1 #include "vtkAutoInit.h"
2 VTK_MODULE_INIT(vtkRenderingOpenGL2);
3 VTK_MODULE_INIT(vtkInteractionStyle);
4
5 #include <vtkSmartPointer.h>
6 #include <vtkImageData.h>
7 #include <vtkImageAppendComponents.h>
8 #include <vtkImageCanvasSource2D.h>
9 #include <vtkRenderWindow.h>
10 #include <vtkRenderWindowInteractor.h>
11 #include <vtkInteractorStyleImage.h>
12 #include <vtkRenderer.h>
13 #include <vtkJPEGReader.h>
14 #include <vtkImageActor.h>
15
16 int main(int, char *[])
17 {
18 vtkSmartPointer<vtkImageCanvasSource2D> red =
19 vtkSmartPointer<vtkImageCanvasSource2D>::New();
20 red->SetScalarTypeToUnsignedChar();
21 red->SetNumberOfScalarComponents(1);
22 red->SetExtent(0, 100, 0, 100, 0, 0);
23 red->SetDrawColor(0, 0, 0, 0);
24 red->FillBox(0,100,0,100);
25 red->SetDrawColor(255, 0, 0, 0);
26 red->FillBox(20,40,20,40);
27 red->Update();
28
29 vtkSmartPointer<vtkImageCanvasSource2D> green =
30 vtkSmartPointer<vtkImageCanvasSource2D>::New();
31 green->SetScalarTypeToUnsignedChar();
32 green->SetNumberOfScalarComponents(1);
33 green->SetExtent(0, 100, 0, 100, 0, 0);
34 green->SetDrawColor(0, 0, 0, 0);
35 green->FillBox(0,100,0,100);
36 green->SetDrawColor(255, 0, 0, 0);
37 green->FillBox(30,50,30,50);
38 green->Update();
39
40 vtkSmartPointer<vtkImageCanvasSource2D> blue =
41 vtkSmartPointer<vtkImageCanvasSource2D>::New();
42 blue->SetScalarTypeToUnsignedChar();
43 blue->SetNumberOfScalarComponents(1);
44 blue->SetExtent(0, 100, 0, 100, 0, 0);
45 blue->SetDrawColor(0, 0, 0, 0);
46 blue->FillBox(0,100,0,100);
47 blue->SetDrawColor(255, 0, 0, 0);
48 blue->FillBox(40,60,40,60);
49 blue->Update();
50
51 vtkSmartPointer<vtkImageAppendComponents> appendFilter =
52 vtkSmartPointer<vtkImageAppendComponents>::New();
53 appendFilter->SetInputConnection(0, red->GetOutputPort());
54 appendFilter->AddInputConnection(0, green->GetOutputPort());
55 appendFilter->AddInputConnection(0, blue->GetOutputPort());
56 appendFilter->Update();
57
58 vtkSmartPointer<vtkImageActor> redActor =
59 vtkSmartPointer<vtkImageActor>::New();
60 redActor->SetInputData(red->GetOutput());
61
62 vtkSmartPointer<vtkImageActor> greenActor =
63 vtkSmartPointer<vtkImageActor>::New();
64 greenActor->SetInputData(green->GetOutput());
65
66 vtkSmartPointer<vtkImageActor> blueActor =
67 vtkSmartPointer<vtkImageActor>::New();
68 blueActor->SetInputData(blue->GetOutput());
69
70 vtkSmartPointer<vtkImageActor> combinedActor =
71 vtkSmartPointer<vtkImageActor>::New();
72 combinedActor->SetInputData(appendFilter->GetOutput());
73
74 // Define viewport ranges
75 // (xmin, ymin, xmax, ymax)
76 double redViewport[4] = {0.0, 0.0, 0.25, 1.0};
77 double greenViewport[4] = {0.25, 0.0, 0.5, 1.0};
78 double blueViewport[4] = {0.5, 0.0, 0.75, 1.0};
79 double combinedViewport[4] = {0.75, 0.0, 1.0, 1.0};
80
81 // Setup renderers
82 vtkSmartPointer<vtkRenderer> redRenderer =
83 vtkSmartPointer<vtkRenderer>::New();
84 redRenderer->SetViewport(redViewport);
85 redRenderer->AddActor(redActor);
86 redRenderer->ResetCamera();
87 redRenderer->SetBackground(1.0, 1.0, 1.0);
88
89 vtkSmartPointer<vtkRenderer> greenRenderer =
90 vtkSmartPointer<vtkRenderer>::New();
91 greenRenderer->SetViewport(greenViewport);
92 greenRenderer->AddActor(greenActor);
93 greenRenderer->ResetCamera();
94 greenRenderer->SetBackground(1.0, 1.0, 1.0);
95
96 vtkSmartPointer<vtkRenderer> blueRenderer =
97 vtkSmartPointer<vtkRenderer>::New();
98 blueRenderer->SetViewport(blueViewport);
99 blueRenderer->AddActor(blueActor);
100 blueRenderer->ResetCamera();
101 blueRenderer->SetBackground(1.0, 1.0, 1.0);
102
103 vtkSmartPointer<vtkRenderer> combinedRenderer =
104 vtkSmartPointer<vtkRenderer>::New();
105 combinedRenderer->SetViewport(combinedViewport);
106 combinedRenderer->AddActor(combinedActor);
107 combinedRenderer->ResetCamera();
108 combinedRenderer->SetBackground(1.0, 1.0, 1.0);
109
110 vtkSmartPointer<vtkRenderWindow> renderWindow =
111 vtkSmartPointer<vtkRenderWindow>::New();
112 renderWindow->AddRenderer(redRenderer);
113 renderWindow->AddRenderer(greenRenderer);
114 renderWindow->AddRenderer(blueRenderer);
115 renderWindow->AddRenderer(combinedRenderer);
116 renderWindow->SetSize(1200, 300);
117 renderWindow->Render();
118 renderWindow->SetWindowName("ImageAppendComponentsExample");
119
120 vtkSmartPointer<vtkRenderWindowInteractor> renderWindowInteractor =
121 vtkSmartPointer<vtkRenderWindowInteractor>::New();
122 vtkSmartPointer<vtkInteractorStyleImage> style =
123 vtkSmartPointer<vtkInteractorStyleImage>::New();
124
125 renderWindowInteractor->SetInteractorStyle(style);
126 renderWindowInteractor->SetRenderWindow(renderWindow);
127 renderWindowInteractor->Initialize();
128 renderWindowInteractor->Start();
129
130 return EXIT_SUCCESS;
131 }
