void move_bullets(void)
{
BULLET *bullet = bullet_list;
while (bullet) {
bullet->y -= BULLET_SPEED;
/* if the bullet is at the top of the screen, delete it */
if (bullet->y < 8) {
bullet = delete_bullet(bullet);
goto bullet_updated;
}
else {
/* shot an asteroid? */
if (asteroid_collision(bullet->x, bullet->y, 20)) {
score += 10;
play_sample(data[BOOM_SPL].dat, 255, PAN(bullet->x), 1000, FALSE);
/* delete the bullet that killed the alien */
bullet = delete_bullet(bullet);
goto bullet_updated;
}
}
bullet = bullet->next;
bullet_updated:;
}
}
void delete_enemy(enemy * enemy)
{
int j;
SDL_FreeSurface(enemy->sprite);
for (j = 0; j < 10; j++) {
delete_bullet(&(enemy->bullets[j]));
}
}
void delete_player(player * ship)
{
int i, j;
for (i = 0; i < 4; i++) {
for (j = 0; j < 4; j++) {
SDL_FreeSurface(ship->sprites[i][j]);
}
}
for (i = 0; i < 4; i++) {
for (j = 0; j < 10; j++) {
delete_bullet(&(ship->bullets[i][j]));
}
}
}