[vtkusers] visualizing NURBS++ surfaces (maybe a FAQ??)
faco1976 at gmail.com
Tue Aug 23 12:11:45 EDT 2011
Hi Bryn, thank you for your message.
NURBS++ has a function that provide the triangulated surface, but it's
very slow, it recomputes the triangles mesh everytime I call it.
I have to investigate in a deeper way if NURBS++ provides direct access
to the rendered triangles/quads (I fear that it uses the gluNurbsSurface
functions, without create them explicitely)
> Hi Giancarlo
> It looks like the class vtkExplicitCell is abstract and there seems to
> be no child classes VTK. I haven’t used it (subclassed), so cannot
> help there.
> Maybe the NURBS++ library can also output triangles or quads (it
> manages to generate them for OpenGL rendering, so they exist somewhere).
> Then you could fill a vtkPolyData with these triangles/polygons and
> render as usual with VTK.
> Good luck
> *From:* vtkusers-bounces at vtk.org [mailto:vtkusers-bounces at vtk.org] *On
> Behalf Of *Giancarlo Facoetti
> *Sent:* Tuesday, August 23, 2011 9:55 AM
> *To:* vtkusers at vtk.org
> *Subject:* [vtkusers] visualizing NURBS++ surfaces (maybe a FAQ??)
> Hi everybody,
> I'm using an open source library for NURBS management, called NURBS++.
> I'm able to do everything: creation of the surface, control points
> moving, surface points moving, visualiation of the surface with OpenGL
> I'm developing a VTK based application, and now I need to visualize
> the NURBS++ surfaces into VTK pipeline, therefore without using
> gluNurbsSurface but the VTK rendering
> I found in the VTK documentation the class vtkExplicitCell.h that
> tells about NURBS surfaces, but I didn't understand how to use it.
> Do you have some suggestion please?
> thank you!
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