IRIS Performer - OpenRM. It uses OpenGL as its underlying graphics API, and seems more complete than Performer. This should hopefully get more serious graphics (and games) development going on under Linux and the like (though it's platform-independent, and also has a Win32 version). <plug type="shameless">For my own graphics programming, though, I'll just continue to develop Solace. :)</plug>


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Opensource OpenGL scenegraph | 4 comments (4 topical, editorial, 0 hidden)
Interesting, and I like the plug. ... (none / 0) (#1)
by emjay on Wed Mar 01, 2000 at 03:22:14 PM EST

emjay voted 1 on this story.

Interesting, and I like the plug.
-------------------------
We can't stop here, this is bat country!

Re: Opensource OpenGL scenegraph (none / 0) (#2)
by renec on Wed Mar 01, 2000 at 05:18:48 PM EST

SGI's performer is already out for Linux with a GPL license I believe....

?

Re: Opensource OpenGL scenegraph (none / 0) (#3)
by fluffy grue on Wed Mar 01, 2000 at 08:08:02 PM EST

My understanding of the license was that it wasn't GPL, but that it was free(beer) for non-commercial use. For commercial use you still had to obtain a VERY costly license, and "commercial use" precluded any sort of income (such as free engine, proprietary artwork). Regardless, Performer is lacking a lot of functionality which OpenRM will implement. A fresh start is oftentimes a good thing.
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[ Parent ]

Re: Opensource OpenGL scenegraph (none / 0) (#4)
by tagore on Fri Mar 03, 2000 at 12:15:36 AM EST

This is very cool. I can't wait to start playing with it.

Sorry to be contrarian (I notice that all threee of the first posts made here have quibbled to one degree or another), but this is nowhere near as complete as Performer, at least from a vissim point of view (which is exactly what Performer was designed for).

Performer has:

1. Import modules for a lot of formats.

2. Great intersection testing.

3. Great texture handling.

4. Constant framerates (very important for real vissim)

5. clipmapping

6. a great (if difficult) adaptive meshing scheme

7. Quite a number of other things

Also, some of Performer's more important features were closely tied to high-end SGI hardware. In particular the clipmapping features relied on having (if I recall correctly) an iR box. Angus Dorbie forcibly convinced me that a lot of the high-end features simply couldn't be ported to other platforms. I remain convinced.

That said, I think this is really great. I've really been missing escher (the Onyx iR box I used to work on). Part of the reason is the _stupid_ framerates it used to pump out (can you say free texture mapping?). But part of it is Performer. This isn't quite the same thing, but it's a lot better than an expensive commercial version of Inventor, and I'm sure it will get at least some of the above missing features in time.


Opensource OpenGL scenegraph | 4 comments (4 topical, 0 editorial, 0 hidden)
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