root/games/hack/hack.wizard.c
/*      $OpenBSD: hack.wizard.c,v 1.7 2016/01/09 18:33:15 mestre Exp $  */

/*
 * Copyright (c) 1985, Stichting Centrum voor Wiskunde en Informatica,
 * Amsterdam
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are
 * met:
 *
 * - Redistributions of source code must retain the above copyright notice,
 * this list of conditions and the following disclaimer.
 *
 * - Redistributions in binary form must reproduce the above copyright
 * notice, this list of conditions and the following disclaimer in the
 * documentation and/or other materials provided with the distribution.
 *
 * - Neither the name of the Stichting Centrum voor Wiskunde en
 * Informatica, nor the names of its contributors may be used to endorse or
 * promote products derived from this software without specific prior
 * written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
 * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
 * PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER
 * OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

/*
 * Copyright (c) 1982 Jay Fenlason <hack@gnu.org>
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. The name of the author may not be used to endorse or promote products
 *    derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
 * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
 * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL
 * THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

/* wizard code - inspired by rogue code from Merlyn Leroy (digi-g!brian) */

#include <stdlib.h>

#include "hack.h"

extern struct permonst pm_wizard;

static void clonewiz(struct monst *);

#define WIZSHOT     6   /* one chance in WIZSHOT that wizard will try magic */
#define BOLT_LIM    8   /* from this distance D and 1 will try to hit you */

char wizapp[] = "@DNPTUVXcemntx";

/* If he has found the Amulet, make the wizard appear after some time */
void
amulet(void)
{
        struct obj *otmp;
        struct monst *mtmp;

        if(!flags.made_amulet || !flags.no_of_wizards)
                return;
        /* find wizard, and wake him if necessary */
        for(mtmp = fmon; mtmp; mtmp = mtmp->nmon)
            if(mtmp->data->mlet == '1' && mtmp->msleep && !rn2(40))
                for(otmp = invent; otmp; otmp = otmp->nobj)
                    if(otmp->olet == AMULET_SYM && !otmp->spe) {
                        mtmp->msleep = 0;
                        if(dist(mtmp->mx,mtmp->my) > 2)
                            pline(
    "You get the creepy feeling that somebody noticed your taking the Amulet."
                            );
                        return;
                    }
}

int
wiz_hit(struct monst *mtmp)
{
        /* if we have stolen or found the amulet, we disappear */
        if(mtmp->minvent && mtmp->minvent->olet == AMULET_SYM &&
            mtmp->minvent->spe == 0) {
                /* vanish -- very primitive */
                fall_down(mtmp);
                return(1);
        }

        /* if it is lying around someplace, we teleport to it */
        if(!carrying(AMULET_OF_YENDOR)) {
            struct obj *otmp;

            for(otmp = fobj; otmp; otmp = otmp->nobj)
                if(otmp->olet == AMULET_SYM && !otmp->spe) {
                    if((u.ux != otmp->ox || u.uy != otmp->oy) &&
                       !m_at(otmp->ox, otmp->oy)) {

                        /* teleport to it and pick it up */
                        mtmp->mx = otmp->ox;
                        mtmp->my = otmp->oy;
                        freeobj(otmp);
                        mpickobj(mtmp, otmp);
                        pmon(mtmp);
                        return(0);
                    }
                    goto hithim;
                }
            return(0);                          /* we don't know where it is */
        }
hithim:
        if(rn2(2)) {                            /* hit - perhaps steal */

            /* if hit 1/20 chance of stealing amulet & vanish
                - amulet is on level 26 again. */
            if(hitu(mtmp, d(mtmp->data->damn,mtmp->data->damd))
                && !rn2(20) && stealamulet(mtmp))
                ;
        }
        else
            inrange(mtmp);                      /* try magic */
        return(0);
}

void
inrange(struct monst *mtmp)
{
        schar tx,ty;

        /* do nothing if cancelled (but make '1' say something) */
        if(mtmp->data->mlet != '1' && mtmp->mcan)
                return;

        /* spit fire only when both in a room or both in a corridor */
        if(inroom(u.ux,u.uy) != inroom(mtmp->mx,mtmp->my)) return;
        tx = u.ux - mtmp->mx;
        ty = u.uy - mtmp->my;
        if((!tx && abs(ty) < BOLT_LIM) || (!ty && abs(tx) < BOLT_LIM)
            || (abs(tx) == abs(ty) && abs(tx) < BOLT_LIM)){
            switch(mtmp->data->mlet) {
            case 'D':
                /* spit fire in the direction of @ (not nec. hitting) */
                buzz(-1,mtmp->mx,mtmp->my,sgn(tx),sgn(ty));
                break;
            case '1':
                if(rn2(WIZSHOT)) break;
                /* if you zapped wizard with wand of cancellation,
                he has to shake off the effects before he can throw
                spells successfully.  1/2 the time they fail anyway */
                if(mtmp->mcan || rn2(2)) {
                    if(canseemon(mtmp))
                        pline("%s makes a gesture, then curses.",
                            Monnam(mtmp));
                    else
                        pline("You hear mumbled cursing.");
                    if(!rn2(3)) {
                        mtmp->mspeed = 0;
                        mtmp->minvis = 0;
                    }
                    if(!rn2(3))
                        mtmp->mcan = 0;
                } else {
                    if(canseemon(mtmp)){
                        if(!rn2(6) && !Invis) {
                            pline("%s hypnotizes you.", Monnam(mtmp));
                            nomul(rn2(3) + 3);
                            break;
                        } else
                            pline("%s chants an incantation.",
                                Monnam(mtmp));
                    } else
                            pline("You hear a mumbled incantation.");
                    switch(rn2(Invis ? 5 : 6)) {
                    case 0:
                        /* create a nasty monster from a deep level */
                        /* (for the moment, 'nasty' is not implemented) */
                        (void) makemon((struct permonst *)0, u.ux, u.uy);
                        break;
                    case 1:
                        pline("\"Destroy the thief, my pets!\"");
                        aggravate();    /* aggravate all the monsters */
                        /* fall into next case */
                    case 2:
                        if (flags.no_of_wizards == 1 && rnd(5) == 0)
                            /* if only 1 wizard, clone himself */
                            clonewiz(mtmp);
                        break;
                    case 3:
                        if(mtmp->mspeed == MSLOW)
                                mtmp->mspeed = 0;
                        else
                                mtmp->mspeed = MFAST;
                        break;
                    case 4:
                        mtmp->minvis = 1;
                        break;
                    case 5:
                        /* Only if not Invisible */
                        pline("You hear a clap of thunder!");
                        /* shoot a bolt of fire or cold, or a sleep ray */
                        buzz(-rnd(3),mtmp->mx,mtmp->my,sgn(tx),sgn(ty));
                        break;
                    }
                }
            }
            if(u.uhp < 1) done_in_by(mtmp);
        }
}

void
aggravate(void)
{
        struct monst *mtmp;

        for(mtmp = fmon; mtmp; mtmp = mtmp->nmon) {
                mtmp->msleep = 0;
                if(mtmp->mfroz && !rn2(5))
                        mtmp->mfroz = 0;
        }
}

static void
clonewiz(struct monst *mtmp)
{
        struct monst *mtmp2;

        if ((mtmp2 = makemon(PM_WIZARD, mtmp->mx, mtmp->my))) {
                flags.no_of_wizards = 2;
                unpmon(mtmp2);
                mtmp2->mappearance = wizapp[rn2(sizeof(wizapp)-1)];
                pmon(mtmp);
        }
}