> > If so, how would you calculate the normal vector at v(1)? Is it the
> > average of two normal
> > vectors calculated from two triangles that share v(1)?
>
> Yup. To generate smooth normals, average the the normals of all the triangles
> which are adjacent to the vertex. For best results, weight the vectors based on
> the area of the triangles (i.e. large triangles have more affect on the averaged
> normal than small triangles).
We weight vectors proportionally to the inverse of the triangle's area.
When triangles are generated as an iso-surface of a field, some folks
generate normal vectors by estimating the field's gradient (the direction
of fastest increase in field values). You might want to experiment with
different schemes.
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