SHIP *
ship_update(SHIP *ship, bool keys[], ALLEGRO_TIMER *timer)
{
LIST *head = NULL;
/* move forward */
if(keys[KEY_UP])
ship_accelerate(ship);
/* rotate */
if(keys[KEY_LEFT])
ship_rotate(ship, -3);
if(keys[KEY_RIGHT])
ship_rotate(ship, 3);
/* hyperspace */
if(keys[KEY_LCONTROL])
ship_hyperspace(ship);
/* shoot */
if(keys[KEY_SPACE])
ship_fire(ship, timer);
if(ship->explosion) {
animation_update(ship->explosion);
/* if the animation is complete, create a new ship */
if(ship->explosion->current_frame >= ship->explosion->n_frames - 1) {
/* FIXME: need preemptive collision detection, wait() */
SHIP *old = ship;
ship = ship_create();
ship_free(old);
}
return ship;
}
/* ship missile positions */
head = list_first(ship->missiles);
while(head) {
missile_update((MISSILE *) head->data, timer);
head = head->next;
}
ship->position->x += ship->velocity->x;
ship->position->y += ship->velocity->y;
wrap_position(ship->position);
/* slow down over time */
ship_drag(ship);
return ship;
}
void apply_velocity(Object* obj)
{
X_y temp;
temp = Vector_to_X_y(obj->velocity);
obj->pos.x += temp.x;
obj->pos.y += -temp.y; // apply negative y velocity due to screen coordinates
// wrap screen
wrap_position(obj);
}
