AI::AI(Snake *snakes[], int player_num, Pellet *pellet, Collision_Table *collision_table, int difficulty, bool tron)
{
for (int i = 0; i < 4; i++)
{
m_snakes[i] = snakes[i];
}
assert(pellet);
m_pellet = pellet;
m_collision_table = collision_table;
m_player_num = player_num;
if (difficulty == 0)
{ //EASY
MAX_LOOK_AHEAD = EASY_MAX_LOOK_AHEAD;
MAX_OFFENSIVE_MOVES = EASY_MAX_OFFENSIVE_MOVES;
MAX_NOTICE_PELLET = EASY_MAX_NOTICE_PELLET;
CHECK_FAIL = EASY_CHECK_FAIL;
}
else if (difficulty == 1)
{ //MEDIUM
MAX_LOOK_AHEAD = MEDIUM_MAX_LOOK_AHEAD;
MAX_OFFENSIVE_MOVES = MEDIUM_MAX_OFFENSIVE_MOVES;
MAX_NOTICE_PELLET = MEDIUM_MAX_NOTICE_PELLET;
if (tron)
CHECK_FAIL = MEDIUM_CHECK_FAIL_TRON;
else
CHECK_FAIL = MEDIUM_CHECK_FAIL_SNAKE;
}
else
{ //HARD
MAX_LOOK_AHEAD = HARD_MAX_LOOK_AHEAD;
MAX_OFFENSIVE_MOVES = HARD_MAX_OFFENSIVE_MOVES;
MAX_NOTICE_PELLET = HARD_MAX_NOTICE_PELLET;
}
m_ai_difficulty = difficulty;
m_notice_pellet = MAX_NOTICE_PELLET;
m_tron = tron;
assert(snakes[m_player_num]);
m_max_x = snakes[m_player_num]->get_max_x();
m_max_y = snakes[m_player_num]->get_max_y();
m_width = snakes[m_player_num]->get_width();
if (m_tron)
m_offensive_count = rand() % MAX_OFFENSIVE_MOVES + (MAX_OFFENSIVE_MOVES/4) + 1;
else
m_offensive_count = 0;
update_coordinates();
update_direction();
}
/*
* Check for the nmea string(s) that will hold the
* information we need.
*/
void parse_code(char *buffer, uint32_t index)
{
//char *gpgll = "GPGGA";
//char *gpgsv = "GPGSV";
// All pieces of data start with GP
if (*(buffer+(index%BUFFERSIZE)) != 'G') return;
index++;
if (*(buffer+(index%BUFFERSIZE)) != 'P') return;
index++;
// Check for the GLL data
if (*(buffer+(index%BUFFERSIZE))=='G'
&& *(buffer+((index+1)%BUFFERSIZE))=='G'
&& *(buffer+((index+2)%BUFFERSIZE))=='A')
{
update_coordinates(buffer, (index+4)%BUFFERSIZE);
}
}
void AI::read_input()
{
update_coordinates();
update_direction();
if (try_move_to_pellet())
return;
if (!m_tron)
{
if (rand() % SNAKE_TURN_CHANCE == 0)
{
if (ok_to_turn())
{
go_safest_turn_direction();
return;
}
}
}
else if (m_offensive_count > 0)
{
offensive();
return;
}
defensive();
}
