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#include "ghosts.h"
#include "field.h"
void initialize_ghost(struct ghost_type *ghost, enum ghost_color color)
{
switch(color) {
case red:
ghost->position.y = red_y;
ghost->position.x = red_x;
ghost->home_position.y = red_home_y;
ghost->home_position.x = red_home_x;
ghost->color = red;
ghost->mode = scatter;
ghost->direction = none;
break;
case pink:
ghost->position.y = pink_y;
ghost->position.x = pink_x;
ghost->home_position.y = pink_home_y;
ghost->home_position.x = pink_home_x;
ghost->color = pink;
ghost->mode = scatter;
ghost->direction = none;
break;
case blue:
ghost->position.y = blue_y;
ghost->position.x = blue_x;
ghost->home_position.y = blue_home_y;
ghost->home_position.x = blue_home_x;
ghost->color = blue;
ghost->mode = scatter;
ghost->direction = none;
break;
case orange:
ghost->position.y = orange_y;
ghost->position.x = orange_x;
ghost->home_position.y = orange_home_y;
ghost->home_position.x = orange_home_x;
ghost->color = orange;
ghost->mode = scatter;
ghost->direction = none;
break;
}
}
void pull_out_ghosts(int *get_out_stage,
struct ghost_type *red_ghost,
struct ghost_type *pink_ghost,
struct ghost_type *blue_ghost,
struct ghost_type *orange_ghost)
{
enum { final_stage = 1 };
enum movement_direction red_moves[] = { none, right, up, up, left };
enum movement_direction blue_moves[] = { none, left, up, up, left };
enum movement_direction pink_moves[] = { right, up, up, up, right };
enum movement_direction orange_moves[] = { left, up, up, up, right };
int index = *get_out_stage - 1;
if(*get_out_stage > final_stage) {
red_ghost->direction = red_moves[index];
blue_ghost->direction = blue_moves[index];
}
pink_ghost->direction = pink_moves[index];
orange_ghost->direction = orange_moves[index];
--*get_out_stage;
}
static void change_position(struct ghost_type *ghost,
enum movement_direction direction)
{
switch(direction) {
case left:
--ghost->position.x;
return;
case right:
++ghost->position.x;
return;
case up:
--ghost->position.y;
return;
case down:
++ghost->position.y;
return;
default:
return;
}
}
void make_ghost_moves(game_space field,
struct ghost_type *red_ghost,
struct ghost_type *pink_ghost,
struct ghost_type *blue_ghost,
struct ghost_type *orange_ghost)
{
clear_symbol(field, red_ghost->position.y, red_ghost->position.x,
ghost_char);
clear_symbol(field, pink_ghost->position.y, pink_ghost->position.x,
ghost_char);
clear_symbol(field, blue_ghost->position.y, blue_ghost->position.x,
ghost_char);
clear_symbol(field, orange_ghost->position.y, orange_ghost->position.x,
ghost_char);
change_position(red_ghost, red_ghost->direction);
change_position(pink_ghost, pink_ghost->direction);
change_position(blue_ghost, blue_ghost->direction);
change_position(orange_ghost, orange_ghost->direction);
}
static void pave_only_way(game_space field, struct ghost_type *ghost)
{
struct free_directions path = find_free_directions(field, ghost->position.y,
ghost->position.x);
enum movement_direction reverse_direction = ghost->direction;
reverse_direction ^= 1;
if(path.left && left != reverse_direction)
ghost->direction = left;
else if(path.right && right != reverse_direction)
ghost->direction = right;
else if(path.up && up != reverse_direction)
ghost->direction = up;
else if(path.down && down != reverse_direction)
ghost->direction = down;
}
void redirect(game_space field, enum intersection_type paths,
struct ghost_type *ghost,
void (*pathfinder)(game_space field, enum intersection_type paths,
struct ghost_type *ghost))
{
if(paths == one_path)
pave_only_way(field, ghost);
else if(paths == two_paths || paths == three_paths)
pathfinder(field, paths, ghost);
}
void breadth_first_search(game_space field, enum intersection_type paths,
struct ghost_type *ghost)
{
}
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