[vtkusers] How to convert a triangular syrface mesh to a depth ( range ) image ???

[Deepak Roy]

Hello David,

Thanks for the reply.

I read the doc for vtkElevationFilter (
http://www.vtk.org/doc/release/4.2/html/classvtkElevationFilter.html ).

It says it computes the projection ( probably perpendicular distance ) of
each point of my vtkPolyData onto the line.

But what would be helpful in my case is the projection onto the ( xy, yz, zx
) coordinate planes.

How do i go about doing this ?

Let us simplify the problem....... Imaging for example we have a hemisphere
vtkPolyData --- facing towards the viewer and centered at the origin ( 0 , 0
, 0 ).

Now, if i cut it with a plane "y = 0"  ---- i should get a curve -- a circle
of radius ( R ) equal to that of the hemisphere.

If i cut it with a plane "y = r / 2"  ---- i will get another circle of a
different radius.

How can i extract these contour curves ???

Thanks in advance.

Regrads,

Deepak

On 2/28/06, David E DeMarle <dave.demarle at kitware.com> wrote:
>
> It sounds like you want to run the surface through an elevation filter
> or three along each axis. Then you get the X, Y, and Z values at each
> point and to contour with.
>
> hth,
> Dave DeMarle
>
>
> Deepak Roy wrote:
>
> >
> > hello everyone,
> >
> > I have a 3d surface scan of the front side a human body.
> >
> > I want to do some analysis on the "surface contour lines" about the
> > y-axis ( the axis of symmetry for the human body ) and also the x-axis.
> >
> > Which can be done approximately by converting the surface to a depth (
> > range ) image.
> >
> > Is there an easy way to achieve this in VTK ?
> >
> > Thanks in advance.
> >
> > Regards,
> >
> > Deepak Roy
> >
> >
> >
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