/*==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 PLSCALARCHANNEL_INC
#define PLSCALARCHANNEL_INC

/////////////////////////////////////////////////////////////////////////////////////////
//
// INCLUDES
//
/////////////////////////////////////////////////////////////////////////////////////////
// base
#include "plAGChannel.h"
#include "plAGApplicator.h"

/////////////////////////////////////////////////////////////////////////////////////////
//
// FORWARDS
//
/////////////////////////////////////////////////////////////////////////////////////////
class plController;
class plAnimTimeConvert;
class plSimpleStateVariable;
class plControllerCacheInfo;

/////////////////////////////////////////////////////////////////////////////////////////
//
// DEFINITIONS
//
/////////////////////////////////////////////////////////////////////////////////////////

//////////////////
// PLSCALARCHANNEL
//////////////////
// an animation channel that outputs a scalar value
class plScalarChannel : public plAGChannel
{
protected:
    hsScalar fResult;

public:
    plScalarChannel();
    virtual ~plScalarChannel();

    // AG PROTOCOL
    virtual const hsScalar & Value(double time, hsBool peek = false);
    virtual void Value(hsScalar &result, double time, hsBool peek = false);

    // combine it (allocates combine object)
    virtual plAGChannel * MakeCombine(plAGChannel * channelB);

    // blend it (allocates blend object)
    virtual plAGChannel * MakeBlend(plAGChannel * channelB, plScalarChannel * channelBias, int blendPriority);

    // const eval at time zero
    virtual plAGChannel * MakeZeroState();
    
    // make a timeScale instance
    virtual plAGChannel * MakeTimeScale(plScalarChannel *timeSource);

    // PLASMA PROTOCOL
    CLASSNAME_REGISTER( plScalarChannel );
    GETINTERFACE_ANY( plScalarChannel, plAGChannel );
};

///////////////////
// PLSCALARCONSTANT
///////////////////
// A scalar source that just keeps handing out the same value
class plScalarConstant : public plScalarChannel
{
public:
    plScalarConstant();
    plScalarConstant(hsScalar value);
    virtual ~plScalarConstant();

    void Set(hsScalar value) { fResult = value; }
    hsScalar Get() { return fResult; }

    // PLASMA PROTOCOL
    CLASSNAME_REGISTER( plScalarConstant );
    GETINTERFACE_ANY( plScalarConstant, plScalarChannel );

    void Read(hsStream *stream, hsResMgr *mgr);
    void Write(hsStream *stream, hsResMgr *mgr);
};


////////////////////
// PLSCALARTIMESCALE
////////////////////
// Adapts the time scale before passing it to the next channel in line.
// Use to instance animations while allowing each instance to run at different speeds.
class plScalarTimeScale : public plScalarChannel
{
protected:
    plScalarChannel *fTimeSource;
    plScalarChannel *fChannelIn;

public:
    plScalarTimeScale();
    plScalarTimeScale(plScalarChannel *channel, plScalarChannel *timeSource);
    virtual ~plScalarTimeScale();

    virtual hsBool IsStoppedAt(double time);
    virtual const hsScalar & Value(double time, hsBool peek = false);
    virtual plAGChannel * Detach(plAGChannel * channel);

    // PLASMA PROTOCOL
    CLASSNAME_REGISTER( plScalarTimeScale );
    GETINTERFACE_ANY( plScalarTimeScale, plScalarChannel );
};

////////////////
// PLSCALARBLEND
////////////////
// blends two scalars into one with weighting
class plScalarBlend : public plScalarChannel
{
protected:
    plScalarChannel * fChannelA;
    plScalarChannel * fChannelB;
    plScalarChannel * fChannelBias;
    
public:
    // xTORs
    plScalarBlend();
    plScalarBlend(plScalarChannel * channelA, plScalarChannel * channelB, plScalarChannel * channelBias);
    virtual ~plScalarBlend();

    // SPECIFICS
    const plScalarChannel * GetChannelA() const { return fChannelA; }
    void SetChannelA(plScalarChannel * channel) { fChannelA = channel; }

    const plScalarChannel * GetChannelB() const { return fChannelB; }
    void SetChannelB(plScalarChannel * channel) { fChannelB = channel; }

    const plScalarChannel * GetChannelBias() const { return fChannelBias; }
    void SetChannelBias(plScalarChannel * channel) { fChannelBias = channel; }

    virtual hsBool IsStoppedAt(double time);

    // AG PROTOCOL
    virtual const hsScalar & Value(double time, hsBool peek = false);
    
    // remove the specified channel from our graph
    virtual plAGChannel * Detach(plAGChannel * channel);
    
    // PLASMA PROTOCOL
    CLASSNAME_REGISTER( plScalarBlend );
    GETINTERFACE_ANY( plScalarBlend, plScalarChannel );
};

////////////////////////////
// PLSCALARCONTROLLERCHANNEL
////////////////////////////
// converts a plController-style animation into a plScalarChannel
class plScalarControllerChannel : public plScalarChannel
{
protected:
    plController *fController;
    
public:
    // xTORs
    plScalarControllerChannel();
    plScalarControllerChannel(plController *controller);
    virtual ~plScalarControllerChannel();
    
    // AG PROTOCOL
    virtual const hsScalar & Value(double time, hsBool peek = false);
    virtual const hsScalar & Value(double time, hsBool peek, plControllerCacheInfo *cache);
    
    virtual plAGChannel *MakeCacheChannel(plAnimTimeConvert *atc);
        
    // PLASMA PROTOCOL
    // rtti
    CLASSNAME_REGISTER( plScalarControllerChannel );
    GETINTERFACE_ANY( plScalarControllerChannel, plScalarChannel );
    
    // persistence
    virtual void Write(hsStream *stream, hsResMgr *mgr);
    virtual void Read(hsStream *s, hsResMgr *mgr);
};

/////////////////////////////////
// PLSCALARCONTROLLERCACHECHANNEL
/////////////////////////////////
// Same as plScalarController, but with caching info
class plScalarControllerCacheChannel : public plScalarChannel
{
protected:
    plControllerCacheInfo *fCache;
    plScalarControllerChannel *fControllerChannel;
    
public:
    plScalarControllerCacheChannel();
    plScalarControllerCacheChannel(plScalarControllerChannel *channel, plControllerCacheInfo *cache);
    virtual ~plScalarControllerCacheChannel();
    
    virtual const hsScalar & Value(double time, bool peek = false);
    
    virtual plAGChannel * Detach(plAGChannel * channel);
    
    // PLASMA PROTOCOL
    CLASSNAME_REGISTER( plScalarControllerCacheChannel );
    GETINTERFACE_ANY( plScalarControllerCacheChannel, plScalarChannel );
    
    // Created at runtime only, so no Read/Write
};

////////////////////
// PLATCChannel
////////////////////
// Channel interface for a plAnimTimeConvert object
class plATCChannel : public plScalarChannel
{
protected:
    plAnimTimeConvert *fConvert;

public:
    plATCChannel();
    plATCChannel(plAnimTimeConvert *convert);
    virtual ~plATCChannel();

    virtual hsBool IsStoppedAt(double time);
    virtual const hsScalar & Value(double time, hsBool peek = false);

    // PLASMA PROTOCOL
    CLASSNAME_REGISTER( plATCChannel );
    GETINTERFACE_ANY( plATCChannel, plScalarChannel );
};

////////////////////
// PLSCALARSDLCHANNEL
////////////////////
// Returns the value of an SDL scalar variable
class plScalarSDLChannel : public plScalarChannel
{
protected:
    plSimpleStateVariable *fVar;
    hsScalar fLength;

public:
    plScalarSDLChannel();
    plScalarSDLChannel(hsScalar length);
    virtual ~plScalarSDLChannel();

    virtual hsBool IsStoppedAt(double time);
    virtual const hsScalar & Value(double time, hsBool peek = false);

    void SetVar(plSimpleStateVariable *var) { fVar = var; }

    // PLASMA PROTOCOL
    CLASSNAME_REGISTER( plScalarSDLChannel );
    GETINTERFACE_ANY( plScalarSDLChannel, plScalarChannel );
};


////////////////////////////
// 
// Channel Applicator classes

class plScalarChannelApplicator : public plAGApplicator
{
protected:
    virtual void IApply(const plAGModifier *mod, double time);

public:
    CLASSNAME_REGISTER( plScalarChannelApplicator );
    GETINTERFACE_ANY( plScalarChannelApplicator, plAGApplicator );
};

class plSpotInnerApplicator : public plAGApplicator
{
protected:
    virtual void IApply(const plAGModifier *mod, double time);

public:
    CLASSNAME_REGISTER( plSpotInnerApplicator );
    GETINTERFACE_ANY( plSpotInnerApplicator, plAGApplicator );
};

class plSpotOuterApplicator : public plAGApplicator
{
protected:
    virtual void IApply(const plAGModifier *mod, double time);

public:
    CLASSNAME_REGISTER( plSpotOuterApplicator );
    GETINTERFACE_ANY( plSpotOuterApplicator, plAGApplicator );
};

class plOmniApplicator : public plAGApplicator
{
protected:
    virtual void IApply(const plAGModifier *mod, double time);

public:
    CLASSNAME_REGISTER( plOmniApplicator );
    GETINTERFACE_ANY( plOmniApplicator, plAGApplicator );
};

class plOmniSqApplicator : public plAGApplicator
{
protected:
    virtual void IApply(const plAGModifier *mod, double time);

public:
    CLASSNAME_REGISTER( plOmniSqApplicator );
    GETINTERFACE_ANY( plOmniSqApplicator, plAGApplicator );
};

class plOmniCutoffApplicator : public plAGApplicator
{
protected:
    virtual void IApply(const plAGModifier *mod, double time);

public:
    CLASSNAME_REGISTER( plOmniCutoffApplicator );
    GETINTERFACE_ANY( plOmniCutoffApplicator, plAGApplicator );
};


#endif