VTK 实例35：图像运算（逻辑运算）

  1 #include "vtkAutoInit.h" 
  2 VTK_MODULE_INIT(vtkRenderingOpenGL2);
  3 VTK_MODULE_INIT(vtkInteractionStyle);
  4 
  5 #include <vtkSmartPointer.h>
  6 #include <vtkMath.h>
  7 #include <vtkImageData.h>
  8 #include <vtkImageCanvasSource2D.h>
  9 #include <vtkImageLogic.h>
 10 #include <vtkRenderWindow.h>
 11 #include <vtkRenderWindowInteractor.h>
 12 #include <vtkInteractorStyleImage.h>
 13 #include <vtkRenderer.h>
 14 #include <vtkImageActor.h>
 15 
 16 int main(int, char *[])
 17 {
 18     vtkSmartPointer<vtkImageCanvasSource2D> imageSource1 =
 19         vtkSmartPointer<vtkImageCanvasSource2D>::New();
 20     imageSource1->SetScalarTypeToUnsignedChar();
 21     imageSource1->SetNumberOfScalarComponents(1);
 22     imageSource1->SetExtent(0, 100, 0, 100, 0, 0);
 23     imageSource1->SetDrawColor(0.0);
 24     imageSource1->FillBox(0,100,0,100);
 25     imageSource1->SetDrawColor(255);
 26     imageSource1->FillBox(20,60,20,60);
 27     imageSource1->Update();
 28 
 29     vtkSmartPointer<vtkImageCanvasSource2D> imageSource2 = 
 30         vtkSmartPointer<vtkImageCanvasSource2D>::New();
 31     imageSource2->SetNumberOfScalarComponents(1);
 32     imageSource2->SetScalarTypeToUnsignedChar();
 33     imageSource2->SetExtent(0, 100, 0, 100, 0, 0);
 34     imageSource2->SetDrawColor(0.0);
 35     imageSource2->FillBox(0,100,0,100);
 36     imageSource2->SetDrawColor(255.0);
 37     imageSource2->FillBox(40,80,40,80);
 38     imageSource2->Update();
 39 
 40     vtkSmartPointer<vtkImageLogic> imageLogic = 
 41         vtkSmartPointer<vtkImageLogic>::New();
 42     imageLogic->SetInputData(imageSource1->GetOutput());
 43     imageLogic->SetInputData(imageSource2->GetOutput());
 44     imageLogic->SetOperationToXor();
 45     imageLogic->SetOutputTrueValue(128);
 46     imageLogic->Update();
 47 
 48     vtkSmartPointer<vtkImageActor> originalActor1 =
 49         vtkSmartPointer<vtkImageActor>::New();
 50     originalActor1->SetInputData(imageSource1->GetOutput());
 51 
 52     vtkSmartPointer<vtkImageActor> originalActor2 =
 53         vtkSmartPointer<vtkImageActor>::New();
 54     originalActor2->SetInputData(imageSource2->GetOutput());
 55 
 56     vtkSmartPointer<vtkImageActor> logicActor =
 57         vtkSmartPointer<vtkImageActor>::New();
 58     logicActor->SetInputData(imageLogic->GetOutput());
 59 
 60     double leftViewport[4] = {0.0, 0.0, 0.33, 1.0};
 61     double midViewport[4] = {0.33, 0.0, 0.66, 1.0};
 62     double rightViewport[4] = {0.66, 0.0, 1.0, 1.0};
 63 
 64     vtkSmartPointer<vtkRenderer> originalRenderer1 =
 65         vtkSmartPointer<vtkRenderer>::New();
 66     originalRenderer1->SetViewport(leftViewport);
 67     originalRenderer1->AddActor(originalActor1);
 68     originalRenderer1->ResetCamera();
 69     originalRenderer1->SetBackground(1.0, 1.0, 1.0);
 70 
 71     vtkSmartPointer<vtkRenderer> originalRenderer2 =
 72         vtkSmartPointer<vtkRenderer>::New();
 73     originalRenderer2->SetViewport(midViewport);
 74     originalRenderer2->AddActor(originalActor2);
 75     originalRenderer2->ResetCamera();
 76     originalRenderer2->SetBackground(0.8, 0.8, 0.8);
 77 
 78     vtkSmartPointer<vtkRenderer> logicRenderer =
 79         vtkSmartPointer<vtkRenderer>::New();
 80     logicRenderer->SetViewport(rightViewport);
 81     logicRenderer->AddActor(logicActor);
 82     logicRenderer->ResetCamera();
 83     logicRenderer->SetBackground(0.6, 0.6, 0.6);
 84 
 85     vtkSmartPointer<vtkRenderWindow> renderWindow =
 86         vtkSmartPointer<vtkRenderWindow>::New();
 87     renderWindow->AddRenderer(originalRenderer1);
 88     renderWindow->AddRenderer(originalRenderer2);
 89     renderWindow->AddRenderer(logicRenderer);
 90     renderWindow->SetSize(640, 320);
 91     renderWindow->Render();
 92     renderWindow->SetWindowName("ImageLogicExample");
 93 
 94     vtkSmartPointer<vtkRenderWindowInteractor> renderWindowInteractor =
 95         vtkSmartPointer<vtkRenderWindowInteractor>::New();
 96     vtkSmartPointer<vtkInteractorStyleImage> style =
 97         vtkSmartPointer<vtkInteractorStyleImage>::New();
 98 
 99     renderWindowInteractor->SetInteractorStyle(style);
100     renderWindowInteractor->SetRenderWindow(renderWindow);
101     renderWindowInteractor->Initialize();
102     renderWindowInteractor->Start();
103 
104     return EXIT_SUCCESS;
105 }