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#include "pac.h"
#include "ncurses.h"
#include "queue.h"
void initialize_pac(struct pacman *pac)
{
pac->lives = max_live;
pac->score = 0;
pac->position.y = pac_y;
pac->position.x = pac_x;
pac->direction = none;
pac->is_energizer_eaten = 0;
}
static enum movement_direction get_matching_for_directions(game_space field,
struct pacman *pac,
enum movement_direction direction)
{
struct free_directions free_paths =
find_free_directions(field, pac->position.x, pac->position.y);
switch(direction) {
case left:
return free_paths.left ? left : none;
case right:
return free_paths.right ? right : none;
case up:
return free_paths.up ? up : none;
case down:
return free_paths.down ? down : none;
default:
return none;
}
}
void check_remaining_direction(game_space field, struct pacman *pac,
enum movement_direction *stored_direction)
{
enum movement_direction matching_result;
if(*stored_direction == none)
pac->direction =
get_matching_for_directions(field, pac, pac->direction);
else {
matching_result =
get_matching_for_directions(field, pac, *stored_direction);
if(matching_result != none)
pac->direction = matching_result;
else
pac->direction =
get_matching_for_directions(field, pac, pac->direction);
*stored_direction = none;
}
}
static void check_remaining_direction_after_pressed_key(game_space field,
struct pacman *pac)
{
pac->direction =
get_matching_for_directions(field, pac, pac->direction);
}
void change_pac_direction(game_space field, struct pacman *pac, int key,
enum movement_direction *stored_direction)
{
enum state { no, yes } is_changed_direction;
is_changed_direction = no;
struct free_directions path = find_free_directions(field, pac->position.x,
pac->position.y);
switch(key) {
case KEY_LEFT:
if(path.left) {
pac->direction = left;
is_changed_direction = yes;
} else
*stored_direction = left;
break;
case KEY_RIGHT:
if(path.right) {
pac->direction = right;
is_changed_direction = yes;
} else
*stored_direction = right;
break;
case KEY_UP:
if(path.up) {
pac->direction = up;
is_changed_direction = yes;
} else
*stored_direction = up;
break;
case KEY_DOWN:
if(path.down) {
pac->direction = down;
is_changed_direction = yes;
} else
*stored_direction = down;
break;
}
if(is_changed_direction == no)
check_remaining_direction_after_pressed_key(field, pac);
}
static void eat_energizer(game_space field, struct pacman *pac)
{
if(field_has_energizer(field, pac->position.x, pac->position.y)) {
pac->is_energizer_eaten = 1;
clear_energizer(field, pac->position);
}
}
void make_pac_move(game_space field, struct pacman *pac,
struct queue *eaten_coins)
{
clear_or_revert_symbol(field, pac->position, pac_char, eaten_coins);
switch(pac->direction) {
case left:
--pac->position.x;
break;
case right:
++pac->position.x;
break;
case up:
--pac->position.y;
break;
case down:
++pac->position.y;
break;
default:
return;
}
if(check_coin_for_pac(field, pac->position, eaten_coins)) {
queue_push(eaten_coins, &pac->position);
++pac->score;
}
change_point_if_outside_tunnel(&pac->position);
eat_energizer(field, pac);
}
void catch_pac(struct pacman *pac)
{
--pac->lives;
erase_life(pac->lives);
pac->direction = none;
}
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