Re: File Size Tricks?

James Waldrop ([email protected])
Tue, 17 Oct 1995 16:06:49 -0700

>>Avoid shipping normals around the net; wherever possible, let the
>>browser generate them automatically.
>
>Whoa! Vertex normals aren't extraneous information that can be recalculated.
>They define the lighted shape of the model, and can be calculated accurately
>only from the original geometry the VRML IndexedFaceSet is approximating.
>Models that want to be lit should include them.

He said whenever possible. In many models, the normals can be
calculated on the fly. I've found that Normals are about 25% of
a typical VRML file, so this savings should not be ignored.

James

--
James Waldrop				/   Technical Director
[email protected]		/	    Construct Internet Design
[email protected]		/		    http://www.construct.net

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