source: ttyvaders/trunk/src/ttyvaders.c @ 2990 Tweet

/*
 *  ttyvaders     Textmode shoot'em up
 *  Copyright (c) 2006 Sam Hocevar <sam@zoy.org>
 *                All Rights Reserved
 *
 *  $Id: ttyvaders.c 2990 2008-10-18 21:42:24Z sam $
 *
 *  This program is free software. It comes without any warranty, to
 *  the extent permitted by applicable law. You can redistribute it
 *  and/or modify it under the terms of the Do What The Fuck You Want
 *  To Public License, Version 2, as published by Sam Hocevar. See
 *  http://sam.zoy.org/wtfpl/COPYING for more details.
 */

#include "config.h"

#include <stdio.h>

#include <caca.h>

caca_canvas_t *cv;
caca_display_t *dp;

caca_canvas_t *ship, *alien;

unsigned int shipx, shipy;

unsigned int frame, w, h;
int ground[81];

static void run_game(void);

int main(int argc, char **argv)
{
    cv = caca_create_canvas(80, 24);
    if(!cv)
        return 1;

    dp = caca_create_display(cv);
    if(!dp)
        return 1;

    caca_set_display_time(dp, 80000);

    /* Initialize our program */
    w = caca_get_canvas_width(cv);
    h = caca_get_canvas_height(cv);

    /* Load data */
    ship = caca_create_canvas(0, 0);
    caca_import_file(ship, "data/ship.ans", "");
    alien = caca_create_canvas(0, 0);
    caca_import_file(alien, "data/alien.ans", "");

    /* Go ! */
    run_game();

    /* Clean up */
    caca_free_display(dp);
    caca_free_canvas(cv);

    return 0;
}

static void update_ground(void)
{
    int i;

    for(i = 0; i < 80; i++)
        ground[i] = ground[i + 1];

    ground[80] = ground[79];

    if(frame % 3)
        return;

    ground[80] += caca_rand(-1, 2);
    if(ground[80] < 2)
        ground[80] = 3;
    else if(ground[80] > 7)
        ground[80] = 7;
}

static void fill_ground(void)
{
    int i;

    ground[80] = 5;
    for(i = 0; i < 80; i++)
        update_ground();
}

static void display_ground(void)
{
    unsigned int i, j;

    for(i = 0; i < 80; i++)
    {
        /* Draw the sky */
        caca_set_color_ansi(cv, CACA_LIGHTBLUE, CACA_LIGHTCYAN);
        for(j = h - 24; j < h - 18 + ((40 - i) * (40 - i) / (40 * 40 / 10)) + (i & 1); j++)
            caca_put_char(cv, i, j, ' ');
        caca_put_char(cv, i, j++, 0x2591);
        caca_put_char(cv, i, j++, 0x2591);
        caca_put_char(cv, i, j++, 0x2591);
        caca_put_char(cv, i, j++, 0x2592);
        caca_put_char(cv, i, j++, 0x2592);
        caca_put_char(cv, i, j++, 0x2592);
        caca_put_char(cv, i, j++, 0x2593);
        caca_put_char(cv, i, j++, 0x2593);
        caca_put_char(cv, i, j++, 0x2593);
        caca_set_color_ansi(cv, CACA_LIGHTBLUE, CACA_LIGHTBLUE);
        for( ; j < h; j++)
            caca_put_char(cv, i, j, ' ');

        /* TODO: Draw the mountains */

        /* Draw the ground */
        j = h - ground[i];
        caca_set_color_ansi(cv, CACA_BLACK, CACA_LIGHTBLUE);
/*        if(i >= 4 && ground[i] == ground[i - 6]
                  && ground[i] != ground[i - 7])
        {
            caca_putstr(cv, i - 3, j - 2,    "Omm");
            caca_putstr(cv, i - 6, j - 1, "(/)-(/)");
        }*/
        caca_set_color_ansi(cv, CACA_RED, CACA_GREEN);
        if(ground[i + 1] > ground[i])
            caca_put_char(cv, i, j++, 0x2588); // UTF-8: 0x259f
        else if(ground[i + 1] < ground[i])
        {
            j++;
            caca_put_char(cv, i, j++, 0x2588); // UTF-8: 0x2599
        }
        else
            caca_put_char(cv, i, j++, 0x2584);
        caca_set_color_ansi(cv, CACA_RED, CACA_BROWN);
        caca_put_char(cv, i, j++, 0x2593);
        caca_put_char(cv, i, j++, 0x2592);
        caca_put_char(cv, i, j++, 0x2591);
        for( ; j < h; j++)
            caca_put_char(cv, i, j, ' ');
    }
}

static void display_stuff(void)
{
    caca_blit(cv, shipx, shipy, ship, NULL);
    caca_blit(cv, 68, h - 22, alien, NULL);
    caca_blit(cv, 52, h - 16, alien, NULL);
    caca_set_color_ansi(cv, CACA_WHITE, CACA_BLUE);
    caca_printf(cv, 2, h - 2, " %i fps ", 1000000 / (1 + caca_get_display_time(dp)));
}

static void run_game(void)
{
    fill_ground();
    shipx = 5;
    shipy = h - 20;

    for(;;)
    {
        caca_event_t ev;

        update_ground();
        display_ground();
        display_stuff();
        caca_refresh_display(dp);
        frame++;

        while(caca_get_event(dp, CACA_EVENT_KEY_PRESS, &ev, 0))
        {
            switch(ev.data.key.ch)
            {
                case CACA_KEY_ESCAPE: goto end; break;
                case CACA_KEY_UP: shipy -= 1; break;
                case CACA_KEY_DOWN: shipy += 1; break;
            }
        }

        continue; end: break;
    }
}