[vtkusers] vtkVisibleCellSelector and vtk 6.2

[Ahmet Doğan]

is there any way to make hidden line like in the picture with vtk?
http://wheger.tripod.com/vhl/bmc.gif

On 21.05.2014 10:55, Ahmet Doğan wrote:
> On 21.05.2014 04:38, David E DeMarle wrote:
>>
>>
>> On Tuesday, May 20, 2014, Ahmet Doğan <isimtic at gmail.com 
>> <mailto:isimtic at gmail.com>> wrote:
>>
>>     frustum behaves like box clip doesn't it?
>>
>>
>> There are differences, but yes very similar.
>>
>>      I just need to extract cells by user view or like xy xz yz axis.
>>     like taking picture I don't need behind of dataset how can it be
>>     done? not possible with vtk?
>>
>>
>> I'ld love to be proven wrong but I don't think so, not in all cases. 
>> It boils down to occlusion culling.
>>
>> Zooming lessens the pixel resolution problem in scan conversion or 
>> ray casting, but isn't perfect.
>>
>> Extract surface into normal generation into frustum dotted with view 
>> vector and cull the non negative results is close but it will get 
>> some corner cases wrong too. It isn't resolution dependent at least.
>>
> what is that exactly because I need it just take a picture of an 
> object from one side to put it 2d drawing that way ,there wont be 
> edge. is there any example how can i do what you mean in vtk?
>> I'ld like to hear about any other solutions out there since the 
>> question comes up every once in a while.
>>
>>
>>     On 21.05.2014 03:54, David E DeMarle wrote:
>>
>>>     Not much. It is a limitation of the screen space algorithm whch
>>>     can pick at most one cell per pixel.
>>>
>>>     Frustum selection is an object space algorithm and doesn't have
>>>     the same limitation, but it can not cull occluded cells.
>>>
>>>     On Tuesday, May 20, 2014, Ahmet Doğan <isimtic at gmail.com
>>>     <javascript:_e(%7B%7D,'cvml','isimtic at gmail.com');>> wrote:
>>>
>>>
>>>         On 21.05.2014 03:21, Ahmet Doğan wrote:
>>>
>>>             On 21.05.2014 03:12, Ahmet Doğan wrote:
>>>
>>>                 with vtkHardwareSelector cells are changing on
>>>                 zooming How can I disable it.
>>>
>>>                 Please check the image I added
>>>
>>>                 thank you
>>>
>>>
>>>                 On 20.05.2014 21:18, Bill Lorensen wrote:
>>>
>>>                     It has been replaced by vtkHardwareSelector
>>>
>>>
>>>                     On Tue, May 20, 2014 at 2:01 PM, Ahmet Doğan
>>>                     <isimtic at gmail.com> wrote:
>>>
>>>                         hi,
>>>
>>>                         What's happened vtkVisibleCellSelector in
>>>                         vtk 6 and up. I cant see any
>>>                         information on migrate page
>>>
>>>                         Kind regards.
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>>>
>>>     -- 
>>>     David E DeMarle
>>>     Kitware, Inc.
>>>     R&D Engineer
>>>     21 Corporate Drive
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>>>     Phone: 518-881-4909
>>
>>
>>
>> -- 
>> David E DeMarle
>> Kitware, Inc.
>> R&D Engineer
>> 21 Corporate Drive
>> Clifton Park, NY 12065-8662
>> Phone: 518-881-4909
>

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