[vtkusers] creating a 3D body using unstructured grid

[Paul McGuinness]

Hi,

The link you kindly suggested isn't very useful for my particular
problem, but thank you anyway. My problem is I want to create a solid body
(a 3D body) from a surface created by 2d triangles. But to put it simply I
am
creating a sphere by defining the surface of it using triangles. But it is
just like a shell. I want the whole volume enclosed by the surface to have
a different scalar value to the volume outside the surface (e.g. density)!
Is this possible? Can someone help please?

Yours thankfully,
Paul.



On Mon, 17 May 2004, [iso-8859-1] REGAT-BARREL Aurélien wrote:

> Hi,
> Maybe this link will be useful :
> http://www.crd.ge.com/~lorensen/seg12/
> Greets.
>
> Paul McGuinness <mcguinpg at maths.tcd.ie> wrote:
>
> Hi vtk users,
>
> I am wondering if anyone can help me? Here is my problem:
> I would like to create a 3D cell from data that describes the shape of my
> body. The surface of the body is created very simpler to that of the cube
> in Cube.cxx.
> Instead of using vtkPolydata I am using vtkUnstructuredGrid. My surface is
> made up of 2D triangles (triangular facets), so at the moment the number
> of
> cells in my unstructured grid is equal to the number of triangles that
> describe my surface. But I would like to apply a density value to the
> entire body (body->GetCellData()->SetScalars(density_scalars)), but at the
> moment the cells describe the shape of my body and not the body itself.
> Is there any way to create a 3D body from an enclosed surface created by
> 2D triangles?
>
> Thanks,
> Paul.
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> Aurélien REGAT-BARREL
>
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