src/dots.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 <stdio.h>
  20 #include <stdlib.h>
  21 #include "view.h"
  22 #include "dots.h"
  23 #include "misc.h"
  24
  25 #define MAXINI 50
  26 #define MAXSR 20
  27
  28 #define BL_XV 4
  29 #define BL_YV 4
  30 #define BL_MINT 10
  31 #define BL_MAXT 14
  32
  33 #define SP_V 2
  34 #define SP_MINT 5
  35 #define SP_MAXT 7
  36
  37 typedef struct{
  38   int xv,yv;
  39   byte c,t;
  40 }init_t;
  41
  42 dot_t dot[MAXDOT];
  43
  44 static init_t bl_ini[MAXINI],sp_ini[MAXINI];
  45 static int bl_r,sp_r,sr_r,sxr[MAXSR],syr[MAXSR];
  46 static int ldot;
  47
  48 void DOT_init(void) {
  49   int i;
  50
  51   for(i=0;i<MAXDOT;++i) {dot[i].t=0;dot[i].o.r=0;dot[i].o.h=1;}
  52   ldot=0;
  53 }
  54
  55 static void incldot(void) {
  56   if(++ldot>=MAXDOT) ldot=0;
  57 }
  58
  59 void DOT_alloc(void) {
  60   int i;
  61
  62   for(i=0;i<MAXINI;++i) {
  63         bl_ini[i].xv=myrand(BL_XV*2+1)-BL_XV;
  64         bl_ini[i].yv=-myrand(BL_YV);
  65         bl_ini[i].c=0xB0+myrand(16);
  66         bl_ini[i].t=myrand(BL_MAXT-BL_MINT+1)+BL_MINT;
  67         sp_ini[i].xv=myrand(SP_V*2+1)-SP_V;
  68         sp_ini[i].yv=myrand(SP_V*2+1)-SP_V;
  69         sp_ini[i].c=0xA0+myrand(6);
  70         sp_ini[i].t=myrand(SP_MAXT-SP_MINT+1)+SP_MINT;
  71   }
  72   for(i=0;i<MAXSR;++i) {
  73         sxr[i]=myrand(2*2+1)-2;
  74         syr[i]=myrand(2*2+1)-2;
  75   }
  76   bl_r=sp_r=sr_r=0;
  77 }
  78
  79 void DOT_act(void) {
  80   int i,s,xv,yv;
  81
  82   z_dot=1;
  83   for(i=0;i<MAXDOT;++i) if(dot[i].t) {
  84     xv=dot[i].o.xv+dot[i].o.vx;
  85     yv=dot[i].o.yv+dot[i].o.vy;
  86     s=Z_moveobj(&dot[i].o);
  87     if(dot[i].t<254) --dot[i].t;
  88     if(s&(Z_HITWATER|Z_FALLOUT)) {dot[i].t=0;continue;}
  89     if(s&Z_HITLAND) {
  90       if(!dot[i].o.xv) {
  91         if(yv>2) {
  92           if(!xv) dot[i].o.vx=(rand()&1)?-1:1;
  93           else dot[i].o.vx=Z_sign(dot[i].o.vx);
  94           if(rand()%yv==0) dot[i].o.vx*=2;
  95           dot[i].o.yv=yv-2;
  96         }
  97       }
  98       dot[i].o.xv=0;
  99       if(dot[i].t>4 && dot[i].t!=255) dot[i].t=4;
 100     }
 101     if(s&Z_HITWALL) {
 102       dot[i].o.vx=Z_sign(xv)*2;
 103       dot[i].o.yv=Z_sign(dot[i].o.yv);
 104       if(dot[i].o.yv>=0) if(rand()&3) --dot[i].o.yv;
 105       if(dot[i].o.yv>=0) if(rand()&1) --dot[i].o.yv;
 106     }
 107     if(s&Z_HITCEIL) {dot[i].o.xv=0;dot[i].o.yv=(myrand(100))?-2:0;}
 108   }
 109   z_dot=0;
 110 }
 111
 112 void DOT_add(int x,int y,char xv,char yv,byte c,byte t) {
 113   int i;
 114
 115   if(!Z_canfit(x,y,0,1)) return;
 116   i=ldot;
 117   dot[i].o.x=x;dot[i].o.y=y;
 118   dot[i].o.xv=xv;dot[i].o.yv=yv;
 119   dot[i].c=c;dot[i].t=t;
 120   dot[i].o.vx=dot[i].o.vy=0;
 121   incldot();
 122 }
 123
 124 void DOT_blood(int x,int y,int xv,int yv,int n) {
 125   int i,k,dx,dy;
 126
 127   for(k=n;k;--k) {
 128     dx=x+sxr[sr_r];dy=y+syr[sr_r];
 129     if(!Z_canfit(x,y,0,1)) continue;
 130     i=ldot;
 131         dot[i].o.x=dx;dot[i].o.y=dy;
 132         dot[i].o.xv=bl_ini[bl_r].xv+Z_dec(xv,3);
 133         dot[i].o.yv=bl_ini[bl_r].yv+Z_dec(yv,3)-3;
 134         dot[i].c=bl_ini[bl_r].c;
 135         dot[i].t=255;
 136         dot[i].o.vx=dot[i].o.vy=0;
 137         if(++bl_r>=MAXINI) bl_r=0;
 138         if(++sr_r>=MAXSR) sr_r=0;
 139     incldot();
 140   }
 141 }
 142
 143 void DOT_spark(int x,int y,int xv,int yv,int n) {
 144   int i,k,dx,dy;
 145
 146   for(k=n;k;--k) {
 147     dx=x+sxr[sr_r];dy=y+syr[sr_r];
 148     if(!Z_canfit(x,y,0,1)) continue;
 149     i=ldot;
 150         dot[i].o.x=dx;dot[i].o.y=dy;
 151         dot[i].o.xv=sp_ini[sp_r].xv-xv/4;
 152         dot[i].o.yv=sp_ini[sp_r].yv-yv/4;
 153         dot[i].c=sp_ini[sp_r].c;
 154         dot[i].t=sp_ini[sp_r].t;
 155         dot[i].o.vx=dot[i].o.vy=0;
 156         if(++sp_r>=MAXINI) sp_r=0;
 157         if(++sr_r>=MAXSR) sr_r=0;
 158     incldot();
 159   }
 160 }
 161
 162 void DOT_water(int x,int y,int xv,int yv,int n,int c) {
 163   int i,k,dx,dy;
 164   static byte ct[3]={0xC0,0x70,0xB0};
 165
 166   if(c<0 || c>=3) return;
 167   c=ct[c];
 168   for(k=n;k;--k) {
 169     dx=x+sxr[sr_r];dy=y+syr[sr_r];
 170     if(!Z_canfit(x,y,0,1)) continue;
 171     i=ldot;
 172         dot[i].o.x=dx;dot[i].o.y=dy;
 173         dot[i].o.xv=bl_ini[bl_r].xv-Z_dec(xv,3);
 174         dot[i].o.yv=bl_ini[bl_r].yv-abs(yv);
 175         dot[i].c=bl_ini[bl_r].c-0xB0+c;
 176         dot[i].t=254;
 177         dot[i].o.vx=dot[i].o.vy=0;
 178         if(++bl_r>=MAXINI) bl_r=0;
 179         if(++sr_r>=MAXSR) sr_r=0;
 180     incldot();
 181   }
 182 }