"Yazel, David J." wrote:
>
> Hi all.
>
> Pardon my ignorance, but what exactly can you do with Multi-texture and
> Texture color tables? I must be missing something, what visual techniques
> can be created using these two options.
Multitexturing allows combination colour effects. For example blending a
texture with another that specifies alpha values to get a gradually
decreasing texture. While this may be far more easily done at production
time, the advantage is you can move one texture relative to another at
run time to get funky effects - eg an object slowly disappearing. There
are many variations on this - light maps to generate the appearance of a
lit object (eg Quake II or Descent), bump maps (not bump mapping) etc.
Texture colour tables allow you to modulate the basic colour scheme of
the texture to get different effects - eg making them darker as the
light becomes less.
Basically most of the texture effects are there to reduce the cost of
lighting. That is, by simulating lighting effects by combining textures,
you avoid the high cost of the lighting calculations. For example the
rocket flying down the hallway at 30fps is hideously expensive to
calculate in real time using lights, but with textures it is much
cheaper - particularly in large world where you probably have more light
sources than hardware supported.
--
Justin Couch Author, Java Hacker
http://www.vlc.com.au/~justin/ Java 3D FAQ Maintainer
http://www.j3d.org/ J3D.org The Java 3D Community Site
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