OpenGL旋转变换

效果图：

 

代码：

  1 #define GLUT_DISABLE_ATEXIT_HACK
  2 #include "gl/glut.h"
  3 
  4 GLint Angle;
  5 void OnDisplay(void);
  6 void OnReShape(int,int);
  7 void OnTimer(int);
  8 void SetupLights();
  9 
 10 void main(int argc,char* argv[])
 11 {
 12     glutInit(&argc,argv);
 13     glutInitDisplayMode(GLUT_DOUBLE | GLUT_RGB | GLUT_DEPTH);
 14     glutInitWindowSize(600,480);
 15     glutCreateWindow("OpenGL旋转变换");
 16     
 17     glutReshapeFunc(OnReShape);
 18     glutDisplayFunc(OnDisplay);
 19     glutTimerFunc(100,OnTimer,1);
 20 
 21     
 22     SetupLights();
 23     
 24     glutMainLoop();
 25 }
 26 
 27 void OnDisplay(void)
 28 {
 29     glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
 30     
 31     glEnable(GL_DEPTH_TEST);
 32     
 33     glMatrixMode(GL_MODELVIEW);
 34     glLoadIdentity();
 35 
 36     glRotatef(30.0f,1.0f,0.0f,0.0f);
 37     glRotatef(15.0f,0.0f,1.0f,0.0f);
 38 
 39 
 40     glColor3f(1.0f,0.0f,0.0f);
 41     glBegin(GL_LINES);
 42         glVertex3f(-50.0f,-50.0f,-50.0f);
 43         glVertex3f(50.0f,50.0f,50.0f);
 44     glEnd();
 45 
 46     
 47     glPushMatrix();
 48     glRotatef(Angle,1.0f,1.0f,1.0f);
 49     glColor3f(1.0f,1.0f,0.0f);
 50     glutSolidCube(50.0f);
 51     glPopMatrix();
 52     
 53     glutSwapBuffers();
 54     
 55 }
 56 
 57 void OnReShape(int w,int h)
 58 {
 59     GLfloat aspect =(GLfloat)w/(GLfloat)h;
 60     GLfloat nRange=100.0f;
 61     
 62     glViewport(0,0,w,h);
 63     
 64     glMatrixMode(GL_PROJECTION);     //将当前矩阵指定为投影模式
 65     glLoadIdentity();
 66     
 67     //设置三维投影区
 68     
 69     if (w<=h)
 70     {
 71         glOrtho(-nRange,nRange,-nRange*aspect,nRange*aspect,-nRange,nRange);
 72     } 
 73     else
 74     {
 75         glOrtho(-nRange,nRange,-nRange/aspect,nRange/aspect,-nRange,nRange);
 76     }
 77     
 78 }
 79 
 80 void OnTimer(int value)
 81 {
 82     Angle +=10;
 83     glutPostRedisplay();
 84     glutTimerFunc(100,OnTimer,1);
 85 }
 86 
 87 void SetupLights()
 88 {
 89     GLfloat ambientLight[]={0.2f,0.2f,0.2f,1.0f};//环境光
 90     GLfloat diffuseLight[]={0.9f,0.9f,0.9f,1.0f};//漫反射
 91     GLfloat specularLight[]={1.0f,1.0f,1.0f,1.0f};//镜面光
 92     GLfloat lightPos[]={50.0f,80.0f,60.0f,1.0f};//光源位置
 93     
 94     glEnable(GL_LIGHTING);                      //启用光照
 95     glLightfv(GL_LIGHT0,GL_AMBIENT,ambientLight);//设置环境光源
 96     glLightfv(GL_LIGHT0,GL_DIFFUSE,diffuseLight);//设置漫反射光源
 97     glLightfv(GL_LIGHT0,GL_SPECULAR,specularLight);//设置镜面光源
 98     glLightfv(GL_LIGHT0,GL_POSITION,lightPos);//设置灯光位置
 99     glEnable(GL_LIGHT0);                              //打开第一个灯光
100     
101     glEnable(GL_COLOR_MATERIAL);                      //启用材质的颜色跟踪
102     glColorMaterial(GL_FRONT,GL_AMBIENT_AND_DIFFUSE); //指定材料着色的面
103     glMaterialfv(GL_FRONT,GL_SPECULAR,specularLight); //指定材料对镜面光的反应
104     glMateriali(GL_FRONT,GL_SHININESS,100);           //指定反射系数
105     
106     
107  }



 posted on 2012-04-06 16:42  xiacl  阅读(313)  评论(0)    收藏  举报