source: trunk/ncurses/test/rain.c@ 3003

/*
 * $Id: rain.c,v 1.20 2002/06/29 23:32:18 tom Exp $
 */
#include <test.priv.h>

/* rain 11/3/1980 EPS/CITHEP */

static float ranf(void);
static void onsig(int sig);

static int
next_j(int j)
{
    if (j == 0)
        j = 4;
    else
        --j;
    if (has_colors()) {
        int z = (int) (3 * ranf());
        chtype color = COLOR_PAIR(z);
        if (z)
            color |= A_BOLD;
        attrset(color);
    }
    return j;
}

int
main(
        int argc GCC_UNUSED,
        char *argv[]GCC_UNUSED)
{
    int x, y, j;
    static int xpos[5], ypos[5];
    float r;
    float c;

    setlocale(LC_ALL, "");

    for (j = SIGHUP; j <= SIGTERM; j++)
        if (signal(j, SIG_IGN) != SIG_IGN)
            signal(j, onsig);

    initscr();
    if (has_colors()) {
        int bg = COLOR_BLACK;
        start_color();
#if HAVE_USE_DEFAULT_COLORS
        if (use_default_colors() == OK)
            bg = -1;
#endif
        init_pair(1, COLOR_BLUE, bg);
        init_pair(2, COLOR_CYAN, bg);
    }
    nl();
    noecho();
    curs_set(0);
    timeout(0);

    r = (float) (LINES - 4);
    c = (float) (COLS - 4);
    for (j = 5; --j >= 0;) {
        xpos[j] = (int) (c * ranf()) + 2;
        ypos[j] = (int) (r * ranf()) + 2;
    }

    for (j = 0;;) {
        x = (int) (c * ranf()) + 2;
        y = (int) (r * ranf()) + 2;

        mvaddch(y, x, '.');

        mvaddch(ypos[j], xpos[j], 'o');

        j = next_j(j);
        mvaddch(ypos[j], xpos[j], 'O');

        j = next_j(j);
        mvaddch(ypos[j] - 1, xpos[j], '-');
        mvaddstr(ypos[j], xpos[j] - 1, "|.|");
        mvaddch(ypos[j] + 1, xpos[j], '-');

        j = next_j(j);
        mvaddch(ypos[j] - 2, xpos[j], '-');
        mvaddstr(ypos[j] - 1, xpos[j] - 1, "/ \\");
        mvaddstr(ypos[j], xpos[j] - 2, "| O |");
        mvaddstr(ypos[j] + 1, xpos[j] - 1, "\\ /");
        mvaddch(ypos[j] + 2, xpos[j], '-');

        j = next_j(j);
        mvaddch(ypos[j] - 2, xpos[j], ' ');
        mvaddstr(ypos[j] - 1, xpos[j] - 1, "   ");
        mvaddstr(ypos[j], xpos[j] - 2, "     ");
        mvaddstr(ypos[j] + 1, xpos[j] - 1, "   ");
        mvaddch(ypos[j] + 2, xpos[j], ' ');

        xpos[j] = x;
        ypos[j] = y;

        switch (getch()) {
        case ('q'):
        case ('Q'):
            curs_set(1);
            endwin();
            ExitProgram(EXIT_SUCCESS);
        case 's':
            nodelay(stdscr, FALSE);
            break;
        case ' ':
            nodelay(stdscr, TRUE);
            break;
#ifdef KEY_RESIZE
        case (KEY_RESIZE):
            r = (float) (LINES - 4);
            c = (float) (COLS - 4);
            break;
#endif
        }
        napms(50);
    }
}

static void
onsig(int n GCC_UNUSED)
{
    curs_set(1);
    endwin();
    ExitProgram(EXIT_FAILURE);
}

static float
ranf(void)
{
    long r = (rand() & 077777);
    return ((float) r / 32768.);
}