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Length: 6347 (0x18cb)
Types: TextFile
Names: »fall.c«
└─⟦b20c6495f⟧ Bits:30007238 EUUGD18: Wien-båndet, efterår 1987
└─⟦this⟧ »EUUGD18/General/Wanderer/fall.c«
#include "wand_head.h"
extern void draw_symbol();
extern int debug_disp;
extern char screen[NOOFROWS][ROWLEN+1];
int check(mx,my,x,y,dx,dy,sx,sy,howdead)
/* check for any falling caused by something moving out of x,y along
vector dx,dy. All the others are constant and should really have
been global... */
int x,y,sx,sy,dx,dy, *mx, *my;
char howdead[25];
{
int ret=0;
ret+=fall(mx,my,x,y,sx,sy,howdead);
ret+=fall(mx,my,x-dx,y-dy,sx,sy,howdead);
ret+=fall(mx,my,x-dy,y-dx,sx,sy,howdead);
ret+=fall(mx,my,x+dy,y+dx,sx,sy,howdead);
ret+=fall(mx,my,x-dx-dy,y-dy-dx,sx,sy,howdead);
ret+=fall(mx,my,x-dx+dy,y-dy+dx,sx,sy,howdead);
return ret;
}
int fall(mx,my,x,y,sx,sy,howdead) /* recursive function for falling */
/* boulders and arrows */
int x,y,sx,sy, *mx, *my;
char howdead[25];
{
int nx = x,nxu = x,nyl = y,nyr = y,retval = 0;
if ((y>(NOOFROWS-1))||(y<0)||(x<0)||(x>(ROWLEN-1)))
return(0);
if((screen[y][x] != 'O') && (screen[y][x] != ' ') && (screen[y][x] != 'M') &&
(screen[y][x] !='\\') && (screen[y][x] != '/') && (screen[y][x] != '@') &&
(screen[y][x] != '^'))
return(0);
if(screen[y][x] == 'O')
{
if((screen[y][x-1] == ' ') && (screen[y-1][x-1] == ' '))
nx--;
else
{
if((screen[y][x+1] == ' ') && (screen[y-1][x+1] == ' '))
nx++;
else
nx = -1;
}
if((screen[y][x-1] == ' ') && (screen[y+1][x-1] == ' '))
nxu--;
else
{
if((screen[y][x+1] == ' ') && (screen[y+1][x+1] == ' '))
nxu++;
else
nxu = -1;
}
if((screen[y-1][x] == ' ') && (screen[y-1][x+1] == ' '))
nyr--;
else
{
if((screen[y+1][x] == ' ') && (screen[y+1][x+1] == ' '))
nyr++;
else
nyr = -1;
}
if((screen[y-1][x] == ' ') && (screen[y-1][x-1] == ' '))
nyl--;
else
{
if((screen[y+1][x] == ' ') && (screen[y+1][x-1] == ' '))
nyl++;
else
nyl = -1;
}
}
if(screen[y][x] == '\\')
{
if(screen[y-1][++nx] != ' ')
nx = -1;
if(screen[y+1][--nxu] != ' ')
nxu = -1;
if(screen[--nyr][x+1] != ' ')
nyr = -1;
if(screen[++nyl][x-1] != ' ')
nyl = -1;
}
if(screen[y][x] == '/')
{
if(screen[y-1][--nx] != ' ')
nx = -1;
if(screen[y+1][++nxu] != ' ')
nxu = -1;
if(screen[++nyr][x+1] != ' ')
nyr = -1;
if(screen[--nyl][x-1] != ' ')
nyl = -1;
}
if((screen[y][nx] != ' ') && (screen[y][nx] != 'M'))
nx = -1;
if((screen[y-1][x] == 'O') && (nx >= 0) && (y > 0) &&
(screen[y][nx] != '^')) /* boulder falls ? */
{
screen[y-1][x] = ' ';
if(screen[y][nx] == '@')
{
strcpy(howdead,"a falling boulder");
retval=1;
}
if(screen[y][nx] == 'M')
{
*mx = *my = -2;
screen[y][nx] = ' ';
}
screen[y][nx] = 'O';
if(!debug_disp)
{
if((y<(sy+5)) && (y>(sy-3)) && (x>(sx-6)) && (x<(sx+6)))
draw_symbol((x-sx+5)*3,(y-sy+2)*2,' ');
if((y<(sy+4)) && (y>(sy-4)) && (nx>(sx-6)) && (nx<(sx+6)))
draw_symbol((nx-sx+5)*3,(y-sy+3)*2,'O');
}
else
{
move(y,x+1);
addch(' ');;
move(y+1,nx+1);
addch('O');
}
refresh();
retval+=fall(mx,my,nx ,y+1,sx,sy,howdead);
retval+=check(mx,my,x,y-1,0,1,sx,sy,howdead);
if(screen[y+1][nx] == '@')
{
strcpy(howdead,"a falling boulder");
return(1);
}
if(screen[y+1][nx] == 'M')
{
*mx = *my = -2;
screen[y+1][nx] = ' ';
}
}
if((screen[nyr][x] != '^')&&(screen[nyr][x] != ' ')&&(screen[nyr][x] != 'M'))
nyr = -1;
if((screen[y][x+1] == '<')&&(nyr>=0)&&(x+1<ROWLEN)) /* arrow moves ( < ) ? */
{
screen[y][x+1] = ' ';
if(screen[nyr][x] == '@')
{
strcpy(howdead,"a speeding arrow");
retval = 1;
}
if(screen[nyr][x] == 'M')
{
*mx = *my = -2;
screen[nyr][x] = ' ';
}
screen[nyr][x] = '<';
if(!debug_disp)
{
if((y<(sy+4)) && (y>(sy-4)) && (x<(sx+5)) && (x>(sx-7)))
draw_symbol((x-sx+6)*3,(y-sy+3)*2,' ');
if((nyr<(sy+4)) && (nyr>(sy-4)) && (x<(sx+6)) && (x>(sx-6)))
draw_symbol((x-sx+5)*3,(nyr-sy+3)*2,'<');
}
else
{
move(y+1,x+2);
addch(' ');
move(nyr+1,x+1);
addch('<');
}
refresh();
retval+=fall(mx,my,x-1,nyr,sx,sy,howdead);
retval+=check(mx,my,x+1,y,-1,0,sx,sy,howdead);
if(screen[nyr][x-1] == '@')
{
strcpy(howdead,"a speeding arrow");
return(1);
}
if(screen[nyr][x-1] == 'M')
{
*mx = *my = -2;
screen[nyr][x-1] = ' ';
}
}
if((screen[nyl][x] != ' ')&&(screen[nyl][x] != '^')&&(screen[nyl][x] != 'M'))
nyl = -1;
if((screen[y][x-1] == '>')&&(nyl>=0)&&(x>0)) /* arrow moves ( > ) ? */
{
screen[y][x-1] = ' ';
if(screen[nyl][x] == '@')
{
strcpy(howdead,"a speeding arrow");
retval = 1;
}
if(screen[nyl][x] == 'M')
{
*mx = *my = -2;
screen[nyl][x] = ' ';
}
screen[nyl][x] = '>';
if(!debug_disp)
{
if((y<(sy+4)) && (y>(sy-4)) && (x<(sx+7)) && (x>(sx-5)))
draw_symbol((x-sx+4)*3,(y-sy+3)*2,' ');
if((nyl<(sy+4)) && (nyl>(sy-4)) && (x<(sx+6)) && (x>(sx-6)))
draw_symbol((x-sx+5)*3,(nyl-sy+3)*2,'>');
}
else
{
move(y+1,x);
addch(' ');
move(nyl+1,x+1);
addch('>');
}
refresh();
retval+=fall(mx,my,x+1,nyl,sx,sy,howdead);
retval+=check(mx,my,x-1,y,1,0,sx,sy,howdead);
if(screen[nyl][x+1] == '@')
{
strcpy(howdead,"a speeding arrow");
return(1);
}
if(screen[nyl][x+1] == 'M')
{
*mx = *my = -2;
screen[nyl][x+1] = ' ';
}
}
if(screen[y][nxu] != ' ')
nxu = -1;
if((screen[y+1][x] == '^') && (nxu >= 0) && (y < NOOFROWS) &&
(screen[y][x] != '^')) /* balloon rises? */
{
screen[y+1][x] = ' ';
screen[y][nxu] = '^';
if(!debug_disp)
{
if((y<(sy+3)) && (y>(sy-5)) && (x>(sx-6)) && (x<(sx+6)))
draw_symbol((x-sx+5)*3,(y-sy+4)*2,' ');
if((y<(sy+4)) && (y>(sy-4)) && (nxu>(sx-6)) && (nxu<(sx+6)))
draw_symbol((nxu-sx+5)*3,(y-sy+3)*2,'^');
}
else
{
move(y+2,x+1);
addch(' ');
move(y+1,nxu+1);
addch('^');
}
refresh();
retval+=fall(mx,my,nxu ,y-1,sx,sy,howdead);
retval+=check(mx,my,x,y+1,0,-1,sx,sy,howdead);
}
if(retval>0)
return(1);
return(0);
}