[Ves] Getting Angle or XYZ Points of a Rendered 3D Object

[Pat Marion]

Typo in previous email... I meant camera view direction.

Pat

On Mon, Jan 21, 2013 at 9:58 AM, Pat Marion <pat.marion at kitware.com> wrote:

> Please re-read my previous email.  I think my suggestion to get the camera
> view directory will be helpful.
>
> Pat
>
>
> On Mon, Jan 21, 2013 at 7:09 AM, SHAMSUDHEEN TK <shamsutk87 at gmail.com>wrote:
>
>> oh.. okay thank you very much for the answer.
>>
>> Let me clarify my question in detail.
>>
>> Let take an example, I have a TeaPort.. Each portions of the TeaPort
>> representing separate views.. let say front-view , bottom-view, side-view ,
>> front -right-view, front-left-view etc...
>>
>> My aim is to display the corresponding views name in a Label while user
>> rotating the 3D TeaPort object.
>>
>> So my logic should be like this, first i will identify all the angles or
>> xyz points which is corresponding to the each separate views. example:
>> 30-40 angle will be  front-view, 60-70 will be front -right-view such on.
>>
>> When the current 3D object angles meet 30-40  degree while rotating , we
>> can easily know the TeaPort view is front-view.When angles meet 60-70 ,it
>> should be front -right-view.
>>
>> I hope you cleared my concept,
>>
>> Any good suggestions from your side to help me..
>>
>> Thanks again for your answer.
>>
>>
>>
>> On Sun, Jan 20, 2013 at 5:41 AM, Pat Marion <pat.marion at kitware.com>wrote:
>>
>>> Hi Shamsudheen,
>>>
>>> I'm not sure exactly what you're trying to get with angle, do you mean
>>> the camera angle?  When you use gestures to rotate, you are actually moving
>>> the camera, not the object.  I assume you are using vesKiwiViewerApp in
>>> your application?  This class, in the VES master branch, makes access to
>>> the renderer and camera protected function calls, so you can derive a new
>>> class and do your work there.  So to get the view direction, for example,
>>> you would call:
>>>
>>> vesCamera::Ptr camera = app->camera();
>>> vesVector3f viewDirection = camera->focalPoint() - camera->position();
>>>
>>> To get the XYZ points, again that depends on how your application is
>>> using VES.  You can get the XYZ points from a vtkPolyData object after you
>>> read data, or you can get the points from the vesGeometryData object which
>>> holds the rendering vertex arrays.
>>>
>>> You might try following some introductory VTK tutorials to become more
>>> familiar with using the VTK library:
>>>
>>> http://www.vtk.org/Wiki/VTK/Examples/Cxx
>>>
>>> Pat
>>>
>>> On Sun, Jan 20, 2013 at 5:17 PM, SHAMSUDHEEN TK <shamsutk87 at gmail.com>wrote:
>>>
>>>> Shamsudheen
>>>
>>>
>>>
>>> I'm really newbie with *VTK* and *VES*.
>>
>> I have successfully built the *VES/Kiwi* and have rendered one 3D obj
>> file in my iPad application.
>>
>> Great, I can rotate and zoom the object now using Gestures.
>>
>> *Now I would like to get the Angle or XYZ Points of a Rendered 3D Object
>> to identify the object position.*
>>
>> Is it possible? if yes, please share the details.
>>
>> Thanks,
>>
>> Shamsudheen
>>
>
>
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