void write(lisp::Writer& writer);
HitResponse collision_solid(GameObject& other, const CollisionHit& hit);
HitResponse collision_player(Player& player, const CollisionHit& hit);
void write(lisp::Writer& writer);
HitResponse collision_solid(GameObject& other, const CollisionHit& hit);
HitResponse collision_player(Player& player, const CollisionHit& hit);