+Entity::~Entity() noexcept {
+ UnsetController();
+}
+
+Entity::Entity(const Entity &other) noexcept
+: ctrl(other.ctrl)
+, model(other.model)
+, id(-1)
+, name(other.name)
+, bounds(other.bounds)
+, state(other.state)
+, max_vel(other.max_vel)
+, max_force(other.max_force)
+, ref_count(0)
+, world_collision(other.world_collision)
+, dead(other.dead)
+, owns_controller(false) {
+
+}
+
+void Entity::SetController(EntityController *c) noexcept {
+ UnsetController();
+ ctrl = c;
+ owns_controller = true;
+}
+
+void Entity::SetController(EntityController &c) noexcept {
+ UnsetController();
+ ctrl = &c;
+ owns_controller = false;
+}
+
+void Entity::UnsetController() noexcept {
+ if (ctrl && owns_controller) {
+ delete ctrl;
+ }
+ ctrl = nullptr;
+}
+
+glm::vec3 Entity::ControlForce(const EntityState &s) const noexcept {
+ if (HasController()) {
+ return GetController().ControlForce(s);
+ } else {
+ return -s.velocity;
+ }
+}
+