[vtkusers] VTKProbeFilter

[John Biddiscombe]

One approach might be to create a tube implicit function (you'd have to
write some code) that lay along the line you wish to do the probing - then
intersect this with your points. You could vary the width of the tube
depending upon the density of your points. Then you can use the output of
the intersection as the search space for your interpolation.

just a thought!

JB


----- Original Message -----
From: "Louis-Jacques Lalonde" <lalond01 at gel.ulaval.ca>
To: <vtkusers at public.kitware.com>
Sent: Thursday, November 07, 2002 1:16 PM
Subject: [vtkusers] VTKProbeFilter


> Hi !
>
> I'm using vtkProbefilter with a polydata of points as a source and a
> line as the input.  Like someone said here
>
> http://public.kitware.com/pipermail/]/2000-October/004532.html
>
> the output of the vtkProbefilter is zero or black in RGB if you use a
> points-only data set.  Someone knows an easy way to solve this ?  I have
> large polydata, around 500-600k points  and I have 200-300 points on my
> line that I want to interpolate.  I need to do some kind if
> interpolation for the points I choose on my line.
>  I don't want to choose an interpolation method that takes too long.  It
> is possible for example to get N scalairs value in my polydata  around
> the point where I am (in the line) and do a mean of these value ?  How
> can I do that without searching in all my polydata ?
>
> If anyone modified the vtkprobefilter code do solve this problem, I
> would be very happy to contact him/her.
>
> Thanks !
>
> Louis-Jacques
>