Re: [Plib-users] plib and shadows

[Steve B. <sjb...@ai...>]

Rolf Jakob wrote:
> Hello,
> 
> how can I change the material of a leaf that's part of a database imported 
> from AC3D ?
> I traverse all leaves and set the state as following :
> 
>                         state->disable(GL_LIGHTING);
>                         state->disable(GL_BLEND);
>                         state->disable(GL_TEXTURE_2D);
>                         state->setColourMaterial(GL_DIFFUSE);
>                         state->setMaterial(GL_DIFFUSE,0.0f,0.0f,0.0f,0.5f);
>                         state->setShadeModel(GL_FLAT);
> 
> But the leaves are rendered in their colors, so the textures are missing. But 
> what I need is a whole ssgTransform in black. The branch in question was 
> created by a clone(SSG_CLONE_RECURSIVE|SSG_CLONE_STATE).

Can't you just set all of the light sources to black?

Unless you have luminous surfaces, that should work...and luminous
surfaces (arguably) shouldn't cast shadows.

You probably don't want to turn off texturing because something like a
tree could be shaped by the alpha part of the texture.  If you turn off
textures, every tree will cast a neat, perfectly rectangular, shadow!

----------------------------- Steve Baker -------------------------------
Mail : <sjb...@ai...>   WorkMail: <sj...@li...>
URLs : http://www.sjbaker.org
        http://plib.sf.net http://tuxaqfh.sf.net http://tuxkart.sf.net
        http://prettypoly.sf.net http://freeglut.sf.net
        http://toobular.sf.net   http://lodestone.sf.net