CWE-ou-minkata/Sources/Plasma/PubUtilLib/plPipeline/plFogEnvironment.h

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*==LICENSE==*/
//////////////////////////////////////////////////////////////////////////////
//                                                                          //
//  plFogEnvironment.h - Header file for the fog environment class          //
//                                                                          //
//////////////////////////////////////////////////////////////////////////////

#ifndef _plFogEnvironment_h
#define _plFogEnvironment_h

#include "pnKeyedObject/hsKeyedObject.h"
#include "hsTypes.h"
#include "hsColorRGBA.h"
#include "hsTemplates.h"
#include "hsUtils.h"


//// plFogEnvironment Class Definition ////////////////////////////////////////////
//  Defines a fog environment. Bite me.

class plFogEnvironment : public hsKeyedObject
{
    protected:

        UInt8       fType;
        hsScalar    fStart;         // Used for linear fog only
        hsScalar    fEnd, fDensity; // Always used!
        hsColorRGBA fColor;

    public:

        CLASSNAME_REGISTER( plFogEnvironment );
        GETINTERFACE_ANY( plFogEnvironment, hsKeyedObject );

        enum FogType
        {
            kLinearFog      = 0,
            kExpFog,
            kExp2Fog,
            kNoFog
        };

        plFogEnvironment();
        plFogEnvironment( hsScalar start, hsScalar end, hsScalar density, hsColorRGBA &color );
        plFogEnvironment( FogType type, hsScalar end, hsScalar density, hsColorRGBA &color );
        ~plFogEnvironment();

        // Sets the parameters for linear fog
        void    Set( hsScalar start, hsScalar end, hsScalar density, const hsColorRGBA *color = nil );

        // Sets the parameters for exp or exp^2 fog
        void    SetExp( FogType type, hsScalar end, hsScalar density, const hsColorRGBA *color = nil );

        // Sets the color
        void    SetColor( hsColorRGBA &color ) { fColor = color; }

        // Clear the environment to no fog
        void    Clear( void ) { fType = kNoFog; }

        // Gets the type
        UInt8   GetType( void ) { return fType; }

        // Gets the color
        hsColorRGBA &GetColor( void ) { return fColor; }

        // Gets the parameters. Sets start to 0 if the type is not linear (can be nil)
        void    GetParameters( hsScalar *start, hsScalar *end, hsScalar *density, hsColorRGBA *color );

        // Gets linear pipeline (DX) specific parameters.
        void    GetPipelineParams( hsScalar *start, hsScalar *end, hsColorRGBA *color );

        // Gets exp or exp^2 pipeline (DX) specific parameters.
        void    GetPipelineParams( hsScalar *density, hsColorRGBA *color );

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

#endif //_plFogEnvironment_h