Re: [vox-tech] opengl: lines and points

[Ken Bloom <MAPSkabloom@ucdavis.edu>]

On Sun, 30 Jan 2005 10:05:42 -0500
p@dirac.org (Peter Jay Salzman) wrote:

> On Sat 29 Jan 05, 10:38 PM, Ken Bloom <kabloom@ucdavis.edu> said:
> > On Sun, 30 Jan 2005 00:49:56 -0500
> > p@dirac.org (Peter Jay Salzman) wrote:
>  
> [original code snipped - reposted below]
> 
> > I'm not sure why it shows up for you when you deleted one of the
> > lines, but when I ran your code as written, the lines were outside
> > the (-1.0,-1.0) to (1.0,1.0) clipping box, so they weren't getting
> > drawn. Changing the coordinates helped, and they were both drawn.
> 
> Wait -- what clipping box?  I request an 800x600 window.  The camera
> should be positioned at the origin, facing down the -z axis, and have
> coordinates 800 by 600.

When you request an 800x600 window, the camera is positioned at the
origin, facing down the -z axis, and has coordinates ranging from -1 to
1 on each axis. You didn't give me reshape() last time.

Your new program works for me with both tDisplay() and xDisplay()


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