vtk實戰(三十五)——讀取結構化格網數據

#include <vtkSmartPointer.h>
#include <vtkPolyDataMapper.h>
#include <vtkStructuredGridReader.h>
#include <vtkStructuredGridGeometryFilter.h>
#include <vtkRenderWindow.h>
#include <vtkRenderWindowInteractor.h>
#include <vtkRenderer.h>

int main()
{
    std::string inputFilename = "SampleStructGrid.vtk";

    vtkSmartPointer<vtkStructuredGridReader> reader =
        vtkSmartPointer<vtkStructuredGridReader>::New();
    reader->SetFileName(inputFilename.c_str());
    reader->Update();

    vtkSmartPointer<vtkStructuredGridGeometryFilter> geometryFilter =
        vtkSmartPointer<vtkStructuredGridGeometryFilter>::New();
    geometryFilter->SetInputConnection(reader->GetOutputPort());
    geometryFilter->Update();

    vtkSmartPointer<vtkPolyDataMapper> mapper =
        vtkSmartPointer<vtkPolyDataMapper>::New();
    mapper->SetInputConnection(geometryFilter->GetOutputPort());

    vtkSmartPointer<vtkActor> actor =
        vtkSmartPointer<vtkActor>::New();
    actor->SetMapper(mapper);

    vtkSmartPointer<vtkRenderer> renderer =
        vtkSmartPointer<vtkRenderer>::New();
    vtkSmartPointer<vtkRenderWindow> renderWindow =
        vtkSmartPointer<vtkRenderWindow>::New();
    renderWindow->AddRenderer(renderer);
    vtkSmartPointer<vtkRenderWindowInteractor> renderWindowInteractor =
        vtkSmartPointer<vtkRenderWindowInteractor>::New();
    renderWindowInteractor->SetRenderWindow(renderWindow);

    renderer->AddActor(actor);
    renderer->SetBackground(.3, .6, .3); 

    renderWindow->Render();
    renderWindowInteractor->Start();

    return 0;
}