Ubuntu14.04下OpenGL动画测试程序

1 安装freeglut3 OpenGL辅助类库

sudo apt-get install freeglut3-dev

2 编译命令

gcc test.cpp -lglut -lGL -lGLU

从上述命令可以看出，使用了三个类库

3 动画测试程序

//第三方库： sudo apt-get install freeglut3-dev
//           其中，用到了glut.h文件
//编译命令：gcc test.cpp -lglut -lGL -lGLU
#include <GL/glut.h>
#include <stdlib.h>

static GLfloat spin = 0.0;

void display(void)
{
   glClear(GL_COLOR_BUFFER_BIT);
   glPushMatrix();
   glRotatef(spin, 0.0, 0.0, 1.0);
   glColor3f(1.0, 1.0, 1.0);
   glRectf(-25.0, -25.0, 25.0, 25.0);
   glPopMatrix();

   glutSwapBuffers();
}

void spinDisplay(void)
{
   spin = spin + 2.0;
   if (spin > 360.0)
      spin = spin - 360.0;
   glutPostRedisplay();
}

void init(void) 
{
   glClearColor (0.0, 0.0, 0.0, 0.0);
   glShadeModel (GL_FLAT);
}

void reshape(int w, int h)
{
   glViewport (0, 0, (GLsizei) w, (GLsizei) h);
   glMatrixMode(GL_PROJECTION);
   glLoadIdentity();
   glOrtho(-50.0, 50.0, -50.0, 50.0, -1.0, 1.0);
   glMatrixMode(GL_MODELVIEW);
   glLoadIdentity();
}

void mouse(int button, int state, int x, int y) 
{
   switch (button) {
      case GLUT_LEFT_BUTTON:
         if (state == GLUT_DOWN)
            glutIdleFunc(spinDisplay);
         break;
      case GLUT_MIDDLE_BUTTON:
      case GLUT_RIGHT_BUTTON:
         if (state == GLUT_DOWN)
            glutIdleFunc(NULL);
         break;
      default:
         break;
   }
}
   
/* 
 *  Request double buffer display mode.
 *  Register mouse input callback functions
 */
int main(int argc, char** argv)
{
   glutInit(&argc, argv);
   glutInitDisplayMode (GLUT_DOUBLE | GLUT_RGB);
   glutInitWindowSize (250, 250); 
   glutInitWindowPosition (100, 100);
   glutCreateWindow (argv[0]);
   init ();
   glutDisplayFunc(display); 
   glutReshapeFunc(reshape); 
   glutIdleFunc(spinDisplay);
   glutMouseFunc(mouse);
   glutMainLoop();
   return 0;   /* ANSI C requires main to return int. */
}

4 运行

./a.out

结果为一个旋转的矩形动画。