src/weapons.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 "view.h"
  21 #include "bmap.h"
  22 #include "dots.h"
  23 #include "smoke.h"
  24 #include "weapons.h"
  25 #include "misc.h"
  26 #include "files.h"
  27 #include "game.h"
  28 #include "player.h"
  29 #include "monster.h"
  30 #include "switch.h"
  31
  32 enum{NONE=0,ROCKET,PLASMA,APLASMA,BALL1,BALL2,BALL7,BFGBALL,BFGHIT,
  33      MANF,REVF,FIRE};
  34
  35 weapon_t wp[MAXWPN];
  36
  37 static void *snd[14];
  38 static void throw(int,int,int,int,int,int,int,int);
  39
  40 void WP_alloc (void) {
  41   int i;
  42   static char nm[14][6]={
  43         "PISTOL",
  44         "SHOTGN",
  45         "DSHTGN",
  46         "RLAUNC",
  47         "RXPLOD",
  48         "PLASMA",
  49         "FIRSHT",
  50         "FIRXPL",
  51         "BAREXP",
  52         "PUNCH",
  53         "SAWHIT",
  54         "MGUN",
  55         "SPARK1",
  56         "SPARK2"
  57   };
  58   for(i=0;i<14;++i) snd[i]=Z_getsnd(nm[i]);
  59 }
  60
  61 void WP_init (void) {
  62   int i;
  63
  64   for(i=0;i<MAXWPN;++i) wp[i].t=NONE;
  65 }
  66
  67 void WP_act (void) {
  68   int i,st;
  69   static obj_t o;
  70
  71   for(i=0;i<MAXWPN;++i) if(wp[i].t) {
  72         if(wp[i].t==ROCKET || wp[i].t==REVF)
  73           SMK_gas(wp[i].o.x+Z_sign(wp[i].o.xv)*2,
  74             wp[i].o.y-wp[i].o.h/2,3,3,
  75             wp[i].o.xv+wp[i].o.vx,wp[i].o.yv+wp[i].o.vy,64
  76           );
  77         --wp[i].o.yv;st=Z_moveobj(&wp[i].o);
  78         if(st&Z_FALLOUT) {wp[i].t=0;continue;}
  79         if(st&Z_HITWATER) switch(wp[i].t) {
  80           case PLASMA: case APLASMA:
  81           case BFGBALL:
  82                 break;
  83           default:
  84                 Z_splash(&wp[i].o,wp[i].o.r+wp[i].o.h);break;
  85         }
  86         switch(wp[i].t) {
  87           case REVF:
  88                 if(Z_getobjpos(wp[i].target,&o))
  89                   throw(i,wp[i].o.x,wp[i].o.y-2,o.x+o.xv+o.vx,o.y+o.yv+o.vy,2,5,12);
  90           case ROCKET:
  91                 if(wp[i].s>=2) {if(++wp[i].s>=8) wp[i].t=0; break;}
  92                 if(st&Z_HITAIR) Z_set_speed(&wp[i].o,12);
  93                 if(st&(Z_HITWALL|Z_HITCEIL|Z_HITLAND)) {
  94                   wp[i].s=2;wp[i].o.xv=wp[i].o.yv=0;Z_sound(snd[4],128);
  95                   Z_explode(wp[i].o.x,wp[i].o.y,30,wp[i].own);break;}
  96                 else if(Z_hit(&wp[i].o,10,wp[i].own,HIT_SOME)) {
  97                   wp[i].s=2;wp[i].o.xv=wp[i].o.yv=0;Z_sound(snd[4],128);
  98                   Z_explode(wp[i].o.x,wp[i].o.y-wp[i].o.h/2,30,wp[i].own);break;}
  99                 bfg_fly(wp[i].o.x,wp[i].o.y-wp[i].o.h/2,wp[i].own);
 100                 break;
 101           case PLASMA:
 102           case APLASMA:
 103                 if(st&Z_INWATER) {
 104                   Z_sound(snd[12],128);
 105                   Z_water_trap(&wp[i].o);
 106                   Z_chktrap(1,10,wp[i].own,HIT_ELECTRO);
 107                   Z_untrap(5);
 108                   wp[i].t=0;break;
 109                 }
 110           case BALL1:
 111           case BALL7:
 112           case BALL2:
 113           case MANF:
 114                 if(wp[i].s>=2)
 115                   {if(++wp[i].s>=((wp[i].t==BALL1 || wp[i].t==BALL7 || wp[i].t==BALL2 || wp[i].t==MANF)?8:12)) wp[i].t=0; break;}
 116                 if(st&Z_HITAIR) Z_set_speed(&wp[i].o,16);
 117                 if(st&(Z_HITWALL|Z_HITCEIL|Z_HITLAND))
 118                   {wp[i].s=2;wp[i].o.xv=wp[i].o.yv=0;Z_sound(snd[7],128);break;}
 119                 else if(Z_hit(&wp[i].o,(wp[i].t==BALL7 || wp[i].t==MANF)?40:((wp[i].t==BALL2)?20:5),wp[i].own,HIT_SOME))
 120                   {wp[i].s=2;wp[i].o.xv=wp[i].o.yv=0;Z_sound(snd[7],128);break;}
 121                 wp[i].s^=1;break;
 122           case BFGBALL:
 123                 if(st&Z_INWATER) {
 124                   Z_sound(snd[8],40);Z_sound(snd[13],128);
 125                   Z_water_trap(&wp[i].o);
 126                   Z_chktrap(1,1000,wp[i].own,HIT_ELECTRO);
 127                   Z_untrap(5);
 128                   wp[i].t=0;break;
 129                 }
 130                 if(wp[i].s>=2) {if(++wp[i].s>=14) wp[i].t=0; break;}
 131                 else if(st&(Z_HITWALL|Z_HITCEIL|Z_HITLAND)) {
 132                   Z_bfg9000(wp[i].o.x,wp[i].o.y,wp[i].own);
 133                   wp[i].s=2;wp[i].o.xv=wp[i].o.yv=0;Z_sound(snd[8],128);break;}
 134                 else if(Z_hit(&wp[i].o,100,wp[i].own,HIT_BFG)) {
 135                   Z_bfg9000(wp[i].o.x,wp[i].o.y,wp[i].own);
 136                   wp[i].s=2;wp[i].o.xv=wp[i].o.yv=0;Z_sound(snd[8],128);break;}
 137                 bfg_fly(wp[i].o.x,wp[i].o.y-wp[i].o.h/2,wp[i].own);
 138                 wp[i].s^=1;break;
 139           case BFGHIT:
 140                 if(++wp[i].s>=8) wp[i].t=0;
 141                 break;
 142           default: break;
 143         }
 144   }
 145 }
 146
 147 void WP_gun (int x, int y, int xd, int yd, int o, int v) {
 148   register dword d,m;
 149   int sx,sy,lx,ly;
 150   dword xe,ye,s;
 151   byte f;
 152
 153   f=BM_MONSTER|BM_WALL;
 154   if(o!=-1) f|=BM_PLR1;
 155   if(o!=-2) f|=BM_PLR2;
 156   if((xd-=x)>0) sx=1;
 157   else if(xd<0) sx=-1;
 158   else sx=0;
 159   if((yd-=y)>0) sy=1;
 160   else if(yd<0) sy=-1;
 161   else sy=0;
 162   if(!xd && !yd) return;
 163   if((xd=abs(xd)) > (yd=abs(yd))) d=xd; else d=yd;
 164   hit_xv=xd*10/d*sx;
 165   hit_yv=yd*10/d*sy;
 166   xe=ye=0;
 167   lx=x;ly=y;
 168   for(;;) {
 169         if(x<0 || x>=FLDW*8 || y<0 || y>=FLDH*8) break;
 170         if(((m=bmap[y>>5][x>>5])&f)) {
 171           if(m&BM_WALL) if(fld[y>>3][x>>3]==1 || fld[y>>3][x>>3]==2) {
 172                 for(x=lx,y=ly,xe=ye=0;fld[y>>3][x>>3]!=1 && fld[y>>3][x>>3]!=2;) {
 173                   lx=x;ly=y;
 174                   if((xe+=xd)>=d) {xe-=d;x+=sx;}
 175                   if((ye+=yd)>=d) {ye-=d;y+=sy;}
 176                 }
 177                 DOT_spark(lx,ly,sx*10,sy*10,1);
 178                 break;
 179           }
 180           if(m&(BM_MONSTER|BM_PLR1|BM_PLR2)) if(Z_gunhit(x,y,o,sx*v,sy*v)) break;
 181           lx=x;ly=y;
 182           if((xe+=(xd<<3))>=d) {
 183                 x+=xe/d*sx;xe=xe%d;
 184           }
 185           if((ye+=(yd<<3))>=d) {
 186                 y+=ye/d*sy;ye=ye%d;
 187           }
 188         }else{
 189           if(sx==0) m=0;
 190           else{m=x&31;if(sx>0) m^=31; ++m;}
 191           if(sy==0) s=0;
 192           else{s=y&31;if(sy>0) s^=31; ++s;}
 193           if((s<m && s!=0) || m==0) m=s;
 194           lx=x;ly=y;
 195                 x+=(xd*m+xe)/d*sx;xe=(xd*m+xe)%d;
 196                 y+=(yd*m+ye)/d*sy;ye=(yd*m+ye)%d;
 197         }
 198   }
 199 }
 200
 201 void WP_punch (int x, int y, int d, int own) {
 202   obj_t o;
 203
 204   o.x=x;o.y=y;o.r=12;o.h=26;
 205   o.xv=o.yv=o.vx=o.vy=0;
 206   if(Z_hit(&o,d,own,HIT_SOME)) Z_sound(snd[9],128);
 207 }
 208
 209 int WP_chainsaw (int x, int y, int d, int own) {
 210   obj_t o;
 211
 212   o.x=x;o.y=y;o.r=12;o.h=26;
 213   o.xv=o.yv=o.vx=o.vy=0;
 214   if(Z_hit(&o,d,own,HIT_SOME)) return 1;
 215   return 0;
 216 }
 217
 218 static void throw(int i,int x,int y,int xd,int yd,int r,int h,int s) {
 219   int m;
 220
 221   wp[i].o.x=x;wp[i].o.y=y+h/2;
 222   yd-=y;xd-=x;
 223   if(!(m=max(abs(xd),abs(yd)))) m=1;
 224   wp[i].o.xv=xd*s/m;wp[i].o.yv=yd*s/m;
 225   wp[i].o.r=r;wp[i].o.h=h;
 226   wp[i].o.vx=wp[i].o.vy=0;
 227 }
 228
 229 void WP_rocket (int x, int y, int xd, int yd, int o) {
 230   int i;
 231
 232   for(i=0;i<MAXWPN;++i) if(!wp[i].t) {
 233     Z_sound(snd[3],128);
 234     wp[i].t=ROCKET;wp[i].s=(xd>=x)?1:0;
 235         wp[i].own=o;
 236         throw(i,x,y,xd,yd,2,5,12);
 237         return;
 238   }
 239 }
 240
 241 void WP_revf (int x, int y, int xd, int yd, int o, int t) {
 242   int i;
 243
 244   for(i=0;i<MAXWPN;++i) if(!wp[i].t) {
 245     Z_sound(snd[3],128);
 246     wp[i].t=REVF;wp[i].s=(xd>=x)?1:0;
 247         wp[i].own=o;wp[i].target=t;
 248         throw(i,x,y,xd,yd,2,5,12);
 249         return;
 250   }
 251 }
 252
 253 void WP_plasma (int x, int y, int xd, int yd, int o) {
 254   int i;
 255
 256   for(i=0;i<MAXWPN;++i) if(!wp[i].t) {
 257     Z_sound(snd[5],64);
 258     wp[i].t=PLASMA;wp[i].s=0;
 259         wp[i].own=o;
 260         throw(i,x,y,xd,yd,2,5,16);
 261     return;
 262   }
 263 }
 264
 265 void WP_ball1 (int x, int y, int xd, int yd, int o) {
 266   int i;
 267
 268   for(i=0;i<MAXWPN;++i) if(!wp[i].t) {
 269         wp[i].t=BALL1;wp[i].s=0;
 270         wp[i].own=o;
 271         throw(i,x,y,xd,yd,2,5,16);
 272         return;
 273   }
 274 }
 275
 276 void WP_ball2 (int x, int y, int xd, int yd, int o) {
 277   int i;
 278
 279   for(i=0;i<MAXWPN;++i) if(!wp[i].t) {
 280         wp[i].t=BALL2;wp[i].s=0;
 281         wp[i].own=o;
 282         throw(i,x,y,xd,yd,2,5,16);
 283         return;
 284   }
 285 }
 286
 287 void WP_ball7 (int x, int y, int xd, int yd, int o) {
 288   int i;
 289
 290   for(i=0;i<MAXWPN;++i) if(!wp[i].t) {
 291         wp[i].t=BALL7;wp[i].s=0;
 292         wp[i].own=o;
 293         throw(i,x,y,xd,yd,2,5,16);
 294         return;
 295   }
 296 }
 297
 298 void WP_aplasma (int x, int y, int xd, int yd, int o) {
 299   int i;
 300
 301   for(i=0;i<MAXWPN;++i) if(!wp[i].t) {
 302         Z_sound(snd[5],64);
 303         wp[i].t=APLASMA;wp[i].s=0;
 304         wp[i].own=o;
 305         throw(i,x,y,xd,yd,2,5,16);
 306         return;
 307   }
 308 }
 309
 310 void WP_manfire (int x, int y, int xd, int yd, int o) {
 311   int i;
 312
 313   for(i=0;i<MAXWPN;++i) if(!wp[i].t) {
 314         Z_sound(snd[6],128);
 315         wp[i].t=MANF;wp[i].s=0;
 316         wp[i].own=o;
 317         throw(i,x,y,xd,yd,5,11,16);
 318         return;
 319   }
 320 }
 321
 322 void WP_bfgshot (int x, int y, int xd, int yd, int o) {
 323   int i;
 324
 325   for(i=0;i<MAXWPN;++i) if(!wp[i].t) {
 326     wp[i].t=BFGBALL;wp[i].s=0;
 327         wp[i].own=o;
 328         throw(i,x,y,xd,yd,5,12,16);
 329         return;
 330   }
 331 }
 332
 333 void WP_bfghit (int x, int y, int o) {
 334   int i;
 335
 336   for(i=0;i<MAXWPN;++i) if(!wp[i].t) {
 337     wp[i].t=BFGHIT;wp[i].s=0;
 338     wp[i].o.x=x;wp[i].o.y=y;
 339     wp[i].o.xv=wp[i].o.yv=0;
 340     wp[i].o.r=0;wp[i].o.h=1;
 341     wp[i].o.vx=wp[i].o.vy=0;
 342     wp[i].own=o;
 343     return;
 344   }
 345 }
 346
 347 void WP_pistol (int x,int y,int xd,int yd,int o) {
 348   Z_sound(snd[0],96);
 349   WP_gun(x,y,xd,yd,o,1);
 350   if(g_dm) {
 351     WP_gun(x,y+1,xd,yd+1,o,1);
 352     WP_gun(x,y-1,xd,yd-1,o,1);
 353   }
 354 }
 355
 356 void WP_mgun (int x, int y, int xd, int yd, int o) {
 357   Z_sound(snd[11],128);
 358   WP_gun(x,y,xd,yd,o,1);
 359 }
 360
 361 void WP_shotgun (int x, int y, int xd, int yd, int o) {
 362   int i,j;
 363
 364   Z_sound(snd[1],128);
 365   for(i=0;i<10;++i) {
 366     j=myrand(4*2+1)-4;
 367     WP_gun(x,y+j,xd,yd+j,o,i&1);
 368   }
 369 }
 370
 371 void WP_dshotgun (int x, int y, int xd, int yd, int o) {
 372   int i,j;
 373
 374   Z_sound(snd[2],128);
 375   for(i=(g_dm)?25:20;i>=0;--i) {
 376     j=myrand(10*2+1)-10;
 377     WP_gun(x,y+j,xd,yd+j,o,(i%3)?0:1);
 378   }
 379 }
 380
 381 void WP_ognemet (int x, int y, int xd, int yd, int xv, int yv, int o) {
 382   int m;
 383
 384   m=abs(xd-x);if(!m) m=abs(yd-y);
 385   SMK_flame(x,y,xv,yv,2,2,(xd-x)*3000/m,(yd-y)*3000/m,1,o);
 386 }