[vtkusers] Getting density values through a normal vector

[tony hakki]

Hi Obada;
first of all I want to thank for your attention.  I have a 3D .raw data and It has some blur on surface. I would like implement surface detection.  like that: I will have normal vector of points and I will get density values through the normal vector. and then I will calculate the derivative  of density values;at the end maximum point will indicate the surface point. This is what I want to do. 
I attached a sample image that it says everything which I have tried to say.
A picture worths many sentence...
Tony

----- Original Message ----
From: Obada Mahdi <omahdi at gmx.de>
To: tony hakki <tony2007vtk at yahoo.com>
Cc: vtkusers at vtk.org
Sent: Wednesday, February 28, 2007 1:17:06 PM
Subject: Re: [vtkusers] Getting density values through a normal vector


Hi Tony!

On 2/26/07, tony hakki <tony2007vtk at yahoo.com> wrote:
> how can I get the density values with fixed width step through a Normal
> Vector using vtk classes. I have computed normal vectors of a surface so
> far.

Is your question related to your posting "Normal of a point"
http://public.kitware.com/pipermail/vtkusers/2006-December/088603.html
from 12/10/2006?  If so, I would still recommend to have a look the
the classes I mentioned in my reply (vtkWarpScalars and
vtkProbeFilter):
http://public.kitware.com/pipermail/vtkusers/2006-December/088642.html

Are you looking for something different, or do you need help with these classes?

If you only need to evaluate scalars at one point at a time, you could
also generate a vtkLineSource starting at a given point, orient it
along the point normal, set up length and resolution appropriately and
feed that into vtkProbeFilter for evaluation.


HTH,

Obada


 
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