1 #include <vtkAutoInit.h>
2 VTK_MODULE_INIT(vtkRenderingOpenGL);
3 VTK_MODULE_INIT(vtkRenderingVolumeOpenGL);
4 VTK_MODULE_INIT(vtkRenderingFreeType);
5 VTK_MODULE_INIT(vtkInteractionStyle);
6
7
8 #include <vtkSmartPointer.h>
9 #include <vtkStructuredPoints.h>//vtkStructuredPointsReader* -> vtkGPUVolumeRayCastMapper*
10 #include <vtkStructuredPointsReader.h>
11 #include <vtkGPUVolumeRayCastMapper.h>
12 #include <vtkVolumeProperty.h>
13 #include <vtkPiecewiseFunction.h>
14 #include <vtkColorTransferFunction.h>
15 #include <vtkVolume.h>
16 #include <vtkRenderer.h>
17 #include <vtkRenderWindow.h>
18 #include <vtkRenderWindowInteractor.h>
19 #include <vtkCamera.h>
20
21
22 int main()
23 {
24 vtkSmartPointer<vtkStructuredPointsReader> reader =
25 vtkSmartPointer<vtkStructuredPointsReader>::New();
26 reader->SetFileName("mummy.128.vtk");
27 reader->Update();
28
29
30 vtkSmartPointer<vtkGPUVolumeRayCastMapper> origMapper =
31 vtkSmartPointer<vtkGPUVolumeRayCastMapper>::New();
32 origMapper->SetInputData(reader->GetOutput());
33
34
35 vtkSmartPointer<vtkGPUVolumeRayCastMapper> volumeMapper =
36 vtkSmartPointer<vtkGPUVolumeRayCastMapper>::New();
37 volumeMapper->SetInputData(reader->GetOutput());
38 volumeMapper->SetCropping(1);//开启Cropping功能
39 volumeMapper->SetCroppingRegionPlanes(50, 150, 50, 200, 50, 150);
40 volumeMapper->SetCroppingRegionFlags(0x0002000);
41 /*****************************************************************/
42 //设置体绘制相关属性
43 vtkSmartPointer<vtkVolumeProperty> volumeProperty =
44 vtkSmartPointer<vtkVolumeProperty>::New();
45 volumeProperty->SetInterpolationTypeToLinear(); //设置线性插值方式
46 volumeProperty->ShadeOn();//开启阴影属性
47 volumeProperty->SetAmbient(0.4);//设置环境温度
48 volumeProperty->SetDiffuse(0.6);//设置漫反射系数
49 volumeProperty->SetSpecular(0.2);//设置镜面反射系数
50 //添加灰度不透明度属性
51 vtkSmartPointer<vtkPiecewiseFunction> compositeOpacity =
52 vtkSmartPointer<vtkPiecewiseFunction>::New();
53 compositeOpacity->AddPoint(70, 0.0);
54 compositeOpacity->AddPoint(90, 0.4);
55 compositeOpacity->AddPoint(180, 0.6);
56 volumeProperty->SetScalarOpacity(compositeOpacity);
57 //添加梯度不同明度属性
58 vtkSmartPointer<vtkPiecewiseFunction> gradientOpacity =
59 vtkSmartPointer<vtkPiecewiseFunction>::New();
60 gradientOpacity->AddPoint(10, 0.0);
61 gradientOpacity->AddPoint(90, 0.5);
62 gradientOpacity->AddPoint(100, 1.0);
63 volumeProperty->SetGradientOpacity(gradientOpacity);
64 //添加颜色传输
65 vtkSmartPointer<vtkColorTransferFunction> color =
66 vtkSmartPointer<vtkColorTransferFunction>::New();
67 color->AddRGBPoint(0, 0, 0, 0);
68 color->AddRGBPoint(64, 1.0, 0.52, 0.3);
69 color->AddRGBPoint(190.0, 1.00, 1.00, 1.00);
70 color->AddRGBPoint(220.0, 0.20, 0.20, 0.20);
71 volumeProperty->SetColor(color);
72 /***********************************************************/
73 //渲染管道
74 vtkSmartPointer<vtkVolume> origVolume =
75 vtkSmartPointer<vtkVolume>::New();
76 origVolume->SetMapper(origMapper);
77 origVolume->SetProperty(volumeProperty);
78
79
80 vtkSmartPointer<vtkVolume> croppingVolume =
81 vtkSmartPointer<vtkVolume>::New();
82 croppingVolume->SetMapper(volumeMapper);
83 croppingVolume->SetProperty(volumeProperty);
84
85
86 /
87 double origView[4] = { 0, 0, 0.5, 1 };
88 double croppingView[4] = { 0.5, 0, 1, 1 };
89 vtkSmartPointer<vtkRenderer> origRender =
90 vtkSmartPointer<vtkRenderer>::New();
91 origRender->AddVolume(origVolume);
92 origRender->SetBackground(1, 1, 0);
93 origRender->SetViewport(origView);
94
95
96 vtkSmartPointer<vtkRenderer> croppingRender =
97 vtkSmartPointer<vtkRenderer>::New();
98 croppingRender->AddVolume(croppingVolume);
99 croppingRender->SetBackground(0, 1, 0);
100 croppingRender->SetViewport(croppingView);
101 ///
102 vtkSmartPointer<vtkRenderWindow> rw =
103 vtkSmartPointer<vtkRenderWindow>::New();
104 rw->AddRenderer(origRender);
105 rw->AddRenderer(croppingRender);
106 rw->SetWindowName("Cropping Volume");
107 rw->SetSize(640, 320);
108
109
110 vtkSmartPointer<vtkRenderWindowInteractor> rwi =
111 vtkSmartPointer<vtkRenderWindowInteractor>::New();
112 rwi->SetRenderWindow(rw);
113
114
115 origRender->GetActiveCamera()->SetPosition(0, -1, 0);
116 origRender->GetActiveCamera()->SetFocalPoint(0, 0, 0);
117 origRender->GetActiveCamera()->SetViewUp(0,0,1);
118 origRender->GetActiveCamera()->Azimuth(30);
119 origRender->GetActiveCamera()->Elevation(30);
120 origRender->ResetCamera();
121 croppingRender->SetActiveCamera(origRender->GetActiveCamera());
122
123 rw->Render();
124 rwi->Start();
125 return 0;
126 }
