/*
TimeDependent.h
Common base class for CTDamper and CTChaser.
Forms an object that needs to perform actions
in a frequent manner, e.g. in an animation
framework. Provides a Tick(.) method that is
to be called frequently and can announce when
it needs thos method calls and when not.
Author:
Herbert Stocker
HomePage:
http://www.hersto.net/Followers
(various resources there)
License:
You may use this file in any project and
modify it as long as you keep this comment
block unchanged.
Accompanying Files:
TimeDependent.cpp
Documentation:
See http://www.hersto.net/Followers
*/
#pragma once
class CTimeDependent
{
public:
CTimeDependent();
virtual ~CTimeDependent();
virtual void Tick(double DeltaT, double Now); // does an update to the internal state and calls the receiver function set with SetReceiver if a change to value has happened.
virtual void SetNeedTickCB(void* pvContext, double (*pfNeedTickCB) (void* pvContext, CTimeDependent* pCaller, bool bNeedTick));
protected:
void* mpvNeedTickContext;
double (*mpfNeedTickCB) (void* pvContext, CTimeDependent* pCaller, bool bNeedTick);
void mfUnRegisterFromTimer();
// should be called from the destructor of the derived class if
// the timer needs to see the derived class.
// Otherwise the destructor of CTimeDependent will unregister,
// which would make the timer see only a CTimeDependent object,
// because then the derived class members have already been destroyed.
// (The compiler will even adjust the vtable for this)
};
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