vtk 三維文字

#include <vtkSmartPointer.h>
#include <vtkVectorText.h>
#include <vtkLinearExtrusionFilter.h>
#include <vtkTriangleFilter.h>

#include <vtkDataSetMapper.h>
#include <vtkActor.h>
#include <vtkProperty.h>
#include <vtkCamera.h>
#include <vtkRenderWindow.h>
#include <vtkRenderer.h>
#include <vtkRenderWindowInteractor.h>

int main(int, char *[])
{
    // Create vector text polydata
    vtkSmartPointer<vtkVectorText> vecText =
        vtkSmartPointer<vtkVectorText>::New();
    vecText->SetText("Welcome to my blog!");

    // Apply linear extrusion
    vtkSmartPointer<vtkLinearExtrusionFilter> extrude =
        vtkSmartPointer<vtkLinearExtrusionFilter>::New();
    extrude->SetInputConnection(vecText->GetOutputPort());
    extrude->SetExtrusionTypeToNormalExtrusion();
    extrude->SetVector(0, 0, 1);// 沿文字方向擠壓
    extrude->SetScaleFactor(0.5);// 設置擠壓比例

//    //三角化
//    vtkSmartPointer<vtkTriangleFilter> triangleFilter =
//        vtkSmartPointer<vtkTriangleFilter>::New();
//    triangleFilter->SetInputConnection(extrude->GetOutputPort());

    vtkSmartPointer<vtkDataSetMapper> mapper =
        vtkSmartPointer<vtkDataSetMapper>::New();
    mapper->SetInputConnection(extrude->GetOutputPort());

    vtkSmartPointer<vtkActor> actor =
        vtkSmartPointer<vtkActor>::New();
    actor->SetMapper(mapper);
    actor->GetProperty()->SetColor(0.8900, 0.8100, 0.3400);

    vtkSmartPointer<vtkRenderWindow> renderWindow =
        vtkSmartPointer<vtkRenderWindow>::New();

    vtkSmartPointer<vtkRenderer> renderer =
        vtkSmartPointer<vtkRenderer>::New();
    renderer->SetBackground(.4, .5, .7);

    renderWindow->AddRenderer(renderer);

    renderer->AddActor(actor);

    renderer->ResetCamera();
    // Generate an interesting view
    renderer->ResetCamera();
    renderer->GetActiveCamera()->Azimuth(30);
    renderer->GetActiveCamera()->Elevation(30);
    renderer->GetActiveCamera()->Dolly(1.0);
    renderer->ResetCameraClippingRange();

    vtkSmartPointer<vtkRenderWindowInteractor> renderWindowInteractor =
        vtkSmartPointer<vtkRenderWindowInteractor>::New();
    renderWindowInteractor->SetRenderWindow(renderWindow);
    renderWindow->Render();
    renderWindowInteractor->Start();

    return EXIT_SUCCESS;
}