Mine

#include <GL/gl.h>#include <GL/glu.h>#include <GL/glut.h>#include <stdlib.h>#include <stdio.h>#include <string.h>GLboolean polySmooth = GL_TRUE;static void init(void){   glCullFace (GL_BACK);   glEnable (GL_CULL_FACE);   glBlendFunc (GL_SRC_ALPHA_SATURATE, GL_ONE);   glClearColor (0.0, 0.0, 0.0, 0.0);}#define NFACE 6#define NVERT 8void drawCube(GLdouble x0, GLdouble x1, GLdouble y0,               GLdouble y1, GLdouble z0, GLdouble z1){   static GLfloat v[8][3];   static GLfloat c[8][4] = {      {0.0, 0.0, 0.0, 1.0}, {1.0, 0.0, 0.0, 1.0},      {0.0, 1.0, 0.0, 1.0}, {1.0, 1.0, 0.0, 1.0},      {0.0, 0.0, 1.0, 1.0}, {1.0, 0.0, 1.0, 1.0},      {0.0, 1.0, 1.0, 1.0}, {1.0, 1.0, 1.0, 1.0}   };/*  indices of front, top, left, bottom, right, back faces  */   static GLubyte indices[NFACE][4] = {      {4, 5, 6, 7}, {2, 3, 7, 6}, {0, 4, 7, 3},      {0, 1, 5, 4}, {1, 5, 6, 2}, {0, 3, 2, 1}   };   v[0][0] = v[3][0] = v[4][0] = v[7][0] = x0;   v[1][0] = v[2][0] = v[5][0] = v[6][0] = x1;   v[0][1] = v[1][1] = v[4][1] = v[5][1] = y0;   v[2][1] = v[3][1] = v[6][1] = v[7][1] = y1;   v[0][2] = v[1][2] = v[2][2] = v[3][2] = z0;   v[4][2] = v[5][2] = v[6][2] = v[7][2] = z1;#ifdef GL_VERSION_1_1   glEnableClientState (GL_VERTEX_ARRAY);   glEnableClientState (GL_COLOR_ARRAY);   glVertexPointer (3, GL_FLOAT, 0, v);   glColorPointer (4, GL_FLOAT, 0, c);   glDrawElements(GL_QUADS, NFACE*4, GL_UNSIGNED_BYTE, indices);   glDisableClientState (GL_VERTEX_ARRAY);   glDisableClientState (GL_COLOR_ARRAY);#else   printf ("If this is GL Version 1.0, ");   printf ("vertex arrays are not supported.\n");   exit(1);#endif}/*  Note:  polygons must be drawn from front to back *  for proper blending. */void display(void){   if (polySmooth) {      glClear (GL_COLOR_BUFFER_BIT);      glEnable (GL_BLEND);      glEnable (GL_POLYGON_SMOOTH);      glDisable (GL_DEPTH_TEST);   }   else {       glClear (GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);      glDisable (GL_BLEND);      glDisable (GL_POLYGON_SMOOTH);      glEnable (GL_DEPTH_TEST);   }   glPushMatrix ();      glTranslatef (0.0, 0.0, -8.0);          glRotatef (30.0, 1.0, 0.0, 0.0);      glRotatef (60.0, 0.0, 1.0, 0.0);       drawCube(-0.5, 0.5, -0.5, 0.5, -0.5, 0.5);   glPopMatrix ();   glFlush ();}void reshape(int w, int h){   glViewport(0, 0, (GLsizei) w, (GLsizei) h);   glMatrixMode(GL_PROJECTION);   glLoadIdentity();   gluPerspective(30.0, (GLfloat) w/(GLfloat) h, 1.0, 20.0);   glMatrixMode(GL_MODELVIEW);   glLoadIdentity();}void keyboard(unsigned char key, int x, int y){   switch (key) {      case 't':      case 'T':         polySmooth = !polySmooth;         glutPostRedisplay();         break;      case 27:         exit(0);  /*  Escape key  */         break;      default:         break;   }}int main(int argc, char** argv){   glutInit(&argc, argv);   glutInitDisplayMode (GLUT_SINGLE | GLUT_RGB                         | GLUT_ALPHA | GLUT_DEPTH);   glutInitWindowSize(200, 200);   glutCreateWindow(argv[0]);   init ();   glutReshapeFunc (reshape);   glutKeyboardFunc (keyboard);   glutDisplayFunc (display);   glutMainLoop();   return 0;}