[vtkusers] recovering the Polydata

[Giancarlo Amati]

That's what I do:

void setDataset(vtkPolyData *pd) {
        _dataset = vtkPolyData::SafeDownCast(pd);
        _dataset->Update();
    }

vtkSmartPointer<vtkActor> tmpAct = mv_actors.front();

    if (tmpAct->GetMapper()->IsA("vtkPolyDataMapper")) {
        vtkPolyDataMapper *tmpPD = vtkPolyDataMapper::SafeDownCast(tmpAct->GetMapper());
        mp_windImg->setDataset(tmpPD->GetInput());
    }

where setData is member function of mp_windImg.

GC.

From: robbie.banks at gmail.com
To: darshanpai at gmail.com
Date: Tue, 22 Jun 2010 09:01:14 -0700
CC: vtkusers at vtk.org
Subject: Re: [vtkusers] recovering the Polydata

To get polydata you will have to safe downcast, I,e.
Vtkploydata::safedowncast(actor->GetMapper()->GetInput())
I think

On Jun 22, 2010, at 8:20 AM, Darshan Pai <darshanpai at gmail.com> wrote:

I am just wondering , maybe I am wrong, but if you delete the Input then Actor->GetMapper()->GetInput() should fail . Maybe that is your error here ?

On Tue, Jun 22, 2010 at 10:59 AM, Jothy <jothybasu at gmail.com> wrote:

Actor.Getmapper()->GetInput() work well for me.

Verify your input


Jothy

On Tue, Jun 22, 2010 at 3:44 PM, Giancarlo Amati <ilferraresebono at hotmail.it> wrote:







Hello everybody,

I am trying to retrieve the polydata linked to a particular actor. I have my actor saved in a list
I used the "GetMapper" function to get the pointer to a vtkMapper * and the I used


the function "IsA" to test if it is a vtkPolyDataMapper.
The IsA function returns true and I used

vtkPolyData *pd = mapper->GetInput();

to retrieve the polydata, but somehow I don't get anything reasonable and the number of vertices is 0.



is that the right way to retrieve a polydata from the pipeline?

Many thanks.
Giancarlo
 		 	   		  
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