server/server/spell_effect.C

/*
 * static char *rcsid_spell_effect_c =
 *   "$Id: spell_effect.C,v 1.2 2006-08-17 20:23:32 root Exp $";
 */


/*
    CrossFire, A Multiplayer game for X-windows

    Copyright (C) 2002 Mark Wedel & Crossfire Development Team
    Copyright (C) 1992 Frank Tore Johansen

    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation; either version 2 of the License, or
    (at your option) any later version.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with this program; if not, write to the Free Software
    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.

    The authors can be reached via e-mail at crossfire-devel@real-time.com
*/

#include <global.h>
#include <object.h>
#include <living.h>
#ifndef __CEXTRACT__
#include <sproto.h>
#endif
#include <spells.h>
#include <sounds.h>

/* cast_magic_storm: This is really used mostly for spell
 * fumbles at the like.  tmp is the object to propogate.
 * op is what is casting this.
 */
void cast_magic_storm(object *op, object *tmp, int lvl)
{
    if (!tmp) return;   /* error */
    tmp->level=op->level;
    tmp->x=op->x;
    tmp->y=op->y; 
    tmp->range+=lvl/5;  /* increase the area of destruction */
    tmp->duration+=lvl/5;

    /* Put a cap on duration for this - if the player fails in their
     * apartment, don't want it to go on so long that it kills them
     * multiple times.  Also, damge already increases with level,
     * so don't really need to increase the duration as much either.
     */
    if (tmp->duration>=40) tmp->duration=40;
    tmp->stats.dam=lvl; /* nasty recoils! */
    tmp->stats.maxhp=tmp->count; /* tract single parent */ 
    insert_ob_in_map(tmp,op->map,op,0);

}


int recharge(object *op, object *caster, object *spell_ob) {
    object *wand, *tmp;
    int ncharges;

    wand = find_marked_object(op);
    if(wand == NULL || wand->type != WAND) {
        new_draw_info(NDI_UNIQUE, 0, op, "You need to mark the wand you want to recharge.");
        return 0;
    }
    if(!(random_roll(0, 3, op, PREFER_HIGH))) {
        new_draw_info_format(NDI_UNIQUE, 0, op,
                             "The %s vibrates violently, then explodes!",query_name(wand));
        play_sound_map(op->map, op->x, op->y, SOUND_OB_EXPLODE);
        esrv_del_item(op->contr, wand->count);
        remove_ob(wand);
        free_object(wand);
        tmp = get_archetype("fireball");
        tmp->stats.dam = (spell_ob->stats.dam + SP_level_dam_adjust(caster, spell_ob)) / 10;
        if (!tmp->stats.dam) tmp->stats.dam = 1;
        tmp->stats.hp = tmp->stats.dam / 2;
        if (tmp->stats.hp < 2) tmp->stats.hp = 2;
        tmp->x = op->x;
        tmp->y = op->y;
        insert_ob_in_map(tmp, op->map, NULL, 0);
        return 1;
    }

    ncharges = (spell_ob->stats.dam + SP_level_dam_adjust(caster, spell_ob));
    if (wand->inv && wand->inv->level)
        ncharges /= wand->inv->level;
    else {
        new_draw_info_format(NDI_UNIQUE, 0, op, "Your %s is broken.",
                             query_name(wand));
        return 0;
    }
    if (!ncharges) ncharges = 1;

    wand->stats.food += ncharges;
    new_draw_info_format(NDI_UNIQUE, 0, op,
        "The %s glows with power.",query_name(wand));
    if(wand->arch && QUERY_FLAG(&wand->arch->clone, FLAG_ANIMATE)) {
        SET_FLAG(wand, FLAG_ANIMATE);
        wand->speed = wand->arch->clone.speed;
        update_ob_speed(wand);
    }
    return 1;
}

/* Create a missile (nonmagic - magic +4). Will either create bolts or arrows
 * based on whether a crossbow or bow is equiped. If neither, it defaults to
 * arrows.
 * Sets the plus based on the casters level. It is also settable with the
 * invoke command. If the caster attempts to create missiles with too
 * great a plus, the default is used.
 * The # of arrows created also goes up with level, so if a 30th level mage
 * wants LOTS of arrows, and doesn't care what the plus is he could
 * create nonnmagic arrows, or even -1, etc...
 */

int cast_create_missile(object *op, object *caster,object *spell, int dir, const char *stringarg)
{
    int missile_plus=0, bonus_plus=0;
    const char *missile_name;
    object *tmp, *missile;
    tag_t tag;

    missile_name = "arrow";

    for (tmp=op->inv; tmp != NULL; tmp=tmp->below)
        if (tmp->type == BOW && QUERY_FLAG(tmp, FLAG_APPLIED)) {
            missile_name=tmp->race;
        }

    missile_plus = spell->stats.dam  + SP_level_dam_adjust(caster, spell);

    if (find_archetype(missile_name)==NULL) {
        LOG(llevDebug, "Cast create_missile: could not find archetype %s\n", 
            missile_name);
        return 0;
    }
    missile = get_archetype(missile_name);

    if (stringarg) {
        /* If it starts with a letter, presume it is a description */
        if (isalpha(*stringarg)) {
            artifact *al = find_artifactlist(missile->type)->items;

            for ( ; al != NULL; al=al->next) 
                if (!strcasecmp(al->item->name, stringarg)) break;

            if (!al) {
                free_object(missile);
                new_draw_info_format(NDI_UNIQUE, 0, op ,"No such object %ss of %s", missile_name,
                                     stringarg);
                return 0;
            }
            if (al->item->slaying) {
                free_object(missile);
                new_draw_info_format(NDI_UNIQUE, 0, op ,"You are not allowed to create %ss of %s", 
                                     missile_name, stringarg);
                return 0;
            }
            give_artifact_abilities(missile, al->item);
            /* These special arrows cost something extra.  Don't have them also be magical -
             * otherwise, in most cases, not enough will be created.  I don't want to get into
             * the parsing of having to do both plus and type.
             */
            bonus_plus = 1 + (al->item->value / 5);
            missile_plus=0;
        } else
            if (atoi(stringarg) < missile_plus)
                missile_plus = atoi(stringarg);
    }
    if (missile_plus > 4)
        missile_plus = 4;
    else if (missile_plus < -4)
        missile_plus = -4;

    missile->nrof = spell->duration + SP_level_duration_adjust(caster, spell);
    missile->nrof -= 3 * (missile_plus + bonus_plus);
    if (missile->nrof < 1)
        missile->nrof=1;

    missile->magic = missile_plus;
    /* Can't get any money for these objects */
    missile->value=0;

    SET_FLAG(missile, FLAG_IDENTIFIED);
    tag = missile->count;

    if ( ! cast_create_obj (op, caster, missile, dir) && op->type == PLAYER
      && ! was_destroyed (missile, tag)) 
    {
        pick_up(op, missile);
    }
    return 1;
}


/*  allows the choice of what sort of food object to make.
 *  If stringarg is NULL, it will create food dependent on level  --PeterM*/
int cast_create_food(object *op,object *caster, object *spell_ob, int dir, const char *stringarg)
{
    int food_value;
    archetype *at=NULL;
    object *new_op;

    food_value=spell_ob->stats.food + 
              + 50 * SP_level_duration_adjust(caster,spell_ob);

    if(stringarg) {
        at = find_archetype_by_object_type_name(FOOD, stringarg);
        if (at == NULL)
            at = find_archetype_by_object_type_name(DRINK, stringarg);
        if (at == NULL || at->clone.stats.food > food_value)
            stringarg = NULL;
    }
  
    if(!stringarg) {
        archetype *at_tmp;

        /* We try to find the archetype with the maximum food value.
         * This removes the dependancy of hard coded food values in this
         * function, and addition of new food types is automatically added.
         * We don't use flesh types because the weight values of those need
         * to be altered from the donor.
         */

        /* We assume the food items don't have multiple parts */
        for (at_tmp=first_archetype; at_tmp!=NULL; at_tmp=at_tmp->next) {
            if (at_tmp->clone.type==FOOD || at_tmp->clone.type==DRINK) {
                /* Basically, if the food value is something that is creatable
                 * under the limits of the spell and it is higher than
                 * the item we have now, take it instead.
                 */
                if (at_tmp->clone.stats.food<=food_value && 
                    (!at || at_tmp->clone.stats.food>at->clone.stats.food))
                        at=at_tmp;
            }
        }
    }
    /* Pretty unlikely (there are some very low food items), but you never
     * know
     */
    if (!at) {
        new_draw_info(NDI_UNIQUE, 0, op, "You don't have enough experience to create any food.");
        return 0;
    }

    food_value/=at->clone.stats.food;
    new_op = arch_to_object (at);
    new_op->nrof = food_value;

    new_op->value = 0;
    if (new_op->nrof<1) new_op->nrof = 1;

    cast_create_obj(op, caster,new_op, dir);
    return 1;
}
  
int probe(object *op, object *caster, object *spell_ob, int dir) {
    int r, mflags, maxrange;
    object *tmp;
    mapstruct *m;


    if(!dir) {
        examine_monster(op,op);
        return 1;
    }
    maxrange = spell_ob->range + SP_level_range_adjust(caster, spell_ob);
    for(r=1;r < maxrange; r++) {
        sint16 x=op->x+r*freearr_x[dir],y=op->y+r*freearr_y[dir];

        m = op->map;
        mflags = get_map_flags(m, &m, x, y, &x, &y);

        if (mflags & P_OUT_OF_MAP) break;

        if (!QUERY_FLAG(op, FLAG_WIZCAST) && (mflags & P_NO_MAGIC)) {
            new_draw_info(NDI_UNIQUE, 0,op,"Something blocks your magic.");
            return 0;
        }
        if (mflags & P_IS_ALIVE) {
            for(tmp=get_map_ob(m,x,y);tmp!=NULL;tmp=tmp->above)
                if(QUERY_FLAG(tmp, FLAG_ALIVE)&&(tmp->type==PLAYER||QUERY_FLAG(tmp, FLAG_MONSTER))) {
                    new_draw_info(NDI_UNIQUE, 0,op,"You detect something.");
                    if(tmp->head!=NULL)
                        tmp=tmp->head;
                    examine_monster(op,tmp);
                    return 1;
                }
        }
    }
    new_draw_info(NDI_UNIQUE, 0,op,"You detect nothing.");
    return 1;
}


/* This checks to see if 'pl' is invisible to 'mon'.
 * does race check, undead check, etc
 * Returns TRUE if mon can't see pl, false
 * otherwise.  This doesn't check range, walls, etc.  It
 * only checks the racial adjustments, and in fact that
 * pl is invisible.
 */
int makes_invisible_to(object *pl, object *mon)
{

    if (!pl->invisible) return 0;
    if (pl->type == PLAYER ) {
        /* If race isn't set, then invisible unless it is undead */
        if (!pl->contr->invis_race) {
            if (QUERY_FLAG(mon, FLAG_UNDEAD)) return 0;
            return 1;
        }
        /* invis_race is set if we get here */
        if (!strcmp(pl->contr->invis_race, "undead") && is_true_undead(mon))
            return 1;
        /* No race, can't be invisible to it */
        if (!mon->race) return 0;
        if (strstr(mon->race, pl->contr->invis_race)) return 1;
        /* Nothing matched above, return 0 */
        return 0;
    } else {
        /* monsters are invisible to everything */
        return 1;
    }
}

/* Makes the player or character invisible.
 * Note the spells to 'stack', but perhaps in odd ways.
 * the duration for all is cumulative.
 * In terms of invis undead/normal invis, it is the last one cast that
 * will determine if you are invisible to undead or normal monsters.
 * For improved invis, if you cast it with a one of the others, you
 * lose the improved part of it, and the above statement about undead/
 * normal applies.
 */
int cast_invisible(object *op, object *caster, object *spell_ob) {
    object *tmp;

    if(op->invisible>1000) {
        new_draw_info(NDI_UNIQUE, 0,op,"You can not extend the duration of your invisibility any further");
        return 0;
    }

    /* Remove the switch with 90% duplicate code - just handle the differences with
     * and if statement or two.
     */
    op->invisible += spell_ob->duration + SP_level_duration_adjust(caster, spell_ob);
    /* max duration */
    if(op->invisible>1000) op->invisible = 1000;

    if (op->type == PLAYER) {
        if (op->contr->invis_race) FREE_AND_CLEAR_STR(op->contr->invis_race);
        if (spell_ob->race)
            op->contr->invis_race = add_refcount(spell_ob->race);
        if (QUERY_FLAG(spell_ob, FLAG_MAKE_INVIS))
            op->contr->tmp_invis=0;
        else
            op->contr->tmp_invis=1;

        op->contr->hidden = 0;
    }
    if (makes_invisible_to(op, op)) 
        new_draw_info(NDI_UNIQUE, 0,op,"You can't see your hands!");
    else 
        new_draw_info(NDI_UNIQUE, 0,op,"You feel more transparent!");

    update_object(op,UP_OBJ_FACE);

    /* Only search the active objects - only these should actually do
     * harm to the player.
     */
    for (tmp = active_objects; tmp != NULL; tmp = tmp->active_next)
        if (tmp->enemy == op)
            tmp->enemy = NULL;
    return 1;
}

/* earth to dust spell.  Basically destroys earthwalls in the area.
 */
int cast_earth_to_dust(object *op,object *caster, object *spell_ob) {
    object *tmp, *next;
    int range,i,j, mflags;
    sint16 sx, sy;
    mapstruct *m;

    if(op->type!=PLAYER)
        return 0;

    range=spell_ob->range + SP_level_range_adjust(caster, spell_ob);

    for(i= -range;i<=range;i++)
        for(j= -range;j<=range;j++) {
            sx = op->x + i;
            sy = op->y + j;
            m = op->map;
            mflags = get_map_flags(m, &m, sx, sy, &sx, &sy);

            if (mflags & P_OUT_OF_MAP) continue;

            // earth to dust tears down everything that can be teared down
            for (tmp = get_map_ob(m, sx, sy); tmp != NULL; tmp = next)
              {
                next = tmp->above;
                if (QUERY_FLAG (tmp, FLAG_TEAR_DOWN))
                  hit_player (tmp, 9998, op, AT_PHYSICAL, 0);
              }
        }
    return 1;
}


void execute_word_of_recall(object *op) {
    object *wor=op;
    while(op!=NULL && op->type!=PLAYER)
        op=op->env;

    if(op!=NULL && op->map) {
        if ((get_map_flags(op->map, NULL, op->x, op->y, NULL, NULL) & P_NO_CLERIC) && (!QUERY_FLAG(op,FLAG_WIZCAST)))
            new_draw_info(NDI_UNIQUE, 0,op,"You feel something fizzle inside you.");
        else
            enter_exit(op,wor);
    }
    remove_ob(wor);
    free_object(wor);
}

/* Word of recall causes the player to return 'home'.
 * we put a force into the player object, so that there is a 
 * time delay effect.
 */
int cast_word_of_recall(object *op, object *caster, object *spell_ob) {
    object *dummy;
    int time;

    if(op->type!=PLAYER)
        return 0;

    if (find_obj_by_type_subtype(op,SPELL_EFFECT, SP_WORD_OF_RECALL))
    {
        new_draw_info(NDI_UNIQUE, 0, op, "You feel a force starting to build up inside you." );
        return 1;
    }

    dummy=get_archetype(FORCE_NAME);
    if(dummy == NULL){
        new_draw_info(NDI_UNIQUE, 0,op,"Oops, program error!");
        LOG(llevError,"cast_word_of_recall: get_archetype(force) failed!\n");
        return 0;
    }
    time = spell_ob->duration - SP_level_duration_adjust(caster, spell_ob);
    if (time <1 ) time=1;

    /* value of speed really doesn't make much difference, as long as it is
     * positive.  Lower value may be useful so that the problem doesn't
     * do anything really odd if it say a -1000 or something.
     */
    dummy->speed = 0.002;
    update_ob_speed(dummy);
    dummy->speed_left = -dummy->speed * time;
    dummy->type=SPELL_EFFECT;
    dummy->subtype = SP_WORD_OF_RECALL;

    /* If we could take advantage of enter_player_savebed() here, it would be
     * nice, but until the map load fails, we can't.
     */
    EXIT_PATH(dummy) = add_string(op->contr->savebed_map);
    EXIT_X(dummy) = op->contr->bed_x;
    EXIT_Y(dummy) = op->contr->bed_y;
  
    (void) insert_ob_in_ob(dummy,op);
    new_draw_info(NDI_UNIQUE, 0,op,"You feel a force starting to build up inside you.");
    return 1;
}

/* cast_wonder
 * wonder is really just a spell that will likely cast another
 * spell.
 */
int cast_wonder(object *op, object *caster, int dir, object *spell_ob) {
    object *newspell;

    if(!rndm(0, 3))
        return cast_cone(op,caster,dir, spell_ob);

    if (spell_ob->randomitems) {
        newspell = generate_treasure(spell_ob->randomitems, caster->level);
        if (!newspell) {
            LOG(llevError,"cast_wonder: Unable to get a spell!\n");
            return 0;
        }
        if (newspell->type != SPELL) {
            LOG(llevError,"cast_wonder: spell returned is not a spell (%d, %s)!\n",
                newspell->type, newspell->name);
            return 0;
        }
        /* Prevent inifinit recursion */
        if (newspell->subtype == SP_WONDER) {
            LOG(llevError,"cast_wonder: spell returned is another wonder spell!\n");
            return 0;
        }
        return cast_spell(op,caster,dir,newspell, NULL);
    }
    return 1;
}


int perceive_self(object *op) {
    char *cp=describe_item(op, op), buf[MAX_BUF];
    archetype *at=find_archetype(ARCH_DEPLETION);
    object *tmp;
    int i;

    tmp=find_god(determine_god(op));
    if (tmp) 
        new_draw_info_format(NDI_UNIQUE, 0, op, "You worship %s", tmp->name);
    else
        new_draw_info(NDI_UNIQUE, 0,op,"You worship no god");

    tmp=present_arch_in_ob(at,op);

    if(*cp=='\0' && tmp==NULL)
        new_draw_info(NDI_UNIQUE, 0,op,"You feel very mundane");
    else {
        new_draw_info(NDI_UNIQUE, 0,op,"You have:");
        new_draw_info(NDI_UNIQUE, 0,op,cp);
        if (tmp!=NULL) {
            for (i=0; i<NUM_STATS; i++) {
                if (get_attr_value(&tmp->stats, i)<0) {
                    new_draw_info_format(NDI_UNIQUE, 0,op, 
                         "Your %s is depleted by %d", statname[i],
                            -(get_attr_value(&tmp->stats,i)));
                }
            }
        }
    }

    if (is_dragon_pl(op)) {
       /* now grab the 'dragon_ability'-force from the player's inventory */
        for (tmp = op->inv; tmp != NULL; tmp = tmp->below) {
            if (tmp->type == FORCE && !strcmp(tmp->arch->name, "dragon_ability_force")) {
                if(tmp->stats.exp == 0) {
                    sprintf(buf, "Your metabolism isn't focused on anything.");
                } else {
                    sprintf(buf, "Your metabolism is focused on %s.", change_resist_msg[tmp->stats.exp]);
                }
                new_draw_info(NDI_UNIQUE, 0,op, buf);
                break;
            }
        }
    }
    return 1;
}

/* int cast_create_town_portal (object *op, object *caster, int dir)
 *
 * This function cast the spell of town portal for op
 *
 * The spell operates in two passes. During the first one a place
 * is marked as a destination for the portal. During the second one,
 * 2 portals are created, one in the position the player cast it and
 * one in the destination place. The portal are synchronized and 2 forces
 * are inserted in the player to destruct the portal next time player
 * creates a new portal pair.
 * This spell has a side effect that it allows people to meet each other
 * in a permanent, private,  appartements by making a town portal from it
 * to the town or another public place. So, check if the map is unique and if
 * so return an error
 *
 * Code by Tchize (david.delbecq@usa.net)
 */
int cast_create_town_portal (object *op, object *caster, object *spell, int dir)
{
    object *dummy, *force, *old_force, *tmp;
    archetype *perm_portal;
    char portal_name [1024], portal_message [1024];
    sint16 exitx, exity;
    mapstruct *exitmap;
    int op_level;


    /* Check to see if the map the player is currently on is a per player unique
     * map.  This can be determined in that per player unique maps have the
     * full pathname listed.
     */
    if (!strncmp(op->map->path, settings.localdir, strlen(settings.localdir)) &&
                    settings.create_home_portals != TRUE )
    {
            new_draw_info(NDI_UNIQUE | NDI_NAVY, 0,op,"You can't cast that here.\n");
            return 0;
    }

    /* Check to see if the player is on a transport */
    if (op->contr && op->contr->transport) {
       new_draw_info(NDI_UNIQUE | NDI_NAVY, 0,op,"You need to exit the transport to cast that.\n");
       return 0;
    }
    
    /* The first thing to do is to check if we have a marked destination
     * dummy is used to make a check inventory for the force
     */
    dummy=arch_to_object(spell->other_arch);
    if(dummy == NULL){
        new_draw_info(NDI_UNIQUE, 0,op,"Oops, program error!");
        LOG(llevError,"get_object failed (force in cast_create_town_portal for %s!\n",op->name);
        return 0;
    }
    force=check_inv_recursive (op,dummy);

    if (force==NULL) {
        /* Here we know there is no destination marked up.
         * We have 2 things to do:
         * 1. Mark the destination in the player inventory.
         * 2. Let the player know it worked.
         */
        free_string (dummy->name);
        dummy->name = add_string (op->map->path);
        EXIT_X(dummy)= op->x;
        EXIT_Y(dummy)= op->y;
        insert_ob_in_ob (dummy,op);
        new_draw_info(NDI_UNIQUE | NDI_NAVY, 0,op,"You fix this place in your mind.\nYou feel you are able to come here from anywhere.");
        return 1;
    }
    free_object (dummy);

    /* Here we know where the town portal should go to
     * We should kill any existing portal associated with the player.
     * Than we should create the 2 portals.
     * For each of them, we need:
     *    - To create the portal with the name of the player+destination map
     *    - set the owner of the town portal
     *    - To mark the position of the portal in the player's inventory
     *      for easier destruction. 
     *
     *  The mark works has follow:
     *   slaying: Existing town portal
     *   hp, sp : x & y of the associated portal
     *   name   : name of the portal
     *   race   : map the portal is in
     */

    /* First step: killing existing town portals */
    dummy=get_archetype(spell->race);
    if(dummy == NULL){
        new_draw_info(NDI_UNIQUE, 0,op,"Oops, program error!");
        LOG(llevError,"get_object failed (force) in cast_create_town_portal for %s!\n",op->name);
        return 0;
    }
    perm_portal = find_archetype (spell->slaying);

    /* To kill a town portal, we go trough the player's inventory,
     * for each marked portal in player's inventory,
     *   -We try load the associated map (if impossible, consider the portal destructed)
     *   -We find any portal in the specified location.
     *      If it has the good name, we destruct it.
     *   -We destruct the force indicating that portal.
     */
    while ( (old_force=check_inv_recursive (op,dummy))) {
        exitx=EXIT_X(old_force);
        exity=EXIT_Y(old_force);
        LOG (llevDebug,"Trying to kill a portal in %s (%d,%d)\n",old_force->race,exitx,exity);

        if (!strncmp(old_force->race, settings.localdir, strlen(settings.localdir))) 
            exitmap = ready_map_name(old_force->race, MAP_PLAYER_UNIQUE);
        else exitmap = ready_map_name(old_force->race, 0);

        if (exitmap) {
            tmp=present_arch (perm_portal,exitmap,exitx,exity);
            while (tmp) {
                if (tmp->name == old_force->name) {
                    remove_ob (tmp);
                    free_object (tmp);
                    break;
                } else {
                    tmp = tmp->above;
                }
            }
        }
        remove_ob (old_force);
        free_object (old_force);
        LOG (llevDebug,"\n");
    }
    free_object (dummy);

    /* Creating the portals.
     * The very first thing to do is to ensure
     * access to the destination map.
     * If we can't, don't fizzle. Simply warn player.
     * This ensure player pays his mana for the spell
     * because HE is responsible of forgotting.
     * 'force' is the destination of the town portal, which we got
     * from the players inventory above.
     */

    /* Ensure exit map is loaded*/
    if (!strncmp(force->name, settings.localdir, strlen(settings.localdir)))
        exitmap = ready_map_name(force->name, MAP_PLAYER_UNIQUE);
    else
        exitmap = ready_map_name(force->name, 0);

    /* If we were unable to load (ex. random map deleted), warn player*/
    if (exitmap==NULL) {
        new_draw_info(NDI_UNIQUE | NDI_NAVY, 0,op,"Something strange happens.\nYou can't remember where to go!?");
        remove_ob(force);
        free_object(force);
        return 1;
    }

    op_level = caster_level(caster, spell);
    if (op_level<15)
         snprintf (portal_message,1024,"\nThe air moves around you and\na huge smell of ammonia\nsurounds you as you pass\nthrough %s's tiny portal\nPouah!\n",op->name);
    else if (op_level<30)
         snprintf (portal_message,1024,"\n%s's portal smells of ozone.\nYou do a lot of movements and finally pass\nthrough the small hole in the air\n",op->name);
    else if (op_level<60)
         snprintf (portal_message,1024,"\nA shining door opens in the air in front of you,\nshowing you the path to another place.\n");
    else snprintf (portal_message,1024,"\nAs you walk through %s's portal, flowers come out\nfrom the ground around you.\nYou feel awed.\n",op->name);

    /* Create a portal in front of player
     * dummy contain the portal and
     * force contain the track to kill it later
     */

    snprintf (portal_name,1024,"%s's portal to %s",op->name,force->name);
    dummy=get_archetype(spell->slaying); /*The portal*/
    if(dummy == NULL) {
        new_draw_info(NDI_UNIQUE, 0,op,"Oops, program error!");
        LOG(llevError,"get_object failed (perm_magic_portal) in cast_create_town_portal for %s!\n",op->name);
        return 0;
    }
    EXIT_PATH(dummy) = add_string (force->name);
    EXIT_X(dummy)=EXIT_X(force);
    EXIT_Y(dummy)=EXIT_Y(force);
    FREE_AND_COPY(dummy->name, portal_name);
    FREE_AND_COPY(dummy->name_pl, portal_name);
    dummy->msg=add_string (portal_message);
    dummy->race=add_string (op->name);  /*Save the owner of the portal*/
    cast_create_obj (op, caster, dummy, 0);

    /* Now we need to to create a town portal marker inside the player
     * object, so on future castings, we can know that he has an active
     * town portal.
     */
    tmp=get_archetype(spell->race);
    if(tmp == NULL){
        new_draw_info(NDI_UNIQUE, 0,op,"Oops, program error!");
        LOG(llevError,"get_object failed (force) in cast_create_town_portal for %s!\n",op->name);
        return 0;
    }
    tmp->race=add_string (op->map->path);
    FREE_AND_COPY(tmp->name, portal_name);
    EXIT_X(tmp)=dummy->x;
    EXIT_Y(tmp)=dummy->y;
    insert_ob_in_ob (tmp,op);

    /* Create a portal in the destination map
     * dummy contain the portal and
     * force the track to kill it later
     * the 'force' variable still contains the 'reminder' of
     * where this portal goes to.
     */
    snprintf (portal_name,1024,"%s's portal to %s",op->name,op->map->path);
    dummy=get_archetype (spell->slaying); /*The portal*/
    if(dummy == NULL) {
        new_draw_info(NDI_UNIQUE, 0,op,"Oops, program error!");
        LOG(llevError,"get_object failed (perm_magic_portal) in cast_create_town_portal for %s!\n",op->name);
        return 0;
    }
    EXIT_PATH(dummy) = add_string (op->map->path);
    EXIT_X(dummy)=op->x;
    EXIT_Y(dummy)=op->y;
    FREE_AND_COPY(dummy->name, portal_name);
    FREE_AND_COPY(dummy->name_pl, portal_name);
    dummy->msg=add_string (portal_message);
    dummy->x=EXIT_X(force);
    dummy->y=EXIT_Y(force);
    dummy->race=add_string (op->name);  /*Save the owner of the portal*/
    insert_ob_in_map(dummy,exitmap,op,0);

    /* Now we create another town portal marker that
     * points back to the one we just made
     */
    tmp=get_archetype(spell->race);
    if(tmp == NULL){
        new_draw_info(NDI_UNIQUE, 0,op,"Oops, program error!");
        LOG(llevError,"get_object failed (force) in cast_create_town_portal for %s!\n",op->name);
        return 0;
    }
    tmp->race=add_string(force->name);
    FREE_AND_COPY(tmp->name, portal_name);
    EXIT_X(tmp)=dummy->x;
    EXIT_Y(tmp)=dummy->y;
    insert_ob_in_ob (tmp,op);

    /* Describe the player what happened
     */
    new_draw_info(NDI_UNIQUE | NDI_NAVY, 0,op,"You see air moving and showing you the way home.");
    remove_ob(force); /* Delete the force inside the player*/
    free_object(force);
    return 1;
}


/* This creates magic walls.  Really, it can create most any object,
 * within some reason.
 */

int magic_wall(object *op,object *caster,int dir,object *spell_ob) {
    object *tmp, *tmp2;  
    int i,posblocked,negblocked, maxrange;
    sint16 x, y;
    mapstruct *m;
    const char *name;
    archetype *at;

    if(!dir) {
        dir=op->facing;
        x = op->x;
        y = op->y;
    } else {
        x = op->x+freearr_x[dir];
        y = op->y+freearr_y[dir];
    }
    m = op->map;

    if ((spell_ob->move_block || x != op->x || y != op->y) &&
      (get_map_flags(m, &m, x, y, &x, &y) & (P_OUT_OF_MAP|P_IS_ALIVE) ||
      ((spell_ob->move_block & GET_MAP_MOVE_BLOCK(m, x, y)) == spell_ob->move_block))) {
        new_draw_info(NDI_UNIQUE, 0,op,"Something is in the way.");
        return 0;
    }
    if (spell_ob->other_arch) {
        tmp = arch_to_object(spell_ob->other_arch);
    } else if (spell_ob->race) {
        char buf1[MAX_BUF];

        sprintf(buf1,spell_ob->race,dir);
        at = find_archetype(buf1);
        if (!at) {
            LOG(llevError, "summon_wall: Unable to find archetype %s\n", buf1);
            new_draw_info(NDI_UNIQUE, 0,op,"This spell is broken.");
            return 0;
        }
        tmp = arch_to_object(at);
    } else {
        LOG(llevError,"magic_wall: spell %s lacks other_arch\n",
            spell_ob->name);
        return 0;
    }

    if (tmp->type == SPELL_EFFECT) {
        tmp->attacktype = spell_ob->attacktype;
        tmp->duration = spell_ob->duration +
            SP_level_duration_adjust(caster, spell_ob);
        tmp->stats.dam = spell_ob->stats.dam +
            SP_level_dam_adjust(caster, spell_ob);
        tmp->range = 0;
    } else if (QUERY_FLAG(tmp, FLAG_ALIVE)) {
        tmp->stats.hp = spell_ob->duration +
            SP_level_duration_adjust(caster, spell_ob);
        tmp->stats.maxhp = tmp->stats.hp;
        set_owner(tmp,op);
        set_spell_skill(op, caster, spell_ob, tmp);
    }
    if (QUERY_FLAG(spell_ob, FLAG_IS_USED_UP) || QUERY_FLAG(tmp, FLAG_IS_USED_UP)) {
        tmp->stats.food = spell_ob->duration +
            SP_level_duration_adjust(caster, spell_ob);
        SET_FLAG(tmp, FLAG_IS_USED_UP);
    }
    if (QUERY_FLAG(spell_ob, FLAG_TEAR_DOWN)) {
        tmp->stats.hp = spell_ob->stats.dam + SP_level_dam_adjust(caster, spell_ob);
        tmp->stats.maxhp = tmp->stats.hp;
        SET_FLAG(tmp, FLAG_TEAR_DOWN);
        SET_FLAG(tmp, FLAG_ALIVE);
    }

    /* This can't really hurt - if the object doesn't kill anything,
     * these fields just won't be used.
     */
    set_owner(tmp,op);
    set_spell_skill(op, caster, spell_ob, tmp);
    tmp->x = x;
    tmp->y = y;
    tmp->level = caster_level(caster, spell_ob) / 2;

    name = tmp->name;
    if ((tmp = insert_ob_in_map (tmp, m, op,0)) == NULL) {
        new_draw_info_format(NDI_UNIQUE, 0,op,"Something destroys your %s", name);
        return 0;
    }
    /* If this is a spellcasting wall, need to insert the spell object */
    if (tmp->other_arch && tmp->other_arch->clone.type == SPELL)
        insert_ob_in_ob(arch_to_object(tmp->other_arch), tmp);

    /*  This code causes the wall to extend some distance in
     * each direction, or until an obstruction is encountered. 
     * posblocked and negblocked help determine how far the
     * created wall can extend, it won't go extend through
     * blocked spaces.
     */
    maxrange = spell_ob->range + SP_level_range_adjust(caster, spell_ob);
    posblocked=0;
    negblocked=0;

    for(i=1; i<=maxrange; i++) {
        int dir2;
         
        dir2 = (dir<4)?(dir+2):dir-2;
         
        x = tmp->x+i*freearr_x[dir2]; 
        y = tmp->y+i*freearr_y[dir2];
        m = tmp->map;

        if(!(get_map_flags(m, &m, x, y, &x, &y) & (P_OUT_OF_MAP|P_IS_ALIVE)) &&
          ((spell_ob->move_block & GET_MAP_MOVE_BLOCK(m, x, y)) != spell_ob->move_block) &&
          !posblocked) {
            tmp2 = get_object();
            copy_object(tmp,tmp2);
            tmp2->x = x;
            tmp2->y = y;
            insert_ob_in_map(tmp2,m,op,0);
            /* If this is a spellcasting wall, need to insert the spell object */
            if (tmp2->other_arch && tmp2->other_arch->clone.type == SPELL)
                insert_ob_in_ob(arch_to_object(tmp2->other_arch), tmp2);

        } else posblocked=1;

        x = tmp->x-i*freearr_x[dir2];
        y = tmp->y-i*freearr_y[dir2];
        m = tmp->map;

        if(!(get_map_flags(m, &m, x, y, &x, &y) & (P_OUT_OF_MAP|P_IS_ALIVE)) &&
          ((spell_ob->move_block & GET_MAP_MOVE_BLOCK(m, x, y)) != spell_ob->move_block) &&
          !negblocked) {
            tmp2 = get_object();
            copy_object(tmp,tmp2);
            tmp2->x = x;
            tmp2->y = y;
            insert_ob_in_map(tmp2,m,op,0);
            if (tmp2->other_arch && tmp2->other_arch->clone.type == SPELL)
                insert_ob_in_ob(arch_to_object(tmp2->other_arch), tmp2);
        } else negblocked=1;
    }

    if(QUERY_FLAG(tmp, FLAG_BLOCKSVIEW))
        update_all_los(op->map, op->x, op->y);

    return 1;
}

int dimension_door(object *op,object *caster, object *spob, int dir) {
    uint32 dist, maxdist;
    int  mflags;
    mapstruct *m;
    sint16  sx, sy;

    if(op->type!=PLAYER)
        return 0;

    if(!dir) {
        new_draw_info(NDI_UNIQUE, 0,op,"In what direction?");
        return 0;
    }

    /* Given the new outdoor maps, can't let players dimension door for
     * ever, so put limits in.
     */
    maxdist = spob->range + 
        SP_level_range_adjust(caster, spob);

    if(op->contr->count) {
        if (op->contr->count > maxdist) {
            new_draw_info(NDI_UNIQUE, 0, op, "You can't dimension door that far!");
            return 0;
        }

        for(dist=0;dist<op->contr->count; dist++) {
            mflags = get_map_flags(op->map, &m, 
                op->x+freearr_x[dir]*(dist+1), op->y+freearr_y[dir]*(dist+1),
                &sx, &sy);

            if (mflags & (P_NO_MAGIC | P_OUT_OF_MAP)) break;

            if ((mflags & P_BLOCKSVIEW) && 
              OB_TYPE_MOVE_BLOCK(op, GET_MAP_MOVE_BLOCK(m, sx, sy))) break;
        }

        if(dist<op->contr->count) {
            new_draw_info(NDI_UNIQUE, 0,op,"Something blocks the magic of the spell.\n");
            op->contr->count=0;
            return 0;
        }
        op->contr->count=0;

        /* Remove code that puts player on random space on maps.  IMO,
         * a lot of maps probably have areas the player should not get to,
         * but may not be marked as NO_MAGIC (as they may be bounded
         * by such squares).  Also, there are probably treasure rooms and
         * lots of other maps that protect areas with no magic, but the
         * areas themselves don't contain no magic spaces.
         */
        /* This call here is really just to normalize the coordinates */
        mflags = get_map_flags(op->map, &m,op->x+freearr_x[dir]*dist, op->y+freearr_y[dir]*dist,
            &sx, &sy);
        if (mflags&P_IS_ALIVE || OB_TYPE_MOVE_BLOCK(op, GET_MAP_MOVE_BLOCK(m, sx, sy))) {
                new_draw_info(NDI_UNIQUE, 0,op,"You cast your spell, but nothing happens.\n");
                return 1; /* Maybe the penalty should be more severe... */
        }
    } else { 
        /* Player didn't specify a distance, so lets see how far
         * we can move the player.  Don't know why this stopped on
         * spaces that blocked the players view.
         */

        for(dist=0; dist < maxdist; dist++) {
            mflags = get_map_flags(op->map, &m, 
                op->x+freearr_x[dir] * (dist+1), 
                op->y+freearr_y[dir] * (dist+1),
                &sx, &sy);

            if (mflags & (P_NO_MAGIC | P_OUT_OF_MAP)) break;

            if ((mflags & P_BLOCKSVIEW) && 
              OB_TYPE_MOVE_BLOCK(op, GET_MAP_MOVE_BLOCK(m, sx, sy))) break;

        }

        /* If the destination is blocked, keep backing up until we
         * find a place for the player.
         */
        for(;dist>0; dist--) {
            if (get_map_flags(op->map, &m,op->x+freearr_x[dir]*dist, op->y+freearr_y[dir]*dist,
                          &sx, &sy) & (P_OUT_OF_MAP|P_IS_ALIVE)) continue;


            if (!OB_TYPE_MOVE_BLOCK(op, GET_MAP_MOVE_BLOCK(m, sx, sy))) break;

        }
        if(!dist) {
            new_draw_info(NDI_UNIQUE, 0,op,"Your spell failed!\n");
            return 0;
        }
    }

    /* Actually move the player now */
    remove_ob(op);
    op->x+=freearr_x[dir]*dist;
    op->y+=freearr_y[dir]*dist;
    if ((op = insert_ob_in_map(op,op->map,op,0)) == NULL)
        return 1;

    op->speed_left= -FABS(op->speed)*5; /* Freeze them for a short while */
    return 1;
}


/* cast_heal: Heals something.
 * op is the caster.
 * dir is the direction he is casting it in.
 * spell is the spell object.
 */
int cast_heal(object *op,object *caster, object *spell, int dir) {
    object *tmp;
    archetype *at;
    object *poison;
    int heal = 0, success = 0;

    tmp = find_target_for_friendly_spell(op,dir);

    if (tmp==NULL) return 0;

    /* Figure out how many hp this spell might cure.
     * could be zero if this spell heals effects, not damage.
     */
    heal = spell->stats.dam;
    if (spell->stats.hp)
        heal += random_roll(spell->stats.hp, 6, op, PREFER_HIGH) +
            spell->stats.hp;

    if (heal) {
        if (tmp->stats.hp >= tmp->stats.maxhp) {
            new_draw_info(NDI_UNIQUE, 0,tmp, "You are already fully healed.");
        }
        else {
            /* See how many points we actually heal.  Instead of messages
             * based on type of spell, we instead do messages based
             * on amount of damage healed.
             */
            if (heal > (tmp->stats.maxhp - tmp->stats.hp))
                heal = tmp->stats.maxhp - tmp->stats.hp;
            tmp->stats.hp += heal;

            if (tmp->stats.hp >= tmp->stats.maxhp) {
                new_draw_info(NDI_UNIQUE, 0,tmp, "You feel just fine!");
            } else if (heal > 50) {
                new_draw_info(NDI_UNIQUE, 0,tmp, "Your wounds close!");
            } else if (heal > 25) {
                new_draw_info(NDI_UNIQUE, 0,tmp, "Your wounds mostly close.");
            } else if (heal > 10) {
                new_draw_info(NDI_UNIQUE, 0,tmp, "Your wounds start to fade.");
            } else {
                new_draw_info(NDI_UNIQUE, 0,tmp, "Your wounds start to close.");
            }
            success=1;
        }
    }
    if (spell->attacktype & AT_DISEASE)
         if (cure_disease (tmp, op))
           success = 1;

    if (spell->attacktype & AT_POISON) {
        at = find_archetype("poisoning");
        poison=present_arch_in_ob(at,tmp);
        if (poison) {
            success = 1;
            new_draw_info(NDI_UNIQUE, 0,tmp, "Your body feels cleansed");
            poison->stats.food = 1;
        }
    }
    if (spell->attacktype & AT_CONFUSION) {
        poison=present_in_ob_by_name(FORCE,"confusion", tmp);
        if (poison) {
            success = 1;
            new_draw_info(NDI_UNIQUE, 0,tmp, "Your mind feels clearer");
            poison->duration = 1;
        }
    }
    if (spell->attacktype & AT_BLIND) {
        at=find_archetype("blindness");
        poison=present_arch_in_ob(at,tmp);
        if (poison) {
            success = 1;
            new_draw_info(NDI_UNIQUE, 0,tmp,"Your vision begins to return.");
            poison->stats.food = 1;
        }
    }
    if (spell->last_sp && tmp->stats.sp < tmp->stats.maxsp) {
        tmp->stats.sp += spell->last_sp;
        if (tmp->stats.sp > tmp->stats.maxsp) tmp->stats.sp = tmp->stats.maxsp;
        success = 1;
        new_draw_info(NDI_UNIQUE, 0,tmp,"Magical energy surges through your body!");
    }
    if (spell->last_grace && tmp->stats.grace < tmp->stats.maxgrace) {
        tmp->stats.grace += spell->last_grace;
        if (tmp->stats.grace > tmp->stats.maxgrace) tmp->stats.grace = tmp->stats.maxgrace;
        success = 1;
        new_draw_info(NDI_UNIQUE, 0,tmp,"You feel redeemed with your god!");
    }
    if (spell->stats.food && tmp->stats.food < 999) {
        tmp->stats.food += spell->stats.food;
        if (tmp->stats.food > 999) tmp->stats.food=999;
        success = 1;
        /* We could do something a bit better like the messages for healing above */
        new_draw_info(NDI_UNIQUE, 0,tmp,"You feel your belly fill with food");
    }
    return success;
}


/* This is used for the spells that gain stats.  There are no spells
 * right now that icnrease wis/int/pow on a temp basis, so no
 * good comments for those.
 */
static const char* const no_gain_msgs[NUM_STATS] = {
"You grow no stronger.",
"You grow no more agile.",
"You don't feel any healthier.",
"no wis",
"You are no easier to look at.",
"no int",
"no pow"
};

int cast_change_ability(object *op,object *caster,object *spell_ob, int dir, int silent) {
    object *tmp, *tmp2=NULL;
    object *force=NULL;
    int i;
  
    /* if dir = 99 op defaults to tmp, eat_special_food() requires this. */
    if(dir!=0) {
        tmp=find_target_for_friendly_spell(op,dir);
    } else {
        tmp = op;
    }

    if(tmp==NULL) return 0;
  
    /* If we've already got a force of this type, don't add a new one. */
    for(tmp2=tmp->inv; tmp2!=NULL; tmp2=tmp2->below) {
        if (tmp2->type==FORCE && tmp2->subtype == FORCE_CHANGE_ABILITY)  {
            if (tmp2->name == spell_ob->name) {
                force=tmp2;    /* the old effect will be "refreshed" */
                break;
            }
            else if (spell_ob->race && spell_ob->race == tmp2->name) {
            if ( !silent )
                        new_draw_info_format(NDI_UNIQUE, 0, op,
                            "You can not cast %s while %s is in effect",
                            spell_ob->name, tmp2->name_pl);
                    return 0;
            }
        }
    }
    if(force==NULL) {
        force=get_archetype(FORCE_NAME);
        force->subtype = FORCE_CHANGE_ABILITY;
        free_string(force->name);
        if (spell_ob->race) 
            force->name = add_refcount(spell_ob->race);
        else
            force->name = add_refcount(spell_ob->name);
        free_string(force->name_pl);
        force->name_pl = add_refcount(spell_ob->name);
        new_draw_info(NDI_UNIQUE, 0, op, "You create an aura of magical force.");

    } else {
        int duration;

        duration = spell_ob->duration + SP_level_duration_adjust(caster, spell_ob) * 50;
        if (duration > force->duration) {
            force->duration = duration;
            new_draw_info(NDI_UNIQUE, 0, op, "You recast the spell while in effect.");
        } else {
            new_draw_info(NDI_UNIQUE, 0, op, "Recasting the spell had no effect.");
        }
        return 1;
    }
    force->duration = spell_ob->duration + SP_level_duration_adjust(caster, spell_ob) * 50;
    force->speed = 1.0;
    force->speed_left = -1.0;
    SET_FLAG(force, FLAG_APPLIED);

    /* Now start processing the effects.  First, protections */
    for (i=0; i < NROFATTACKS; i++) {
        if (spell_ob->resist[i]) {
            force->resist[i] = spell_ob->resist[i] + SP_level_dam_adjust(caster, spell_ob);
            if (force->resist[i] > 100) force->resist[i] = 100;
        }
    }
    if (spell_ob->stats.hp) 
        force->stats.hp = spell_ob->stats.hp + SP_level_dam_adjust(caster,spell_ob);

    if (tmp->type == PLAYER) {
        /* Stat adjustment spells */
        for (i=0; i < NUM_STATS; i++) {
            sint8 stat = get_attr_value(&spell_ob->stats, i), k, sm;
            if (stat) {
                sm=0;
                for (k=0; k<stat; k++)
                    sm += rndm(1, 3);

                if ((get_attr_value(&tmp->stats, i) + sm) > (15 + 5 * stat)) {
                    sm = (15 + 5 * stat) - get_attr_value(&tmp->stats, i);
                    if (sm<0) sm = 0;
                }
                set_attr_value(&force->stats, i, sm);
                if (!sm)
                    new_draw_info(NDI_UNIQUE, 0,op,no_gain_msgs[i]);
            }
        }
    }

    force->move_type = spell_ob->move_type;

    if (QUERY_FLAG(spell_ob, FLAG_SEE_IN_DARK))
        SET_FLAG(force, FLAG_SEE_IN_DARK);

    if (QUERY_FLAG(spell_ob, FLAG_XRAYS))
        SET_FLAG(force, FLAG_XRAYS);

    /* Haste/bonus speed */
    if (spell_ob->stats.exp) {
        if (op->speed > 0.5f) force->stats.exp = (sint64) ((float) spell_ob->stats.exp / (op->speed + 0.5f));
        else
            force->stats.exp = spell_ob->stats.exp;
    }

    force->stats.wc = spell_ob->stats.wc;
    force->stats.ac = spell_ob->stats.ac;
    force->attacktype = spell_ob->attacktype;

    insert_ob_in_ob(force,tmp);
    change_abil(tmp,force);     /* Mostly to display any messages */
    fix_player(tmp);
    return 1;
}

/* This used to be part of cast_change_ability, but it really didn't make
 * a lot of sense, since most of the values it derives are from the god
 * of the caster.
 */

int cast_bless(object *op,object *caster,object *spell_ob, int dir) {
    int i;
    object *god = find_god(determine_god(op)), *tmp2, *force=NULL, *tmp;

    /* if dir = 99 op defaults to tmp, eat_special_food() requires this. */
    if(dir!=0) {
        tmp=find_target_for_friendly_spell(op,dir);
    } else {
        tmp = op;
    }

    /* If we've already got a force of this type, don't add a new one. */
    for(tmp2=tmp->inv; tmp2!=NULL; tmp2=tmp2->below) {
        if (tmp2->type==FORCE && tmp2->subtype == FORCE_CHANGE_ABILITY)  {
            if (tmp2->name == spell_ob->name) {
                force=tmp2;    /* the old effect will be "refreshed" */
                break;
            }
            else if (spell_ob->race && spell_ob->race == tmp2->name) {
                new_draw_info_format(NDI_UNIQUE, 0, op,
                    "You can not cast %s while %s is in effect",
                    spell_ob->name, tmp2->name_pl);
                return 0;
            }
        }
    }
    if(force==NULL) {
        force=get_archetype(FORCE_NAME);
        force->subtype = FORCE_CHANGE_ABILITY;
        free_string(force->name);
        if (spell_ob->race) 
            force->name = add_refcount(spell_ob->race);
        else
            force->name = add_refcount(spell_ob->name);
        free_string(force->name_pl);
        force->name_pl = add_refcount(spell_ob->name);
        new_draw_info(NDI_UNIQUE, 0, op, "You create an aura of magical force.");
    } else {
        int duration;

        duration = spell_ob->duration + SP_level_duration_adjust(caster, spell_ob) * 50;
        if (duration > force->duration) {
            force->duration = duration;
            new_draw_info(NDI_UNIQUE, 0, op, "You recast the spell while in effect.");
        } else {
            new_draw_info(NDI_UNIQUE, 0, op, "Recasting the spell had no effect.");
        }
        return 0;
    }
    force->duration = spell_ob->duration + SP_level_duration_adjust(caster, spell_ob) * 50;
    force->speed = 1.0;
    force->speed_left = -1.0;
    SET_FLAG(force, FLAG_APPLIED);

    if(!god) {
        new_draw_info(NDI_UNIQUE, 0,op,"Your blessing seems empty.");
    } else {
        /* Only give out good benefits, and put a max on it */
        for (i=0; i<NROFATTACKS; i++) {
            if (god->resist[i]>0) {
                force->resist[i] = MIN(god->resist[i], spell_ob->resist[ATNR_GODPOWER]);
            }
        }
        force->path_attuned|=god->path_attuned;
        if (spell_ob->attacktype) {
            force->attacktype|=god->attacktype | AT_PHYSICAL;
            if(god->slaying) force->slaying = add_string(god->slaying);
        }
        if (tmp != op) {
                new_draw_info_format(NDI_UNIQUE, 0, op, "You bless %s.", tmp->name);
                new_draw_info_format(NDI_UNIQUE, 0, tmp, "%s blessed you.", op->name);
        } else {
            new_draw_info_format(NDI_UNIQUE, 0,tmp,
                     "You are blessed by %s!",god->name);
        }

    }
    force->stats.wc = spell_ob->stats.wc;
    force->stats.ac = spell_ob->stats.ac;

    change_abil(tmp,force);     /* Mostly to display any messages */
    insert_ob_in_ob(force,tmp);
    fix_player(tmp);
    return 1;
}


/* Alchemy code by Mark Wedel
 *
 * This code adds a new spell, called alchemy.  Alchemy will turn
 * objects to gold nuggets, the value of the gold nuggets being
 * about 90% of that of the item itself.  It uses the value of the
 * object before charisma adjustments, because the nuggets themselves
 * will be will be adjusted by charisma when sold.
 *
 * Large nuggets are worth 25 gp each (base).  You will always get
 * the maximum number of large nuggets you could get.
 * Small nuggets are worth 1 gp each (base).  You will get from 0
 * to the max amount of small nuggets as you could get.
 *
 * For example, if an item is worth 110 gold, you will get
 * 4 large nuggets, and from 0-10 small nuggets.
 *
 * There is also a chance (1:30) that you will get nothing at all
 * for the object.  There is also a maximum weight that will be
 * alchemied.
 */
 
/* I didn't feel like passing these as arguements to the
 * two functions that need them.  Real values are put in them
 * when the spell is cast, and these are freed when the spell
 * is finished.
 */
static object *small, *large;

static void alchemy_object(object *obj, int *small_nuggets,
         int *large_nuggets, int *weight)
{
    uint64 value=query_cost(obj, NULL, F_TRUE);

    /* Give third price when we alchemy money (This should hopefully
     * make it so that it isn't worth it to alchemy money, sell
     * the nuggets, alchemy the gold from that, etc.
     * Otherwise, give 9 silver on the gold for other objects,
     * so that it would still be more affordable to haul
     * the stuff back to town.
     */

    if (QUERY_FLAG(obj, FLAG_UNPAID))
        value=0;
    else if (obj->type==MONEY || obj->type==GEM)
        value /=3;
    else
        value = (value*9)/10;

    value /= 4; // fix by GHJ, don't understand, pcg

    if ((obj->value>0) && rndm(0, 29)) {
        int count;

        count = value / large->value;
        *large_nuggets += count;
        value -= (uint64)count * (uint64)large->value;
        count = value / small->value;
        *small_nuggets += count;
    }

    /* Turn 25 small nuggets into 1 large nugget.  If the value
     * of large nuggets is not evenly divisable by the small nugget
     * value, take off an extra small_nugget (Assuming small_nuggets!=0)
     */
    if (*small_nuggets * small->value >= large->value) {
        (*large_nuggets)++;
        *small_nuggets -= large->value / small->value;
        if (*small_nuggets && large->value % small->value)
                (*small_nuggets)--;
    }
    weight += obj->weight;
    remove_ob(obj);
    free_object(obj);
}

static void update_map(object *op, mapstruct *m, int small_nuggets, int large_nuggets,
        int x, int y)
{
    object *tmp;
    int flag=0;

    /* Put any nuggets below the player, but we can only pass this
     * flag if we are on the same space as the player 
     */
    if (x == op->x && y == op->y && op->map == m) flag = INS_BELOW_ORIGINATOR;

    if (small_nuggets) {
        tmp = get_object();
        copy_object(small, tmp);
        tmp-> nrof = small_nuggets;
        tmp->x = x;
        tmp->y = y;
        insert_ob_in_map(tmp, m, op, flag);
    }
    if (large_nuggets) {
        tmp = get_object();
        copy_object(large, tmp);
        tmp-> nrof = large_nuggets;
        tmp->x = x;
        tmp->y = y;
        insert_ob_in_map(tmp, m, op, flag);
    }
}

int alchemy(object *op, object *caster, object *spell_ob)
{
    int x,y,weight=0,weight_max,large_nuggets,small_nuggets, mflags;
    sint16 nx, ny;
    object *next,*tmp;
    mapstruct *mp;

    if(op->type!=PLAYER)
        return 0;

    /* Put a maximum weight of items that can be alchemied.  Limits the power
     * some, and also prevents people from alcheming every table/chair/clock
     * in sight
     */
    weight_max = spell_ob->duration + +SP_level_duration_adjust(caster,spell_ob);
    weight_max *= 1000;
    small=get_archetype("smallnugget"),
    large=get_archetype("largenugget");

    for(y= op->y-1;y<=op->y+1;y++) {
        for(x= op->x-1;x<=op->x+1;x++) {
            nx = x;
            ny = y;

            mp = op->map;

            mflags = get_map_flags(mp, &mp, nx, ny, &nx, &ny);

            if(mflags & (P_OUT_OF_MAP | P_NO_MAGIC))
                continue;

            /* Treat alchemy a little differently - most spell effects
             * use fly as the movement type - for alchemy, consider it
             * ground level effect.
             */
            if (GET_MAP_MOVE_BLOCK(mp, nx, ny) & MOVE_WALK)
                continue;

            small_nuggets=0;
            large_nuggets=0;

            for(tmp=get_map_ob(mp,nx,ny);tmp!=NULL;tmp=next) {
                next=tmp->above;
                if (tmp->weight>0 && !QUERY_FLAG(tmp, FLAG_NO_PICK) &&
                    !QUERY_FLAG(tmp, FLAG_ALIVE) &&
                    !QUERY_FLAG(tmp, FLAG_IS_CAULDRON)) {

                    if (tmp->inv) {
                        object *next1, *tmp1;
                        for (tmp1 = tmp->inv; tmp1!=NULL; tmp1=next1) {
                            next1 = tmp1->below;
                            if (tmp1->weight>0 && !QUERY_FLAG(tmp1, FLAG_NO_PICK) &&
                                !QUERY_FLAG(tmp1, FLAG_ALIVE) &&
                                !QUERY_FLAG(tmp1, FLAG_IS_CAULDRON))
                                alchemy_object(tmp1, &small_nuggets, &large_nuggets,
                                           &weight);
                        }
                    }
                    alchemy_object(tmp, &small_nuggets, &large_nuggets, &weight);
            
                    if (weight>weight_max) {
                        update_map(op, mp, small_nuggets, large_nuggets, nx, ny);
                        free_object(large);
                        free_object(small);
                        return 1;
                    }
                } /* is alchemable object */
            } /* process all objects on this space */

            /* Insert all the nuggets at one time.  This probably saves time, but
             * it also prevents us from alcheming nuggets that were just created
             * with this spell.
             */
            update_map(op, mp, small_nuggets, large_nuggets, nx, ny);
        }
    }
    free_object(large);
    free_object(small);
    /* reset this so that if player standing on a big pile of stuff,
     * it is redrawn properly.
     */
    op->contr->socket.look_position = 0;
    return 1;
}


/* This function removes the cursed/damned status on equipped
 * items.
 */
int remove_curse(object *op, object *caster, object *spell) {
    object *tmp;
    int success = 0, was_one = 0;

    for (tmp = op->inv; tmp; tmp = tmp->below)
        if (QUERY_FLAG(tmp, FLAG_APPLIED) &&
           ((QUERY_FLAG(tmp, FLAG_CURSED) && QUERY_FLAG(spell, FLAG_CURSED)) ||
            (QUERY_FLAG(tmp, FLAG_DAMNED) && QUERY_FLAG(spell, FLAG_DAMNED)))) {

            was_one++;
            if (tmp->level <= caster_level(caster, spell)) {
                success++;
                if (QUERY_FLAG(spell, FLAG_DAMNED))
                    CLEAR_FLAG(tmp, FLAG_DAMNED);

                CLEAR_FLAG(tmp, FLAG_CURSED);
                CLEAR_FLAG(tmp, FLAG_KNOWN_CURSED);
                tmp->value = 0; /* Still can't sell it */
                if (op->type == PLAYER)
                    esrv_send_item(op, tmp);
            }
        }

    if (op->type==PLAYER) {
        if (success) {
            new_draw_info(NDI_UNIQUE, 0,op, "You feel like some of your items are looser now.");
        } else {
            if (was_one)
                new_draw_info(NDI_UNIQUE, 0,op, "You failed to remove the curse.");
            else 
                new_draw_info(NDI_UNIQUE, 0,op, "You are not using any cursed items.");
        }
    }
    return success;
}

/* Identifies objects in the players inventory/on the ground */

int cast_identify(object *op, object *caster, object *spell) {
    object *tmp;
    int success = 0, num_ident;

    num_ident = spell->stats.dam + SP_level_dam_adjust(caster, spell);

    if (num_ident < 1) num_ident=1;


    for (tmp = op->inv; tmp ; tmp = tmp->below) {
        if (!QUERY_FLAG(tmp, FLAG_IDENTIFIED) && !tmp->invisible &&  need_identify(tmp)) {
            identify(tmp);
            if (op->type==PLAYER) {
                new_draw_info_format(NDI_UNIQUE, 0, op,
                     "You have %s.", long_desc(tmp, op));
                if (tmp->msg) {
                    new_draw_info(NDI_UNIQUE, 0,op, "The item has a story:");
                    new_draw_info(NDI_UNIQUE, 0,op, tmp->msg);
                }
            }
            num_ident--;
            success=1;
            if (!num_ident) break;
        }
    }
    /* If all the power of the spell has been used up, don't go and identify
     * stuff on the floor.  Only identify stuff on the floor if the spell
     * was not fully used.
     */
    if (num_ident) {
        for(tmp = get_map_ob(op->map,op->x,op->y);tmp!=NULL;tmp=tmp->above)
        if (!QUERY_FLAG(tmp, FLAG_IDENTIFIED) && !tmp->invisible &&
            need_identify(tmp)) {

            identify(tmp);
            if (op->type==PLAYER) {
                new_draw_info_format(NDI_UNIQUE, 0,op,
                     "On the ground is %s.", long_desc(tmp, op));
                if (tmp->msg) {
                    new_draw_info(NDI_UNIQUE, 0,op, "The item has a story:");
                    new_draw_info(NDI_UNIQUE, 0,op, tmp->msg);
                }
                esrv_send_item(op, tmp);
            }
            num_ident--;
            success=1;
            if (!num_ident) break;
        }
    }
    if (!success)
        new_draw_info(NDI_UNIQUE, 0,op, "You can't reach anything unidentified.");
    else {
        spell_effect(spell, op->x, op->y, op->map, op);
    }
    return success;
}


int cast_detection(object *op, object *caster, object *spell, object *skill) {
    object *tmp, *last, *god, *detect;
    int done_one, range, mflags, floor, level;
    sint16 x, y, nx, ny;
    mapstruct   *m;

    /* We precompute some values here so that we don't have to keep
     * doing it over and over again.
     */
    god=find_god(determine_god(op));
    level=caster_level(caster, spell);
    range = spell->range + SP_level_range_adjust(caster, spell);

    if (!skill) skill=caster;

    for (x = op->x - range; x <= op->x + range; x++)
        for (y = op->y - range; y <= op->y + range; y++) {

            m = op->map;
            mflags = get_map_flags(m, &m, x, y, &nx, &ny);
            if (mflags & P_OUT_OF_MAP) continue;

            /* For most of the detections, we only detect objects above the
             * floor.  But this is not true for show invisible.
             * Basically, we just go and find the top object and work
             * down - that is easier than working up.
             */

            for (last=NULL, tmp=get_map_ob(m, nx, ny); tmp; tmp=tmp->above) last=tmp;
            /* Shouldn't happen, but if there are no objects on a space, this
             * would happen.
             */
            if (!last) continue;

            done_one=0;
            floor=0;
            detect = NULL;
            for (tmp=last; tmp; tmp=tmp->below) {

                /* show invisible */
                if (QUERY_FLAG(spell, FLAG_MAKE_INVIS) &&
                    /* Might there be other objects that we can make visibile? */
                    (tmp->invisible && (QUERY_FLAG(tmp, FLAG_MONSTER) || 
                    (tmp->type==PLAYER && !QUERY_FLAG(tmp, FLAG_WIZ)) ||
                     tmp->type==CF_HANDLE || 
                     tmp->type==TRAPDOOR || tmp->type==EXIT || tmp->type==HOLE ||
                     tmp->type==BUTTON || tmp->type==TELEPORTER ||
                     tmp->type==GATE || tmp->type==LOCKED_DOOR ||
                     tmp->type==WEAPON || tmp->type==ALTAR || tmp->type==SIGN ||
                     tmp->type==TRIGGER_PEDESTAL || tmp->type==SPECIAL_KEY ||
                     tmp->type==TREASURE || tmp->type==BOOK ||
                     tmp->type==HOLY_ALTAR))) {
                        if(random_roll(0, skill->level-1, op, PREFER_HIGH) > level/4) {
                            tmp->invisible=0;
                            done_one = 1;
                        }
                }
                if (QUERY_FLAG(tmp, FLAG_IS_FLOOR)) floor=1;

                /* All detections below this point don't descend beneath the floor,
                 * so just continue on.  We could be clever and look at the type of
                 * detection to completely break out if we don't care about objects beneath
                 * the floor, but once we get to the floor, not likely a very big issue anyways.
                 */
                if (floor) continue;

                /* I had thought about making detect magic and detect curse
                 * show the flash the magic item like it does for detect monster.
                 * however, if the object is within sight, this would then make it
                 * difficult to see what object is magical/cursed, so the
                 * effect wouldn't be as apparant.
                 */

                /* detect magic */
                if (QUERY_FLAG(spell, FLAG_KNOWN_MAGICAL) && 
                    !QUERY_FLAG(tmp,FLAG_KNOWN_MAGICAL) && 
                    !QUERY_FLAG(tmp, FLAG_IDENTIFIED) &&
                    is_magical(tmp)) {
                        SET_FLAG(tmp,FLAG_KNOWN_MAGICAL);
                        /* make runes more visibile */
                        if(tmp->type==RUNE && tmp->attacktype&AT_MAGIC)
                            tmp->stats.Cha/=4;
                        done_one = 1;
                }
                /* detect monster */
                if (QUERY_FLAG(spell, FLAG_MONSTER) &&
                    (QUERY_FLAG(tmp, FLAG_MONSTER) || tmp->type==PLAYER)) {
                        done_one = 2;
                        if (!detect) detect=tmp;
                }
                /* Basically, if race is set in the spell, then the creatures race must
                 * match that.  if the spell race is set to GOD, then the gods opposing
                 * race must match.
                 */
                if (spell->race && QUERY_FLAG(tmp,FLAG_MONSTER) && tmp->race &&
                    ((!strcmp(spell->race, "GOD") && god && god->slaying && strstr(god->slaying,tmp->race)) ||
                     (strstr(spell->race, tmp->race)))) {
                        done_one = 2;
                        if (!detect) detect=tmp;
                }
                if (QUERY_FLAG(spell, FLAG_KNOWN_CURSED) && !QUERY_FLAG(tmp, FLAG_KNOWN_CURSED) &&
                        (QUERY_FLAG(tmp, FLAG_CURSED) || QUERY_FLAG(tmp, FLAG_DAMNED))) {
                        SET_FLAG(tmp, FLAG_KNOWN_CURSED);
                        done_one = 1;
                }
            } /* for stack of objects on this space */

            /* Code here puts an effect of the spell on the space, so you can see
             * where the magic is.
             */
            if (done_one) {
                object *detect_ob = arch_to_object(spell->other_arch);
                detect_ob->x = nx;
                detect_ob->y = ny;
                /* if this is set, we want to copy the face */
                if (done_one == 2 && detect) {
                    detect_ob->face = detect->face;
                    detect_ob->animation_id = detect->animation_id;
                    detect_ob->anim_speed = detect->anim_speed;
                    detect_ob->last_anim=0;
                    /* by default, the detect_ob is already animated */
                    if (!QUERY_FLAG(detect, FLAG_ANIMATE)) CLEAR_FLAG(detect_ob, FLAG_ANIMATE);
                }
                insert_ob_in_map(detect_ob, m, op,0);
            }
        } /* for processing the surrounding spaces */


    /* Now process objects in the players inventory if detect curse or magic */
    if (QUERY_FLAG(spell, FLAG_KNOWN_CURSED) || QUERY_FLAG(spell, FLAG_KNOWN_MAGICAL)) {
        done_one = 0;
        for (tmp = op->inv; tmp; tmp = tmp->below) {
            if (!tmp->invisible && !QUERY_FLAG(tmp, FLAG_IDENTIFIED)) {
                if (QUERY_FLAG(spell, FLAG_KNOWN_MAGICAL) && 
                    is_magical(tmp) && !QUERY_FLAG(tmp,FLAG_KNOWN_MAGICAL)) {
                        SET_FLAG(tmp,FLAG_KNOWN_MAGICAL);
                        if (op->type==PLAYER)
                            esrv_send_item (op, tmp);
                }
                if (QUERY_FLAG(spell, FLAG_KNOWN_CURSED) && !QUERY_FLAG(tmp, FLAG_KNOWN_CURSED) &&
                    (QUERY_FLAG(tmp, FLAG_CURSED) || QUERY_FLAG(tmp, FLAG_DAMNED))) {
                        SET_FLAG(tmp, FLAG_KNOWN_CURSED);
                        if (op->type==PLAYER)
                            esrv_send_item (op, tmp);
                }
            } /* if item is not identified */
        } /* for the players inventory */
    } /* if detect magic/curse and object is a player */
    return 1;
}


/**
 * Checks if victim has overcharged mana. caster_level is the caster's (skill)
 * level whos spell did cause the overcharge.
 */
static void charge_mana_effect(object *victim, int caster_level)
{

    /* Prevent explosions for objects without mana. Without this check, doors
     * will explode, too.
     */
    if (victim->stats.maxsp <= 0)
        return;

    new_draw_info(NDI_UNIQUE, 0, victim, "You feel energy course through you.");

    if (victim->stats.sp >= victim->stats.maxsp*2) {
        object *tmp;

        new_draw_info(NDI_UNIQUE, 0, victim, "Your head explodes!");

        /* Explodes a fireball centered at player */
        tmp = get_archetype(EXPLODING_FIREBALL);
        tmp->dam_modifier = random_roll(1, caster_level, victim, PREFER_LOW)/5+1;
        tmp->stats.maxhp = random_roll(1, caster_level, victim, PREFER_LOW)/10+2;
        tmp->x = victim->x;
        tmp->y = victim->y;
        insert_ob_in_map(tmp, victim->map, NULL, 0);
        victim->stats.sp = 2*victim->stats.maxsp;
    }
    else if (victim->stats.sp >= victim->stats.maxsp*1.88) {
        new_draw_info(NDI_UNIQUE, NDI_ORANGE, victim, "You feel like your head is going to explode.");
    }
    else if (victim->stats.sp >= victim->stats.maxsp*1.66) {
        new_draw_info(NDI_UNIQUE, 0, victim, "You get a splitting headache!");
    }
    else if (victim->stats.sp >= victim->stats.maxsp*1.5) {
        new_draw_info(NDI_UNIQUE, 0, victim, "Chaos fills your world.");
        confuse_player(victim, victim, 99);
    }
    else if (victim->stats.sp >= victim->stats.maxsp*1.25) {
        new_draw_info(NDI_UNIQUE, 0, victim, "You start hearing voices.");
    }
}

/* cast_transfer
 * This spell transfers sp from the player to another person.
 * We let the target go above their normal maximum SP.
 */

int cast_transfer(object *op,object *caster, object *spell, int dir) {
    object *plyr=NULL;
    sint16 x, y;
    mapstruct *m;
    int mflags;

    m = op->map;
    x =  op->x+freearr_x[dir];
    y = op->y+freearr_y[dir];

    mflags = get_map_flags(m, &m, x, y, &x, &y);

    if (!(mflags & P_OUT_OF_MAP) && mflags & P_IS_ALIVE) {
        for(plyr=get_map_ob(m, x, y); plyr!=NULL; plyr=plyr->above)
            if (plyr != op && QUERY_FLAG(plyr, FLAG_ALIVE))
                break;
    }


    /* If we did not find a player in the specified direction, transfer
     * to anyone on top of us. This is used for the rune of transference mostly.
     */
    if(plyr==NULL)
        for(plyr=get_map_ob(op->map,op->x,op->y); plyr!=NULL; plyr=plyr->above)
            if (plyr != op && QUERY_FLAG(plyr, FLAG_ALIVE))
                break;

    if (!plyr) {
        new_draw_info(NDI_BLACK, 0, op, "There is no one there.");
        return 0;
    }
    /* give sp */
    if(spell->stats.dam > 0) {
        plyr->stats.sp += spell->stats.dam + SP_level_dam_adjust(caster, spell);
        charge_mana_effect(plyr, caster_level(caster, spell));
        return 1;
    }
    /* suck sp away.  Can't suck sp from yourself */
    else if (op != plyr) {
        /* old dragin magic used floats.  easier to just use ints and divide by 100 */

        int rate = -spell->stats.dam + SP_level_dam_adjust(caster, spell), sucked;

        if (rate > 95) rate=95;

        sucked = (plyr->stats.sp * rate) / 100;
        plyr->stats.sp -= sucked;
        if (QUERY_FLAG(op, FLAG_ALIVE)) {
            /* Player doesn't get full credit */
            sucked = (sucked * rate) / 100;
            op->stats.sp += sucked;
            if (sucked > 0) {
                charge_mana_effect(op, caster_level(caster, spell));
            }
        }
        return 1;
    }
    return 0;
}


/* counterspell:  nullifies spell effects.
 * op is the counterspell object, dir is the direction
 * it was cast in.
 * Basically, if the object has a magic attacktype,
 * this may nullify it.
 */
void counterspell(object *op,int dir)
{
    object *tmp, *head, *next;
    int mflags;
    mapstruct *m;
    sint16  sx,sy;

    sx = op->x + freearr_x[dir];
    sy = op->y + freearr_y[dir];
    m = op->map;
    mflags = get_map_flags(m, &m, sx, sy, &sx, &sy);
    if (mflags & P_OUT_OF_MAP) return;
    
    for(tmp=get_map_ob(m,sx,sy); tmp!=NULL; tmp=next) {
        next = tmp->above;

        /* Need to look at the head object - otherwise, if tmp
         * points to a monster, we don't have all the necessary
         * info for it.
         */
        if (tmp->head) head = tmp->head;
        else head = tmp;

       /* don't attack our own spells */
       if(tmp->owner && tmp->owner == op->owner) continue;

        /* Basically, if the object is magical and not counterspell, 
         * we will more or less remove the object.  Don't counterspell
         * monsters either. 
         */

        if (head->attacktype & AT_MAGIC &&
           !(head->attacktype & AT_COUNTERSPELL) && 
           !QUERY_FLAG(head,FLAG_MONSTER) && 
           (op->level > head->level)) {
                remove_ob(head);
                free_object(head);
        } else switch(head->type) {
            case SPELL_EFFECT: 
                if(op->level > head->level) {
                    remove_ob(head);
                    free_object(head);
                }
                break;

            /* I really don't get this rune code that much - that
             * random chance seems really low.
             */
            case RUNE:
                if(rndm(0, 149) == 0) {
                    head->stats.hp--;  /* weaken the rune */
                    if(!head->stats.hp) {
                        remove_ob(head);
                        free_object(head);
                    }
                }
                break;
        }
    }
}


/* cast_consecrate() - a spell to make an altar your god's */
int cast_consecrate(object *op, object *caster, object *spell) {
    char buf[MAX_BUF];

    object *tmp, *god=find_god(determine_god(op));

    if(!god) {
        new_draw_info(NDI_UNIQUE, 0,op,
                      "You can't consecrate anything if you don't worship a god!");
        return 0;
    }
 
    for(tmp=op->below;tmp;tmp=tmp->below) {
        if(QUERY_FLAG(tmp,FLAG_IS_FLOOR)) break;
        if(tmp->type==HOLY_ALTAR) {

            if(tmp->level > caster_level(caster, spell)) {
                new_draw_info_format(NDI_UNIQUE, 0,op,
                    "You are not powerful enough to reconsecrate the %s", tmp->name);
                return 0;
            } else {
                /* If we got here, we are consecrating an altar */
                if(tmp->name)   free_string(tmp->name);
                sprintf(buf,"Altar of %s",god->name);
                tmp->name = add_string(buf);
                tmp->level = caster_level(caster, spell);
                tmp->other_arch = god->arch;
                if(op->type==PLAYER) esrv_update_item(UPD_NAME, op, tmp);
                new_draw_info_format(NDI_UNIQUE,0, op,
                                     "You consecrated the altar to %s!",god->name);
                return 1;
            }
        }
    }
    new_draw_info(NDI_UNIQUE, 0,op,"You are not standing over an altar!");
    return 0;
}

/* animate_weapon - 
 * Generalization of staff_to_snake.  Makes a golem out of the caster's weapon.
 * The golem is based on the archetype specified, modified by the caster's level
 * and the attributes of the weapon.  The weapon is inserted in the golem's 
 * inventory so that it falls to the ground when the golem dies.
 * This code was very odd - code early on would only let players use the spell,
 * yet the code wass full of player checks.  I've presumed that the code
 * that only let players use it was correct, and removed all the other
 * player checks. MSW 2003-01-06
 */

int animate_weapon(object *op,object *caster,object *spell, int dir) {
    object *weapon, *tmp;
    char buf[MAX_BUF];
    int a, i;
    sint16 x, y;
    mapstruct *m;
    materialtype_t *mt;
 
    if(!spell->other_arch){
        new_draw_info(NDI_UNIQUE, 0,op,"Oops, program error!");
        LOG(llevError,"animate_weapon failed: spell %s missing other_arch!\n", spell->name);
        return 0;
    }
    /* exit if it's not a player using this spell. */
    if(op->type!=PLAYER) return 0;

    /* if player already has a golem, abort */
    if(op->contr->ranges[range_golem]!=NULL && op->contr->golem_count == op->contr->ranges[range_golem]->count) {
        control_golem(op->contr->ranges[range_golem],dir);
        return 0;
    }

    /* if no direction specified, pick one */
    if(!dir) 
        dir=find_free_spot(NULL,op->map,op->x,op->y,1,9);

    m = op->map;
    x = op->x+freearr_x[dir];
    y = op->y+freearr_y[dir];

    /* if there's no place to put the golem, abort */
    if((dir==-1) || (get_map_flags(m, &m, x, y, &x, &y) &  P_OUT_OF_MAP) ||
      ((spell->other_arch->clone.move_type & GET_MAP_MOVE_BLOCK(m, x, y)) == spell->other_arch->clone.move_type)) {
        new_draw_info(NDI_UNIQUE, 0,op,"There is something in the way.");
        return 0;
    }

    /* Use the weapon marked by the player. */
    weapon = find_marked_object(op);

    if (!weapon) {
        new_draw_info(NDI_BLACK, 0, op, "You must mark a weapon to use with this spell!");
        return 0;
    }
    if (spell->race && strcmp(weapon->arch->name, spell->race)) {
        new_draw_info(NDI_UNIQUE, 0,op,"The spell fails to transform your weapon.");
        return 0;
    }
    if (weapon->type != WEAPON) {
        new_draw_info(NDI_UNIQUE, 0,op,"You need to wield a weapon to animate it.");
        return 0;
    }
    if (QUERY_FLAG(weapon, FLAG_APPLIED)) {
        new_draw_info_format(NDI_BLACK, 0, op, "You need to unequip %s before using it in this spell",
                         query_name(weapon));
        return 0;
    }

    if (weapon->nrof > 1) {
        tmp = get_split_ob(weapon, 1);
        esrv_send_item(op, weapon);
        weapon = tmp;
    }

    /* create the golem object */
    tmp=arch_to_object(spell->other_arch);

    /* if animated by a player, give the player control of the golem */
    CLEAR_FLAG(tmp, FLAG_MONSTER);
    SET_FLAG(tmp, FLAG_FRIENDLY);
    tmp->stats.exp=0;
    add_friendly_object(tmp);
    tmp->type=GOLEM;
    set_owner(tmp,op);
    set_spell_skill(op, caster, spell, tmp);
    op->contr->ranges[range_golem]=tmp;
    op->contr->shoottype=range_golem;
    op->contr->golem_count = tmp->count;

    /* Give the weapon to the golem now.  A bit of a hack to check the
     * removed flag - it should only be set if get_split_object was
     * used above.
     */
    if (!QUERY_FLAG(weapon, FLAG_REMOVED))
        remove_ob (weapon);
    insert_ob_in_ob (weapon, tmp);
    esrv_send_item(op, weapon);
    /* To do everything necessary to let a golem use the weapon is a pain,
     * so instead, just set it as equipped (otherwise, we need to update
     * body_info, skills, etc)
     */            
    SET_FLAG (tmp, FLAG_USE_WEAPON);
    SET_FLAG(weapon, FLAG_APPLIED);
    fix_player(tmp);

    /* There used to be 'odd' code that basically seemed to take the absolute
     * value of the weapon->magic an use that.  IMO, that doesn't make sense -
     * if you're using a crappy weapon, it shouldn't be as good.
     */

    /* modify weapon's animated wc */
    tmp->stats.wc = tmp->stats.wc - SP_level_range_adjust(caster,spell) 
        - 5 * weapon->stats.Dex - 2 * weapon->stats.Str - weapon->magic;
    if(tmp->stats.wc<-127) tmp->stats.wc = -127;

    /* Modify hit points for weapon */
    tmp->stats.maxhp = tmp->stats.maxhp + spell->duration + 
        SP_level_duration_adjust(caster, spell) + 
        + 8 * weapon->magic + 12 * weapon->stats.Con;
    if(tmp->stats.maxhp<0) tmp->stats.maxhp=10;
    tmp->stats.hp = tmp->stats.maxhp;

    /* Modify weapon's damage */
    tmp->stats.dam = spell->stats.dam + SP_level_dam_adjust(caster, spell)
        + weapon->stats.dam
        + weapon->magic
        + 5 * weapon->stats.Str;
    if(tmp->stats.dam<0) tmp->stats.dam=127;


    /* attacktype */
    if ( ! tmp->attacktype)
        tmp->attacktype = AT_PHYSICAL;

    mt = NULL;
    if (op->materialname != NULL)
        mt = name_to_material(op->materialname);
    if (mt != NULL) {
        for (i=0; i < NROFATTACKS; i++)
            tmp->resist[i] = 50 - (mt->save[i] * 5);
        a = mt->save[0];
    } else {
        for (i=0; i < NROFATTACKS; i++)
            tmp->resist[i] = 5;
        a = 10;
    }
    /* Set weapon's immunity */
    tmp->resist[ATNR_CONFUSION] = 100;
    tmp->resist[ATNR_POISON] = 100;
    tmp->resist[ATNR_SLOW] = 100;
    tmp->resist[ATNR_PARALYZE] = 100;
    tmp->resist[ATNR_TURN_UNDEAD] = 100;
    tmp->resist[ATNR_FEAR] = 100;
    tmp->resist[ATNR_DEPLETE] = 100;
    tmp->resist[ATNR_DEATH] = 100;
    tmp->resist[ATNR_BLIND] = 100;

    /* Improve weapon's armour value according to best save vs. physical of its material */

    if (a > 14) a = 14;
    tmp->resist[ATNR_PHYSICAL] = 100 - (int)((100.0-(float)tmp->resist[ATNR_PHYSICAL])/(30.0-2.0*a));

    /* Determine golem's speed */
    tmp->speed = 0.4 + 0.1 * SP_level_range_adjust(caster,spell);

    if(tmp->speed > 3.33) tmp->speed = 3.33;

    if (!spell->race) {
        sprintf(buf, "animated %s", weapon->name);
        if(tmp->name) free_string(tmp->name);
        tmp->name = add_string(buf);

        tmp->face = weapon->face;
        tmp->animation_id = weapon->animation_id;
        tmp->anim_speed = weapon->anim_speed;
        tmp->last_anim = weapon->last_anim;
        tmp->state = weapon->state;
        if(QUERY_FLAG(weapon, FLAG_ANIMATE)) {
            SET_FLAG(tmp,FLAG_ANIMATE); 
        } else {
            CLEAR_FLAG(tmp,FLAG_ANIMATE); 
        }
        update_ob_speed(tmp);
    }

    /*  make experience increase in proportion to the strength of the summoned creature. */
    tmp->stats.exp *= 1 + (MAX(spell->stats.maxgrace, spell->stats.sp) / caster_level(caster, spell));

    tmp->speed_left= -1;
    tmp->x=x;
    tmp->y=y;
    tmp->direction=dir;
    insert_ob_in_map(tmp,m,op,0);
    return 1;
}

/* cast_daylight() - changes the map darkness level *lower* */

/* cast_change_map_lightlevel: Was cast_daylight/nightfall.
 * This changes the light level for the entire map.
 */

int cast_change_map_lightlevel( object *op, object *caster, object *spell ) {
    int success;

    if(!op->map) return 0;   /* shouldnt happen */ 

    success=change_map_light(op->map,spell->stats.dam);
    if(!success) {
        if (spell->stats.dam < 0)
            new_draw_info(NDI_UNIQUE,0,op,"It can be no brighter here."); 
        else
            new_draw_info(NDI_UNIQUE,0,op,"It can be no darker here."); 
    }
    return success;
}


/* create an aura spell object and put it in the player's inventory.
 * as usual, op is player, caster is the object casting the spell,
 * spell is the spell object itself.
 */
int create_aura(object *op, object *caster, object *spell)
{
    int refresh=0;
    object *new_aura;

    new_aura = present_arch_in_ob(spell->other_arch, op);
    if (new_aura) refresh=1;
    else new_aura = arch_to_object(spell->other_arch);

    new_aura->duration  = spell->duration + 
                  10* SP_level_duration_adjust(caster,spell);

    new_aura->stats.dam = spell->stats.dam
                  +SP_level_dam_adjust(caster,spell);

    set_owner(new_aura,op);
    set_spell_skill(op, caster, spell, new_aura);
    new_aura->attacktype= spell->attacktype;

    new_aura->level = caster_level(caster, spell);
    if (refresh) 
        new_draw_info(NDI_UNIQUE, 0, op, "You recast the spell while in effect.");
    else
        new_draw_info(NDI_UNIQUE, 0, op, "You create an aura of magical force.");
        insert_ob_in_ob(new_aura, op);
    return 1;
}


/* move aura function.  An aura is a part of someone's inventory,
 * which he carries with him, but which acts on the map immediately
 * around him.
 * Aura parameters:
 * duration:  duration counter.   
 * attacktype:  aura's attacktype 
 * other_arch:  archetype to drop where we attack
 */

void move_aura(object *aura) {
    int i, mflags;
    object *env;
    mapstruct *m;

    /* auras belong in inventories */
    env = aura->env;

    /* no matter what we've gotta remove the aura...
     * we'll put it back if its time isn't up.  
     */
    remove_ob(aura);

    /* exit if we're out of gas */
    if(aura->duration--< 0) {
        free_object(aura);
        return;
    }

    /* auras only exist in inventories */
    if(env == NULL || env->map==NULL) {
        free_object(aura);
        return;
    }
    aura->x = env->x;
    aura->y = env->y;

    /* we need to jump out of the inventory for a bit
     * in order to hit the map conveniently. 
     */
    insert_ob_in_map(aura,env->map,aura,0);

    for(i=1;i<9;i++) { 
        sint16 nx, ny;
        nx = aura->x + freearr_x[i];
        ny = aura->y + freearr_y[i];
        mflags = get_map_flags(env->map, &m, nx, ny, &nx, &ny);

        /* Consider the movement tyep of the person with the aura as
         * movement type of the aura.  Eg, if the player is flying, the aura
         * is flying also, if player is walking, it is on the ground, etc.
         */
        if (!(mflags & P_OUT_OF_MAP) && !(OB_TYPE_MOVE_BLOCK(env, GET_MAP_MOVE_BLOCK(m, nx, ny)))) {
            hit_map(aura,i,aura->attacktype,0);

            if(aura->other_arch) {
                object *new_ob;

                new_ob = arch_to_object(aura->other_arch);
                new_ob->x = nx;
                new_ob->y = ny;
                insert_ob_in_map(new_ob,m,aura,0);
            }
        }
    }
    /* put the aura back in the player's inventory */
    remove_ob(aura);
    insert_ob_in_ob(aura, env);
}

/* moves the peacemaker spell.
 * op is the piece object.
 */      

void move_peacemaker(object *op) {
    object *tmp;

    for(tmp=get_map_ob(op->map,op->x,op->y);tmp!=NULL;tmp=tmp->above) {
        int atk_lev, def_lev;
        object *victim=tmp;

        if (tmp->head) victim=tmp->head;
        if (!QUERY_FLAG(victim,FLAG_MONSTER)) continue;
        if (QUERY_FLAG(victim,FLAG_UNAGGRESSIVE)) continue;
        if (victim->stats.exp == 0) continue;

        def_lev = MAX(1,victim->level);
        atk_lev = MAX(1,op->level);

        if (rndm(0, atk_lev-1) > def_lev) {
            /* make this sucker peaceful. */

            change_exp(get_owner(op),victim->stats.exp, op->skill, 0);
            victim->stats.exp=0;
#if 0
            /* No idea why these were all set to zero - if something
             * makes this creature agressive, he should still do damage.
             */
            victim->stats.dam = 0;
            victim->stats.sp = 0;
            victim->stats.grace = 0;
            victim->stats.Pow = 0;
#endif
            victim->attack_movement = RANDO2;
            SET_FLAG(victim,FLAG_UNAGGRESSIVE);
            SET_FLAG(victim,FLAG_RUN_AWAY);
            SET_FLAG(victim,FLAG_RANDOM_MOVE);
            CLEAR_FLAG(victim,FLAG_MONSTER);
            if(victim->name) {
                new_draw_info_format(NDI_UNIQUE,0,op->owner,"%s no longer feels like fighting.",victim->name);
            }
        }
    }
}   
      

/* This writes a rune that contains the appropriate message.
 * There really isn't any adjustments we make.
 */

int write_mark(object *op, object *spell, const char *msg) {
    char rune[HUGE_BUF];
    object *tmp;

    if (!msg || msg[0] == 0) {
        new_draw_info(NDI_UNIQUE, 0, op, "Write what?");
        return 0;
    }

    if (strcasestr_local(msg, "endmsg")) {
        new_draw_info(NDI_UNIQUE, 0, op, "Trying to cheat are we?");
            LOG(llevInfo,"write_rune: player %s tried to write bogus rune %s\n", op->name, msg);
            return 0;
    }
    if (!spell->other_arch) return 0;
    tmp = arch_to_object(spell->other_arch);
    strncpy(rune, msg, HUGE_BUF-2);
    rune[HUGE_BUF-2] = 0;
    strcat(rune, "\n");
    tmp->race = add_string (op->name);  /*Save the owner of the rune*/
    tmp->msg = add_string(rune);
    tmp->x = op->x;
    tmp->y = op->y;
    insert_ob_in_map(tmp, op->map, op, INS_BELOW_ORIGINATOR);
    return 1;
}
Revision:	1.3
Committed:	Sat Aug 26 23:36:34 2006 UTC (17 years, 8 months ago) by root
Content type:	text/plain
Branch:	MAIN
Changes since 1.2:	+2 -297 lines
Log Message:	intermediate check-in, per-object events work