VTK學習記錄4-vktLight

阿新 • • 發佈：2021-07-15

光源有位置光源和平行光源。

程式碼：

 1 //tips：如果不是用cmake編譯，而是用vs編譯的，需要加這三行。
 2 #include "vtkAutoInit.h" 
 3 VTK_MODULE_INIT(vtkRenderingOpenGL2); // VTK was built with vtkRenderingOpenGL2
 4 VTK_MODULE_INIT(vtkInteractionStyle);
 5 
 6 #include <vtkConeSource.h>
 7 #include <vtkRenderer.h>
 8 #include <vtkPolyDataMapper.h>
 9 
 #include <vtkRenderWindow.h> 
10 #include <vtkActor.h>
11 #include <vtkCamera.h>
12 #include <vtkRenderWindowInteractor.h>
13 #include <vtkInteractorStyleTrackballCamera.h>
14 #include <vtkInteractorStyleTrackballActor.h>
15 #include <vtkProperty.h>
16 #include <vtkLight.h>
17 
 
18 int main()
19 {
20     vtkConeSource *cone = vtkConeSource::New();
21     cone->SetResolution(8);
22     cone->SetHeight(5);
23     cone->SetRadius(6);
24 
25     vtkPolyDataMapper *coneMapper = vtkPolyDataMapper::New();
26     coneMapper->SetInputData(cone->GetOutput());
27     coneMapper->SetInputConnection(cone->GetOutputPort());
 
28     
29     vtkActor *vtkactor = vtkActor::New();
30     vtkactor->SetMapper(coneMapper);
31     //vtkactor->GetProperty()->SetColor(1, 0, 0);
32     //不用GetProperty()的方法，用例項化Property的方法也可以。
33     vtkProperty *coneProperty = vtkProperty::New();
34     coneProperty->SetColor(1.0, 0, 0.0); //可以自己設定顏色，非必須，預設銀色
35     vtkactor->SetProperty(coneProperty);
36 
37     vtkRenderer *render = vtkRenderer::New();
38     render->AddActor(vtkactor);
39     render->SetBackground(0.1, 0.2, 0.3);
40 
41     //自己設定light
42     vtkLight *light = vtkLight::New();
43     //light->SetSpecularColor(1.0, 0.0, 0.0); //設定地面光的顏色
44     //light->SetDiffuseColor(0.0, 1.0, 0.0);//設定反射光的顏色
45     light->SetColor(1, 0, 0);//設定光照顏色
46     render->AddLight(light);  //有了light，需要渲染render才行
47 
48 
49 
50     vtkRenderWindow *window = vtkRenderWindow::New();
51     window->SetSize(500, 500);
52     window->AddRenderer(render);
53 
54     vtkRenderWindowInteractor *interactor = vtkRenderWindowInteractor::New();
55     interactor->SetRenderWindow(window);//關聯要互動的視窗
56 
57     //現在設定控制的是相機，也可以實現相同的效果。
58     //vtkInteractorStyleTrackballCamera *style = vtkInteractorStyleTrackballCamera::New();
59     //interactor->SetInteractorStyle(style);
60 
61     //用這個就是設定控制演員
62     vtkInteractorStyleTrackballActor *style2 = vtkInteractorStyleTrackballActor::New();
63     interactor->SetInteractorStyle(style2);
64 
65     //旋轉程式碼
66     /*for (int i = 0; i < 1800; i++)
67     {
68         window->Render();
69         render->GetActiveCamera()->Azimuth(1);
70     }*/
71 
72     interactor->Initialize();
73     interactor->Start(); 
74 
75 
76     cone->Delete();
77     coneMapper->Delete();
78     vtkactor->Delete();
79     render->Delete();
80     window->Delete();
81     interactor->Delete();
82     //style->Delete();
83     return 0;
84 }