1 #include "vtkAutoInit.h"
2 VTK_MODULE_INIT(vtkRenderingOpenGL2);
3 VTK_MODULE_INIT(vtkInteractionStyle);
4
5 #include <vtkMath.h>
6 #include <vtkSmartPointer.h>
7 #include <vtkImageCanvasSource2D.h>
8 #include <vtkImageMathematics.h>
9 #include <vtkRenderWindow.h>
10 #include <vtkRenderWindowInteractor.h>
11 #include <vtkInteractorStyleImage.h>
12 #include <vtkRenderer.h>
13 #include <vtkImageActor.h>
14
15 int main(int, char *[])
16 {
17 vtkSmartPointer<vtkImageCanvasSource2D> imageSource =
18 vtkSmartPointer<vtkImageCanvasSource2D>::New();
19 imageSource->SetNumberOfScalarComponents(3);
20 imageSource->SetScalarTypeToUnsignedChar();
21 imageSource->SetExtent(0, 4, 0, 4, 0, 0);
22 imageSource->SetDrawColor(100.0, 0, 0);
23 imageSource->FillBox(0, 4, 0, 4);
24 imageSource->Update();
25
26 vtkSmartPointer<vtkImageMathematics> imageMath =
27 vtkSmartPointer<vtkImageMathematics>::New();
28 imageMath->SetOperationToMultiplyByK();
29 imageMath->SetConstantK(2.0);
30 imageMath->SetInputConnection(imageSource->GetOutputPort());
31 imageMath->Update();
32
33 vtkSmartPointer<vtkImageActor> originalActor =
34 vtkSmartPointer<vtkImageActor>::New();
35 originalActor->SetInputData(imageSource->GetOutput());
36
37 vtkSmartPointer<vtkImageActor> mathActor =
38 vtkSmartPointer<vtkImageActor>::New();
39 mathActor->SetInputData(imageMath->GetOutput());
40
41 double leftViewport[4] = {0.0, 0.0, 0.5, 1.0};
42 double rightViewport[4] = {0.5, 0.0, 1.0, 1.0};
43
44 vtkSmartPointer<vtkRenderer> originalRenderer =
45 vtkSmartPointer<vtkRenderer>::New();
46 originalRenderer->SetViewport(leftViewport);
47 originalRenderer->AddActor(originalActor);
48 originalRenderer->ResetCamera();
49 originalRenderer->SetBackground(1.0, 1.0, 1.0);
50
51 vtkSmartPointer<vtkRenderer> gradientMagnitudeRenderer =
52 vtkSmartPointer<vtkRenderer>::New();
53 gradientMagnitudeRenderer->SetViewport(rightViewport);
54 gradientMagnitudeRenderer->AddActor(mathActor);
55 gradientMagnitudeRenderer->ResetCamera();
56 gradientMagnitudeRenderer->SetBackground(1.0, 1.0, 1.0);
57
58 vtkSmartPointer<vtkRenderWindow> renderWindow =
59 vtkSmartPointer<vtkRenderWindow>::New();
60 renderWindow->AddRenderer(originalRenderer);
61 renderWindow->AddRenderer(gradientMagnitudeRenderer);
62 renderWindow->SetSize(640, 480);
63 renderWindow->Render();
64 renderWindow->SetWindowName("ImageMathematicsExample");
65
66 vtkSmartPointer<vtkRenderWindowInteractor> renderWindowInteractor =
67 vtkSmartPointer<vtkRenderWindowInteractor>::New();
68 vtkSmartPointer<vtkInteractorStyleImage> style =
69 vtkSmartPointer<vtkInteractorStyleImage>::New();
70
71 renderWindowInteractor->SetInteractorStyle(style);
72 renderWindowInteractor->SetRenderWindow(renderWindow);
73 renderWindowInteractor->Initialize();
74 renderWindowInteractor->Start();
75
76 return EXIT_SUCCESS;
77 }
