>> I have been following the mailing list for some time now and I have some
>> doubts about the Online Geometry Viewer.

Thanks for sharing your doubts.  Discussion is good. ;)

>> 1. In my experience, rendering polygonal models has been faster and less
>> painstaking then NURBS, and they also provide better local controls for
>> editing the models. Since the OGV takes .obj files as input, shouldn't there
>> be an option for editing polygonal models as well?

It depends on the complexity and quality of the model.  Highly detailed 
geometry can actually be rendered faster in NURBS form than in polygonal form, 
but we're certainly not precluding polygonal models regardless.

Note that our emphasis is on CAD features, which includes a focus on "solid 
modeling" and managed geometry.  This is a different set of features than you 
tend to find with polygonal "content modelers" like Maya and Blender.  Think 
CATIA, AutoCAD, Solidworks, NX, and Pro/E. They predominantly use (NURBS-based) 
boundary representation geometry.

I'd also don't WANT to overlap with tools like Blender more than is necessary.  
Our domain has more than enough to keep us busy for several lifetimes. ;)

> My only fear is when we have
> BRL-CAD on back-end, and our web app is just an online wrapper, the
> stuff we will be doing may become a bit CPU hungry.

I'm not sure that "just on online wrapper" would be a good or bad thing.  
There's a ton of back-end functionality that really should be leveraged because 
it would be entirely impractical to handle in the browser (like geometry 
import/conversion/export processing, animation rendering, etc).

Cheers!
Sean



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