VTK渲染 灰度图的像素值曲面点图

效果如下：

 

 

 

 

代码如下：

double leftview[4] = {0,0, 0.5,1};
//    double midview[4] = {0.33,0, 0.66,1};
    double rightview[4] = {0.5,0, 1.0,1};
    vtkSmartPointer<vtkJPEGReader> reader = vtkSmartPointer<vtkJPEGReader>::New();
    reader->SetFileName("d:/lena.jpg");
    reader->Update();
    vtkSmartPointer<vtkImageLuminance> lum = vtkSmartPointer<vtkImageLuminance>::New();
    lum->SetInputConnection(reader->GetOutputPort());
    lum->Update();
    vtkImageData* idata = lum->GetOutput();
    int ndims[3] = {0};
    idata->GetDimensions(ndims);
    vtkSmartPointer<vtkPoints> points = vtkSmartPointer<vtkPoints>::New();
    vtkSmartPointer<vtkCellArray> cells = vtkSmartPointer<vtkCellArray>::New();
    vtkIdType idtype;
    qDebug() <<ndims[0] <<ndims[1] <<ndims[2];
    for(int x = 0; x < ndims[0]; x++){
        for(int y = 0; y < ndims[1]; y++){
            uchar* pixel = (uchar*)idata->GetScalarPointer(x,y,0);
            idtype = points->InsertNextPoint(x, y, *pixel);
            cells->InsertNextCell(1, &idtype);
        }
    }
    vtkSmartPointer<vtkPolyData> poly = vtkSmartPointer<vtkPolyData>::New();
    poly->SetPoints(points);
    poly->SetVerts(cells);
    vtkSmartPointer<vtkPolyDataMapper> mapper = vtkSmartPointer<vtkPolyDataMapper>::New();
    mapper->SetInputData(poly);
    vtkSmartPointer<vtkActor> actor = vtkSmartPointer<vtkActor>::New();
    actor->SetMapper(mapper);

    vtkSmartPointer<vtkImageActor> actor1 = vtkSmartPointer<vtkImageActor>::New();
    actor1->SetInputData(lum->GetOutput());
    vtkSmartPointer<vtkRenderer> render = vtkSmartPointer<vtkRenderer>::New();
    render->AddActor(actor1);
    render->SetViewport(leftview);

    vtkSmartPointer<vtkRenderer> render2 = vtkSmartPointer<vtkRenderer>::New();
    render2->AddActor(actor);
    render2->SetViewport(rightview);

    pRenderWindow->AddRenderer(render);
    pRenderWindow->AddRenderer(render2);
    pRenderer = render;