[vtkusers] vtkCutter->Update doesn't update the vtkCutter->GetOutput()

[Nicolas Sarrasin]

Thanks for your reply,

but i still have the same result.

To force the update I have to use a temporary vtkPolyData with deepcopy 
such as :

for(int step=0; step<nbsteps; step++)
{
        cutter->Update();

        vtkPolyData* tmp = vtkpolyData::New();
        tmp->DeepCopy( cutter->GetOutput() );

        vtkAppendpolyData->AddInput( tmp ); //here it's updated

But it's increase the time of execution and I'd like to optimize it as 
much as possible.

I thought Update() was called everytime GetOutput() was called, isn't it 
the case ?


Le 02/11/2010 15:42, Jothy a écrit :
> I think you need to update the plane "Origin" as well by 
> plane->Setorigin(x,x,x).
>
> Jothy
>
> On Tue, Nov 2, 2010 at 1:35 PM, nsarrasin 
> <nsarrasin at phenix-systems.com <mailto:nsarrasin at phenix-systems.com>> 
> wrote:
>
>
>     Hi all,
>
>     Why the output of vtkCutter isn't update when I do Update()?
>     I always get the same slice (the first to be compute).
>
>
>     cutter->SetInput(polydata);
>     cutter->SetCutFunction(plane);
>
>     for(int step=0; step<nbsteps; step++)
>     {
>            cutter->Update();
>            vtkAppendpolyData->AddInput( cutter->GetOutput() ); //here
>     it's not updated
>     !!!
>
>            //rotation of the plane normal
>            vtkMatrix4x4->MultiplyPoint(plane->GetNormal(), new_normal);
>
>            //update the plane
>            plane->SetNormal(new_normal);
>     }
>
>     Thanks for explaining me.
>
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