You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
148 lines
3.2 KiB
148 lines
3.2 KiB
/*==LICENSE==* |
|
|
|
CyanWorlds.com Engine - MMOG client, server and tools |
|
Copyright (C) 2011 Cyan Worlds, Inc. |
|
|
|
This program is free software: you can redistribute it and/or modify |
|
it under the terms of the GNU General Public License as published by |
|
the Free Software Foundation, either version 3 of the License, or |
|
(at your option) any later version. |
|
|
|
This program is distributed in the hope that it will be useful, |
|
but WITHOUT ANY WARRANTY; without even the implied warranty of |
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
|
GNU General Public License for more details. |
|
|
|
You should have received a copy of the GNU General Public License |
|
along with this program. If not, see <http://www.gnu.org/licenses/>. |
|
|
|
You can contact Cyan Worlds, Inc. by email legal@cyan.com |
|
or by snail mail at: |
|
Cyan Worlds, Inc. |
|
14617 N Newport Hwy |
|
Mead, WA 99021 |
|
|
|
*==LICENSE==*/ |
|
|
|
#ifndef plTimedInterp_inc |
|
#define plTimedInterp_inc |
|
|
|
// There's no auto update on this, the owner is |
|
// required to call update periodically. |
|
// |
|
// This isn't optimized in any way, and is still |
|
// fairly general. Adding features would most likely |
|
// be best implemented in a derived type. |
|
// Notably lacking features are: |
|
// ability to read and write, |
|
// auto-eval on significant time change |
|
// |
|
// |
|
// Requires class T to have the following members |
|
// T& operator+=(const class T& t); |
|
// T& operator-=(const class T& t); |
|
// T& operator*=(hsScalar scale); |
|
// T& operator=(const class T&); // unless builtin = is adequate. |
|
// |
|
template <class T> class plTimedInterp |
|
{ |
|
protected: |
|
T fInit; |
|
T fCurr; |
|
T fTarg; |
|
|
|
double fDuration; |
|
double fEnd; |
|
|
|
const T& IEnd(); |
|
const T& IBegin(); |
|
const T& IEval(hsScalar parm); |
|
public: |
|
plTimedInterp(); |
|
plTimedInterp(const T& t); |
|
|
|
const T& Set(const T& val) { return SetTarget(val, 0, 0); } |
|
const T& SetTarget(const T& targ, double start, double duration); |
|
|
|
const T& Update(double t); |
|
|
|
operator T() const { return fCurr; } |
|
const T& Value() const { return fCurr; } |
|
}; |
|
|
|
template <class T> |
|
plTimedInterp<T>::plTimedInterp() |
|
: fDuration(0), |
|
fEnd(0) |
|
{ |
|
} |
|
|
|
template <class T> |
|
plTimedInterp<T>::plTimedInterp(const T& t) |
|
: fInit(t), |
|
fCurr(t), |
|
fTarg(t), |
|
fDuration(0), |
|
fEnd(0) |
|
{ |
|
} |
|
|
|
template <class T> |
|
const T& |
|
plTimedInterp<T>::Update(double t) |
|
{ |
|
if( fDuration <= 0 ) |
|
return IEnd(); |
|
|
|
hsScalar parm = hsScalar((fEnd - t) / fDuration); |
|
if( parm <= 0 ) |
|
return IEnd(); |
|
else if( parm >= 1.f ) |
|
return IBegin(); |
|
|
|
return IEval(parm); |
|
} |
|
|
|
template <class T> |
|
const T& |
|
plTimedInterp<T>::SetTarget(const T& targ, double start, double dur) |
|
{ |
|
fEnd = start + dur; |
|
fDuration = dur; |
|
fTarg = targ; |
|
if( dur <= 0 ) |
|
fCurr = targ; |
|
fInit = fCurr; |
|
return fCurr; |
|
} |
|
|
|
template <class T> |
|
const T& |
|
plTimedInterp<T>::IEnd() |
|
{ |
|
fDuration = 0; |
|
fCurr = fTarg; |
|
return fCurr; |
|
} |
|
|
|
template <class T> |
|
const T& |
|
plTimedInterp<T>::IBegin() |
|
{ |
|
return fCurr; |
|
} |
|
|
|
template <class T> |
|
const T& |
|
plTimedInterp<T>::IEval(hsScalar parm) |
|
{ |
|
fCurr = fInit; |
|
fCurr -= fTarg; |
|
fCurr *= parm; |
|
fCurr += fTarg; |
|
return fCurr; |
|
} |
|
|
|
|
|
#endif // plTimedInterp_inc |
|
|
|
|