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#ifndef _GAME_H
#define _GAME_H
#ifndef LOCAL
#define LOCAL extern
#else
#define WALK_CYCLE 4
// walk animation frames, private
const uint8_t walk_frames[WALK_CYCLE] = { 0, 1, 0, 2 };
#endif
/**
* Game implementation and helpers.
*/
// map size in tiles
#define MAP_W 32
#define MAP_H 21
// some useful tiles
#define LAST_SOLID_TILE 10
#define BATTERY_TILE 224
#define MAX_LIVES 3
// player + other entities
#define MAX_ENTITIES 11
// MSB in our entity data
#define DIR_FLAG 128
// sprite direction
#define DIR_LEFT 1
#define DIR_RIGHT 0
// how long we wait between animation frames
#define FRAME_WAIT 3
// how long the player is invulnerable after death
// time in frames
#define INVUL_TIME 64
// show some game frames before jumping to the game over
// screen; this helps the player to know what happened
#define GAMEOVER_DELAY 72
// types for our pattern groups
// used by spman
enum pattern_type
{
PAT_PLAYER = 0,
PAT_PLAYER_FLIP,
PAT_ENEMY,
PAT_ENEMY_FLIP,
};
// entity types in the same order
// used in the map (see map_conf.json)
enum entity_type
{
ET_UNUSED = 0,
ET_PLAYER,
ET_ENEMY,
};
// notes:
//
// - x, y are the logic position on the map
// - sp.x, sp.y are the position on screen
struct entity
{
uint8_t type;
uint8_t x;
uint8_t y;
uint8_t dir;
uint8_t pat;
uint8_t flags;
uint8_t delay;
uint8_t frame;
void (*update)();
};
void run_game();
void update_player();
void update_enemy();
void draw_map();
void draw_hud();
void erase_battery(uint8_t x, uint8_t y);
uint8_t is_map_blocked(uint8_t x, uint8_t y);
uint8_t is_map_elevator_up(uint8_t x, uint8_t y);
uint8_t is_map_elevator_down(uint8_t x, uint8_t y);
// our entities; the player is 0
LOCAL struct entity entities[MAX_ENTITIES];
// used to read our control method
LOCAL uint8_t control;
// current map; pointer in ROM
LOCAL const uint8_t *cur_map;
// current map tile map (map data, not entities)
// we don't use ROM because we will modify it
LOCAL uint8_t cur_map_data[MAP_W * MAP_H];
// player lives
LOCAL uint8_t lives;
// invulnerability time after death
LOCAL uint8_t invuln;
// batteries left
LOCAL uint8_t batteries;
// show some delay once the lives run out
LOCAL uint8_t gameover_delay;
// used by all entities
LOCAL struct sprite_attr sp;
// current entity
LOCAL struct entity *self;
#ifdef LOCAL
#undef LOCAL
#endif
#endif // _GAME_H
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