//========= Copyright Valve Corporation, All rights reserved. ============//
//
// Purpose:
//
//=============================================================================//

#ifndef POSITIONWATCHER_H
#define POSITIONWATCHER_H
#ifdef _WIN32
#pragma once
#endif

#include "ehandle.h"

// inherit from this interface to be able to call WatchPositionChanges
abstract_class IWatcherCallback{public : virtual ~IWatcherCallback(){}};

abstract_class IPositionWatcher : public IWatcherCallback {
   public:
    virtual void NotifyPositionChanged(CBaseEntity * pEntity) = 0;
};

// NOTE: The table of watchers is NOT saved/loaded!  Recreate these links on
// restore
void ReportPositionChanged(CBaseEntity *pMovedEntity);
void WatchPositionChanges(CBaseEntity *pWatcher, CBaseEntity *pMovingEntity);
void RemovePositionWatcher(CBaseEntity *pWatcher, CBaseEntity *pMovingEntity);

// inherit from this interface to be able to call WatchPositionChanges
abstract_class IVPhysicsWatcher : public IWatcherCallback {
   public:
    virtual void NotifyVPhysicsStateChanged(
        IPhysicsObject * pPhysics, CBaseEntity * pEntity, bool bAwake) = 0;
};

// NOTE: The table of watchers is NOT saved/loaded!  Recreate these links on
// restore
void ReportVPhysicsStateChanged(IPhysicsObject *pPhysics, CBaseEntity *pEntity,
                                bool bAwake);
void WatchVPhysicsStateChanges(CBaseEntity *pWatcher,
                               CBaseEntity *pPhysicsEntity);
void RemoveVPhysicsStateWatcher(CBaseEntity *pWatcher,
                                CBaseEntity *pPhysicsEntity);

#endif  // POSITIONWATCHER_H