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The Lighting panel controls the number, position, and color of the light sources used in shading. <CENTER><IMG SRC="pix/light.gif"><P>The Lighting Panel</CENTER>
The Lighting panel is different from the Appearance and Material panels in that it always works with the base appearance. This is because it usually makes sense to use the same set of lights for drawing all objects in your scene.
Geomview's Appearance, Materials, and Lighting
panels are constructed to allow you to easily do most of the appearance
related things that you might want to do. The appearance hierarchy that
Geomview supports internally, however, is very complex and there are
certain operations that you cannot do with the panels. The Geomview
command language (gcl) provides complete support for appearance operations.
In particular, the merge-baseap
command can be used to change the
base appearance (which, except for lighting, cannot be changed by
Geomview's panels). The merge-ap
command can be used to change
an individual geom's appearance. Appearances can also be specified in
OOGL files; for details, see section 4.1.8 Appearances.
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