KoTH round 2 bots

koth.c

/* Bot 1 (umnikos) */
#define bot query_player1_move
#define bot_name player1_name

char * bot_name = "Homing missile v2";
int bot(board(b), int player) {
    int me, them;
    if (player == 'X') {
        me = '*';
        them = '@';
    } else {
        me = '@';
        them = '*';
    }

    int myi,myj,opi,opj;
    for (int i=0; i<16; i++) {
        for (int j=0; j<32; j++) {
            if (b[i][j] == them) {
                opi = i;
                opj = j;
            }
            if (b[i][j] == me) {
                myi = i;
                myj = j;
            }
        }
    }
    int di = opi - myi;
    int dj = opj - myj;

    static int t = -1;
    t++;
    if (t < 11*3) {
        if (me == '*') {
            return "DDDDDDDDDDDRRRRRRRRRRRUUUUUUUUUUU"[t];
        } else {
            return "UUUUUUUUUUULLLLLLLLLLLDDDDDDDDDDD"[t];
        }
    }

    if (abs(di)+abs(dj) == 2) {
        return 'A';
    }
    if (abs(di) > abs(dj)) {
        if (di > 0) {
            return 'D';
        } else {
            return 'U';
        }
    } else {
        if (dj > 0) {
            return 'R';
        } else {
            return 'L';
        }
    }
}

#undef bot
#undef bot_name
/* Bot 2 (IFcoltransG) */
#define bot query_player2_move
#define bot_name player2_name

#define i_m (player == 'X' ? '*' : '@')
#define u_r (player == 'X' ? '@' : '*')
#define dist(a, b) (abs(a) + abs(b))
#define dir(a, b) (abs(a) <= abs(b) ? "UD"[b > 0] : "LR"[a > 0])
int bot(int board[16][32], char player) {
	int x, y;
	int z, t;
	int rx, ry;
	for (int i = 16; i-->0; ) {
		for (int j = 32; j-->0;) {
			if (board[i][j] == i_m) {
				x = j; y = i;
			}
			if (board[i][j] == u_r) {
				z = j; t = i;
			}
		}
	}
	// vector to the mirror of wherever the opponent is
	rx = (32 - z - 1) - x;
	ry = (16 - t - 1) - y;
	if (dist(rx, ry) == 0) {
		// right where we want to be
		return 'a';
	}
	return dir(rx, ry);
}
char * bot_name = "a";
#undef i_m
#undef u_r
#undef dist
#undef dir

#undef bot
#undef bot_name