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164 lines
4.0 KiB
164 lines
4.0 KiB
/*==LICENSE==* |
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CyanWorlds.com Engine - MMOG client, server and tools |
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Copyright (C) 2011 Cyan Worlds, Inc. |
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This program is free software: you can redistribute it and/or modify |
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it under the terms of the GNU General Public License as published by |
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the Free Software Foundation, either version 3 of the License, or |
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(at your option) any later version. |
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This program is distributed in the hope that it will be useful, |
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but WITHOUT ANY WARRANTY; without even the implied warranty of |
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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GNU General Public License for more details. |
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You should have received a copy of the GNU General Public License |
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along with this program. If not, see <http://www.gnu.org/licenses/>. |
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Additional permissions under GNU GPL version 3 section 7 |
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If you modify this Program, or any covered work, by linking or |
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combining it with any of RAD Game Tools Bink SDK, Autodesk 3ds Max SDK, |
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NVIDIA PhysX SDK, Microsoft DirectX SDK, OpenSSL library, Independent |
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JPEG Group JPEG library, Microsoft Windows Media SDK, or Apple QuickTime SDK |
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(or a modified version of those libraries), |
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containing parts covered by the terms of the Bink SDK EULA, 3ds Max EULA, |
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PhysX SDK EULA, DirectX SDK EULA, OpenSSL and SSLeay licenses, IJG |
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JPEG Library README, Windows Media SDK EULA, or QuickTime SDK EULA, the |
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licensors of this Program grant you additional |
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permission to convey the resulting work. Corresponding Source for a |
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non-source form of such a combination shall include the source code for |
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the parts of OpenSSL and IJG JPEG Library used as well as that of the covered |
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work. |
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You can contact Cyan Worlds, Inc. by email legal@cyan.com |
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or by snail mail at: |
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Cyan Worlds, Inc. |
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14617 N Newport Hwy |
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Mead, WA 99021 |
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*==LICENSE==*/ |
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#ifndef plTimedInterp_inc |
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#define plTimedInterp_inc |
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// There's no auto update on this, the owner is |
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// required to call update periodically. |
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// |
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// This isn't optimized in any way, and is still |
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// fairly general. Adding features would most likely |
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// be best implemented in a derived type. |
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// Notably lacking features are: |
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// ability to read and write, |
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// auto-eval on significant time change |
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// |
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// |
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// Requires class T to have the following members |
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// T& operator+=(const class T& t); |
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// T& operator-=(const class T& t); |
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// T& operator*=(hsScalar scale); |
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// T& operator=(const class T&); // unless builtin = is adequate. |
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// |
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template <class T> class plTimedInterp |
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{ |
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protected: |
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T fInit; |
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T fCurr; |
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T fTarg; |
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double fDuration; |
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double fEnd; |
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const T& IEnd(); |
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const T& IBegin(); |
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const T& IEval(hsScalar parm); |
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public: |
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plTimedInterp(); |
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plTimedInterp(const T& t); |
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const T& Set(const T& val) { return SetTarget(val, 0, 0); } |
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const T& SetTarget(const T& targ, double start, double duration); |
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const T& Update(double t); |
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operator T() const { return fCurr; } |
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const T& Value() const { return fCurr; } |
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}; |
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template <class T> |
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plTimedInterp<T>::plTimedInterp() |
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: fDuration(0), |
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fEnd(0) |
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{ |
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} |
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template <class T> |
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plTimedInterp<T>::plTimedInterp(const T& t) |
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: fInit(t), |
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fCurr(t), |
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fTarg(t), |
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fDuration(0), |
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fEnd(0) |
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{ |
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} |
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template <class T> |
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const T& |
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plTimedInterp<T>::Update(double t) |
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{ |
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if( fDuration <= 0 ) |
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return IEnd(); |
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hsScalar parm = hsScalar((fEnd - t) / fDuration); |
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if( parm <= 0 ) |
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return IEnd(); |
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else if( parm >= 1.f ) |
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return IBegin(); |
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return IEval(parm); |
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} |
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template <class T> |
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const T& |
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plTimedInterp<T>::SetTarget(const T& targ, double start, double dur) |
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{ |
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fEnd = start + dur; |
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fDuration = dur; |
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fTarg = targ; |
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if( dur <= 0 ) |
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fCurr = targ; |
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fInit = fCurr; |
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return fCurr; |
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} |
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template <class T> |
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const T& |
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plTimedInterp<T>::IEnd() |
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{ |
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fDuration = 0; |
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fCurr = fTarg; |
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return fCurr; |
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} |
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template <class T> |
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const T& |
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plTimedInterp<T>::IBegin() |
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{ |
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return fCurr; |
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} |
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template <class T> |
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const T& |
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plTimedInterp<T>::IEval(hsScalar parm) |
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{ |
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fCurr = fInit; |
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fCurr -= fTarg; |
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fCurr *= parm; |
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fCurr += fTarg; |
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return fCurr; |
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} |
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#endif // plTimedInterp_inc |
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