initial import of 386bsd-0.1 sources

[bsdgames-darwin.git] / larn / movem.c

/*
 *      movem.c (move monster)          Larn is copyrighted 1986 by Noah Morgan.
 *
 *      Here are the functions in this file:
 *
 *      movemonst()             Routine to move the monsters toward the player
 *      movemt(x,y)             Function to move a monster at (x,y) -- must determine where
 *      mmove(x,y,xd,yd)        Function to actually perform the monster movement
 *      movsphere()             Function to look for and move spheres of annihilation
 */
#include "header.h"

/*
 *      movemonst()             Routine to move the monsters toward the player
 *
 *      This routine has the responsibility to determine which monsters are to
 *      move, and call movemt() to do the move.
 *      Returns no value.
 */
static short w1[9],w1x[9],w1y[9];
static int tmp1,tmp2,tmp3,tmp4,distance;
movemonst()
        {
        register int i,j;
        if (c[TIMESTOP]) return;        /* no action if time is stopped */
        if (c[HASTESELF])  if ((c[HASTESELF]&1)==0)  return;
        if (spheres) movsphere();       /* move the spheres of annihilation if any */
        if (c[HOLDMONST])  return;      /* no action if monsters are held */

        if (c[AGGRAVATE])       /* determine window of monsters to move */
          {
          tmp1=playery-5; tmp2=playery+6; tmp3=playerx-10; tmp4=playerx+11;
          distance=40; /* depth of intelligent monster movement */
          }
        else
          {
          tmp1=playery-3; tmp2=playery+4; tmp3=playerx-5; tmp4=playerx+6;
          distance=17; /* depth of intelligent monster movement */
          }

        if (level == 0) /* if on outside level monsters can move in perimeter */
                {
                if (tmp1 < 0) tmp1=0;            if (tmp2 > MAXY) tmp2=MAXY;
                if (tmp3 < 0) tmp3=0;            if (tmp4 > MAXX) tmp4=MAXX;
                }
        else /* if in a dungeon monsters can't be on the perimeter (wall there) */
                {
                if (tmp1 < 1) tmp1=1;            if (tmp2 > MAXY-1) tmp2=MAXY-1;
                if (tmp3 < 1) tmp3=1;            if (tmp4 > MAXX-1) tmp4=MAXX-1;
                }

        for (j=tmp1; j<tmp2; j++) /* now reset monster moved flags */
                for (i=tmp3; i<tmp4; i++)
                        moved[i][j] = 0;
    moved[lasthx][lasthy]=0;

        if (c[AGGRAVATE] || !c[STEALTH]) /* who gets moved? split for efficiency */
          {
          for (j=tmp1; j<tmp2; j++) /* look thru all locations in window */
            for (i=tmp3; i<tmp4; i++)
                  if (mitem[i][j])      /* if there is a monster to move */
                    if (moved[i][j]==0) /* if it has not already been moved */
                          movemt(i,j);  /* go and move the monster */
          }
        else /* not aggravated and not stealth */
          {
          for (j=tmp1; j<tmp2; j++) /* look thru all locations in window */
            for (i=tmp3; i<tmp4; i++)
                  if (mitem[i][j])      /* if there is a monster to move */
                    if (moved[i][j]==0) /* if it has not already been moved */
                          if (stealth[i][j])    /* if it is asleep due to stealth */
                            movemt(i,j);        /* go and move the monster */
          }

        if (mitem[lasthx][lasthy]) /* now move monster last hit by player if not already moved */
                {
            if (moved[lasthx][lasthy]==0)       /* if it has not already been moved */
                        {
                        movemt(lasthx,lasthy);
                        lasthx = w1x[0];   lasthy = w1y[0];
                        }
                }
        }

/*
 *      movemt(x,y)             Function to move a monster at (x,y) -- must determine where
 *              int x,y;
 *
 *      This routine is responsible for determining where one monster at (x,y) will
 *      move to.  Enter with the monsters coordinates in (x,y).
 *      Returns no value.
 */
static int tmpitem,xl,xh,yl,yh;
movemt(i,j)
        int i,j;
        {
        register int k,m,z,tmp,xtmp,ytmp,monst;
        switch(monst=mitem[i][j])  /* for half speed monsters */
                {
                case TROGLODYTE:  case HOBGOBLIN:  case METAMORPH:  case XVART:
                case INVISIBLESTALKER:  case ICELIZARD: if ((gtime & 1) == 1) return;
                };

        if (c[SCAREMONST]) /* choose destination randomly if scared */
                {
                if ((xl = i+rnd(3)-2) < 0) xl=0;  if (xl >= MAXX) xl=MAXX-1;
                if ((yl = j+rnd(3)-2) < 0) yl=0;  if (yl >= MAXY) yl=MAXY-1;
                if ((tmp=item[xl][yl]) != OWALL)
                  if (mitem[xl][yl] == 0)
                        if ((mitem[i][j] != VAMPIRE) || (tmpitem != OMIRROR))
                          if (tmp != OCLOSEDDOOR)               mmove(i,j,xl,yl);
                return;
                }

        if (monster[monst].intelligence > 10-c[HARDGAME]) /* if smart monster */
/* intelligent movement here -- first setup screen array */
          {
          xl=tmp3-2; yl=tmp1-2; xh=tmp4+2;  yh=tmp2+2;
          vxy(&xl,&yl);  vxy(&xh,&yh);
          for (k=yl; k<yh; k++)
            for (m=xl; m<xh; m++)
                  {
                  switch(item[m][k])
                        {
                        case OWALL: case OPIT: case OTRAPARROW: case ODARTRAP:
                        case OCLOSEDDOOR: case OTRAPDOOR: case OTELEPORTER:
                                smm:      screen[m][k]=127;  break;
                        case OMIRROR: if (mitem[m][k]==VAMPIRE) goto smm;
                        default:  screen[m][k]=  0;  break;
                        };
                  }
          screen[playerx][playery]=1;

/* now perform proximity ripple from playerx,playery to monster */
          xl=tmp3-1; yl=tmp1-1; xh=tmp4+1;  yh=tmp2+1;
          vxy(&xl,&yl);  vxy(&xh,&yh);
          for (tmp=1; tmp<distance; tmp++)      /* only up to 20 squares away */
            for (k=yl; k<yh; k++)
              for (m=xl; m<xh; m++)
                    if (screen[m][k]==tmp) /* if find proximity n advance it */
                          for (z=1; z<9; z++) /* go around in a circle */
                            {
                            if (screen[xtmp=m+diroffx[z]][ytmp=k+diroffy[z]]==0)
                                  screen[xtmp][ytmp]=tmp+1;
                            if (xtmp==i && ytmp==j) goto out;
                            }

out:  if (tmp<distance) /* did find connectivity */
                /* now select lowest value around playerx,playery */
                for (z=1; z<9; z++) /* go around in a circle */
                  if (screen[xl=i+diroffx[z]][yl=j+diroffy[z]]==tmp)
                        if (!mitem[xl][yl]) { mmove(i,j,w1x[0]=xl,w1y[0]=yl); return; }
          }

        /* dumb monsters move here */
        xl=i-1;  yl=j-1;  xh=i+2;  yh=j+2;
        if (i<playerx) xl++; else if (i>playerx) --xh;
        if (j<playery) yl++; else if (j>playery) --yh;
        for (k=0; k<9; k++) w1[k] = 10000;

        for (k=xl; k<xh; k++)
                for (m=yl; m<yh; m++) /* for each square compute distance to player */
                        {
                        tmp = k-i+4+3*(m-j);
                        tmpitem = item[k][m];
                        if (tmpitem!=OWALL || (k==playerx && m==playery))
                         if (mitem[k][m]==0)
                          if ((mitem[i][j] != VAMPIRE) || (tmpitem != OMIRROR))
                                 if (tmpitem!=OCLOSEDDOOR)
                                        {
                                        w1[tmp] = (playerx-k)*(playerx-k)+(playery-m)*(playery-m);
                                        w1x[tmp] = k;  w1y[tmp] = m;
                                        }
                        }

        tmp = 0;
        for (k=1; k<9; k++)  if (w1[tmp] > w1[k])  tmp=k;

        if (w1[tmp] < 10000)
                if ((i!=w1x[tmp]) || (j!=w1y[tmp]))
                        mmove(i,j,w1x[tmp],w1y[tmp]);
        }

/*
 *      mmove(x,y,xd,yd)        Function to actually perform the monster movement
 *              int x,y,xd,yd;
 *
 *      Enter with the from coordinates in (x,y) and the destination coordinates
 *      in (xd,yd).
 */
mmove(aa,bb,cc,dd)
        int aa,bb,cc,dd;
        {
        register int tmp,i,flag;
        char *who,*p;
        flag=0; /* set to 1 if monster hit by arrow trap */
        if ((cc==playerx) && (dd==playery))
                {
                hitplayer(aa,bb);  moved[aa][bb] = 1;  return;
                }
        i=item[cc][dd];
        if ((i==OPIT) || (i==OTRAPDOOR))
          switch(mitem[aa][bb])
                {
                case SPIRITNAGA:        case PLATINUMDRAGON:    case WRAITH:
                case VAMPIRE:           case SILVERDRAGON:              case POLTERGEIST:
                case DEMONLORD:         case DEMONLORD+1:               case DEMONLORD+2:
                case DEMONLORD+3:       case DEMONLORD+4:               case DEMONLORD+5:
                case DEMONLORD+6:       case DEMONPRINCE:       break;

                default:        mitem[aa][bb]=0; /* fell in a pit or trapdoor */
                };
        tmp = mitem[cc][dd] = mitem[aa][bb];
        if (i==OANNIHILATION)
                {
                if (tmp>=DEMONLORD+3) /* demons dispel spheres */
                        {
                        cursors();
                        lprintf("\nThe %s dispels the sphere!",monster[tmp].name);
                        rmsphere(cc,dd);        /* delete the sphere */
                        }
                else i=tmp=mitem[cc][dd]=0;
                }
        stealth[cc][dd]=1;
        if ((hitp[cc][dd] = hitp[aa][bb]) < 0) hitp[cc][dd]=1;
        mitem[aa][bb] = 0;                              moved[cc][dd] = 1;
        if (tmp == LEPRECHAUN)
                switch(i)
                        {
                        case OGOLDPILE:  case OMAXGOLD:  case OKGOLD:  case ODGOLD:
                        case ODIAMOND:   case ORUBY:     case OEMERALD: case OSAPPHIRE:
                                        item[cc][dd] = 0; /* leprechaun takes gold */
                        };

        if (tmp == TROLL)  /* if a troll regenerate him */
                if ((gtime & 1) == 0)
                        if (monster[tmp].hitpoints > hitp[cc][dd])  hitp[cc][dd]++;

        if (i==OTRAPARROW)      /* arrow hits monster */
                { who = "An arrow";  if ((hitp[cc][dd] -= rnd(10)+level) <= 0)
                        { mitem[cc][dd]=0;  flag=2; } else flag=1; }
        if (i==ODARTRAP)        /* dart hits monster */
                { who = "A dart";  if ((hitp[cc][dd] -= rnd(6)) <= 0)
                        { mitem[cc][dd]=0;  flag=2; } else flag=1; }
        if (i==OTELEPORTER)     /* monster hits teleport trap */
                { flag=3; fillmonst(mitem[cc][dd]);  mitem[cc][dd]=0; }
        if (c[BLINDCOUNT]) return;      /* if blind don't show where monsters are       */
        if (know[cc][dd] & 1) 
                {
                p=0;
                if (flag) cursors();
                switch(flag)
                  {
                  case 1: p="\n%s hits the %s";  break;
                  case 2: p="\n%s hits and kills the %s";  break;
                  case 3: p="\nThe %s%s gets teleported"; who="";  break;
                  };
                if (p) { lprintf(p,who,monster[tmp].name); beep(); }
                }
/*      if (yrepcount>1) { know[aa][bb] &= 2;  know[cc][dd] &= 2; return; } */
        if (know[aa][bb] & 1)   show1cell(aa,bb);
        if (know[cc][dd] & 1)   show1cell(cc,dd);
        }

/*
 *      movsphere()     Function to look for and move spheres of annihilation
 *
 *      This function works on the sphere linked list, first duplicating the list
 *      (the act of moving changes the list), then processing each sphere in order
 *      to move it.  They eat anything in their way, including stairs, volcanic
 *      shafts, potions, etc, except for upper level demons, who can dispel
 *      spheres.
 *      No value is returned.
 */
#define SPHMAX 20       /* maximum number of spheres movsphere can handle */
movsphere()
        {
        register int x,y,dir,len;
        register struct sphere *sp,*sp2;
        struct sphere sph[SPHMAX];

        /* first duplicate sphere list */
        for (sp=0,x=0,sp2=spheres; sp2; sp2=sp2->p)     /* look through sphere list */
          if (sp2->lev == level)        /* only if this level */
                {
                sph[x] = *sp2;  sph[x++].p = 0;  /* copy the struct */
                if (x>1)  sph[x-2].p = &sph[x-1]; /* link pointers */
                }
        if (x) sp= sph; /* if any spheres, point to them */
                else return;    /* no spheres */

        for (sp=sph; sp; sp=sp->p)      /* look through sphere list */
                {
                x = sp->x;        y = sp->y;
                if (item[x][y]!=OANNIHILATION) continue;        /* not really there */
                if (--(sp->lifetime) < 0)       /* has sphere run out of gas? */
                        {
                        rmsphere(x,y); /* delete sphere */
                        continue;
                        }
                switch(rnd((int)max(7,c[INTELLIGENCE]>>1))) /* time to move the sphere */
                        {
                        case 1:
                        case 2:         /* change direction to a random one */
                                                sp->dir = rnd(8);
                        default:        /* move in normal direction */
                                                dir = sp->dir;          len = sp->lifetime;
                                                rmsphere(x,y);
                                                newsphere(x+diroffx[dir],y+diroffy[dir],dir,len);
                        };
                }
        }