Initial revision

git-svn-id: https://crawl-ref.svn.sourceforge.net/svnroot/crawl-ref/trunk@3 c06c8d41-db1a-0410-9941-cceddc491573

1 files changed, 1065 insertions, 0 deletions

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+/*
+ *  File:       it_use3.cc
+ *  Summary:    Functions for using some of the wackier inventory items.
+ *  Written by: Linley Henzell
+ *
+ *  Change History (most recent first):
+ *
+ *      <4>     6/13/99         BWR             Auto ID Channel staff
+ *      <3>     5/22/99         BWR             SPWLD_POWER is now HP/13 - 3
+ *      <2>     5/20/99         BWR             Capped SPWLD_POWER to +20
+ *      <1>     -/--/--         LRH             Created
+ */
+
+#include "AppHdr.h"
+#include "it_use3.h"
+
+#include <string.h>
+
+#include "externs.h"
+
+#include "beam.h"
+#include "decks.h"
+#include "direct.h"
+#include "effects.h"
+#include "fight.h"
+#include "food.h"
+#include "items.h"
+#include "it_use2.h"
+#include "itemname.h"
+#include "misc.h"
+#include "monplace.h"
+#include "monstuff.h"
+#include "player.h"
+#include "randart.h"
+#include "religion.h"
+#include "skills.h"
+#include "skills2.h"
+#include "spells1.h"
+#include "spells2.h"
+#include "spl-book.h"
+#include "spl-cast.h"
+#include "spl-util.h"
+#include "stuff.h"
+#include "view.h"
+#include "wpn-misc.h"
+
+static bool ball_of_energy(void);
+static bool ball_of_fixation(void);
+static bool ball_of_seeing(void);
+static bool box_of_beasts(void);
+static bool disc_of_storms(void);
+static bool efreet_flask(void);
+
+void special_wielded(void)
+{
+    const int wpn = you.equip[EQ_WEAPON];
+    const int old_plus = you.inv[wpn].plus;
+    const int old_plus2 = you.inv[wpn].plus2;
+    const char old_colour = you.inv[wpn].colour;
+
+    char str_pass[ ITEMNAME_SIZE ];
+    int temp_rand = 0;          // for probability determination {dlb}
+    bool makes_noise = (one_chance_in(20) && !silenced(you.x_pos, you.y_pos));
+
+    switch (you.special_wield)
+    {
+    case SPWLD_SING:
+        if (makes_noise)
+        {
+            strcpy(info, "The Singing Sword ");
+            temp_rand = random2(32);
+            strcat(info,
+                     (temp_rand ==  0) ? "hums a little tune." :
+                     (temp_rand ==  1) ? "breaks into glorious song!" :
+                     (temp_rand ==  2) ? "sings." :
+                     (temp_rand ==  3) ? "sings loudly." :
+                     (temp_rand ==  4) ? "chimes melodiously." :
+                     (temp_rand ==  5) ? "makes a horrible noise." :
+                     (temp_rand ==  6) ? "sings off-key." :
+                     (temp_rand ==  7) ? "sings 'tra-la-la'." :
+                     (temp_rand ==  8) ? "burbles away merrily." :
+                     (temp_rand ==  9) ? "gurgles." :
+                     (temp_rand == 10) ? "suddenly shrieks!" :
+                     (temp_rand == 11) ? "cackles." :
+                     (temp_rand == 12) ? "warbles." :
+                     (temp_rand == 13) ? "chimes harmoniously." :
+                     (temp_rand == 14) ? "makes beautiful music." :
+                     (temp_rand == 15) ? "produces a loud orchestral chord." :
+                     (temp_rand == 16) ? "whines plaintively." :
+                     (temp_rand == 17) ? "tinkles." :
+                     (temp_rand == 18) ? "rings like a bell." :
+                     (temp_rand == 19) ? "wails mournfully." :
+                     (temp_rand == 20) ? "practices its scales." :
+                     (temp_rand == 21) ? "lilts tunefully." :
+                     (temp_rand == 22) ? "hums tunelessly." :
+                     (temp_rand == 23) ? "sighs." :
+                     (temp_rand == 24) ? "makes a deep moaning sound." :
+                     (temp_rand == 25) ? "makes a popping sound." :
+                     (temp_rand == 26) ? "sings a sudden staccato note." :
+                     (temp_rand == 27) ? "says 'Hi! I'm the Singing Sword!'." :
+                     (temp_rand == 28) ? "whispers something." :
+                     (temp_rand == 29) ? "speaks gibberish." :
+                     (temp_rand == 30) ? "raves incoherently."
+                                       : "yells in some weird language.");
+            mpr(info);
+        }
+        break;
+
+    case SPWLD_CURSE:
+        makes_noise = false;
+
+        if (one_chance_in(30))
+            curse_an_item(0, 0);
+        break;
+
+    case SPWLD_VARIABLE:
+        makes_noise = false;
+
+        do_uncurse_item( you.inv[wpn] );
+
+        if (random2(5) < 2)     // 40% chance {dlb}
+            you.inv[wpn].plus  += (coinflip() ? +1 : -1);
+
+        if (random2(5) < 2)     // 40% chance {dlb}
+            you.inv[wpn].plus2 += (coinflip() ? +1 : -1);
+
+        if (you.inv[wpn].plus < -4)
+            you.inv[wpn].plus = -4;
+        else if (you.inv[wpn].plus > 16)
+            you.inv[wpn].plus = 16;
+
+        if (you.inv[wpn].plus2 < -4)
+            you.inv[wpn].plus2 = -4;
+        else if (you.inv[wpn].plus2 > 16)
+            you.inv[wpn].plus2 = 16;
+
+        you.inv[wpn].colour = random_colour();
+        break;
+
+    case SPWLD_TORMENT:
+        makes_noise = false;
+
+        if (one_chance_in(200))
+        {
+            torment( you.x_pos, you.y_pos );
+            naughty( NAUGHTY_UNHOLY, 1 );
+        }
+        break;
+
+    case SPWLD_ZONGULDROK:
+        makes_noise = false;
+
+        if (one_chance_in(5))
+        {
+            animate_dead( 1 + random2(3), BEH_HOSTILE, MHITYOU, 1 );
+            naughty( NAUGHTY_NECROMANCY, 1 );
+        }
+        break;
+
+    case SPWLD_POWER:
+        makes_noise = false;
+
+        you.inv[wpn].plus = stepdown_value( -4 + (you.hp / 5), 4, 4, 4, 20 );
+        you.inv[wpn].plus2 = you.inv[wpn].plus;
+        break;
+
+    case SPWLD_OLGREB:
+        makes_noise = false;
+
+        // Giving Olgreb's staff a little lift since staves of poison have
+        // been made better. -- bwr
+        you.inv[wpn].plus = you.skills[SK_POISON_MAGIC] / 3;
+        you.inv[wpn].plus2 = you.inv[wpn].plus;
+        break;
+
+    case SPWLD_WUCAD_MU:
+        makes_noise = false;
+
+        you.inv[wpn].plus  = ((you.intel > 25) ? 22 : you.intel - 3);
+        you.inv[wpn].plus2 = ((you.intel > 25) ? 13 : you.intel / 2);
+        break;
+
+    case SPWLD_SHADOW:
+        makes_noise = false;
+
+        if (random2(8) <= player_spec_death())
+        {
+            naughty( NAUGHTY_NECROMANCY, 1 );
+            create_monster( MONS_SHADOW, ENCH_ABJ_II, BEH_FRIENDLY,
+                            you.x_pos, you.y_pos, you.pet_target, 250 );
+        }
+
+        show_green = DARKGREY;
+        break;
+
+    case SPWLD_HUM:
+        if (makes_noise)
+        {
+            in_name(wpn, DESC_CAP_YOUR, str_pass);
+            strcpy(info, str_pass);
+            strcat(info, " lets out a weird humming sound.");
+            mpr(info);
+        }
+        break;                  // to noisy() call at foot 2apr2000 {dlb}
+
+    case SPWLD_CHIME:
+        if (makes_noise)
+        {
+            in_name(wpn, DESC_CAP_YOUR, str_pass);
+            strcpy(info, str_pass);
+            strcat(info, " chimes like a gong.");
+            mpr(info);
+        }
+        break;
+
+    case SPWLD_BECKON:
+        if (makes_noise)
+            mpr("You hear a voice call your name.");
+        break;
+
+    case SPWLD_SHOUT:
+        if (makes_noise)
+            mpr("You hear a shout.");
+        break;
+
+    //case SPWLD_PRUNE:
+    default:
+        return;
+    }
+
+    if (makes_noise)
+        noisy( 25, you.x_pos, you.y_pos );
+
+    if (old_plus != you.inv[wpn].plus
+        || old_plus2 != you.inv[wpn].plus2
+        || old_colour != you.inv[wpn].colour)
+    {
+        you.wield_change = true;
+    }
+
+    return;
+}                               // end special_wielded()
+
+static void reaching_weapon_attack(void)
+{
+    struct dist beam;
+    int x_distance, y_distance;
+    int x_middle, y_middle;
+    int skill;
+
+    mpr("Attack whom?", MSGCH_PROMPT);
+
+    direction( beam, DIR_TARGET, TARG_ENEMY );
+    if (!beam.isValid)
+        return;
+
+    if (beam.isMe)
+    {
+        canned_msg(MSG_UNTHINKING_ACT);
+        return;
+    }
+
+    x_distance = abs(beam.tx - you.x_pos);
+    y_distance = abs(beam.ty - you.y_pos);
+
+    if (x_distance > 2 || y_distance > 2)
+        mpr("Your weapon cannot reach that far!");
+    else if (mgrd[beam.tx][beam.ty] == NON_MONSTER)
+    {
+        mpr("You attack empty space.");
+    }
+    else
+    {
+        /* BCR - Added a check for monsters in the way.  Only checks cardinal
+         *       directions.  Knight moves are ignored.  Assume the weapon
+         *       slips between the squares.
+         */
+
+        // if we're attacking more than a space away
+        if ((x_distance > 1) || (y_distance > 1))
+        {
+
+#define MAX(x,y) (((x) > (y)) ? (x) : (y))
+            x_middle = MAX(beam.tx, you.x_pos) - (x_distance / 2);
+            y_middle = MAX(beam.ty, you.y_pos) - (y_distance / 2);
+#undef MAX
+
+            // if either the x or the y is the same, we should check for
+            // a monster:
+            if (((beam.tx == you.x_pos) || (beam.ty == you.y_pos))
+                    && (mgrd[x_middle][y_middle] != NON_MONSTER))
+            {
+                skill = weapon_skill( you.inv[you.equip[EQ_WEAPON]].base_type,
+                                      you.inv[you.equip[EQ_WEAPON]].sub_type );
+
+                if ((5 + (3 * skill)) > random2(100))
+                {
+                    mpr("You reach to attack!");
+                    you_attack(mgrd[beam.tx][beam.ty], false);
+                }
+                else
+                {
+                    mpr("You could not reach far enough!");
+                    you_attack(mgrd[x_middle][y_middle], false);
+                }
+            }
+            else
+            {
+                mpr("You reach to attack!");
+                you_attack(mgrd[beam.tx][beam.ty], false);
+            }
+        }
+        else
+        {
+            you_attack(mgrd[beam.tx][beam.ty], false);
+        }
+    }
+
+    return;
+}                               // end reaching_weapon_attack()
+
+// returns true if item successfully evoked.
+bool evoke_wielded( void )
+{
+    char opened_gates = 0;
+    unsigned char spell_casted = random2(21);
+    int count_x, count_y;
+    int temp_rand = 0;      // for probability determination {dlb}
+    int power = 0;
+
+    int pract = 0;
+    bool did_work = false;  // used for default "nothing happens" message
+
+    char str_pass[ ITEMNAME_SIZE ];
+
+    int wield = you.equip[EQ_WEAPON];
+
+    if (you.berserker)
+    {
+        canned_msg( MSG_TOO_BERSERK );
+        return (false);
+    }
+    else if (wield == -1)
+    {
+        mpr("You aren't wielding anything!");
+        return (false);
+    }
+
+    switch (you.inv[wield].base_type)
+    {
+    case OBJ_WEAPONS:
+        if (get_weapon_brand( you.inv[wield] ) == SPWPN_REACHING
+            && enough_mp(1, false))
+        {
+            // needed a cost to prevent evocation training abuse -- bwr
+            dec_mp(1);
+            make_hungry( 50, false );  
+            reaching_weapon_attack();
+            pract = (one_chance_in(5) ? 1 : 0);
+            did_work = true;
+        }
+        else if (is_fixed_artefact( you.inv[wield] ))
+        {
+            switch (you.inv[wield].special)
+            {
+            case SPWPN_STAFF_OF_DISPATER:
+                if (you.deaths_door || !enough_hp(11, true) 
+                    || !enough_mp(5, true))
+                {
+                    break;
+                }
+
+                mpr("You feel the staff feeding on your energy!");
+
+                dec_hp( 5 + random2avg(19, 2), false );
+                dec_mp( 2 + random2avg(5, 2) );
+                make_hungry( 100, false );
+
+                power = you.skills[SK_EVOCATIONS] * 8;
+                your_spells( SPELL_HELLFIRE, power, false );
+                pract = (coinflip() ? 2 : 1);
+                did_work = true;
+                break;
+
+            // let me count the number of ways spell_casted is
+            // used here ... one .. two .. three ... >CRUNCH<
+            // three licks to get to the center of a ... {dlb}
+            case SPWPN_SCEPTRE_OF_ASMODEUS:
+                spell_casted = random2(21);
+
+                if (spell_casted == 0)
+                    break;
+
+                make_hungry( 200, false );
+                pract = 1;
+
+                if (spell_casted < 2)   // summon devils, maybe a Fiend
+                {
+
+                    spell_casted = (one_chance_in(4) ? MONS_FIEND
+                                                 : MONS_HELLION + random2(10));
+
+                    bool good_summon = (create_monster( spell_casted, 
+                                            ENCH_ABJ_VI, BEH_HOSTILE,
+                                            you.x_pos, you.y_pos, 
+                                            MHITYOU, 250) != -1);
+
+                    if (good_summon)
+                    {
+                        if (spell_casted == MONS_FIEND)
+                            mpr("\"Your arrogance condemns you, mortal!\"");
+                        else
+                            mpr("The Sceptre summons one of its servants.");
+                    }
+
+                    did_work = true;
+                    break;
+                }
+
+                temp_rand = random2(240);
+
+                if (temp_rand > 125)
+                    spell_casted = SPELL_BOLT_OF_FIRE;      // 114 in 240
+                else if (temp_rand > 68)
+                    spell_casted = SPELL_LIGHTNING_BOLT;    //  57 in 240
+                else if (temp_rand > 11)
+                    spell_casted = SPELL_BOLT_OF_DRAINING;  //  57 in 240
+                else
+                    spell_casted = SPELL_HELLFIRE;          //  12 in 240
+
+                power = you.skills[SK_EVOCATIONS] * 8;
+                your_spells( spell_casted, power, false );
+                did_work = true;
+                break;
+
+            case SPWPN_STAFF_OF_OLGREB:
+                if (!enough_mp( 4, true ) 
+                    || you.skills[SK_EVOCATIONS] < random2(6))
+                {
+                    break;
+                }
+
+                dec_mp(4);
+                make_hungry( 50, false );
+                pract = 1;
+                did_work = true;
+
+                power = 10 + you.skills[SK_EVOCATIONS] * 8;
+
+                your_spells( SPELL_OLGREBS_TOXIC_RADIANCE, power, false );
+
+                if (you.skills[SK_EVOCATIONS] >= random2(10))
+                    your_spells( SPELL_VENOM_BOLT, power, false );
+                break;
+
+            case SPWPN_STAFF_OF_WUCAD_MU:
+                if (you.magic_points == you.max_magic_points
+                    || you.skills[SK_EVOCATIONS] < random2(25))
+                {
+                    break;
+                }
+
+                mpr("Magical energy flows into your mind!");
+
+                inc_mp( 3 + random2(5) + you.skills[SK_EVOCATIONS] / 3, false );
+                make_hungry( 50, false );
+                pract = 1;
+                did_work = true;
+
+                if (one_chance_in(3))
+                {
+                    miscast_effect( SPTYP_DIVINATION, random2(9), 
+                                    random2(70), 100, "the Staff of Wucad Mu" );
+                }
+                break;
+
+            default:
+                break;
+            }
+        }
+        break;
+
+    case OBJ_STAVES:
+        if (item_is_rod( you.inv[wield] ))
+        {
+            pract = staff_spell( wield );
+            did_work = true;  // staff_spell() will handle messages
+        } 
+        else if (you.inv[wield].sub_type == STAFF_CHANNELING)
+        {
+            if (you.magic_points < you.max_magic_points 
+                && you.skills[SK_EVOCATIONS] >= random2(30)) 
+            {
+                mpr("You channel some magical energy.");
+                inc_mp( 1 + random2(3), false );
+                make_hungry( 50, false );
+                pract = (one_chance_in(5) ? 1 : 0);
+                did_work = true;
+
+                if (item_not_ident( you.inv[you.equip[EQ_WEAPON]], 
+                                    ISFLAG_KNOW_TYPE ))
+                {
+                    set_ident_flags( you.inv[you.equip[EQ_WEAPON]], 
+                                     ISFLAG_KNOW_TYPE );
+
+                    strcpy( info, "You are wielding " );
+                    in_name( you.equip[EQ_WEAPON], DESC_NOCAP_A, str_pass );
+                    strcat( info, str_pass );
+                    strcat( info, "." );
+
+                    mpr( info );
+                    more();
+
+                    you.wield_change = true;
+                }
+            }
+        }
+        break;
+
+    case OBJ_MISCELLANY:
+        did_work = true; // easier to do it this way for misc items
+        switch (you.inv[wield].sub_type)
+        {
+        case MISC_BOTTLED_EFREET:
+            if (efreet_flask())
+                pract = 2;
+            break;
+
+        case MISC_CRYSTAL_BALL_OF_SEEING:
+            if (ball_of_seeing())
+                pract = 1;
+            break;
+
+        case MISC_AIR_ELEMENTAL_FAN:
+            if (you.skills[SK_EVOCATIONS] <= random2(30))
+                canned_msg(MSG_NOTHING_HAPPENS);
+            else
+            {
+                summon_elemental(100, MONS_AIR_ELEMENTAL, 4);
+                pract = (one_chance_in(5) ? 1 : 0);
+            }
+            break;
+
+        case MISC_LAMP_OF_FIRE:
+            if (you.skills[SK_EVOCATIONS] <= random2(30))
+                canned_msg(MSG_NOTHING_HAPPENS);
+            else
+            {
+                summon_elemental(100, MONS_FIRE_ELEMENTAL, 4);
+                pract = (one_chance_in(5) ? 1 : 0);
+            }
+            break;
+
+        case MISC_STONE_OF_EARTH_ELEMENTALS:
+            if (you.skills[SK_EVOCATIONS] <= random2(30))
+                canned_msg(MSG_NOTHING_HAPPENS);
+            else
+            {
+                summon_elemental(100, MONS_EARTH_ELEMENTAL, 4);
+                pract = (one_chance_in(5) ? 1 : 0);
+            }
+            break;
+
+        case MISC_HORN_OF_GERYON:
+            // Note: This assumes that the Vestibule has not been changed.
+            if (player_in_branch( BRANCH_VESTIBULE_OF_HELL ))
+            {
+                mpr("You produce a weird and mournful sound.");
+
+                for (count_x = 0; count_x < GXM; count_x++)
+                {
+                    for (count_y = 0; count_y < GYM; count_y++)
+                    {
+                        if (grd[count_x][count_y] == DNGN_STONE_ARCH)
+                        {
+                            opened_gates++;
+
+                            // this may generate faulty [][] values {dlb}
+                            switch (grd[count_x + 2][count_y])
+                            {
+                            case DNGN_FLOOR:
+                                grd[count_x][count_y] = DNGN_ENTER_DIS;
+                                break;
+                            case DNGN_LAVA:
+                                grd[count_x][count_y] = DNGN_ENTER_GEHENNA;
+                                break;
+                            case DNGN_ROCK_WALL:
+                                grd[count_x][count_y] = DNGN_ENTER_TARTARUS;
+                                break;
+                            case DNGN_DEEP_WATER:
+                                grd[count_x][count_y] = DNGN_ENTER_COCYTUS;
+                                break;
+                            }
+                        }
+                    }
+                }
+
+                if (opened_gates)
+                {
+                    mpr("Your way has been unbarred.");
+                    pract = 1;
+                }
+            }
+            else
+            {
+                mpr("You produce a hideous howling noise!");
+                pract = (one_chance_in(3) ? 1 : 0);
+                create_monster( MONS_BEAST, ENCH_ABJ_IV, BEH_HOSTILE, 
+                                you.x_pos, you.y_pos, MHITYOU, 250 );
+            }
+            break;
+
+        case MISC_DECK_OF_WONDERS:
+            deck_of_cards(DECK_OF_WONDERS);
+            pract = 1;
+            break;
+
+        case MISC_DECK_OF_SUMMONINGS:
+            deck_of_cards(DECK_OF_SUMMONING);
+            pract = 1;
+            break;
+
+        case MISC_DECK_OF_TRICKS:
+            deck_of_cards(DECK_OF_TRICKS);
+            pract = 1;
+            break;
+
+        case MISC_DECK_OF_POWER:
+            deck_of_cards(DECK_OF_POWER);
+            pract = 1;
+            break;
+
+        case MISC_BOX_OF_BEASTS:
+            if (box_of_beasts())
+                pract = 1;
+            break;
+
+        case MISC_CRYSTAL_BALL_OF_ENERGY:
+            if (ball_of_energy())
+                pract = 1;
+            break;
+
+        case MISC_CRYSTAL_BALL_OF_FIXATION:
+            if (ball_of_fixation())
+                pract = 1;
+            break;
+
+        case MISC_DISC_OF_STORMS:
+            if (disc_of_storms())
+                pract = (coinflip() ? 2 : 1);
+            break;
+
+        case MISC_PORTABLE_ALTAR_OF_NEMELEX:
+            if (player_in_branch( BRANCH_ECUMENICAL_TEMPLE ))
+            {
+                mpr( "Don't you think this level already has more than "
+                     "enough altars?" );
+            }
+            else if (grd[you.x_pos][you.y_pos] != DNGN_FLOOR)
+                mpr("You need a clear area to place this item.");
+            else
+            {
+                mpr("You unfold the altar and place it on the floor.");
+                grd[you.x_pos][you.y_pos] = DNGN_ALTAR_NEMELEX_XOBEH;
+                dec_inv_item_quantity( you.equip[EQ_WEAPON], 1 );
+            }
+            break;
+
+        default:
+            did_work = false;
+            break;
+        }
+        break;
+
+    default:
+        break;
+    }
+
+    if (!did_work)
+        canned_msg(MSG_NOTHING_HAPPENS);
+    else if (pract > 0)
+        exercise( SK_EVOCATIONS, pract );
+
+    you.turn_is_over = 1;
+
+    return (did_work);
+}                               // end evoke_wielded()
+
+static bool efreet_flask(void)
+{
+    const int behaviour = ((you.skills[SK_EVOCATIONS] > random2(20)) 
+                                ? BEH_FRIENDLY : BEH_HOSTILE);
+
+    mpr("You open the flask...");
+
+    dec_inv_item_quantity( you.equip[EQ_WEAPON], 1 );
+
+    if (create_monster( MONS_EFREET, ENCH_ABJ_V, behaviour, 
+                        you.x_pos, you.y_pos, MHITYOU, 250 ) != -1)
+    {
+        mpr( "...and a huge efreet comes out." );
+
+        mpr( (behaviour == BEH_FRIENDLY) ? "\"Thank you for releasing me!\""
+                                         : "It howls insanely!" );
+    }
+    else
+        canned_msg(MSG_NOTHING_HAPPENS);
+
+    return (true);
+}                               // end efreet_flask()
+
+static bool ball_of_seeing(void)
+{
+    int use = 0;
+    bool ret = false;
+
+    mpr("You gaze into the crystal ball.");
+
+    use = ((!you.conf) ? random2(you.skills[SK_EVOCATIONS] * 6) : random2(5));
+
+    if (use < 2)
+    {
+        lose_stat( STAT_INTELLIGENCE, 1 );
+    }
+    else if (use < 5 && enough_mp(1, true))
+    {
+        mpr("You feel power drain from you!");
+        set_mp(0, false);
+    }
+    else if (use < 10)
+    {
+        confuse_player( 10 + random2(10), false );
+    }
+    else if (use < 15
+             || you.level_type == LEVEL_LABYRINTH
+             || you.level_type == LEVEL_ABYSS || coinflip())
+    {
+        mpr("You see nothing.");
+    }
+    else
+    {
+        mpr("You see a map of your surroundings!");
+        magic_mapping( 15, 50 + random2( you.skills[SK_EVOCATIONS] ) );
+        ret = true;
+    }
+
+    return (ret);
+}                               // end ball_of_seeing()
+
+static bool disc_of_storms(void)
+{
+    int temp_rand = 0;          // probability determination {dlb}
+    struct bolt beam;
+    int disc_count = 0;
+    unsigned char which_zap = 0;
+
+    const int fail_rate = (30 - you.skills[SK_EVOCATIONS]);
+    bool ret = false;
+
+    if (player_res_electricity() || (random2(100) < fail_rate))
+        canned_msg(MSG_NOTHING_HAPPENS);
+    else if (random2(100) < fail_rate)
+        mpr("The disc glows for a moment, then fades.");
+    else if (random2(100) < fail_rate)
+        mpr("Little bolts of electricity crackle over the disc.");
+    else
+    {
+        mpr("The disc erupts in an explosion of electricity!");
+
+        disc_count = roll_dice( 2, 1 + you.skills[SK_EVOCATIONS] / 7 );
+
+        while (disc_count)
+        {
+            temp_rand = random2(3);
+
+            which_zap = ((temp_rand > 1) ? ZAP_LIGHTNING :
+                         (temp_rand > 0) ? ZAP_ELECTRICITY
+                                         : ZAP_ORB_OF_ELECTRICITY);
+
+            beam.source_x = you.x_pos;
+            beam.source_y = you.y_pos;
+            beam.target_x = you.x_pos + random2(13) - 6;
+            beam.target_y = you.y_pos + random2(13) - 6;
+
+            zapping( which_zap, 30 + you.skills[SK_EVOCATIONS] * 2, beam );
+
+            disc_count--;
+        }
+
+        ret = true;
+    }
+
+    return (ret);
+}                               // end disc_of_storms()
+
+void tome_of_power(char sc_read_2)
+{
+    int temp_rand = 0;          // probability determination {dlb}
+
+    int powc = 5 + you.skills[SK_EVOCATIONS] 
+                 + roll_dice( 5, you.skills[SK_EVOCATIONS] ); 
+
+    int spell_casted = 0;
+    struct bolt beam;
+
+    strcpy(info, "The book opens to a page covered in ");
+
+    char wc[30];
+    weird_writing( wc );
+    strcat( info, wc );
+    strcat( info, "." );
+    mpr( info );
+
+    you.turn_is_over = 1;
+
+    if (!yesno("Read it?"))
+        return;
+
+    set_ident_flags( you.inv[sc_read_2], ISFLAG_IDENT_MASK );
+
+    if (you.mutation[MUT_BLURRY_VISION] > 0
+        && random2(4) < you.mutation[MUT_BLURRY_VISION])
+    {
+        mpr("The page is too blurry for you to read.");
+        return;
+    }
+
+    mpr("You find yourself reciting the magical words!");
+    exercise( SK_EVOCATIONS, 1 ); 
+
+    temp_rand = random2(50) + random2( you.skills[SK_EVOCATIONS] / 3 ); 
+
+    switch (random2(50))
+    {
+    case 0:
+    case 3:
+    case 4:
+    case 6:
+    case 7:
+    case 8:
+    case 9:
+        mpr("A cloud of weird smoke pours from the book's pages!");
+        big_cloud( CLOUD_GREY_SMOKE + random2(3), you.x_pos, you.y_pos, 20,
+                                                          10 + random2(8) );
+        return;
+    case 1:
+    case 14:
+        mpr("A cloud of choking fumes pours from the book's pages!");
+        big_cloud(CLOUD_POISON, you.x_pos, you.y_pos, 20, 7 + random2(5));
+        return;
+
+    case 2:
+    case 13:
+        mpr("A cloud of freezing gas pours from the book's pages!");
+        big_cloud(CLOUD_COLD, you.x_pos, you.y_pos, 20, 8 + random2(5));
+        return;
+
+    case 5:
+    case 11:
+    case 12:
+        if (one_chance_in(5))
+        {
+            mpr("The book disappears in a mighty explosion!");
+            dec_inv_item_quantity( sc_read_2, 1 );
+        }
+
+        beam.type = SYM_BURST;
+        beam.damage = dice_def( 3, 15 );
+        // unsure about this    // BEAM_EXPLOSION instead? [dlb]
+        beam.flavour = BEAM_FIRE;
+        beam.target_x = you.x_pos;
+        beam.target_y = you.y_pos;
+        strcpy( beam.beam_name, "fiery explosion" );
+        beam.colour = RED;
+        // your explosion, (not someone else's explosion)
+        beam.beam_source = NON_MONSTER;
+        beam.thrower = KILL_YOU;
+        beam.aux_source = "an exploding Tome of Power";
+        beam.ex_size = 2;
+        beam.isTracer = false;
+
+        explosion(beam);
+        return;
+
+
+    case 10:
+        if (create_monster( MONS_ABOMINATION_SMALL, ENCH_ABJ_VI, BEH_HOSTILE,
+                            you.x_pos, you.y_pos, MHITYOU, 250 ) != -1)
+        {
+            mpr("A horrible Thing appears!");
+            mpr("It doesn't look too friendly.");
+        }
+        return;
+    }
+
+    viewwindow(1, false);
+
+    temp_rand = random2(23) + random2( you.skills[SK_EVOCATIONS] / 3 );
+
+    if (temp_rand > 25)
+        temp_rand = 25;
+
+    spell_casted = ((temp_rand > 19) ? SPELL_FIREBALL :
+                    (temp_rand > 16) ? SPELL_BOLT_OF_FIRE :
+                    (temp_rand > 13) ? SPELL_BOLT_OF_COLD :
+                    (temp_rand > 11) ? SPELL_LIGHTNING_BOLT :
+                    (temp_rand > 10) ? SPELL_LEHUDIBS_CRYSTAL_SPEAR :
+                    (temp_rand >  9) ? SPELL_VENOM_BOLT :
+                    (temp_rand >  8) ? SPELL_BOLT_OF_DRAINING :
+                    (temp_rand >  7) ? SPELL_BOLT_OF_INACCURACY :
+                    (temp_rand >  6) ? SPELL_STICKY_FLAME :
+                    (temp_rand >  5) ? SPELL_TELEPORT_SELF :
+                    (temp_rand >  4) ? SPELL_CIGOTUVIS_DEGENERATION :
+                    (temp_rand >  3) ? SPELL_POLYMORPH_OTHER :
+                    (temp_rand >  2) ? SPELL_MEPHITIC_CLOUD :
+                    (temp_rand >  1) ? SPELL_THROW_FLAME :
+                    (temp_rand >  0) ? SPELL_THROW_FROST
+                                     : SPELL_MAGIC_DART);
+
+    your_spells( spell_casted, powc, false );
+}                               // end tome_of_power()
+
+void skill_manual(char sc_read_2)
+{
+    char skname[30];
+
+    set_ident_flags( you.inv[sc_read_2], ISFLAG_IDENT_MASK );
+
+    strcpy(skname, skill_name(you.inv[sc_read_2].plus));
+
+    strcpy(info, "This is a manual of ");
+    strcat(info, skname);
+    strcat(info, "!");
+    mpr(info);
+
+    you.turn_is_over = 1;
+
+    if (!yesno("Read it?"))
+        return;
+
+    strcpy(info, "You read about ");
+    strcat(info, strlwr(skname));
+    strcat(info, ".");
+    mpr(info);
+
+    exercise( you.inv[sc_read_2].plus, 500 );
+
+    if (one_chance_in(10))
+    {
+        mpr("The book crumbles into dust.");
+        dec_inv_item_quantity( sc_read_2, 1 );
+    }
+    else
+    {
+        mpr("The book looks somewhat more worn.");
+    }
+}                               // end skill_manual()
+
+static bool box_of_beasts(void)
+{
+    int beasty = MONS_PROGRAM_BUG;      // error trapping {dlb}
+    int temp_rand = 0;          // probability determination {dlb}
+
+    int ret = false;
+
+    mpr("You open the lid...");
+
+    if (random2(100) < 60 + you.skills[SK_EVOCATIONS])
+    {
+        temp_rand = random2(11);
+
+        beasty = ((temp_rand == 0) ? MONS_GIANT_BAT :
+                  (temp_rand == 1) ? MONS_HOUND :
+                  (temp_rand == 2) ? MONS_JACKAL :
+                  (temp_rand == 3) ? MONS_RAT :
+                  (temp_rand == 4) ? MONS_ICE_BEAST :
+                  (temp_rand == 5) ? MONS_SNAKE :
+                  (temp_rand == 6) ? MONS_YAK :
+                  (temp_rand == 7) ? MONS_BUTTERFLY :
+                  (temp_rand == 8) ? MONS_HELL_HOUND :
+                  (temp_rand == 9) ? MONS_BROWN_SNAKE 
+                                   : MONS_GIANT_LIZARD);
+
+        int beh = (one_chance_in(you.skills[SK_EVOCATIONS] + 5) ? BEH_HOSTILE
+                                                                : BEH_FRIENDLY);
+
+        if (create_monster( beasty, ENCH_ABJ_II + random2(4), beh,
+                            you.x_pos, you.y_pos, MHITYOU, 250 ) != -1)
+        {
+            mpr("...and something leaps out!");
+            ret = true;
+        }
+    }
+    else
+    {
+        if (!one_chance_in(6))
+            mpr("...but nothing happens.");
+        else
+        {
+            mpr("...but the box appears empty.");
+            you.inv[you.equip[EQ_WEAPON]].sub_type = MISC_EMPTY_EBONY_CASKET;
+        }
+    }
+
+    return (ret);
+}                               // end box_of_beasts()
+
+static bool ball_of_energy(void)
+{
+    int use = 0;
+    int proportional = 0;
+
+    bool ret = false;
+
+    mpr("You gaze into the crystal ball.");
+
+    use = ((!you.conf) ? random2(you.skills[SK_EVOCATIONS] * 6) : random2(6));
+
+    if (use < 2 || you.max_magic_points == 0)
+    {
+        lose_stat(STAT_INTELLIGENCE, 1);
+    }
+    else if ((use < 4 && enough_mp(1, true))
+             || you.magic_points == you.max_magic_points)
+    {
+        mpr( "You feel your power drain away!" );
+        set_mp( 0, false );
+    }
+    else if (use < 6)
+    {
+        confuse_player( 10 + random2(10), false );
+    }
+    else
+    {
+        proportional = you.magic_points * 100;
+        proportional /= you.max_magic_points;
+
+        if (random2avg(77 - you.skills[SK_EVOCATIONS] * 2, 4) > proportional 
+            || one_chance_in(25))
+        {
+            mpr( "You feel your power drain away!" );
+            set_mp( 0, false );
+        }
+        else
+        {
+            mpr( "You are suffused with power!" );
+            inc_mp( 6 + roll_dice( 2, you.skills[SK_EVOCATIONS] ), false );
+
+            ret = true;
+        }
+    }
+
+    return (ret);
+}                               // end ball_of_energy()
+
+static bool ball_of_fixation(void)
+{
+    mpr("You gaze into the crystal ball.");
+    mpr("You are mesmerised by a rainbow of scintillating colours!");
+
+    you.paralysis = 100;
+    you.slow = 100;
+
+    return (true);
+}                               // end ball_of_fixation()