scufpong/src/common/game.h

#ifndef GAME_H_
#define GAME_H_

#include <stdint.h>

#include "cglm/types.h"

#include "scufeng/engine.h"

#define XGameStateEvent(X) \
    X(GSEVENT_NONE) \
    X(GSEVENT_L_SCORE) \
    X(GSEVENT_R_SCORE) \
    X(GSEVENT_BALL_DIR_CHANGE) \
    X(GSEVENT_L_WIN) \
    X(GSEVENT_R_WIN)

#define X(evt) evt,

typedef enum {
    XGameStateEvent(X)
} GameStateEvent;

#undef X

typedef struct {
    vec2 pos;
    float w;
    float h;
    vec2 dirv;
    float speed;
} MovingObject;

typedef struct {
    float paddles_w;
    float paddles_h;
    float paddle_l_x;
    float paddle_speed;
    float ball_w;
    vec2 ball_pos;
    float ball_speed;
} GameStateParameters;

typedef struct {
    bool ai_enabled;
    MovingObject paddle_l;
    MovingObject paddle_r;
    MovingObject ball;
    vec2 ball_start_pos;
    vec2 ball_start_dir;
    uint8_t score_l;
    uint8_t score_r;
} GameState;

const char *GameStateEvent_to_str(const GameStateEvent evt);
GameState GameState_new(
    const GameStateParameters params,
    const bool ai_enabled
);
void GameState_paddle_l_change_dir(GameState *const state, const SEDirection dir);
void GameState_paddle_r_change_dir(GameState *const state, const SEDirection dir);
GameStateEvent GameState_update(GameState *const state, const double delta);
SEDirection GameState_paddle_l_dir_get(const GameState *const state);

extern const GameStateParameters game_default_params;

#endif // GAME_H_