OpenGL平移变换

效果图：

 

代码：

 1 #define GLUT_DISABLE_ATEXIT_HACK
 2 #include "gl/glut.h"
 3 
 4  
 5  void OnDisplay(void);
 6  void OnReShape(int,int);
 7  void SetupLights();
 8  
 9  void main(int argc,char* argv[])
10  {
11      glutInit(&argc,argv);
12      glutInitDisplayMode(GLUT_DOUBLE | GLUT_RGB | GLUT_DEPTH);
13      glutInitWindowSize(600,480);
14      glutCreateWindow("OpenGL平移变换");
15  
16      glutReshapeFunc(OnReShape);
17      glutDisplayFunc(OnDisplay);
18 
19      SetupLights();
20  
21      glutMainLoop();
22  }
23  
24  void OnDisplay(void)
25  {
26      glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
27  
28      glEnable(GL_DEPTH_TEST);
29  
30      glMatrixMode(GL_MODELVIEW);
31      glLoadIdentity();
32 
33      glColor3f(1.0f,0.0f,0.0f);
34      glutSolidSphere(10.0f,20,20);
35 
36      glTranslatef(0.0f,50.0f,0.0f);
37      glColor3f(0.0f,1.0f,0.0f);
38      glutSolidSphere(10.0f,20,20);
39 
40      glLoadIdentity();
41 
42      glTranslatef(50.0f,0.0f,0.0f);
43      glColor3f(0.0f,0.0f,1.0f);
44      glutSolidSphere(10.0f,20,20);
45 
46      glutSwapBuffers();
47  
48  }
49  
50  void OnReShape(int w,int h)
51  {
52      GLfloat aspect =(GLfloat)w/(GLfloat)h;
53      GLfloat nRange=100.0f;
54  
55      glViewport(0,0,w,h);
56  
57      glMatrixMode(GL_PROJECTION);     //将当前矩阵指定为投影模式
58      glLoadIdentity();
59  
60      //设置三维投影区
61  
62      if (w<=h)
63      {
64          glOrtho(-nRange,nRange,-nRange*aspect,nRange*aspect,-nRange,nRange);
65      } 
66      else
67      {
68          glOrtho(-nRange,nRange,-nRange/aspect,nRange/aspect,-nRange,nRange);
69      }
70  
71  }
72  
73  void SetupLights()
74  {
75   GLfloat ambientLight[]={0.2f,0.2f,0.2f,1.0f};//环境光
76   GLfloat diffuseLight[]={0.9f,0.9f,0.9f,1.0f};//漫反射
77   GLfloat specularLight[]={1.0f,1.0f,1.0f,1.0f};//镜面光
78   GLfloat lightPos[]={50.0f,80.0f,60.0f,1.0f};//光源位置
79   
80   glEnable(GL_LIGHTING);                      //启用光照
81   glLightfv(GL_LIGHT0,GL_AMBIENT,ambientLight);//设置环境光源
82   glLightfv(GL_LIGHT0,GL_DIFFUSE,diffuseLight);//设置漫反射光源
83   glLightfv(GL_LIGHT0,GL_SPECULAR,specularLight);//设置镜面光源
84   glLightfv(GL_LIGHT0,GL_POSITION,lightPos);//设置灯光位置
85   glEnable(GL_LIGHT0);                              //打开第一个灯光
86   
87   glEnable(GL_COLOR_MATERIAL);                      //启用材质的颜色跟踪
88   glColorMaterial(GL_FRONT,GL_AMBIENT_AND_DIFFUSE); //指定材料着色的面
89   glMaterialfv(GL_FRONT,GL_SPECULAR,specularLight); //指定材料对镜面光的反应
90   glMateriali(GL_FRONT,GL_SHININESS,100);           //指定反射系数
91   
92  
93  }



 posted on 2012-04-06 16:26  xiacl  阅读(392)  评论(0)    收藏  举报