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/* tron.c - xtron v1.1 player routines
*
* Copyright (C) 1995 Rhett D. Jacobs <rhett@hotel.canberra.edu.au>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 1, or (at your option)
* any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*
* Last Modified: 16/4/95
*/
#include "xtron.h"
struct Player p[2];
struct Board b;
void plr_setup(void)
{
int i;
/* set starting directions and player types, plus scores */
p[0].plr_dir = left;
p[1].plr_dir = right;
for (i=0; i < 2; i++) {
p[i].plr_type = computer;
p[i].alive = 1;
p[i].score = 0;
p[i].co_ords[1] = MAXVERT/2;
}
p[0].co_ords[0] = (MAXHORZ/2)-3;
p[1].co_ords[0] = (MAXHORZ/2)+3;
}
int plr_checkmove(int p_num, int new_val, int axis_type, enum directions dir)
{
enum directions temp = left;
switch (p[p_num].plr_dir) {
case left:
temp = right; break;
case right:
temp = left; break;
case up:
temp = down; break;
case down:
temp = up; break;
}
/* if move is in the opposite direction - invalid */
if (dir == temp)
return(0);
return(1);
}
void plr_turn(int p_num, enum directions dir)
{
switch(dir) {
case left:
if (plr_checkmove(p_num, (p[p_num].co_ords[0])-1, 0, dir))
p[p_num].plr_dir = left;
break;
case right:
if (plr_checkmove(p_num, (p[p_num].co_ords[0])+1, 0, dir))
p[p_num].plr_dir = right;
break;
case up:
if (plr_checkmove(p_num, (p[p_num].co_ords[1])-1, 1, dir))
p[p_num].plr_dir = up;
break;
case down:
if (plr_checkmove(p_num, (p[p_num].co_ords[1])+1, 1, dir))
p[p_num].plr_dir = down;
break;
}
}
void brd_setup(void)
{
int i,j;
/* clear board */
for(i=0; i< DIMS; i++)
for(j=0;j< DIMS;j++)
b.contents[i][j] = 0;
/* inital player pieces */
brd_newcontents((MAXHORZ/2)-3, MAXVERT/2, 1);
brd_newcontents((MAXHORZ/2)+3, MAXVERT/2, 2);
}
int brd_newcontents(int x, int y, int what)
{
/* 0 - Empty, 1 - Player 1, 2 - Player 2 */
if (x > DIMS || x < 0)
return(0);
if (y > DIMS || y < 0)
return(0);
if (b.contents[x][y] != 0)
return(0);
else {
b.contents[x][y] = what;
return(1);
}
}
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