在我的项目中,我有一个目标文件。我需要将目标文件转换为图像。任何人都可以帮我编写代码,以便我可以转换为图像。我正在使用 VTK、qt 和 c++。
听起来你想将 OBJ 渲染到图像上。您可以查看屏幕截图示例以了解如何执行此操作:
https://examples.vtk.org/site/Cxx/Utilities/Screenshot/
这是该示例的代码:
#include <vtkActor.h>
#include <vtkNamedColors.h>
#include <vtkNew.h>
#include <vtkPNGWriter.h>
#include <vtkPolyDataMapper.h>
#include <vtkProperty.h>
#include <vtkRenderWindow.h>
#include <vtkRenderWindowInteractor.h>
#include <vtkRenderer.h>
#include <vtkSphereSource.h>
#include <vtkVersion.h>
#include <vtkWindowToImageFilter.h>
int main(int, char*[])
{
vtkNew<vtkNamedColors> colors;
vtkNew<vtkSphereSource> sphereSource;
sphereSource->SetCenter(0.0, 0.0, 0.0);
sphereSource->SetRadius(5.0);
sphereSource->SetPhiResolution(30);
sphereSource->SetThetaResolution(30);
sphereSource->Update();
// Visualize
vtkNew<vtkPolyDataMapper> mapper;
mapper->SetInputConnection(sphereSource->GetOutputPort());
vtkNew<vtkActor> actor;
actor->SetMapper(mapper);
actor->GetProperty()->SetColor(colors->GetColor3d("IndianRed").GetData());
vtkNew<vtkRenderer> renderer;
vtkNew<vtkRenderWindow> renderWindow;
renderWindow->AddRenderer(renderer);
renderWindow->SetAlphaBitPlanes(1); // enable usage of alpha channel
renderWindow->SetWindowName("Screenshot");
vtkNew<vtkRenderWindowInteractor> renderWindowInteractor;
renderWindowInteractor->SetRenderWindow(renderWindow);
renderer->AddActor(actor);
renderer->SetBackground(colors->GetColor3d("MistyRose").GetData());
renderWindow->Render();
// Screenshot
vtkNew<vtkWindowToImageFilter> windowToImageFilter;
windowToImageFilter->SetInput(renderWindow);
#if VTK_MAJOR_VERSION >= 8 || VTK_MAJOR_VERSION == 8 && VTK_MINOR_VERSION >= 90
windowToImageFilter->SetScale(2); // image quality
#else
windowToImageFilter->SetMagnification(2); // image quality
#endif
windowToImageFilter->SetInputBufferTypeToRGBA(); // also record the alpha
// (transparency) channel
windowToImageFilter->ReadFrontBufferOff(); // read from the back buffer
windowToImageFilter->Update();
vtkNew<vtkPNGWriter> writer;
writer->SetFileName("screenshot2.png");
writer->SetInputConnection(windowToImageFilter->GetOutputPort());
writer->Write();
renderWindow->Render();
renderer->ResetCamera();
renderWindow->Render();
renderWindowInteractor->Start();
return EXIT_SUCCESS;
}
您可能必须设置相机才能获得您想要的视点。