/*==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 hsSfxDistShade_inc
#define hsSfxDistShade_inc

#include "hsBiExpander.h"
#include "hsGRenderProcs.h"

class hsSfxDistShade : public hsGRenderProcs {
public:
    enum {
        kShadeConstant      = 0x10000
    };

    struct hsSfxDfTableEntry {
        hsScalar            fDistDel;
        hsScalar            fDistNorm;
        hsScalar            fShade;
    };
protected:

    hsScalar                            fMinDist;
    hsScalar                            fMaxDist;

    hsScalar                            fConstShade;

    hsScalar                            fMinIdle;
    hsScalar                            fMaxIdle;

    hsExpander<hsSfxDfTableEntry>       fTable;

    void        IConstShadeVerts(hsExpander<hsGShadeVertex*>& vList);
    void        ICalcShadeVerts(hsExpander<hsGShadeVertex*>& vList);
    hsScalar    IShadeFromDist(hsScalar dist);
public:
    hsSfxDistShade();
    virtual ~hsSfxDistShade();

    virtual hsBool32 BeginObject(plPipeline* pipe, plDrawable* obj);

    virtual void ProcessPreInterpShadeVerts(hsExpander<hsGShadeVertex*>& vList);

    void MakeTable(float* distList, float* shadeList, int num); // lists sorted from lowest cosine to highest

    virtual void Read(hsStream* s);
    virtual void Write(hsStream* s);

    virtual const char* GetLabel() const { return "hsSfxDistShade"; }

    virtual ProcType GetType() const { return kTypeDistShade; }

    CLASSNAME_REGISTER( hsSfxDistShade );
    GETINTERFACE_ANY( hsSfxDistShade, hsGRenderProcs );

};

#endif // hsSfxDistShade_inc