Luz_Dona.c

//  LUZ GIRANDO ALREDEDOR DE UNA DONA

#include <GL/glut.h>
#include <unistd.h>

static int spin = 0;
void init(void) 
{
   glClearColor(0.0, 0.0, 0.0, 0.0);
   glShadeModel(GL_SMOOTH);
   glEnable(GL_LIGHTING);
   glEnable(GL_LIGHT0);
   glEnable(GL_DEPTH_TEST);
}

void display(void)
{
   GLfloat position[] = { 0.0, 0.0, 1.5, 1.0 };
   glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
   glPushMatrix();
	glTranslatef(0.0, 0.0, -5.0);
	glPushMatrix();
		glRotated((GLdouble) spin, 1.0, 0.0, 0.0);
		glLightfv(GL_LIGHT0, GL_POSITION, position);
		glTranslated(0.0, 0.0, 1.5);
		glDisable(GL_LIGHTING);
			glColor3f(0.0, 1.0, 1.0); glutWireCube(0.1);
		glEnable(GL_LIGHTING);
	glPopMatrix();
	glutSolidTorus(0.275, 0.85, 8, 15);
   glPopMatrix();
   glFlush();
}
void reshape(int w, int h)
{
   glViewport(0, 0, (GLsizei) w, (GLsizei) h);
   glMatrixMode(GL_PROJECTION);
   glLoadIdentity();
   gluPerspective(40.0, (GLfloat) w/(GLfloat) h, 1.0, 20.0);
   glMatrixMode(GL_MODELVIEW);
   glLoadIdentity();
}
void mouse(int button, int state, int x, int y)
{
   switch (button) {
      case GLUT_LEFT_BUTTON:
         if (state == GLUT_DOWN) {
            spin = (spin + 30) % 360;
            glutPostRedisplay();
         }
         break;
      default:
         break;
   }
}
int main(int argc, char** argv)
{
   glutInit(&argc, argv);
   glutInitDisplayMode(GLUT_SINGLE | GLUT_RGB | GLUT_DEPTH);
   glutInitWindowSize(500, 500); 
   glutInitWindowPosition(100, 100);
   glutCreateWindow(argv[0]);
   init();
   glutDisplayFunc(display); 
   glutReshapeFunc(reshape);
   glutMouseFunc(mouse);
   glutMainLoop();
   return 0;
}