To LUGNET HomepageTo LUGNET News HomepageTo LUGNET Guide Homepage
 Help on Searching
 
Post new message to lugnet.cadOpen lugnet.cad in your NNTP NewsreaderTo LUGNET News Traffic PageSign In (Members)
 CAD / 14710
14709  |  14711
Subject: 
Re: LDraw File Format Spec 1.0 DRAFT - Call for Public Comments
Newsgroups: 
lugnet.cad
Date: 
Tue, 21 Aug 2007 20:33:58 GMT
Viewed: 
7005 times
  
In lugnet.cad, Travis Cobbs wrote:
> 
> OpenGL is designed for high performance, and explicitly states either that they
> are forbidden, or the behavior is undefined (probably the latter).  OpenGL has
> the same restrictions on polygons though.  If you want your OpenGL program to
> support concave polygons, you have to tesselate them into triangles yourself.
> 
> --Travis

Page 16 of the OpenGL spec, v2.1 states:

"Only convex polygons are guaranteed to be drawn correctly by the GL."

Rob



Message is in Reply To:
  Re: LDraw File Format Spec 1.0 DRAFT - Call for Public Comments
 
(...) I'm not sure yet what we on the LSC will decide with respect to concave quads. It may be that we'll change that paragraph to a recommendation. I personally don't like them, but I can see Orion's point. I may write a utility program to (...) (19 years ago, 21-Aug-07, to lugnet.cad)

55 Messages in This Thread:


















Entire Thread on One Page:
Nested:  All | Brief | Compact | Dots
Linear:  All | Brief | Compact
    

©2005 LUGNET. All rights reserved. - hosted by steinbruch.info GbR