[vtkusers] Trying to perform boolean union between more than two polydatas

[reaper84]

I tested that idea and it works fine but when I'm trying to make a loop and
perform union multiple times on the same function whole code breaks :/. This
is part of my code:

 vtkSmartPointer<vtkBooleanOperationPolyDataFilter> booleanOperation =
vtkSmartPointer<vtkBooleanOperationPolyDataFilter>::New();
 booleanOperation->SetOperationToUnion();
 vtkSmartPointer<vtkBooleanOperationPolyDataFilter> booleanOperation1 =
vtkSmartPointer<vtkBooleanOperationPolyDataFilter>::New();
 booleanOperation1->SetOperationToUnion();

int count_boolean = 0;
.
.
some loop
{
.
.
 triangle->SetInput(tuber->GetOutput()); //this gives me another poly to add
to union

       if (count_boolean ==
0){booleanOperation->AddInput(0,triangle->GetOutput());}
       else if (count_boolean ==
1){booleanOperation->AddInput(1,triangle->GetOutput());}
       else if (count_boolean ==
2){booleanOperation1->AddInput(0,booleanOperation->GetOutput());
                                             
booleanOperation1->AddInput(1,triangle->GetOutput());}
       else
           {
           vtkSmartPointer<vtkPolyData> boolCopy =
vtkSmartPointer<vtkPolyData>::New();
           boolCopy = booleanOperation1->GetOutput();
           boolCopy->Update();
           booleanOperation1->RemoveAllInputs();
           booleanOperation1->Update();
           booleanOperation1->AddInput(0,boolCopy);
           booleanOperation1->AddInput(1,triangle->GetOutput());
           booleanOperation1->Update();
           }
       count_boolean++;
       }

Error: vtkStreamingDemandDrivenPipeline (0x32cf8a0): Input port 0 of
algorithm vtkBooleanOperationPolyDataFilter(0x321e500) has 0 connections but
is not optional.

It seams like after removing inputs no new inputs are added...
Could somebody give me a hint? Thanks!




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