Re: [COEN-290] doubts on final

Dave Shreiner (
Tue, 20 Mar 2001 12:30:58 -0800 (PST)

> Hi Dave
> I had a couple of doubts:
> 1. Lighting is done in eye coordinate space ..right???


> 2. What about texturing from the notes i gather that when we generate the
> texture if we generate in eye space the object appears to be floating in the
> texture and if we do it in world space the texture appears as a wall paper
> around the object si i assume that we generate the texture and do texture
> mapping in worl space. Am I right???

   The topic that I think you're discussing is linear texture coordinate
generation. In that mode, as specified by the last parameter in


determine which space the texture coordinate computation will be done
in. For GL_EYE_LINEAR, the texture generation planes specified are
transformed into eye coordinates, whereas for, GL_OBJECT_LINEAR, the
planes specified remain in world coordinates, and the computations occur

> 3. Is ray tracing also done in eye space or world space??/

   World space, mostly.

> Thanks
> Tamanna
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Thanx, Dave


Dave Shreiner <> Silicon Graphics, Inc. (650) 933-4899

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