Hi,
I’m using vtkCutter to cut my 3d model(vtkPolydata). Through this I get a cutter surface. Now I want to calculate the area of the surface. Here is a part of my code:
vtkSmartPointer<vtkCutter> Cutter = vtkSmartPointer<vtkCutter>::New();
Cutter->SetInputData(m_PD);
CutterPlane->SetOrigin(Origin[0], Origin[1], Origin[2]);
CutterPlane->SetNormal(Nx, Ny, Nz);
Cutter->SetCutFunction(CutterPlane.Get());
Cutter->GenerateCutScalarsOff();
Cutter->Update();
vtkPolyData* cutpd = vtkPolyData::New();
cutpd->DeepCopy(Cutter->GetOutput());
vtkSmartPointer<vtkTriangleFilter> triangles = vtkSmartPointer<vtkTriangleFilter>::New();
triangles->SetInputData(cutpd);
triangles->Update();
auto nums = triangles->GetOutput()->GetNumberOfPoints();
vtkSmartPointer<vtkMassProperties> massProp = vtkSmartPointer<vtkMassProperties>::New();
massProp->SetInputData(triangles->GetOutput());
double area = massProp->GetSurfaceArea();
The program reports an error in the last code sentence：
vtkMassProperties (000001D12CD995E0): Input data type must be VTK_TRIANGLE not 3