HitResponse collision_badguy(BadGuy& other, const CollisionHit& hit);
void collision_solid(const CollisionHit& hit);
HitResponse collision_player(Player& player, const CollisionHit& hit);
HitResponse collision_badguy(BadGuy& other, const CollisionHit& hit);
void collision_solid(const CollisionHit& hit);
HitResponse collision_player(Player& player, const CollisionHit& hit);