view xrogue/bolt.c @ 282:8b6aba552f6f

Excise md_putchar(). The function wrapped the standard putchar(), doing nothing beside discarding the return value. That could cause problems with tputs(), which expects an int to be returned.
author John "Elwin" Edwards
date Mon, 18 Sep 2017 19:11:57 -0400
parents 7c1cb43f346e
children e52a8a7ad4c5
line wrap: on
line source

/*
    bolt.c  -  functions shooting an object across the room
        
    XRogue: Expeditions into the Dungeons of Doom
    Copyright (C) 1991 Robert Pietkivitch
    All rights reserved.
    
    Based on "Advanced Rogue"
    Copyright (C) 1984, 1985 Michael Morgan, Ken Dalka and AT&T
    All rights reserved.

    Based on "Rogue: Exploring the Dungeons of Doom"
    Copyright (C) 1980, 1981 Michael Toy, Ken Arnold and Glenn Wichman
    All rights reserved.
    
    See the file LICENSE.TXT for full copyright and licensing information.
*/

#include <curses.h>
#include <ctype.h>
#include <string.h>
#include "rogue.h"

/*
 * shoot_bolt fires a bolt from the given starting point in the
 *            given direction
 */

void
shoot_bolt(struct thing *shooter, coord start, coord dir, bool get_points, 
           short reason, char *name, int damage)
{
    unsigned char dirch = 0, ch;
    bool used, change, see_him;
    short y, x, bounces;
    coord pos;
    struct linked_list *target=NULL;
    struct {
        coord place;
        char oldch;
    } spotpos[BOLT_LENGTH];

    switch (dir.y + dir.x) {
        case 0: dirch = '/';
        when 1: case -1: dirch = (dir.y == 0 ? '-' : '|');
        when 2: case -2: dirch = '\\';
    }
    pos.y = start.y + dir.y;
    pos.x = start.x + dir.x;
    used = FALSE;
    change = FALSE;

    bounces = 0;        /* No bounces yet */
    nofont(cw);
    for (y = 0; y < BOLT_LENGTH && !used; y++) {
        ch = winat(pos.y, pos.x);
        spotpos[y].place = pos;
        spotpos[y].oldch = mvwinch(cw, pos.y, pos.x);

        /* Are we at hero? */
        if (ce(pos, hero)) goto at_hero;

        switch (ch) {
            case SECRETDOOR:
            case VERTWALL:
            case HORZWALL:
            case ' ':
                if (dirch == '-' || dirch == '|') {
                    dir.y = -dir.y;
                    dir.x = -dir.x;
                }
                else {
                    unsigned char chx = mvinch(pos.y-dir.y, pos.x),
                         chy = mvinch(pos.y, pos.x-dir.x);
                    bool anychange = FALSE; /* Did we change anthing */

                    if (chy == WALL || chy == SECRETDOOR ||
                        chy == HORZWALL || chy == VERTWALL) {
                        dir.y = -dir.y;
                        change ^= TRUE; /* Change at least one direction */
                        anychange = TRUE;
                    }
                    if (chx == WALL || chx == SECRETDOOR ||
                        chx == HORZWALL || chx == VERTWALL) {
                        dir.x = -dir.x;
                        change ^= TRUE; /* Change at least one direction */
                        anychange = TRUE;
                    }

                    /* If we didn't make any change, make both changes */
                    if (!anychange) {
                        dir.x = -dir.x;
                        dir.y = -dir.y;
                    }
                }

                /* Do we change how the bolt looks? */
                if (change) {
                    change = FALSE;
                    if (dirch == '\\') dirch = '/';
                    else if (dirch == '/') dirch = '\\';
                }

                y--;    /* The bounce doesn't count as using up the bolt */

                /* Make sure we aren't in an infinite bounce */
                if (++bounces > BOLT_LENGTH) used = TRUE;
                msg("The %s bounces", name);
                break;
            default:
                if (isalpha(ch)) {
                    register struct linked_list *item;
                    struct thing *tp;
                    register char *mname;
                    bool see_monster = cansee(pos.y, pos.x);

                    item = find_mons(unc(pos));
                    assert(item != NULL);
                    tp = THINGPTR(item);
                    mname = monster_name(tp);

                    /*
                     * If our prey shot this, let's record the fact that
                     * he can shoot, regardless of whether he hits us.
                     */
                    if (tp->t_dest != NULL && ce(*tp->t_dest, shooter->t_pos)) 
                        tp->t_wasshot = TRUE;

                    if (!save(VS_BREATH, tp, -(shooter->t_stats.s_lvl/10))) {
                        if (see_monster) {
                            if (on(*tp, ISDISGUISE) &&
                                (tp->t_type != tp->t_disguise)) {
                                msg("Wait! That's a %s!", mname);
                                turn_off(*tp, ISDISGUISE);
                            }

                            turn_off(*tp, CANSURPRISE);
                            msg("The %s hits %s", name, prname(mname, FALSE));
                        }

                        /* Should we start to chase the shooter? */
                        if (shooter != &player                  &&
                            shooter != tp                       &&
                            shooter->t_index != tp->t_index     &&
                            (tp->t_dest == NULL || rnd(100) < 25)) {
                            /*
                             * If we're intelligent enough to realize that this
                             * is a friendly monster, we will attack the hero
                             * instead.
                             */
                            if (on(*shooter, ISFRIENDLY) &&
                                 roll(3,6) < tp->t_stats.s_intel)
                                 runto(tp, &hero);

                            /* Otherwise, let's chase the monster */
                            else runto(tp, &shooter->t_pos);
                        }
                        else if (shooter == &player) {
                            runto(tp, &hero);

                            /*
                             * If the player shot a charmed monster, it may
                             * not like being shot at.
                             */
                            if (on(*tp, ISCHARMED) && save(VS_MAGIC, tp, 0)) {
                                msg("The eyes of %s turn clear.", 
                                    prname(mname, FALSE));
                                turn_off(*tp, ISCHARMED);
                                mname = monster_name(tp);
                            }
                        }

                        /*
                         * Let the defender know that the attacker has
                         * missiles!
                         */
                        if (ce(*tp->t_dest, shooter->t_pos))
                            tp->t_wasshot = TRUE;

                        used = TRUE;

                        /* Hit the monster -- does it do anything? */
                        if ((EQUAL(name,"ice")           && on(*tp, NOCOLD))  ||
                            (EQUAL(name,"flame")         && on(*tp, NOFIRE))  ||
                            (EQUAL(name,"acid")          && on(*tp, NOACID))  ||
                            (EQUAL(name,"lightning bolt")&& on(*tp,NOBOLT))   ||
                            (EQUAL(name,"nerve gas")     &&on(*tp,NOPARALYZE))||
                            (EQUAL(name,"sleeping gas")  &&
                             (on(*tp, NOSLEEP) || on(*tp, ISUNDEAD)))         ||
                            (EQUAL(name,"slow gas")      && on(*tp,NOSLOW))   ||
                            (EQUAL(name,"fear gas")      && on(*tp,NOFEAR))   ||
                            (EQUAL(name,"confusion gas") && on(*tp,ISCLEAR))  ||
                            (EQUAL(name,"chlorine gas")  && on(*tp,NOGAS))) {
                            if (see_monster)
                                msg("The %s has no effect on %s.",
                                        name, prname(mname, FALSE));
                        }

                        else {
                            see_him = !invisible(tp);
                           
                            /* Did a spell get disrupted? */
                            dsrpt_monster(tp, FALSE, see_him);

                            /* 
                             * Check for gas with special effects 
                             */
                            if (EQUAL(name, "nerve gas")) {
                                tp->t_no_move = movement(tp) * FREEZETIME;
                                tp->t_action = A_FREEZE;
                            }
                            else if (EQUAL(name, "sleeping gas")) {
                                tp->t_no_move = movement(tp) * SLEEPTIME;
                                tp->t_action = A_FREEZE;
                            }
                            else if (EQUAL(name, "slow gas")) {
                                if (on(*tp, ISHASTE))
                                    turn_off(*tp, ISHASTE);
                                else
                                    turn_on(*tp, ISSLOW);
                            }
                            else if (EQUAL(name, "fear gas")) {
                                turn_on(*tp, ISFLEE);
                                tp->t_dest = &hero;

                                /* It is okay to turn tail */
                                tp->t_oldpos = tp->t_pos;
                            }
                            else if (EQUAL(name, "confusion gas")) {
                                turn_on(*tp, ISHUH);
                                tp->t_dest = &hero;
                            }
                            else if ((EQUAL(name, "lightning bolt")) &&
                                     on(*tp, BOLTDIVIDE)) {
                                    if (creat_mons(tp, tp->t_index, FALSE)) {
                                      if (see_monster)
                                       msg("The %s divides %s.",
                                           name,prname(mname, FALSE));
                                      light(&hero);
                                    }
                                    else if (see_monster)
                                        msg("The %s has no effect on %s.",
                                            name, prname(mname, FALSE));
                            }
                            else {
                                if (save(VS_BREATH, tp,
                                         -(shooter->t_stats.s_lvl/10)))
                                    damage /= 2;

                                /* The poor fellow got killed! */
                                if ((tp->t_stats.s_hpt -= damage) <= 0) {
                                    if (see_monster)
                                        msg("The %s kills %s", 
                                            name, prname(mname, FALSE));
                                    else
                                     msg("You hear a faint groan in the distance");
                                    /*
                                     * Instead of calling killed() here, we
                                     * will record that the monster was killed
                                     * and call it at the end of the routine,
                                     * after we restore what was under the bolt.
                                     * We have to do this because in the case
                                     * of a bolt that first misses the monster
                                     * and then gets it on the bounce.  If we
                                     * call killed here, the 'missed' space in
                                     * spotpos puts the monster back on the
                                     * screen
                                     */
                                    target = item;
                                }
                                else {  /* Not dead, so just scream */
                                     if (!see_monster)
                                       msg("You hear a scream in the distance");
                                }
                            }
                        }
                    }
                    else if (isalpha(show(pos.y, pos.x))) {
                        if (see_monster) {
                            if (terse)
                                msg("%s misses", name);
                            else
                                msg("The %s whizzes past %s",
                                            name, prname(mname, FALSE));
                        }
                        if (get_points) runto(tp, &hero);
                    }
                }
                else if (pos.y == hero.y && pos.x == hero.x) {
at_hero:            if (!save(VS_BREATH, &player,
                                -(shooter->t_stats.s_lvl/10))){
                        if (terse)
                            msg("The %s hits you", name);
                        else
                            msg("You are hit by the %s", name);
                        used = TRUE;

                        /* 
                         * The Amulet of Yendor protects against all "breath" 
                         *
                         * The following two if statements could be combined 
                         * into one, but it makes the compiler barf, so split 
                         * it up
                         */
                        if (cur_relic[YENDOR_AMULET]                        ||
                            (EQUAL(name,"chlorine gas")&&on(player, NOGAS)) ||
                            (EQUAL(name,"acid")&&on(player, NOACID))        ||
                            (EQUAL(name,"sleeping gas")&&ISWEARING(R_ALERT))){
                             msg("The %s has no effect", name);
                        }
                        else if((EQUAL(name, "flame") && on(player, NOFIRE)) ||
                                (EQUAL(name, "ice")   && on(player, NOCOLD)) ||
                                (EQUAL(name,"lightning bolt")&& 
                                                         on(player,NOBOLT))  ||
                                (EQUAL(name,"fear gas")&&ISWEARING(R_HEROISM))){
                             msg("The %s has no effect", name);
                        }

                        else {
                            dsrpt_player();

                            /* 
                             * Check for gas with special effects 
                             */
                            if (EQUAL(name, "nerve gas")) {
                                msg("The nerve gas paralyzes you.");
                                player.t_no_move +=
                                        movement(&player) * FREEZETIME;
                                player.t_action = A_FREEZE;
                            }
                            else if (EQUAL(name, "sleeping gas")) {
                                msg("The sleeping gas puts you to sleep.");
                                player.t_no_move +=
                                        movement(&player) * SLEEPTIME;
                                player.t_action = A_FREEZE;
                            }
                            else if (EQUAL(name, "confusion gas")) {
                                if (off(player, ISCLEAR)) {
                                    if (on(player, ISHUH))
                                        lengthen(unconfuse,
                                                 rnd(20)+HUHDURATION);
                                    else {
                                        turn_on(player, ISHUH);
                                        fuse(unconfuse, NULL,
                                             rnd(20)+HUHDURATION, AFTER);
                                        msg("The confusion gas has confused you.");
                                    }
                                }
                                else msg("You feel dizzy for a moment, but it quickly passes.");
                            }
                            else if (EQUAL(name, "slow gas")) {
                                add_slow();
                            }
                            else if (EQUAL(name, "fear gas")) {
                                turn_on(player, ISFLEE);
                                player.t_dest = &shooter->t_pos;
                                msg("The fear gas terrifies you.");
                            }
                            else {
                                if (EQUAL(name, "acid")                 &&
                                    cur_armor != NULL                   &&
                                    !(cur_armor->o_flags & ISPROT)      &&
                                    !save(VS_BREATH, &player, -2)       &&
                                    cur_armor->o_ac < pstats.s_arm+1) {
                                       msg("Your armor corrodes from the acid");
                                       cur_armor->o_ac++;
                                }
                                if (save(VS_BREATH, &player,
                                         -(shooter->t_stats.s_lvl/10))  &&
                                         off(player, NOACID))
                                    damage /= 2;
                                if ((pstats.s_hpt -= damage) <= 0) 
                                    death(reason);
                            }
                        }
                    }
                    else
                        msg("The %s whizzes by you", name);
                }

                mvwaddch(cw, pos.y, pos.x, dirch);
                draw(cw);
        }

        pos.y += dir.y;
        pos.x += dir.x;
    }

    /* Restore what was under the bolt */
    newfont(cw);
    for (x = y - 1; x >= 0; x--)
        mvwaddch(cw, spotpos[x].place.y, spotpos[x].place.x, spotpos[x].oldch);

    /* If we killed something, do so now.  This will also blank the monster. */
    if (target) killed(target, FALSE, get_points, TRUE);
    return;
}