Nurbs -

Nader Belal · ‎2018-04-09

Hi everyone,

I was trying to take an adventures step to understand nurbs GDL commands, but then I found out that the GDL manual is pretty confusing ... so here goes my questions:

1- Nurbssurface

degree_u: degree of surface in the u parameter direction
degree_v: degree of surface in the v parameter direction
nu, nv: number of control points in u and v directions, greater than degree (not less than order) of then surface in given direction

a- I understand the concept of U,V & W, but how many Knot points in UV must I use to define correctly a nurbs surface ?
b- Suppose that the surface is a rectangular shape with a slight curve, does this mean I have to take 4 points :
(0,0), (0,1), (1,1), (1,0)?

A good friend of mine have once told me that I´m so brute that I´m capable of creating a GDL script capable of creating GDLs.

Nader Belal · ‎2018-04-18

Thank you, with that I can continue my way

A good friend of mine have once told me that I´m so brute that I´m capable of creating a GDL script capable of creating GDLs.

Nader Belal · ‎2018-04-18

@poco2013

well I started from zero, and I saw another problem, that I although my code was correct using Nurbscurve2D & Nurbscurve3d was correct, it always gave me a error that I have missing parameters.

And now I know why

ArchiCAD uses OpenGL nurbs
Rhino uses openNurbs nurbs

so as long you're aware of the differences, you will get to where you want to go

A good friend of mine have once told me that I´m so brute that I´m capable of creating a GDL script capable of creating GDLs.

Nurbs -

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