需求：根据 范围（min,max） 最一个模型进行分割，提取出范围内得区域。

 实现：

利用  vtkPlane 和vtkClipPolyData 对数据进行裁剪，裁剪取剩下得部分 在进行同样的操作爹日次裁剪取裁剪掉的部分。

    //第一次分割
    vtkSmartPointer<vtkPlane> clipPlane = vtkSmartPointer<vtkPlane>::New();
    clipPlane->SetOrigin(0.0, 0.0, zMax);
    clipPlane->SetNormal(0.0,0.0,-1);

    //裁切
    vtkSmartPointer<vtkClipPolyData> clipper =  vtkSmartPointer<vtkClipPolyData>::New();
    clipper->SetGenerateClippedOutput(true);
    actor->GetMapper()->Update();
    clipper->SetInputData(actor->GetMapper()->GetInputAsDataSet());
    clipper->SetClipFunction(clipPlane);
    clipper->Update();
    clipper->InsideOutOn();


    int cellNumber1 = clipper->GetOutput()->GetNumberOfCells();
    int cellNumber2 = clipper->GetClippedOutput()->GetNumberOfCells();
    qDebug()<<"cellNumber1 " <<cellNumber1<<cellNumber2;
    if(cellNumber1==0||cellNumber2==0){
        return false;
    }

    //第二次分割
    vtkSmartPointer<vtkPlane> clipPlane2 = vtkSmartPointer<vtkPlane>::New();
    clipPlane2->SetOrigin(0.0, 0.0, zMin);
    clipPlane2->SetNormal(0.0,0.0,-1);

   

    vtkSmartPointer<vtkClipPolyData> clipper2 =  vtkSmartPointer<vtkClipPolyData>::New();
    clipper2->SetGenerateClippedOutput(true);
    clipper2->SetInputConnection(clipper->GetClippedOutputPort());
    clipper2->SetClipFunction(clipPlane2);
    clipper2->Update();
    clipper2->InsideOutOn();

    cellNumber1 = clipper2->GetOutput()->GetNumberOfCells();
    cellNumber2 = clipper2->GetClippedOutput()->GetNumberOfCells();
    qDebug()<<"cellNumber2 " <<cellNumber1<<cellNumber2;
   

    if(cellNumber1==0||cellNumber2==0){
        return false;
    }

    vtkNew<vtkPolyDataNormals> normals;
    normals->SetInputData(clipper2->GetClippedOutput());
    normals->SplittingOff();

    vtkNew<vtkWarpVector> warp;
    warp->SetInputConnection(normals->GetOutputPort());
    warp->SetInputArrayToProcess(0, 0, 0, vtkDataObject::FIELD_ASSOCIATION_POINTS, 
    vtkDataSetAttributes::NORMALS);
    warp->SetScaleFactor(0.5);
    warp->Update();

  
    vtkSmartPointer<vtkPolyDataMapper> mapperOne = 
    vtkSmartPointer<vtkPolyDataMapper>::New();
    mapperOne->SetInputConnection(warp->GetOutputPort());
    vtkSmartPointer<vtkActor> actorOne =vtkSmartPointer<vtkActor>::New();
    actorOne->SetMapper(mapperOne);
    actorOne->GetProperty()->SetColor(color.r/255.0,color.g/255.0,color.b/255.0);
    Renderer->AddActor(actorOne);