Composite 3D Transformation | Computer Graphics Lab Manual | Anna University Chennai | Final Year IT Department

8:PROGRAM:

#include

#include

static int shoulder = 0, elbow = 0;

void init(void)

{

   glClearColor (0.0, 0.0, 0.0, 0.0);

   glShadeModel (GL_FLAT);

}

void display(void)

{

   glClear (GL_COLOR_BUFFER_BIT);

   glPushMatrix();

   glTranslatef (-1.0, 0.0, 0.0);

   glRotatef ((GLfloat) shoulder, 0.0, 0.0, 1.0);

   glTranslatef (1.0, 0.0, 0.0);

   glPushMatrix();

   glScalef (2.0, 0.4, 1.0);

   glutWireCube (1.0);

   glPopMatrix();

   glTranslatef (1.0, 0.0, 0.0);

   glRotatef ((GLfloat) elbow, 0.0, 0.0, 1.0);

   glTranslatef (1.0, 0.0, 0.0);

   glPushMatrix();

   glScalef (2.0, 0.4, 1.0);

   glutWireCube (1.0);

   glPopMatrix();

   glPopMatrix();

   glutSwapBuffers();

}

void reshape (int w, int h)

{

   glViewport (0, 0, (GLsizei) w, (GLsizei) h);

   glMatrixMode (GL_PROJECTION);

   glLoadIdentity ();

   gluPerspective(65.0, (GLfloat) w/(GLfloat) h, 1.0, 20.0);

   glMatrixMode(GL_MODELVIEW);

   glLoadIdentity();

   glTranslatef (0.0, 0.0, -5.0);

}

void keyboard (unsigned char key, int x, int y)

{

   switch (key) {

      case 's':

         shoulder = (shoulder + 5) % 360;

         glutPostRedisplay();

         break;

      case 'S':

         shoulder = (shoulder - 5) % 360;

         glutPostRedisplay();

         break;

      case 'e':

         elbow = (elbow + 5) % 360;

         glutPostRedisplay();

         break;

      case 'E':

         elbow = (elbow - 5) % 360;

         glutPostRedisplay();

         break;

      case 27:

         exit(0);

         break;

      default:

         break;

   }

}

int main(int argc, char** argv)

{

   glutInit(&argc, argv);

   glutInitDisplayMode (GLUT_DOUBLE | GLUT_RGB);

   glutInitWindowSize (500, 500);

   glutInitWindowPosition (100, 100);

   glutCreateWindow (argv[0]);

   init ();

   glutDisplayFunc(display);

   glutReshapeFunc(reshape);

   glutKeyboardFunc(keyboard);

   glutMainLoop();

   return 0;

}