[vtkusers] Is it possible using VTK..??

[Darshan Pai]

If you want a classification like that then make that many different
Collections . When you run IsItemPresent() on any collection if the actor is
not available in the corresponding collection it will return a 0 . Or any
other efficient method . It is more of a  programming challenge I guess .

Yes you can make changes to the polydata . That should not be a problem .

Regards
Darshan


On Tue, Mar 9, 2010 at 3:33 AM, Rakesh Patil <rakeshthp at in.com> wrote:

> hi
>
>
> Well, that creates two more doubts in my mind... I have several types of
> data to be displayed, like, scattered xyz data, triangular mesh data, poly
> lines, polyvertex, polygons, circles etc.. So if i create a collection of
> actors, later on after picking them, how will I classify which actor
> contains what data..??
>
> Secondly, using
>
> Actor->GetMapper()->Getinput() - and you have your PolyData
>
> can i make any changes to the data in the polydata..?? For example, in the
> polyline data, i want to change the value of a particular vertex, and after
> changing this value, the change should immediately be reflected on the vtk
> window.. Can this be done..??
>
> Thanks
>
> Regards
> Rakesh Patil
>
>
> ---------- Original message ----------
> From:Darshan Pai< darshanpai at gmail.com >
> Date: 07 Mar 10 05:36:08
> Subject: Re: [vtkusers] Is it possible using VTK..??
> To: Rakesh Patil
>
> The polylines each has its own polyData which means it is mapped to a
> seperate actor I am assuming.
> So you can use a vtkActorCollection class and add these actors to the
> collection using AddProp() function
>
> Now when the CellPicker picks any PolyLine, it basically can identify the
> Prop selected using the Getprop() function
> Theis you can reference in the collection using the IsItemPresent()
> function in the vtkActorCollection class
>
> Actor->GetMapper()->Getinput() - and you have your PolyData
>
> Hope that helps
>
> Regards
> Darshan
>
> On Fri, Mar 5, 2010 at 11:10 PM, Rakesh Patil <rakeshthp at in.com> wrote:
>
>>  Hi,
>>
>>
>> I am not sure what you mean by solid boundary and soft boundary .
>> These are the property of the polyline.. A region has a boundary. That
>> boundary can be rigid boundary or a soft one through which water can pass
>> for example.. this boundary is represented using polyline.. How to keep
>> track of this property.??
>>
>>
>> But when you pick the paticular polyline , you know which prop is that by
>> say making an ActorCollection and finding the Prop in there.
>> I didnt find any example of this class. How do i use this..?? Anyways,
>> will give it a try..
>>
>>
>> CellPicker has a GetProp Function. From the Prop you can get your Data
>> back.
>> Will try this also..
>>
>> Thanks
>>
>> Regards
>> Rakesh Patil
>>
>>
>> ---------- Original message ----------
>> From:Darshan Pai< darshanpai at gmail.com >
>> Date: 06 Mar 10 01:59:42
>> Subject: Re: [vtkusers] Is it possible using VTK..??
>> To: Rakesh Patil
>>
>> I am not sure what you mean by solid boundary and soft boundary .
>>
>> But when you pick the paticular polyline , you know which prop is that by
>> say making an ActorCollection and finding the Prop in there . CellPicker has
>> a GetProp Function. From the Prop you can get your Data back.
>>
>> Regards
>> Darshan
>>
>> On Fri, Mar 5, 2010 at 10:35 AM, Rakesh Patil <rakeshthp at in.com> wrote:
>>
>>> Dear users,
>>>
>>> I'm back again with is it possible question.. I have a set of polylines..
>>> Each polyline is having its own polydata..
>>>
>>> Now i select this data using vtkCellPicker. After selecting, I need to
>>> draw a circle around this polyline. Is this possible..??
>>>
>>> Let me remind you, there are several polylines, and only one polyline is
>>> to be selected... Now the problem is after picking this polyline,
>>> how will i come to know which polyline is selected and how to get the
>>> data of that polyline..?? Secondly, this polyline defines a boundary.
>>> A solid boundary, and soft boundary.. The circle is to be drawn only if
>>> the polyline is a solid boundary. So this checking how can be done.?
>>>
>>> I have attached a sample image file how i want the output to be..
>>>
>>> Any ideas ..??
>>>
>>> Thanks
>>>
>>> Regards
>>> Rakesh Patil
>>>
>>>
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