Melchior FRANZ writes:
>
>Here's why my tdfx v3 doesn't show fog any more[1]: it's the
>glPolygonOffset() in the 3D-panel code. And I remembered that
>Andy had commented on this problem a while back in the already
>mentioned thread ...
< snip >
>Index: panel.cxx
>===================================================================
>RCS file: /var/cvs/FlightGear-0.7/FlightGear/src/Cockpit/panel.cxx,v
>retrieving revision 1.75
>diff -u -3 -p -r1.75 panel.cxx
>--- panel.cxx 22 Jul 2002 19:09:42 -0000 1.75
>+++ panel.cxx 23 Jul 2002 18:59:07 -0000
>@@ -423,6 +423,7 @@ FGPanel::draw()
>
> // restore some original state
> glPopAttrib();
>+ glPolygonOffset(0, 0);
> glDisable(GL_POLYGON_OFFSET_FILL);
> }
Does this slightly different code work for you
void
FGPanel::draw()
{
// In 3D mode, it's possible that we are being drawn exactly on top
// of an existing polygon. Use an offset to prevent z-fighting. In
// 2D mode, this is a no-op.
glPushAttrib( GL_COLOR_BUFFER_BIT | GL_ENABLE_BIT | GL_POLYGON_BIT |
GL_LIGHTING_BIT
| GL_TEXTURE_BIT | GL_PIXEL_MODE_BIT );
......
// glDisable(GL_POLYGON_OFFSET_FILL);
glPopAttrib () ;
}
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