} else {
// Draw square.
// **NOTE: Is the polygon facing in the right direction?
+ srand ( time(NULL) + x1 );
+ if ( rand() % 10 < 5 ) {
+ //printf("Random don't draw\n");
+ return;
+ }
+ //printf("Drawing square (%f, %f), (%f, %f), (%f, %f), (%f, %f)\n", x1, z1, x1, z2, x2, z2, x2, z1);
glBegin(GL_QUADS);
glNormal3f(0,1,0);
glVertex3f(x1, 0.0, z1);