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fall.c
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fall.c
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/* File fall.c */
#include "fall.h"
#include "wand_head.h"
#include "display.h"
#include "icon.h"
#include <curses.h>
#include <string.h>
extern int debug_disp;
extern char screen[NOOFROWS][ROWLEN + 1];
int moving = 0; /* so that bombs explode only if something *hits* them */
/*****************************************************
* Function check *
******************************************************/
/* 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 check(int *mx, int *my, int x, int y, int dx, int dy, int sx, int sy,
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;
}
/*****************************************************
* Function fall *
******************************************************/
/* recursive function for falling *
* boulders and arrows *
***********************************/
int fall(int *mx, int *my, int x, int y, int sx, int sy, char howdead[25])
{
int nx = x, nxu = x, nyl = y, nyr = y, ny = y, retval = 0;
if ((y > (NOOFROWS - 1)) || (y < 0) || (x < 0) || (x > (ROWLEN - 1)))
return (0);
if (screen[y][x] == '~')
{
if (screen[y - 1][x] == ' ')
fall(mx, my, x, y - 1, sx, sy, howdead);
if (screen[y + 1][x] == ' ')
fall(mx, my, x, y + 1, sx, sy, howdead);
if (screen[y][x - 1] == ' ')
fall(mx, my, x - 1, y, sx, sy, howdead);
if (screen[y][x + 1] == ' ')
fall(mx, my, x + 1, y, sx, sy, howdead);
}
if ((screen[y][x] != 'O') && (screen[y][x] != ' ') && (screen[y][x] != 'M')
&& (screen[y][x] != '\\') && (screen[y][x] != '/')
&& (screen[y][x] != '@') && (screen[y][x] != '^')
&& (screen[y][x] != 'B'))
return (0);
if ((screen[y][x] == 'B') && (moving == 0))
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')
&& (screen[y][nx] != 'B'))
nx = -1;
if ((screen[y - 1][x] == 'O') && (nx >= 0) && (y > 0)) /* boulder falls ? */
{
moving = 1;
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] = ' ';
}
if (screen[y][nx] == 'B')
{
retval = bang(nx, y, mx, my, sx, sy, howdead);
return retval;
}
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);
moving = 0;
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') && (screen[nyr][x] != 'B'))
nyr = -1;
if ((screen[y][x + 1] == '<') && (nyr >= 0) && (x + 1 < ROWLEN)) /* arrow moves ( < ) ? */
{
moving = 1;
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] = ' ';
}
if (screen[nyr][x] == 'B')
{
retval = bang(x, nyr, mx, my, sx, sy, howdead);
return retval;
}
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);
moving = 0;
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') && (screen[nyl][x] != 'B'))
nyl = -1;
if ((screen[y][x - 1] == '>') && (nyl >= 0) && (x > 0)) /* arrow moves ( > ) ? */
{
moving = 1;
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] = ' ';
}
if (screen[nyr][x] == 'B')
{
retval = bang(x, nyr, mx, my, sx, sy, howdead);
return retval;
}
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);
moving = 0;
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] != '^') && (screen[y][x] != 'B')) /* 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);
}
nx = x;
ny = y;
if (screen[y][x] == ' ')
{ /* thingy moves? */
if ((y > 1) && (screen[y - 1][x] == '~') && (screen[y - 2][x] == 'O'))
/* boulder pushes */
ny--;
else
{
if ((x > 1) && (screen[y][x - 1] == '~')
&& (screen[y][x - 2] == '>'))
/* arrow pushes */
nx--;
else
{
if ((x < (ROWLEN - 1)) && (screen[y][x + 1] == '~')
&& (screen[y][x + 2] == '<'))
/* arrow pushes */
nx++;
else
{
if ((y < (NOOFROWS - 1)) && (screen[y + 1][x] == '~')
&& (screen[y + 2][x] == '^'))
/* balloon pushes */
ny++;
}
}
}
if ((x != nx) || (y != ny))
{
screen[y][x] = '~';
screen[ny][nx] = screen[2 * ny - y][2 * nx - x];
screen[2 * ny - y][2 * nx - x] = ' ';
if (!debug_disp)
{
if (((2 * ny - y) < (sy + 4)) && ((2 * ny - y) > (sy - 4))
&& ((2 * nx - x) > (sx - 6)) && ((2 * nx - x) < (sx + 6)))
draw_symbol((2 * nx - x - sx + 5) * 3,
(2 * ny - y - sy + 3) * 2, ' ');
if ((y < (sy + 4)) && (y > (sy - 4)) && (x > (sx - 6))
&& (x < (sx + 6)))
draw_symbol((x - sx + 5) * 3, (y - sy + 3) * 2, '~');
if ((ny < (sy + 4)) && (ny > (sy - 4)) && (nx > (sx - 6))
&& (nx < (sx + 6)))
draw_symbol((nx - sx + 5) * 3, (ny - sy + 3) * 2,
screen[ny][nx]);
}
else
{
move(ny * 2 - y + 1, nx * 2 - x + 1);
addch(' ');
move(ny + 1, nx + 1);
addch(screen[ny][nx]);
move(y + 1, x + 1);
addch('~');
}
refresh();
retval += fall(mx, my, 2 * x - nx, 2 * y - ny, sx, sy, howdead);
retval +=
check(mx, my, 2 * nx - x, 2 * ny - y, nx - x, ny - y, sx, sy,
howdead);
}
}
if (retval > 0)
return (1);
return (0);
}
/**********************************************
* function bang *
***********************************************/
int bang(int x, int y, int *mx, int *my, int sx, int sy, char *howdead) /* explosion centre x,y */
{
int retval = 0;
int ba, bb; /* abbrevs for 'bang index a' and 'bang index b' :-) */
int gottim = 0;
screen[y][x] = ' ';
/* fill with bangs */
for (ba = -1; ba < 2; ba++)
for (bb = -1; bb < 2; bb++)
{
if (screen[y + ba][x + bb] == '#')
continue; /* rock indestructable */
if (screen[y + ba][x + bb] == '@')
gottim = 1;
if (screen[y + ba][x + bb] == 'M')
*mx = *my = -2; /* kill monster */
if (screen[y + ba][x + bb] == 'B')
gottim += bang(x + bb, y + ba, mx, my, sx, sy, howdead);
screen[y + ba][x + bb] = ' ';
if (!debug_disp)
{
if (((y + ba) < (sy + 4)) && ((y + ba) > (sy - 4))
&& ((x + bb) > (sx - 6)) && ((x + bb) < (sx + 6))
&& (y + ba >= 0) && (x + bb >= 0) && ((x + bb) < ROWLEN)
&& ((y + ba) < NOOFROWS))
draw_symbol((x + bb - sx + 5) * 3, (y + ba - sy + 3) * 2,
'%');
}
else
{
if (((x + bb) > -1) && ((y + ba) > -1) && ((x + bb) < ROWLEN)
&& ((y + ba) < NOOFROWS))
{
move(y + ba + 1, x + bb + 1);
addch('%');
}
}
}
refresh();
if (gottim)
{
strcpy(howdead, "an exploding bomb");
return 1;
}
/* erase it all */
for (ba = -1; ba < 2; ba++)
for (bb = -1; bb < 2; bb++)
{
if (screen[y + ba][x + bb] == '#')
continue;
if (!debug_disp)
{
if (((y + ba) < (sy + 4)) && ((y + ba) > (sy - 4))
&& ((x + bb) > (sx - 6)) && ((x + bb) < (sx + 6))
&& (y + ba > -1) && (x + bb > -1) && ((x + bb) < ROWLEN)
&& ((y + ba) < NOOFROWS))
draw_symbol((x + bb - sx + 5) * 3, (y + ba - sy + 3) * 2,
' ');
}
else
{
if (((x + bb) > -1) && ((y + ba) > -1) && ((x + bb) < ROWLEN)
&& ((y + ba) < NOOFROWS))
{
move(y + ba + 1, x + bb + 1);
addch(' ');
}
}
}
/* make all the necessary falling */
retval = check(mx, my, x - 1, y - 1, 1, 0, sx, sy, howdead);
retval += check(mx, my, x - 1, y + 1, 0, -1, sx, sy, howdead);
retval += check(mx, my, x + 1, y - 1, 0, 1, sx, sy, howdead);
retval += check(mx, my, x + 1, y + 1, -1, 0, sx, sy, howdead);
return retval;
}