+static int
+random_x(void)
+{
+ return (int) (((double) (COLS - 4) * ranf()) + 2);
+}
+
+static int
+random_y(void)
+{
+ return (int) (((double) (LINES - 4) * ranf()) + 2);
+}
+
+static int
+next_j(int j)
+{
+ if (j == 0)
+ j = MAX_DROP - 1;
+ else
+ --j;
+ if (has_colors()) {
+ int z = (int) (3 * ranf());
+ (void) attrset(AttrArg(COLOR_PAIR(z), (z ? A_BOLD : A_NORMAL)));
+ }
+ return j;
+}
+
+static void
+part1(DATA * drop)
+{
+ MvAddCh(drop->y, drop->x, '.');
+}
+
+static void
+part2(DATA * drop)
+{
+ MvAddCh(drop->y, drop->x, 'o');
+}
+
+static void
+part3(DATA * drop)
+{
+ MvAddCh(drop->y, drop->x, 'O');
+}
+
+static void
+part4(DATA * drop)
+{
+ MvAddCh(drop->y - 1, drop->x, '-');
+ MvAddStr(drop->y, drop->x - 1, "|.|");
+ MvAddCh(drop->y + 1, drop->x, '-');
+}
+
+static void
+part5(DATA * drop)
+{
+ MvAddCh(drop->y - 2, drop->x, '-');
+ MvAddStr(drop->y - 1, drop->x - 1, "/ \\");
+ MvAddStr(drop->y, drop->x - 2, "| O |");
+ MvAddStr(drop->y + 1, drop->x - 1, "\\ /");
+ MvAddCh(drop->y + 2, drop->x, '-');
+}
+
+static void
+part6(DATA * drop)
+{
+ MvAddCh(drop->y - 2, drop->x, ' ');
+ MvAddStr(drop->y - 1, drop->x - 1, " ");
+ MvAddStr(drop->y, drop->x - 2, " ");
+ MvAddStr(drop->y + 1, drop->x - 1, " ");
+ MvAddCh(drop->y + 2, drop->x, ' ');
+}
+
+#ifdef USE_PTHREADS
+static void
+napsome(void)
+{
+ napms(60);
+}
+
+/*
+ * This runs inside the use_window() mutex.
+ */
+static int
+really_draw(WINDOW *win, void *arg)
+{
+ DATA *data = (DATA *) arg;
+
+ (void) win;
+ next_j(data->state);
+ data->func(data);
+ refresh();
+ return OK;
+}
+
+static void
+draw_part(void (*func) (DATA *), int state, DATA * data)
+{
+ data->func = func;
+ data->state = state;
+ use_window(stdscr, really_draw, (void *) data);
+ napsome();
+}
+
+/*
+ * Tell the threads that one of them can start work on a new raindrop.
+ * They may all be busy if we're sending requests too rapidly.
+ */
+static int
+put_next_drop(void)
+{
+ pthread_cond_signal(&cond_next_drop);
+ pthread_mutex_unlock(&mutex_next_drop);
+
+ return 0;
+}
+
+/*
+ * Wait until we're assigned the task of drawing a new raindrop.
+ */
+static int
+get_next_drop(void)
+{
+ pthread_mutex_lock(&mutex_next_drop);
+ pthread_cond_wait(&cond_next_drop, &mutex_next_drop);