Re: [Mesa3d-users] default light data

[Brian P. <br...@va...>]

Carlos Pereira wrote:
> 
> If I set the constant attenuation factor in a positional
> light (say Light0) to some value different from
> 1.0 (the default) and enable the light etc...
> 
> then disable the light and lighting (and color_material):
> 
> glDisable ((GLenum) GL_LIGHT0);
> 
> glDisable (GL_LIGHTING);
> glDisable (GL_NORMALIZE);
> glDisable (GL_COLOR_MATERIAL);
> 
> then create again the Light0 without saying nothing
> about the attenuation factor, mesa (3.4) still uses the
> non-default value I specified for the previous light0.

There's no such thing as "creating" lights.  You just
enable or disable them.


> Is this right? I thought Mesa would reset the light
> information in these situations... shall I explicitly
> reset the light defaults myself in these cases, or is
> there some light data reset command that I am missing?

Enabling/disabling lights does not effect any other lighting
state.  There is no reset command.

See the OpenGL programming guide for more info about lighting.

-Brian