[vtkusers] Adding points dynamically

[Grzegorz Pytel]

I have following variables:


I want to have points added dynamically on mouse click event and force the
gaussian filter to create surface out of modified points and have it
displayed. The commands like splatMapper->Update() or contour->Update() do
not take effect. How should I force GaussianSplatter to recompute surface
and redraw?

I store points in points like this:


vtkPoints * points;
vtkCellArray * vertices;
vtkGaussianSplatter * splatter;
vtkPolyData * pData;
pData = vtkPolyData::New();
    pData->SetPoints(points);
    pData->SetVerts(vertices);

I use my own function that returns pointer to GaussianSplatter:
vtkGaussianSplatter* GetGaussianSplatter() { return splatter }
My filters I have set up as following:

vtkContourFilter * contour;
    vtkPolyDataMapper *splatMapper;

contour = vtkContourFilter::New();

contour->SetInputConnection(this->sculpture->GetGaussianSplatter()->GetOutputPort());
    contour->SetValue(0, 0.9);
    //contour->SetInput(sculpture->GetGaussianSplatter()->GetOutput());

    splatMapper = vtkPolyDataMapper::New();
    splatMapper->SetInput(contour->GetOutput());

    splatActor = vtkActor::New();
    splatActor->SetMapper(splatMapper);
    renderer->AddActor(splatActor);

This code does not work properly I have on mouse left down event:

for(int i=0;i<1000;i++)
    {
        double np[3];
        np[0] = rand()/RAND_MAX;
        np[1] = rand()/RAND_MAX;
        np[2] = rand()/RAND_MAX;
        sculpture->AddPoint(np);
    }

void Sculpture::AddPoint(double point[])
{
    this->points->InsertNextPoint(point);
    this->vertices->InsertNextCell(1);
    this->vertices->InsertCellPoint(0);
}


Thanks in advance,
Gregory
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