/* starting game UI */
void start_game (bool Fullscreen) {
/* creating display */
ALLEGRO_DISPLAY * display;
if (Fullscreen) {
/* creating disp_data struct to store supported resolutions */
ALLEGRO_DISPLAY_MODE disp_data;
/* making it fullscreen */
al_set_new_display_flags(ALLEGRO_FULLSCREEN);
/* storing info */
al_get_display_mode(al_get_num_display_modes() - 1, &disp_data);
CurrentScreenWidth = disp_data.width;
CurrentScreenHeight = disp_data.height;
/* creating display with different resolutions for different screens */
display = al_create_display(CurrentScreenWidth, CurrentScreenHeight);
}
else {
al_set_new_display_flags(ALLEGRO_WINDOWED);
display = al_create_display(CurrentScreenWidth, CurrentScreenHeight);
}
if (!display) {
al_show_native_message_box(display, "Error", "Display Settings", "Couldn't create a display.", NULL, ALLEGRO_MESSAGEBOX_ERROR);
exit(-1);
}
/* setting new window title */
al_set_window_title(display, "Snake");
// -----------------------
/* creating fonts */
ALLEGRO_FONT * font = al_load_font(MainFont, 36, ALLEGRO_ALIGN_CENTER);
ALLEGRO_FONT * credits_font = al_load_font(CreditsFont, 20, NULL);
if (!font) {
al_show_native_message_box(display, "Error", "Could not load font file.", "Have you included the resources in the same directory of the program?", NULL, ALLEGRO_MESSAGEBOX_ERROR);
exit(-1);
}
/* loading audio samples */
ALLEGRO_SAMPLE * over_button_sound = al_load_sample(OverButton);
ALLEGRO_SAMPLE * pressed_button_sound = al_load_sample(PressedButton);
ALLEGRO_SAMPLE * eating_apple_sound = al_load_sample(EatApple);
ALLEGRO_SAMPLE * game_over_sound = al_load_sample(GameOverSound);
if (!over_button_sound || !pressed_button_sound) {
al_show_native_message_box(display, "Error", "Could not load one or more sound files.", "Your resources folder must be corrupt, please download it again.", NULL, ALLEGRO_MESSAGEBOX_ERROR);
exit(-1);
}
al_reserve_samples(2);
/* creating timer */
ALLEGRO_TIMER * timer = al_create_timer(1.0 / FPS);
ALLEGRO_TIMER *frametimer = al_create_timer(1.0 / frameFPS);
/* creating event queue */
ALLEGRO_EVENT_QUEUE * event_queue = al_create_event_queue();
al_register_event_source(event_queue, al_get_display_event_source(display));
al_register_event_source(event_queue, al_get_timer_event_source(timer));
al_register_event_source(event_queue, al_get_timer_event_source(frametimer));
al_register_event_source(event_queue, al_get_mouse_event_source());
al_register_event_source(event_queue, al_get_keyboard_event_source());
ALLEGRO_KEYBOARD_STATE keystate;
/* loading BITMAPS */
ALLEGRO_BITMAP * SmallWallpaperBitmap = al_load_bitmap(SmallWallpaper);
ALLEGRO_BITMAP * BigWallpaperBitmap = al_load_bitmap(BigWallpaper);
ALLEGRO_BITMAP * mouse = al_load_bitmap(MouseCursor);
ALLEGRO_BITMAP * applepng = al_load_bitmap(Apple_png);
if (!mouse)
{
al_show_native_message_box(display, "Error", "Could not load one or more resource file.", "Your resources folder must be corrupt, please download it again.", NULL, ALLEGRO_MESSAGEBOX_ERROR);
exit(-1);
}
al_hide_mouse_cursor(display);
/* ---- VARIABLES ---- */
bool done = false, change_resolution = false, draw = true;
int mouse_x = CurrentScreenWidth, mouse_y = CurrentScreenHeight;
/* mouse */
bool left_mouse_button_down = false;
bool left_mouse_button_up = false;
/* MAIN MENU */
int button_displacement;
if (!Fullscreen)
{
button_displacement = 20;
}
else
{
button_displacement = 15;
}
Button play_button(50, 20, Blue, 0, -button_displacement);
Button options_button(40, 15, Blue);
Button exit_button(40, 15, Blue, 0, button_displacement);
/* PLAY */
string score;
Direction new_direction;
int speed_up, speed_up_anim_frame = 0;
bool speed_up_anim = false;
Snake snake;
Apple apple;
/* starting timers */
al_start_timer(timer);
al_start_timer(frametimer);
while (!done)
{
/* actually defining our events */
ALLEGRO_EVENT events;
al_wait_for_event(event_queue, &events);
al_get_keyboard_state(&keystate);
switch (gameState)
{
case MainMenu:
{
/* WINDOW */
if (events.type == ALLEGRO_EVENT_DISPLAY_CLOSE)
{
done = true;
}
/* MOUSE */
if (events.type == ALLEGRO_EVENT_MOUSE_AXES)
{
mouse_x = events.mouse.x;
mouse_y = events.mouse.y;
draw = true;
}
if (events.type == ALLEGRO_EVENT_MOUSE_BUTTON_DOWN)
{
/* left button */
if (events.mouse.button & 1)
{
left_mouse_button_down = true;
draw = true;
}
}
if (events.type == ALLEGRO_EVENT_MOUSE_BUTTON_UP)
{
/* left button */
if (events.mouse.button & 1)
{
left_mouse_button_down = false;
left_mouse_button_up = true;
draw = true;
}
}
/* button conditions */
if (play_button.MouseOverButton(mouse_x, mouse_y) && !play_button.StillOverButton)
{
play_button.play_over_button_sound = true;
}
if (options_button.MouseOverButton(mouse_x, mouse_y) && !options_button.StillOverButton)
{
options_button.play_over_button_sound = true;
}
if (exit_button.MouseOverButton(mouse_x, mouse_y) && !exit_button.StillOverButton)
{
exit_button.play_over_button_sound = true;
}
/* KEYBOARD */
if (events.type == ALLEGRO_EVENT_KEY_UP)
{
switch (events.keyboard.keycode)
{
case ALLEGRO_KEY_ESCAPE:
{
done = true;
break;
}
case ALLEGRO_KEY_SPACE:
case ALLEGRO_KEY_ENTER:
{
/* STARTING GAME NOW */
new_direction = RIGHT;
speed_up = 0;
snake.ResetSnakeDetails();
apple.NewApple(snake.GetSnakeCells());
gameState = PlayGame;
}
}
break;
}
/* ------------ NOW DRAWING ------------ */
if (draw)
{
/* drawing wallpaper */
if (Fullscreen)
{
al_draw_scaled_bitmap(BigWallpaperBitmap, 0, 0, al_get_bitmap_width(BigWallpaperBitmap), al_get_bitmap_height(BigWallpaperBitmap), 0, 0, CurrentScreenWidth, CurrentScreenHeight, NULL);
}
else
{
al_draw_bitmap(SmallWallpaperBitmap, 0, 0, 0);
}
/* -- play button -- */
if (play_button.MouseOverButton(mouse_x, mouse_y))
{
play_button.SetButtonColor(LightBlue);
/* button pressed */
if (left_mouse_button_down)
{
play_button.pressed_button = true;
play_button.SetButtonColor(DarkBlue);
}
/* button released */
else if (left_mouse_button_up)
{
play_button.pressed_button = false;
play_button.StillPressingButton = false;
play_button.SetButtonColor(Blue);
/* STARTING GAME NOW */
new_direction = RIGHT;
speed_up = 0;
snake.ResetSnakeDetails();
apple.NewApple(snake.GetSnakeCells());
gameState = PlayGame;
}
play_button.DisplayButton();
}
else
{
play_button.pressed_button = false;
play_button.StillPressingButton = false;
play_button.StillOverButton = false;
play_button.SetButtonColor(Blue);
play_button.DisplayButton();
}
/* -- options button -- */
if (options_button.MouseOverButton(mouse_x, mouse_y))
{
options_button.SetButtonColor(LightBlue);
/* button pressed */
if (left_mouse_button_down)
{
options_button.pressed_button = true;
options_button.SetButtonColor(DarkBlue);
}
/* button released */
else if (left_mouse_button_up)
{
options_button.pressed_button = false;
options_button.StillPressingButton = false;
options_button.SetButtonColor(Blue);
switch (Fullscreen)
{
case 0:
{
Fullscreen = 1;
done = true;
change_resolution = true;
break;
}
case 1:
{
Fullscreen = 0;
done = true;
change_resolution = true;
break;
}
}
}
options_button.DisplayButton();
}
else
{
options_button.pressed_button = false;
options_button.StillPressingButton = false;
options_button.StillOverButton = false;
options_button.SetButtonColor(Blue);
options_button.DisplayButton();
}
/* -- exit button -- */
if (exit_button.MouseOverButton(mouse_x, mouse_y))
{
exit_button.SetButtonColor(LightBlue);
/* button pressed */
if (left_mouse_button_down)
{
exit_button.pressed_button = true;
exit_button.SetButtonColor(DarkBlue);
}
/* button released */
else if (left_mouse_button_up)
{
exit_button.pressed_button = false;
exit_button.StillPressingButton = false;
exit_button.SetButtonColor(Blue);
done = true;
}
exit_button.DisplayButton();
}
else
{
exit_button.pressed_button = false;
exit_button.StillPressingButton = false;
exit_button.StillOverButton = false;
exit_button.SetButtonColor(Blue);
exit_button.DisplayButton();
}
/* -- sound -- */
/* mouse over button */
if (play_button.MouseOverButton(mouse_x, mouse_y) && !play_button.StillOverButton)
{
play_button.StillOverButton = true;
al_play_sample(over_button_sound, 1.0, 0.0, 1.0, ALLEGRO_PLAYMODE_ONCE, 0);
}
if (options_button.MouseOverButton(mouse_x, mouse_y) && !options_button.StillOverButton)
{
options_button.StillOverButton = true;
al_play_sample(over_button_sound, 1.0, 0.0, 1.0, ALLEGRO_PLAYMODE_ONCE, 0);
}
if (exit_button.MouseOverButton(mouse_x, mouse_y) && !exit_button.StillOverButton)
{
exit_button.StillOverButton = true;
al_play_sample(over_button_sound, 1.0, 0.0, 1.0, ALLEGRO_PLAYMODE_ONCE, 0);
}
/* button pressed */
if (play_button.pressed_button && !play_button.StillPressingButton)
{
play_button.StillPressingButton = true;
al_play_sample(pressed_button_sound, 1.0, 0.0, 1.0, ALLEGRO_PLAYMODE_ONCE, 0);
}
else if (options_button.pressed_button && !options_button.StillPressingButton)
{
options_button.StillPressingButton = true;
al_play_sample(pressed_button_sound, 1.0, 0.0, 1.0, ALLEGRO_PLAYMODE_ONCE, 0);
}
else if (exit_button.pressed_button && !exit_button.StillPressingButton)
{
exit_button.StillPressingButton = true;
al_play_sample(pressed_button_sound, 1.0, 0.0, 1.0, ALLEGRO_PLAYMODE_ONCE, 0);
}
/* -- text -- */
string fullscreenmode_string;
if (Fullscreen)
{
fullscreenmode_string = "Fullscreen: On";
}
else
{
fullscreenmode_string = "Fullscreen: Off";
}
al_draw_text(font, White, CurrentScreenWidth / 2, play_button.GetButtonHeightCenter() - 23, ALLEGRO_ALIGN_CENTER, "New Game");
al_draw_text(font, White, CurrentScreenWidth / 2, options_button.GetButtonHeightCenter() - 23, ALLEGRO_ALIGN_CENTER, fullscreenmode_string.c_str());
al_draw_text(font, White, CurrentScreenWidth / 2, exit_button.GetButtonHeightCenter() - 23, ALLEGRO_ALIGN_CENTER, "Exit");
al_draw_text(credits_font, White, 3, CurrentScreenHeight - 20, NULL, "FEUP 2013 - Henrique Ferrolho");
/* -- mouse cursor -- */
al_draw_bitmap(mouse, mouse_x, mouse_y, NULL);
al_flip_display();
al_clear_to_color(al_map_rgb(0, 0, 0));
left_mouse_button_up = false;
draw = false;
}
break;
}
case PlayGame:
{
if (events.type == ALLEGRO_EVENT_DISPLAY_CLOSE)
{
done = true;
}
/* KEYBOARD */
if (events.type == ALLEGRO_EVENT_KEY_UP)
{
switch (events.keyboard.keycode)
{
case ALLEGRO_KEY_ESCAPE:
{
/* going back to MAIN MENU */
draw = true;
gameState = MainMenu;
break;
}
case ALLEGRO_KEY_ENTER:
case ALLEGRO_KEY_SPACE:
{
/* pausing game */
draw = true;
gameState = PauseGame;
break;
}
}
break;
}
if (events.type == ALLEGRO_EVENT_TIMER)
{
if (events.timer.source == timer)
{
draw = true;
/* navigation keys */
if (al_key_down(&keystate, ALLEGRO_KEY_DOWN) || al_key_down(&keystate, ALLEGRO_KEY_S))
{
new_direction = DOWN;
}
else if (al_key_down(&keystate, ALLEGRO_KEY_UP) || al_key_down(&keystate, ALLEGRO_KEY_W))
{
new_direction = UP;
}
else if (al_key_down(&keystate, ALLEGRO_KEY_RIGHT) || al_key_down(&keystate, ALLEGRO_KEY_D))
{
new_direction = RIGHT;
}
else if (al_key_down(&keystate, ALLEGRO_KEY_LEFT) || al_key_down(&keystate, ALLEGRO_KEY_A))
{
new_direction = LEFT;
}
/* checking boundaries */
if (!snake.IsInScreenBoundaries() || snake.EatedItself())
{
draw = true;
al_play_sample(game_over_sound, 1.0, 0.0, 1.0, ALLEGRO_PLAYMODE_ONCE, 0);
gameState = GameOver;
break;
}
}
else if (events.timer.source == frametimer)
{
/* moving snake */
snake.SetSnakeDirection(new_direction);
snake.MoveSnake();
if (snake.EatedApple(apple.GetAppleX(), apple.GetAppleY()))
{
al_play_sample(eating_apple_sound, 0.5, 0.0, 1.0, ALLEGRO_PLAYMODE_ONCE, 0);
apple.NewApple(snake.GetSnakeCells());
snake.IncreaseSnakeLength();
draw = true;
}
}
}
/* ------------ NOW DRAWING ------------ */
if (draw)
{
/* game frame */
if (Fullscreen)
{
al_draw_rectangle(0, 0, CurrentScreenWidth, CurrentScreenHeight, DarkRed, 20);
//al_draw_rectangle(0, 0, 1360, 760, DarkRed, 20);
}
else
{
al_draw_rectangle(0, 0, CurrentScreenWidth, CurrentScreenHeight, DarkRed, 20);
}
apple.DrawApple(applepng);
snake.DrawSnake();
/* increasing speed */
if (snake.GetSnakeCells().size() < 5)
{
al_set_timer_speed(frametimer, 1.0 / frameFPS);
}
else if (snake.GetSnakeCells().size() < 10)
{
if (speed_up == 0)
{
speed_up++;
speed_up_anim = true;
}
al_set_timer_speed(frametimer, 1.0 / 14);
}
else if (snake.GetSnakeCells().size() < 20)
{
if (speed_up == 1)
{
snake.SetColor(LightBlue);
speed_up++;
speed_up_anim = true;
}
al_set_timer_speed(frametimer, 1.0 / 16);
}
else if (snake.GetSnakeCells().size() < 30)
{
if (speed_up == 2)
{
speed_up++;
speed_up_anim = true;
}
al_set_timer_speed(frametimer, 1.0 / 18);
}
else if (snake.GetSnakeCells().size() < 40)
{
if (speed_up == 3)
{
snake.SetColor(DarkRed);
speed_up++;
speed_up_anim = true;
}
al_set_timer_speed(frametimer, 1.0 / 20);
}
/* speed up animation */
if (speed_up_anim)
{
if (speed_up_anim_frame < 10)
{
al_draw_text(font, White, CurrentScreenWidth / 2, (CurrentScreenHeight / 2) - 30, ALLEGRO_ALIGN_CENTER, "SPEED UP!");
speed_up_anim_frame++;
}
else if (speed_up_anim_frame < 20)
{
al_draw_text(font, Yellow, CurrentScreenWidth / 2, (CurrentScreenHeight / 2) - 30, ALLEGRO_ALIGN_CENTER, "SPEED UP!");
speed_up_anim_frame++;
}
else if (speed_up_anim_frame < 30)
{
al_draw_text(font, White, CurrentScreenWidth / 2, (CurrentScreenHeight / 2) - 30, ALLEGRO_ALIGN_CENTER, "SPEED UP!");
speed_up_anim_frame++;
}
else if (speed_up_anim_frame < 40)
{
al_draw_text(font, Yellow, CurrentScreenWidth / 2, (CurrentScreenHeight / 2) - 30, ALLEGRO_ALIGN_CENTER, "SPEED UP!");
speed_up_anim_frame++;
}
else if (speed_up_anim_frame < 50)
{
al_draw_text(font, White, CurrentScreenWidth / 2, (CurrentScreenHeight / 2) - 30, ALLEGRO_ALIGN_CENTER, "SPEED UP!");
speed_up_anim_frame++;
}
else if (speed_up_anim_frame < 60)
{
speed_up_anim = false;
speed_up_anim_frame = 0;
}
}
/* printing score */
stringstream ss;
ss << "Score: " << snake.GetSnakeCells().size();
score = ss.str();
al_draw_text(credits_font, Yellow, 60, 15, ALLEGRO_ALIGN_CENTER, score.c_str());
al_flip_display();
al_clear_to_color(al_map_rgb(0, 0, 0));
draw = false;
}
break;
}
case PauseGame:
{
if (events.type == ALLEGRO_EVENT_DISPLAY_CLOSE)
{
done = true;
}
if (events.type == ALLEGRO_EVENT_KEY_UP)
{
switch (events.keyboard.keycode)
{
case ALLEGRO_KEY_SPACE:
case ALLEGRO_KEY_ENTER:
{
/* resume game */
draw = true;
gameState = PlayGame;
break;
}
}
break;
}
/* ------------ NOW DRAWING ------------ */
if (draw)
{
/* game frame */
if (Fullscreen)
{
al_draw_rectangle(0, 0, CurrentScreenWidth, CurrentScreenHeight, DarkRed, 20);
//al_draw_rectangle(0, 0, 1360, 760, DarkRed, 20);
}
else
{
al_draw_rectangle(0, 0, CurrentScreenWidth, CurrentScreenHeight, DarkRed, 20);
}
apple.DrawApple(applepng);
snake.DrawSnake();
/* printing score */
stringstream ss;
ss << "Score: " << snake.GetSnakeCells().size();
score = ss.str();
al_draw_text(credits_font, Yellow, 60, 15, ALLEGRO_ALIGN_CENTER, score.c_str());
al_draw_text(font, Yellow, CurrentScreenWidth / 2, (CurrentScreenHeight / 2) - 30, ALLEGRO_ALIGN_CENTER, "GAME PAUSED");
al_flip_display();
draw = false;
}
break;
}
case GameOver:
{
if (events.type == ALLEGRO_EVENT_DISPLAY_CLOSE)
{
done = true;
}
/* MOUSE */
if (events.type == ALLEGRO_EVENT_MOUSE_AXES)
{
mouse_x = events.mouse.x;
mouse_y = events.mouse.y;
draw = true;
}
if (events.type == ALLEGRO_EVENT_MOUSE_BUTTON_DOWN)
{
/* left button */
if (events.mouse.button & 1)
{
left_mouse_button_down = true;
draw = true;
}
}
if (events.type == ALLEGRO_EVENT_MOUSE_BUTTON_UP)
{
/* left button */
if (events.mouse.button & 1)
{
left_mouse_button_down = false;
left_mouse_button_up = true;
draw = true;
}
}
/* going to MAIN MENU */
if (events.type == ALLEGRO_EVENT_KEY_UP)
{
switch (events.keyboard.keycode)
{
case ALLEGRO_KEY_SPACE:
case ALLEGRO_KEY_ENTER:
{
draw = true;
gameState = MainMenu;
break;
}
}
break;
}
if (left_mouse_button_up)
{
left_mouse_button_up = false;
draw = true;
gameState = MainMenu;
break;
}
if (draw)
{
al_draw_filled_rectangle(0, 0, CurrentScreenWidth, CurrentScreenHeight, DarkRed);
/* printing score */
stringstream ss;
ss << "Score: " << snake.GetSnakeCells().size();
score = ss.str();
al_draw_text(font, Yellow, CurrentScreenWidth / 2, (CurrentScreenHeight / 2) - 80, ALLEGRO_ALIGN_CENTER, score.c_str());
al_draw_text(font, White, CurrentScreenWidth / 2, (CurrentScreenHeight / 2) - 30, ALLEGRO_ALIGN_CENTER, "Click to continue");
/* -- mouse cursor -- */
al_draw_bitmap(mouse, mouse_x, mouse_y, NULL);
al_flip_display();
}
break;
}
}
}
/* dealocating memory */
al_destroy_display(display);
al_destroy_font(font);
al_destroy_timer(timer);
al_destroy_bitmap(mouse);
al_destroy_sample(over_button_sound);
al_destroy_sample(pressed_button_sound);
al_destroy_event_queue(event_queue);
if (change_resolution)
{
CurrentScreenWidth = DefaultScreenWidth;
CurrentScreenHeight = DefaultScreenHeight;
start_game(Fullscreen);
}
}
