/*==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/>.

Additional permissions under GNU GPL version 3 section 7

If you modify this Program, or any covered work, by linking or
combining it with any of RAD Game Tools Bink SDK, Autodesk 3ds Max SDK,
NVIDIA PhysX SDK, Microsoft DirectX SDK, OpenSSL library, Independent
JPEG Group JPEG library, Microsoft Windows Media SDK, or Apple QuickTime SDK
(or a modified version of those libraries),
containing parts covered by the terms of the Bink SDK EULA, 3ds Max EULA,
PhysX SDK EULA, DirectX SDK EULA, OpenSSL and SSLeay licenses, IJG
JPEG Library README, Windows Media SDK EULA, or QuickTime SDK EULA, the
licensors of this Program grant you additional
permission to convey the resulting work. Corresponding Source for a
non-source form of such a combination shall include the source code for
the parts of OpenSSL and IJG JPEG Library used as well as that of the covered
work.

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 hsOscillator_inc
#define hsOscillator_inc

#include "hsPerterber.h"
#include "hsTemplates.h"

#include "hsGeometry3.h"
#include "../plIntersect/hsBounds.h"

class hsStream;
class plPipeline;

class hsWave
{
protected:
    hsPoint3            fWorldCenter;
    hsPoint3            fLocalCenter;

    hsScalar            fWorldFrequency; // 1.0 / Period
    hsScalar            fLocalFrequency;

    hsScalar            fWorldAmplitude;
    hsScalar            fLocalAmplitude;

    hsScalar            fPhase;
    hsScalar            fRate; // how long a crest takes to reach next crest

    hsScalar            fStartSecs;
    hsScalar            fSecsToLive;

    hsScalar            fInnerRadius;
    hsScalar            fOuterRadius;
    hsScalar            fAttenuateOutScale;

    hsScalar            AgeScale(hsScalar secs) const;

public:
    void                Accumulate(const hsPoint3& pos, const hsVector3& localZ, hsVector3& accum, hsVector3& accumNorm) const;
    hsScalar            ScaledAmplitude(hsScalar secs) const;

    void                Init(hsScalar secs, hsPoint3& center, hsScalar per, hsScalar amp, hsScalar rate, hsScalar life, hsBool32 attenOut=false);
    
    void                Update(hsScalar secs, const hsMatrix44& l2w, const hsMatrix44& w2l);
    hsBool32            IsSpent(hsScalar secs) const;
    void                Kill() { fStartSecs = fSecsToLive = 0; }
    void                AttenuateOut(hsBool32 on) { fAttenuateOutScale = (on ? 1.f : 0); }
    hsBool32            GetAttenuateOut() { return fAttenuateOutScale > 0; }

    void                Save(hsStream* s, hsScalar secs);
    void                Load(hsStream* s, hsScalar secs);
};

class hsOscillator : public hsPerterber
{
protected:
    hsTArray<hsWave>    fWaves;
    hsTArray<hsWave>    fTempWaves;

    hsMatrix44      fLocalToWorld;
    hsMatrix44      fWorldToLocal;

    hsPoint3        fWorldCenter;
    hsPoint3        fLocalCenter;

    hsVector3       fWorldAttenScale;
    hsVector3       fLocalAttenScale;
    
    hsBounds3Ext    fWorldCenterBounds;

    hsScalar        fMinPeriod;
    hsScalar        fMaxPeriod;

    hsScalar        fMinAmplitude;
    hsScalar        fMaxAmplitude;

    hsScalar        fMinRate;
    hsScalar        fMaxRate;

    hsScalar        fMinLife;
    hsScalar        fMaxLife;

    hsVector3       fLocalX;
    hsVector3       fLocalY;
    hsVector3       fLocalZ;

    hsScalar            IAttenuate(const hsPoint3& in) const;
    void            ISpawnWave(hsScalar secs, int i);

    virtual void IUpdate(hsScalar secs, plPipeline* pipe, const hsMatrix44& l2w, const hsMatrix44& w2l);

    virtual void IPerterb(const hsPoint3& in, hsGVertex3& out) const;
public:
    hsOscillator();
    virtual ~hsOscillator();

    virtual void AdjustWorldBounds(const hsMatrix44& l2w, const hsMatrix44& w2l, hsBounds3Ext& bnd) const;

    virtual uint32_t GetType() const { return kTypeOscillator; }

    // Don't call these, use base class LabelAndWrite() and CreateAndRead()
    virtual void Read(hsStream* s);
    virtual void Write(hsStream* s);

    virtual void Load(hsStream* s, hsScalar secs);
    virtual void Save(hsStream* s, hsScalar secs);

    void SetPeriodRange(hsScalar lo, hsScalar hi) { fMinPeriod = lo; fMaxPeriod = hi; }
    void SetAmplitudeRange(hsScalar lo, hsScalar hi) { fMinAmplitude = lo; fMaxAmplitude = hi; }
    void SetRateRange(hsScalar lo, hsScalar hi) { fMinRate = lo; fMaxRate = hi; }
    void SetLifeRange(hsScalar lo, hsScalar hi) { fMinLife = lo; fMaxLife = hi; }

    hsScalar GetMinPeriod() const { return fMinPeriod; }
    hsScalar GetMaxPeriod() const { return fMaxPeriod; }
    hsScalar GetMinAmplitude() const { return fMinAmplitude; }
    hsScalar GetMaxAmplitude() const { return fMaxAmplitude; }
    hsScalar GetMinRate() const { return fMinRate; }
    hsScalar GetMaxRate() const { return fMaxRate; }
    hsScalar GetMinLife() const { return fMinLife; }
    hsScalar GetMaxLife() const { return fMaxLife; }

    void SetWorldAttenScale(const hsVector3& s) { fWorldAttenScale = s; }
    void SetWorldCenterBounds(const hsBounds3Ext& bnd) { fWorldCenterBounds = bnd; }

    const hsVector3& GetWorldAttenScale() const { return fWorldAttenScale; }
    const hsBounds3Ext& GetWorldCenterBounds() const { return fWorldCenterBounds; }

    void    SetNumWaves(int n);
    uint32_t  GetNumWaves() const { return fWaves.GetCount(); }
    hsWave& GetWeakestWave(hsScalar secs);
    hsWave& GetTempWave(hsScalar secs);

    virtual void Init(int32_t nParams, hsScalar* params);

    static hsGTriMesh* MakeWaveMesh(int nSpokes, const hsPoint3& center, hsScalar minRad, hsScalar maxRad, hsScalar uRange, hsScalar vRange, hsScalar attenStartFrac, hsBool32 stitch);

};

#endif // hsOscillator_inc
