static void damage_ship(struct GameState *game_state, struct Ship *ship, int32 damage)
{
ship->health -= damage;
if (ship->health <= 0)
destroy_ship(game_state, ship);
}
int main(int argc, char **argv)
{
ALLEGRO_DISPLAY *display = NULL;
ALLEGRO_EVENT_QUEUE *event_queue = NULL;
ALLEGRO_TIMER *timer = NULL;
ALLEGRO_FONT *font_arial_36 = NULL;
ALLEGRO_FONT *font_arial_24 = NULL;
ALLEGRO_TRANSFORM transform;
bool key[6] = { false, false, false, false, false, true };
bool redraw = true;
bool doexit = false;
char display_score[20];
char display_lives[20];
char display_ammo[20];
char display_countdown[20];
int ammo = 99;
if(!al_init()) {
fprintf(stderr, "failed to initialize allegro!\n");
return -1;
}
al_init_font_addon();
if (!al_init_ttf_addon()) {
fprintf(stderr, "failed to initialize ttf addon!\n");
return -1;
}
if(!al_install_keyboard()) {
fprintf(stderr, "failed to initialize the keyboard!\n");
return -1;
}
timer = al_create_timer(1.0 / FPS);
if(!timer) {
fprintf(stderr, "failed to create timer!\n");
return -1;
}
display = al_create_display(SCREEN_W, SCREEN_H);
if(!display) {
fprintf(stderr, "failed to create display!\n");
al_destroy_timer(timer);
return -1;
}
event_queue = al_create_event_queue();
if(!event_queue) {
fprintf(stderr, "failed to create event_queue!\n");
al_destroy_display(display);
al_destroy_timer(timer);
return -1;
}
font_arial_36 = al_load_ttf_font("arial.ttf", 36, 0);
if (!font_arial_36){
fprintf(stderr, "arial 36 not loaded!\n" );
return -1;
}
font_arial_24 = al_load_ttf_font("arial.ttf", 24, 0);
if (!font_arial_36){
fprintf(stderr, "arial 24 not loaded!\n" );
return -1;
}
al_init_primitives_addon();
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_keyboard_event_source());
/* Start game */
Spaceship* ship = new_ship();
last = make_roids(ROIDS);
Blast **blasts = new_blasts();
int countdown = 10;
while(countdown && !DEBUG_MODE) {
al_clear_to_color(al_map_rgb(0,0,0));
/* Welcome - Ugly code, write nicer function. */
al_identity_transform(&transform);
al_use_transform(&transform);
al_draw_text(font_arial_36,
al_map_rgb(255,0,0),
SCREEN_W/2,
100,
ALLEGRO_ALIGN_CENTRE,
"Welcome to Casper's BLASTEROIDS!");
al_identity_transform(&transform);
al_use_transform(&transform);
al_draw_text(font_arial_24,
al_map_rgb(230,230,230),
SCREEN_W/2,
150,
ALLEGRO_ALIGN_CENTRE,
"You got three lives, 100 shots and a lot of asteroids to blast.");
al_identity_transform(&transform);
al_use_transform(&transform);
al_draw_text(font_arial_24,
al_map_rgb(230,230,230),
SCREEN_W/2,
170,
ALLEGRO_ALIGN_CENTRE,
"Fire with space, steer with the arrow keys and hit escape");
al_identity_transform(&transform);
al_use_transform(&transform);
al_draw_text(font_arial_24,
al_map_rgb(230,230,230),
SCREEN_W/2,
190,
ALLEGRO_ALIGN_CENTRE,
"if you don't dare to play to the end...");
al_identity_transform(&transform);
al_use_transform(&transform);
al_draw_text(font_arial_24,
al_map_rgb(230,230,230),
SCREEN_W/2,
230,
ALLEGRO_ALIGN_CENTRE,
"(If you get hit by and asteroid, you will die,");
al_identity_transform(&transform);
al_use_transform(&transform);
al_draw_text(font_arial_24,
al_map_rgb(230,230,230),
SCREEN_W/2,
250,
ALLEGRO_ALIGN_CENTRE,
"the first five seconds of a new life, they won't hurt you.)");
sprintf(display_countdown, "%d", countdown);
al_identity_transform(&transform);
al_use_transform(&transform);
al_draw_text(font_arial_24,
al_map_rgb(230,230,230),
SCREEN_W/2,
300,
ALLEGRO_ALIGN_CENTRE,
display_countdown);
al_flip_display();
sleep(1);
countdown--;
}
al_start_timer(timer);
while(!doexit) {
ALLEGRO_EVENT ev;
al_wait_for_event(event_queue, &ev);
if(ev.type == ALLEGRO_EVENT_TIMER) {
redraw = true;
if(ship->timer > 0)
ship->timer--;
}
else if(ev.type == ALLEGRO_EVENT_DISPLAY_CLOSE) {
break;
}
else if(ev.type == ALLEGRO_EVENT_KEY_DOWN) {
switch(ev.keyboard.keycode) {
case ALLEGRO_KEY_K:
case ALLEGRO_KEY_UP:
key[KEY_UP] = true;
move_ship(ship, KEY_UP);
break;
case ALLEGRO_KEY_J:
case ALLEGRO_KEY_DOWN:
key[KEY_DOWN] = true;
move_ship(ship, KEY_DOWN);
break;
case ALLEGRO_KEY_H:
case ALLEGRO_KEY_LEFT:
key[KEY_LEFT] = true;
move_ship(ship, KEY_LEFT);
break;
case ALLEGRO_KEY_L:
case ALLEGRO_KEY_RIGHT:
key[KEY_RIGHT] = true;
move_ship(ship, KEY_RIGHT);
break;
case ALLEGRO_KEY_SPACE:
key[KEY_SPACE] = true;
if (ammo>0) {
shoot_blast(blasts[ammo], ship);
ammo--;
}
break;
case ALLEGRO_KEY_ESCAPE:
doexit = true;
break;
}
}
if(redraw && al_is_event_queue_empty(event_queue)) {
redraw = false;
al_clear_to_color(al_map_rgb(0,0,0));
move_ship(ship, NONE);
draw_ship(ship);
move_blasts(blasts);
draw_blasts(blasts);
check_collision(last, ship, blasts);
move_roids(last);
draw_roids(last);
if(!ship->lives || !ammo) {
/* Game over. */
al_identity_transform(&transform);
al_use_transform(&transform);
al_draw_text(font_arial_36,
al_map_rgb(200,200,200),
SCREEN_W/2,
SCREEN_H/2-100,
ALLEGRO_ALIGN_CENTRE,
"GAME OVER");
doexit = "true";
}
if(!ROIDS_ALIVE) {
/* You Won. */
al_identity_transform(&transform);
al_use_transform(&transform);
al_draw_text(font_arial_36,
al_map_rgb(200,200,200),
SCREEN_W/2,
SCREEN_H/2-100,
ALLEGRO_ALIGN_CENTRE,
"YOU WON");
doexit = "true";
}
/* Score */
al_identity_transform(&transform);
al_use_transform(&transform);
sprintf(display_score, "%d", score);
al_draw_text(font_arial_24,
al_map_rgb(200,200,200),
50,
10,
ALLEGRO_ALIGN_CENTRE,
display_score);
/* Lives */
sprintf(display_lives, "%d", ship->lives);
al_draw_text(font_arial_24,
al_map_rgb(200,200,200),
SCREEN_W-50,
10,
ALLEGRO_ALIGN_CENTRE,
display_lives);
/* Ammo */
al_identity_transform(&transform);
al_use_transform(&transform);
sprintf(display_ammo, "%d", ammo);
al_draw_text(font_arial_24,
al_map_rgb(200,200,200),
50,
SCREEN_H-50,
ALLEGRO_ALIGN_CENTRE,
display_ammo);
al_flip_display();
if (doexit)
sleep(3);
}
}
destroy_ship(ship);
destroy_roids(last);
destroy_blasts(blasts);
/* End game. */
al_shutdown_primitives_addon();
al_destroy_timer(timer);
al_destroy_display(display);
al_destroy_event_queue(event_queue);
return 0;
}
