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171 lines
4.8 KiB
171 lines
4.8 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 plTimedValue_inc |
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#define plTimedValue_inc |
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#include "hsTimer.h" |
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class hsStream; |
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// plTimedValue |
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// To use, replace your member var of type T with plTimedValue<T>. |
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// You can then pretty much treat it as normal. To set it to interpolate |
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// to a new value over secs seconds, use Set(newVal, secs). |
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// For I/O, see plTimedSimple and plTimedCompound. |
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template <class T> class plTimedValue |
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{ |
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protected: |
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T fGoal; |
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T fInit; |
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double fStart; |
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hsScalar fInvSecs; |
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public: |
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plTimedValue() {} |
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plTimedValue(const plTimedValue<T>& o) { Set(o, 0.f); } |
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plTimedValue(const T& v) { Set(v, 0.f); } |
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plTimedValue<T>& operator=(const plTimedValue<T>& o) { return Set(o, 0.f); } |
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plTimedValue<T>& operator=(const T& v) { return Set(v, 0.f); } |
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plTimedValue<T>& Set(const T& v, hsScalar secs=0); |
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operator T () const { return Value(); } |
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T Value() const; |
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}; |
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// Read/Writable version of plTimedValue, for intrinsic types (e.g. int, float, bool). |
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// Must be a type that hsStream has an overloaded ReadSwap/WriteSwap defined. |
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template <class T> class plTimedSimple : public plTimedValue<T> |
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{ |
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public: |
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plTimedSimple<T>& operator=(const plTimedValue<T>& o) { return Set(o, 0.f); } |
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plTimedSimple<T>& operator=(const T& v) { return Set(v, 0.f); } |
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plTimedSimple<T>& Set(const T& v, hsScalar secs=0) { plTimedValue<T>::Set(v, secs); return *this; } |
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void Read(hsStream* s); |
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void Write(hsStream* s) const; |
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}; |
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// Read/Writable version of plTimedValue, for compound types (e.g. hsVector3, hsColorRGBA). |
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// May be any type that has Read(hsStream*)/Write(hsStream*) defined. |
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template <class T> class plTimedCompound : public plTimedValue<T> |
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{ |
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public: |
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plTimedCompound<T>& operator=(const plTimedValue<T>& o) { return Set(o, 0.f); } |
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plTimedCompound<T>& operator=(const T& v) { return Set(v, 0.f); } |
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plTimedCompound<T>& Set(const T& v, hsScalar secs=0) { plTimedValue<T>::Set(v, secs); return *this; } |
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void Read(hsStream* s); |
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void Write(hsStream* s) const; |
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}; |
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template <class T> |
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plTimedValue<T>& plTimedValue<T>::Set(const T& v, hsScalar secs) |
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{ |
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if( secs <= 0 ) |
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{ |
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fGoal = fInit = v; |
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fInvSecs = 0; |
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} |
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else |
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{ |
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fInit = Value(); |
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fStart = hsTimer::GetSysSeconds(); |
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fInvSecs = 1.f / secs; |
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fGoal = v; |
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} |
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return *this; |
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} |
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template <class T> |
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T plTimedValue<T>::Value() const |
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{ |
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if( fInvSecs > 0 ) |
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{ |
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hsScalar t = (hsScalar)((hsTimer::GetSysSeconds() - fStart) * fInvSecs); |
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hsAssert(t >= 0, "Moving back in time"); |
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if( t < 1.f ) |
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return fGoal * t + fInit * (1.f - t); |
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} |
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return fGoal; |
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} |
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template <class T> |
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void plTimedSimple<T>::Read(hsStream* s) |
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{ |
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T val; |
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s->ReadSwap(&val); |
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Set(val, 0.f); |
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} |
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template <class T> |
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void plTimedSimple<T>::Write(hsStream* s) const |
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{ |
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T val = Value(); |
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s->WriteSwap(val); |
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} |
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template <class T> |
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void plTimedCompound<T>::Read(hsStream* s) |
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{ |
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T val; |
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val.Read(s); |
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Set(val, 0.f); |
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} |
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template <class T> |
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void plTimedCompound<T>::Write(hsStream* s) const |
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{ |
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T val = Value(); |
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val.Write(s); |
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} |
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#endif // plTimedValue_inc
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