Re: [Flightgear-devel] New texture draw method

[Erik H. <er...@eh...>]

"Curtis L. Olson" wrote:
> 
> Erik Hofman writes:
> > > What annoying white lines?  GL_MODULATE allows you to light/shade a
> > By white lines i mean the "gaps" between textures which pop up randomly.
> 
> I don't think I'm seeing this at all on Linux or Windows.  Can you
> capture the effect in a screen shot?
> 
> > > textured polygon.  GL_DECAL completely overwrites any lighting
> > > information.
> >
> > Yeah, i noticed. Flying at night isn't that realistic anymore.
> > Could another way to do the same be something like this:
> >
> > Don't reflect the textures on a white surface, but instead use the color
> > used then textures are off, and change the textures to get the same
> > color again (e.g. multiplying by the difference between white and the
> > color used)?
> 
> As far as I know GL_MODULATE is *the* only way to combine texture with
> lighting effects.  You might be able to get what you suggest to do something,
> but I think that the underlying polygon color defines the maximum RGB
> value that a pixel will be in the end ... the texture when
> GL_MODULATE'd will only reduce the original RGB values ...

Darn.

> 
> It sounds like you may have a bug in your opengl implimentation????

SGI Irix -> Bug in OpenGL ???
Neh ;-)

Erik