對于VTK的配置就不說了。。。。因為這還是比較簡單的說。。。
在配置好VTK之後,在這個連結中http://www.vtk.org/Wiki/VTK/Examples/Cxx尋得一些examples。。。然後本來想簡單地copy就可以運作出結果來。。。發現簡單地拷貝是無法運作處結果。。。即使是按照上面所寫的cmake 。。。。。【我用的是編譯的VTK】,後來在實踐中發現,上述連結所下載下傳的壓縮包中,有cmake.list,便通過Cmake來進行編譯,這點與直接編譯VTK很類似。在cmake.list所在的目錄下,建立bin檔案用于放置cmake的編譯結果。
這個工程非常小,很快就配置完成,接着在CMake界面上會出現一些紅色的選項,如果沒有勾選“Advance”視圖,預設顯示出來的選項隻有兩項,分别是:CMAKE_INSTALL_PREFIX以及VTK_DIR,前一個選項我們已經知道是什麼意思,VTK_DIR這個選項就是指向編譯的VTK目錄,準确地說,這個路徑就是VTKConfig.cmake檔案所在的完整路徑。對于CMAKE_INSTALL_PREFIX這個選項預設的值都是C:\Program Files\XXX (XXX指的就是你在CMakeLists.txt裡的project(XXX)指令裡填寫的工程名字)。對于VTK_DIR,一般情況下,在你編譯完VTK以後,用CMake配置VTK的工程時,會自動找到這個路徑,如果CMake找不到,或者找到的不是你想要的VTK版本(假如你的計算機已經編譯多個版本的VTK時),可以通過“Browse Build…”按鈕選擇需要的VTK編譯路徑,或者直接輸入該路徑。
在cmake編譯的結果中,有xxx.sln的項目檔案。打開後,如下圖
按鍵盤F7鍵開始編譯工程,完成以後按F5運作。就可以将圖寫出來,同時在渲染器中渲染出視覺效果!
附帶
Cmake.list檔案:
cmake_minimum_required(VERSION 2.8)
PROJECT(WriteTIFF)
find_package(VTK REQUIRED)
include(${VTK_USE_FILE})
add_executable(WriteTIFF MACOSX_BUNDLE WriteTIFF)
if(VTK_LIBRARIES)
target_link_libraries(WriteTIFF ${VTK_LIBRARIES})
else()
target_link_libraries(WriteTIFF vtkHybrid)
endif()
源碼WriteTIFF.cxx:
#include <vtkImageData.h>
#include <vtkInteractorStyleImage.h>
#include <vtkTIFFWriter.h>
#include <vtkSmartPointer.h>
#include <vtkImageCanvasSource2D.h>
#include <vtkRenderWindow.h>
#include <vtkRenderWindowInteractor.h>
#include <vtkRenderer.h>
#include <vtkImageActor.h>
#include <vtkImageMapper3D.h>
#include <vtkTIFFReader.h>
int main(int argc, char *argv[])
{
if(argc != 2)
{
std::cout << "Required parameters: OutputFilename.tif" << std::endl;
return EXIT_FAILURE;
}
std::string filename = argv[1];
vtkSmartPointer<vtkImageCanvasSource2D> imageSource =
vtkSmartPointer<vtkImageCanvasSource2D>::New();
imageSource->SetScalarTypeToUnsignedChar();
imageSource->SetExtent(0,9,0,9,0,0);
imageSource->SetNumberOfScalarComponents(3);
imageSource->SetDrawColor(0, 0, 0, 0);
imageSource->FillBox(0,9,0,9);
imageSource->SetDrawColor(255, 0, 0, 0);
imageSource->FillBox(5,7,5,7);
imageSource->Update();
vtkSmartPointer<vtkTIFFWriter> tiffWriter =
vtkSmartPointer<vtkTIFFWriter>::New();
tiffWriter->SetFileName(filename.c_str());
tiffWriter->SetInputConnection(imageSource->GetOutputPort());
tiffWriter->Write();
// Read and display for verification
vtkSmartPointer<vtkTIFFReader> reader =
vtkSmartPointer<vtkTIFFReader>::New();
reader->SetFileName(filename.c_str());
reader->Update();
vtkSmartPointer<vtkImageActor> actor =
vtkSmartPointer<vtkImageActor>::New();
actor->GetMapper()->SetInputConnection(reader->GetOutputPort());
// Setup renderer
vtkSmartPointer<vtkRenderer> renderer =
vtkSmartPointer<vtkRenderer>::New();
renderer->AddActor(actor);
renderer->ResetCamera();
// Setup render window
vtkSmartPointer<vtkRenderWindow> renderWindow =
vtkSmartPointer<vtkRenderWindow>::New();
renderWindow->AddRenderer(renderer);
// Setup render window interactor
vtkSmartPointer<vtkRenderWindowInteractor> renderWindowInteractor =
vtkSmartPointer<vtkRenderWindowInteractor>::New();
vtkSmartPointer<vtkInteractorStyleImage> style =
vtkSmartPointer<vtkInteractorStyleImage>::New();
renderWindowInteractor->SetInteractorStyle(style);
// Render and start interaction
renderWindowInteractor->SetRenderWindow(renderWindow);
renderWindowInteractor->Initialize();
renderWindowInteractor->Start();
return EXIT_SUCCESS;
}