Nurbs vs Polygon modeling - Better, or equal-but-different? 2005-05-23 - By hans_k
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~~Richard K~~ <magnatude@(protected)> skrev den Sun, 22 May 2005 12:31:25
-0700:
> One thing I noticed with NURBS, I created a default sphere for a planet
> and
> rendered...
> I was not impressed because it looked like it low-poly'd my NURBS sphere!
> (Flat edges)
> Is there a setting I missed?
I do not know what you missed, but you certailny was not looking at a
render of a nurbs sphere.
Compare this (the top right is a nurbs sphere, top left is a polyhedron
with 128 faces and the bottom one is a polyhedron with 512 faces-
(Actually it is just the nurbs object that i a sphere. It is not
possible to make a polyhedron sphere - it can have millions of faces,
it is still a polyhedron, not a sphere. Well if you have an *ethernal*
number of faces, then it is a sphere.
The difference becomes even more obvious if you make a hole through
the spheres. If anyone can make a hole as smooth with polyhedron
boolean, as the curve projection on nurbs that is to the right here
http://www.visulogik.com/tS/kulor2.jpg, then I really want to see that
and know how (s)he made it. No matter how many faces, there will be
interpolation artifacts at the booleande edge.
RorrKonn <rorrkonn@(protected)> skrev den Mon, 23 May 2005 00:05:38 -0400:
> If Nurbs where better,faster then Polygons I would use Nurbs.
It is because nurbs are better and faster than polyhedrons,
that is why I use them. The difference is that you model other kinds
of objects than I do, and we have been training each our kind of
modelling.
Go try to make a boat hull, like the one I have linked to before,
http://www.caligari.com/products/trueSpace/ts5/Courses/nurbsdesign.asp?Cate
=Master
as quick, intiutive and exact with polyhedrons!!
The only limitation with nurbs is that it is not implemented all the
way in trueSpace, lacking a lot of functions available for polyhedrons.
But that is a tS limitation, not a nurbs limitation.
- Hans
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