src/items.c

   1 /* Copyright (C) 1996-1997 Aleksey Volynskov
   2  * Copyright (C) 2011 Rambo
   3  * Copyright (C) 2020 SovietPony
   4  *
   5  * This program is free software: you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation, version 3 of the License ONLY.
   8  *
   9  * This program is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU General Public License
  15  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  16  */
  17
  18 #include "glob.h"
  19 #include <stdlib.h>
  20 #include "error.h"
  21 #include "view.h"
  22 #include "items.h"
  23 #include "fx.h"
  24 #include "player.h"
  25 #include "monster.h"
  26 #include "things.h"
  27 #include "misc.h"
  28 #include "map.h"
  29 #include "my.h"
  30 #include "files.h"
  31 #include "game.h"
  32 item_t it[MAXITEM];
  33
  34 static void *snd[4];
  35 static int tsndtm, rsndtm;
  36
  37 int itm_rtime = 1092;
  38
  39 void IT_alloc (void) {
  40   int i, j, n;
  41   static char nm[][6] = {
  42     "ITEMUP", "WPNUP", "GETPOW", "ITMBK"
  43   };
  44   for (i = 0; i < 4; ++i) {
  45     snd[i] = Z_getsnd(nm[i]);
  46   }
  47   for (i = 0; i < MAXITEM; ++i) {
  48     it[i].o.r = 10;
  49     it[i].o.h = 8;
  50   }
  51 }
  52
  53 void IT_init (void) {
  54   int i;
  55   for (i = 0; i < MAXITEM; ++i) {
  56     it[i].t = I_NONE;
  57     it[i].o.xv = 0;
  58     it[i].o.yv = 0;
  59     it[i].o.vx = 0;
  60     it[i].o.vy = 0;
  61   }
  62   tsndtm = 0;
  63   rsndtm = 0;
  64 }
  65
  66 static void takesnd (int t) {
  67   if(tsndtm) return;
  68   t&=0x7FFF;
  69   if(t<=I_CELP || (t>=I_BPACK && t<=I_BFG) || t==I_GUN2)
  70     {tsndtm=Z_sound(snd[1],128);return;}
  71   if(t==I_MEGA || t==I_INVL || t==I_SUPER)
  72     {tsndtm=Z_sound(snd[2],192);return;}
  73   tsndtm=Z_sound(snd[0], 255);
  74 }
  75
  76 void IT_act (void) {
  77   int i,j;
  78
  79   if(tsndtm) --tsndtm;
  80   if(rsndtm) --rsndtm;
  81   for(i=0;i<MAXITEM;++i) if(it[i].t)
  82     if(it[i].s<0) {
  83       if(++it[i].s==-8) {
  84                 FX_ifog(it[i].o.x,it[i].o.y);
  85                 if(!rsndtm) rsndtm=Z_sound(snd[3],128);
  86           }
  87         }else{
  88           switch(it[i].t) {
  89                 case I_ARM1: case I_ARM2:
  90                   if(++it[i].s>=18) it[i].s=0; break;
  91                 case I_MEGA: case I_INVL:
  92                 case I_SUPER: case I_RTORCH: case I_GTORCH: case I_BTORCH:
  93                   if(++it[i].s>=8) it[i].s=0; break;
  94                 case I_GOR1: case I_FCAN:
  95                   if(++it[i].s>=6) it[i].s=0; break;
  96       }
  97           if(it[i].t&0x8000) {
  98                 if((j=Z_moveobj(&it[i].o))&Z_FALLOUT) {it[i].t=0;continue;}
  99                 else if(j&Z_HITWATER) Z_splash(&it[i].o,it[i].o.r+it[i].o.h);
 100           }
 101       if(Z_overlap(&it[i].o,&pl1.o))
 102                 if(PL_give(&pl1,it[i].t&0x7FFF)) {
 103                   takesnd(it[i].t);
 104                   if(_2pl) if((it[i].t&0x7FFF)>=I_KEYR && (it[i].t&0x7FFF)<=I_KEYB) continue;
 105                   if(!(it[i].s=-itm_rtime) || (it[i].t&0x8000)) it[i].t=0;
 106                   continue;
 107                 }
 108           if(_2pl) if(Z_overlap(&it[i].o,&pl2.o))
 109                 if(PL_give(&pl2,it[i].t&0x7FFF)) {
 110                   takesnd(it[i].t);
 111                   if((it[i].t&0x7FFF)>=I_KEYR && (it[i].t&0x7FFF)<=I_KEYB) continue;
 112                   if(!(it[i].s=-itm_rtime) || (it[i].t&0x8000)) it[i].t=0;
 113                   continue;
 114                 }
 115         }
 116 }
 117
 118 void IT_spawn (int x,int y,int t) {
 119   int i;
 120
 121   for(i=0;i<MAXITEM;++i) if(!it[i].t) {
 122         it[i].t=t|0x8000;it[i].s=0;
 123     it[i].o.x=x;it[i].o.y=y;
 124     it[i].o.xv=it[i].o.yv=it[i].o.vx=it[i].o.vy=0;
 125     it[i].o.r=10;it[i].o.h=8;
 126     return;
 127   }
 128 }
 129
 130 void IT_drop_ammo (int t, int n, int x, int y) {
 131   static int an[8]={10,4,1,40,50,25,5,100};
 132   int a;
 133
 134 again:;
 135   for(a=an[t-I_CLIP];n>=a;n-=a)
 136         IT_spawn(x+myrand(3*2+1)-3,y-myrand(7),t);
 137   if(t>=I_AMMO) {t-=4;goto again;}
 138 }