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/* A simple program to show how to set up an X window for OpenGL rendering.
* X86 compilation: gcc -o -L/usr/X11/lib   main main.c -lGL -lX11
* X64 compilation: gcc -o -L/usr/X11/lib64 main main.c -lGL -lX11
*/



static int snglBuf[] = {GLX_RGBA, GLX_DEPTH_SIZE, 16, None};
static int dblBuf[]  = {GLX_RGBA, GLX_DEPTH_SIZE, 16, GLX_DOUBLEBUFFER, None};

Display   *dpy;
Window     win;
GLfloat    xAngle = 42.0, yAngle = 82.0, zAngle = 112.0;
GLboolean  doubleBuffer = GL_TRUE;

void fatalError(char *message)
{
 fprintf(stderr, "main: %s\n", message);
 exit(1);
}

void redraw(void)
{
 static GLboolean   displayListInited = GL_FALSE;

 if (displayListInited)
 {
   /* if display list already exists, just execute it */
   glCallList(1);
 }
 else
 {
   /* otherwise compile and execute to create the display list */
   glNewList(1, GL_COMPILE_AND_EXECUTE);
   glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);

   /* front face */
   glBegin(GL_QUADS);
     glColor3f(0.0, 0.7, 0.1);  /* green */
  …