[vtkusers] Move arrow in the direction of point normal

[Alex Malyushytskyy]

Please reply to mailing list.
It will help first of all you,

"Tbe object can be any thing like vtkpolydata or vtkarrowsorce or
vtkcylindersource"

All sources you mention produce vtkPolydata, so
have you looked at
http://www.vtk.org/Wiki/VTK/Examples/Cxx/Filters/TransformPolyData
I've suggested you to check?

I believe it covers all technical questions how to apply transformation in
vtk,
Everything else is trivial math. It is easy to determine how to find
distance between 2 points and angle between 2 vectors, which you would need
to do to define transformation for the polydata to orient it in normal
direction and place at point location.

Alex



On Thu, Apr 25, 2013 at 9:41 PM, Arindam <arindam at triassicsolutions.com>wrote:

>  Thanks for your reply. Tbe object can be any thing like vtkpolydata or
> vtkarrowsorce or vtkcylindersource.For reference i am attaching 3 image
> with this email.
>
>
> On 4/26/2013 6:17 AM, Alex Malyushytskyy wrote:
>
>   Correctly asked question is 50% of the answer.
>  Your question does not provide details on which data types your are
> working with.
>  There is no such class in vtk as ArrowObject.
>
>  If you work with vtkPolyData which represent your arrow, you need to
> define transformation which will  adjust orientation of your polydata and
> translate it to desired location.
>
>  Useful example might be:
>
> http://www.vtk.org/Wiki/VTK/Examples/Cxx/Filters/TransformPolyData
>
>
>
>  On Tue, Apr 23, 2013 at 10:17 PM, Arindam <arindam at triassicsolutions.com>wrote:
>
>>
>> Hi,
>>
>> I have point and a ArrowObject.I need to move the object to the point on
>> a 3D surface  and with the direction of the point normal.Means the arrow
>> should point to the point at the direction of the normal of the given
>> point.How can i achieve that?Any help will be appreciated.
>>
>>
>> --
>> Thanks.
>> Arindam
>>
>>
>>
>>
>>
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>
>
> --
>
>    Regards,
> *ARINDAM SAHA
> Software Engineer*
> Triassic Solutions Pvt. Ltd.
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