Trigger.hpp

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#pragma once
 
#include <functional>
#include <map>
#include <memory>
 
class PhysicsManager;
 
namespace Physics {
class Shape;
class TriggerObserver;
 
class Trigger {
    friend class ::PhysicsManager;
 
  private:
    // Construct a trigger with world transform |transform|.
    explicit Trigger(const btTransform& transform);
 
    // Process observers against the trigger volume, passing the world
    // in which rigid bodies reside.
    void Process(btCollisionWorld& world);
 
    // Get access to a particular observer of the trigger to work with
    // it in a user-defined way. If the observer is not present, one
    // will be created.
    void ForObserver(btCollisionObject* body, const std::function<void(TriggerObserver&)>& fun);
 
    void SetCollisionShape(std::shared_ptr<Shape> shape);
    void SetPosition(const btVector3& position);
 
  private:
    std::unique_ptr<btCollisionObject> trigger = nullptr;
    std::shared_ptr<Shape> shape = nullptr;
    std::vector<std::unique_ptr<TriggerObserver>> observers;
};
} // namespace Physics