PROGRAMA DE ILUMINACION

#include <GL/gl.h>
#include <GL/glu.h>
#include <GL/glut.h>

void init(void)
{
   GLfloat mat_specular[] = { 1.0, 0.0, 0.0, 1.0 };
   GLfloat mat_shininess[] = { 50.0 };
   GLfloat light_position[] = { 1.0, 1.0, 1.0, 0.0 };
   GLfloat light_position_2[] = { -1.0, 1.0, 1.0, 0.0 };
   GLfloat light_ambient[] = { 0.5, 0.1, 0.1, 1.0 };
   GLfloat light_diffuse[] = { 0.0, 1.0, 0.0, 1.0 };
   glClearColor (0.0, 0.0, 0.0, 0.0);
   glShadeModel (GL_FLAT);

   glLightfv(GL_LIGHT0, GL_POSITION, light_position);

   glLightfv(GL_LIGHT1, GL_DIFFUSE, light_diffuse);
   glLightfv(GL_LIGHT1, GL_POSITION, light_position_2);

   glLightfv(GL_LIGHT2, GL_AMBIENT, light_ambient);

   glEnable(GL_LIGHTING);

   glEnable(GL_LIGHT0);
   glEnable(GL_LIGHT1);
   glEnable(GL_LIGHT2);

   glEnable(GL_DEPTH_TEST);
}

void display(void)
{
   GLfloat no_mat[] = { 0.0, 0.0, 0.0, 1.0 };
   GLfloat mat_ambient[] = { 0.7, 0.7, 0.7, 1.0 };
   GLfloat mat_ambient_color[] = { 0.8, 0.8, 0.2, 1.0 };
   GLfloat mat_diffuse[] = { 0.1, 0.5, 0.8, 1.0 };
   GLfloat mat_specular[] = { 1.0, 1.0, 1.0, 1.0 };
   GLfloat no_shininess[] = { 0.0 };
   GLfloat low_shininess[] = { 5.0 };
   GLfloat high_shininess[] = { 100.0 };
   GLfloat mat_emission[] = {0.3, 0.2, 0.2, 0.0};
   glClear (GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);

   glMaterialfv(GL_FRONT, GL_AMBIENT, mat_ambient);
   glMaterialfv(GL_FRONT, GL_DIFFUSE, mat_diffuse);
   glMaterialfv(GL_FRONT, GL_SPECULAR, mat_specular);
   glMaterialfv(GL_FRONT, GL_SHININESS, high_shininess);
   glMaterialfv(GL_FRONT, GL_EMISSION, mat_emission);

   glutSolidSphere(1.0, 64, 32);

   glFlush ();
}

void reshape (int w, int h)
{
   glViewport (0, 0, (GLsizei) w, (GLsizei) h);
   glMatrixMode (GL_PROJECTION);
   glLoadIdentity();
   if (w <= h)
      glOrtho (-1.5, 1.5, -1.5*(GLfloat)h/(GLfloat)w,
         1.5*(GLfloat)h/(GLfloat)w, -10.0, 10.0);
   else
      glOrtho (-1.5*(GLfloat)w/(GLfloat)h,
         1.5*(GLfloat)w/(GLfloat)h, -1.5, 1.5, -10.0, 10.0);
   glMatrixMode(GL_MODELVIEW);
   glLoadIdentity();
}

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);
   glutMainLoop();
   return 0;
}