[vtkusers] Delete point from PolyData

[meakcey]

I am working on a polydata which includes points, normals, colors and ids.
I have managed that by reading point cloud data like below

pcl::PointCloud<pcl::PointNormal>::Ptr pointCloud(new
pcl::PointCloud<pcl::PointNormal>);
pcl::io::loadPLYFile("sample.ply", *pointCloud);

vtkSmartPointer<vtkPoints> points = vtkSmartPointer<vtkPoints>::New();
vtkSmartPointer<vtkUnsignedCharArray> colors =
vtkSmartPointer<vtkUnsignedCharArray>::New();
colors->SetNumberOfComponents(3);
colors->SetName ("Colors");

// Set point normals
vtkSmartPointer<vtkDoubleArray> pointNormalsArray =
vtkSmartPointer<vtkDoubleArray>::New();
pointNormalsArray->SetNumberOfComponents(3); //3d normals (ie x,y,z)
pointNormalsArray->SetName("Normals");

vtkSmartPointer<vtkIdTypeArray> pointIds =
vtkSmartPointer<vtkIdTypeArray>::New();
pointIds->SetNumberOfComponents(1);
pointIds->SetName("pointIds");

unsigned char tmpColor[3] = {200, 200, 100};
for(unsigned int i=0; i<pointCloud->size(); i++){
    points->InsertNextPoint(pointCloud->points[i].x,
pointCloud->points[i].y, pointCloud->points[i].z);
    double pn[3] = {pointCloud->points[i].normal_x,
pointCloud->points[i].normal_y, pointCloud->points[i].normal_z};
    pointNormalsArray->InsertNextTypedTuple(pn);
    colors->InsertNextTypedTuple(tmpColor);
    pointIds->InsertNextValue(i);
}

vtkSmartPointer<vtkPolyData> pointsPoly =
vtkSmartPointer<vtkPolyData>::New();
pointsPoly->SetPoints(points);

vtkSmartPointer<vtkVertexGlyphFilter> vertexFilter =
vtkSmartPointer<vtkVertexGlyphFilter>::New();
vertexFilter->SetInputConnection(idFilter->GetOutputPort());
vertexFilter->SetInputData(pointsPoly);
vertexFilter->Update();

vtkPointCloud = vtkSmartPointer<vtkPolyData>::New();
vtkPointCloud ->ShallowCopy(vertexFilter->GetOutput());
vtkPointCloud ->GetPointData()->SetScalars(colors);
vtkPointCloud ->GetPointData()->SetNormals(pointNormalsArray);
vtkPointCloud ->GetPointData()->AddArray(pointIds);

    
I am able to render this created polydata and can select areas by getting
know ids and so on.
Now I want to some of the points from this set with code below but it is
getting crashed.

for(unsigned int j=20; j<30; j++){
vPointCloud->DeletePoint(j);
}
sceneActor->Modified();


How can delete points referring to ids assigned?



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