POV-Ray: Newsgroups: povray.advanced-users: mesh&nurbs question...: mesh&nurbs question...

POV-Ray : Newsgroups : povray.advanced-users : mesh&nurbs question... : mesh&nurbs question...		Server Time 28 Jul 2024 10:29:16 EDT (-0400)

From: LEO BOLOGNA
Date: 4 May 2006 10:00:01
Message: <web.445a0800e57eb53272071f7b0@news.povray.org>

Hello everybody,

I need to convert a NURBS in a mesh format...
My problem is that my NURBS is modeled and stored using a tool (called
xcmodel) developed and used in my university...
in this file are specified: surface degrees (2,1), the control net dimension
(10 x 4), the knot partition dimension (13 x 6) and finally the coordinates
of every control point and knot...for every control point is specifed the
weigth also..
How should I use these informations to obtain a mesh format recognized by
povray?

Thanks,
Leo



I post the content of my nurbs file:

DEGREE_U_V
       2        1
N.C.P._U_V
       10        4
KNOTS_U_V
       13        6
COORD.C.P.(X,Y,Z,W)
0.000000e+00 -4.519998e-01 0.000000e+00 1.000000e+00
-2.200000e+00 -1.200000e+00 0.000000e+00 1.000000e+00
-2.200000e+00 -1.200000e+00 -1.099995e-01 1.000000e+00
0.000000e+00 -4.519998e-01 -1.100000e-01 1.000000e+00
0.000000e+00 -4.519998e-01 0.000000e+00 1.000000e+00
2.200000e+00 -1.200000e+00 0.000000e+00 1.000000e+00
2.200000e+00 -1.200000e+00 -1.100000e-01 1.000000e+00
0.000000e+00 -4.519998e-01 -1.100000e-01 1.000000e+00
0.000000e+00 -4.519998e-01 0.000000e+00 1.000000e+00
2.200000e+00 -1.200000e+00 0.000000e+00 1.000000e+00
2.200000e+00 -1.200000e+00 -1.100000e-01 1.000000e+00
0.000000e+00 -4.519998e-01 -1.100000e-01 1.000000e+00
0.000000e+00 -4.519998e-01 0.000000e+00 1.000000e+00
2.200000e+00 1.199999e-01 0.000000e+00 1.000000e+00
2.200000e+00 1.199999e-01 -1.100000e-01 1.000000e+00
0.000000e+00 -4.519998e-01 -1.100000e-01 1.000000e+00
0.000000e+00 -4.519998e-01 0.000000e+00 1.000000e+00
2.200000e+00 1.199999e-01 0.000000e+00 1.000000e+00
2.200000e+00 1.199999e-01 -1.100000e-01 1.000000e+00
0.000000e+00 -4.519998e-01 -1.100000e-01 1.000000e+00
0.000000e+00 -4.519998e-01 0.000000e+00 1.000000e+00
3.278255e-08 5.599999e-01 0.000000e+00 1.000000e+00
3.278255e-08 5.599999e-01 -1.100000e-01 1.000000e+00
0.000000e+00 -4.519998e-01 -1.100000e-01 1.000000e+00
0.000000e+00 -4.519998e-01 0.000000e+00 1.000000e+00
-6.600000e-01 -3.200002e-01 0.000000e+00 1.000000e+00
-6.600000e-01 -3.200002e-01 -1.100000e-01 1.000000e+00
0.000000e+00 -4.519998e-01 -1.100000e-01 1.000000e+00
0.000000e+00 -4.519998e-01 0.000000e+00 1.000000e+00
-2.200000e+00 -3.200002e-01 0.000000e+00 1.000000e+00
-2.200000e+00 -3.200002e-01 -1.099998e-01 1.000000e+00
0.000000e+00 -4.519998e-01 -1.100000e-01 1.000000e+00
0.000000e+00 -4.519998e-01 0.000000e+00 1.000000e+00
-2.200000e+00 -3.200002e-01 0.000000e+00 1.000000e+00
-2.200000e+00 -3.200002e-01 -1.099998e-01 1.000000e+00
0.000000e+00 -4.519998e-01 -1.100000e-01 1.000000e+00
0.000000e+00 -4.519998e-01 0.000000e+00 1.000000e+00
-2.200000e+00 -1.200000e+00 0.000000e+00 1.000000e+00
-2.200000e+00 -1.200000e+00 -1.099995e-01 1.000000e+00
0.000000e+00 -4.519998e-01 -1.100000e-01 1.000000e+00
KNOTS_U
0.000000e+00
0.000000e+00
0.000000e+00
1.250000e-01
2.500000e-01
3.750000e-01
5.000000e-01
6.250000e-01
7.500000e-01
8.750000e-01
1.000000e+00
1.000000e+00
1.000000e+00
KNOTS_V
0.000000e+00
0.000000e+00
3.333333e-01
6.666667e-01
1.000000e+00
1.000000e+00

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