llsky.h

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#ifndef LL_LLSKY_H
#define LL_LLSKY_H

#include "llmath.h"
//#include "vmath.h"
#include "v3math.h"
#include "v4math.h"
#include "v4color.h"
#include "v4coloru.h"
#include "llvosky.h"
#include "llvostars.h"
#include "llvoground.h"

const F32 NIGHTTIME_ELEVATION                   = -8.0f;        // degrees
const F32 NIGHTTIME_ELEVATION_COS               = (F32)sin(NIGHTTIME_ELEVATION*DEG_TO_RAD);

class LLViewerCamera;


class LLSky  
{
public:
        LLSky();
        ~LLSky();

        void init(const LLVector3 &sun_direction);
        void free();

        void cleanup();

        void setOverrideSun(BOOL override);
        BOOL getOverrideSun() { return mOverrideSimSunPosition; }
        void setSunDirection(const LLVector3 &sun_direction, const LLVector3 &sun_ang_velocity);
        void setSunTargetDirection(const LLVector3 &sun_direction, const LLVector3 &sun_ang_velocity);


        LLColor4 getFogColor() const;


        void setCloudDensityAtAgent(F32 cloud_density);
        void setWind(const LLVector3& wind);

        void updateFog(const F32 distance);
        void updateCull();
        void updateSky();

        void propagateHeavenlyBodies(F32 dt);                                   // dt = seconds

        S32  mLightingGeneration;
        BOOL mUpdatedThisFrame;

        void setFogRatio(const F32 fog_ratio);          // Fog distance as fraction of cull distance.
        F32 getFogRatio() const;
        LLColor4U getFadeColor() const;

        LLVector3 getSunDirection() const;
        LLVector3 getMoonDirection() const;
        LLColor4 getSunDiffuseColor() const;
        LLColor4 getMoonDiffuseColor() const;
        LLColor4 getTotalAmbientColor() const;
        BOOL sunUp() const;
        LLColor4 calcInScatter(LLColor4& transp, const LLVector3 &point, F32 exag) const;

        F32 getSunPhase() const;
        void setSunPhase(const F32 phase);

        void destroyGL();
        void restoreGL();

public:
        LLPointer<LLVOSky>              mVOSkyp;        // Pointer to the LLVOSky object (only one, ever!)
        LLPointer<LLVOStars>    mVOStarsp;      // Pointer to the LLVOStars object (only one, ever!)
        LLPointer<LLVOGround>   mVOGroundp;

        LLVector3 mSunTargDir;

        // Legacy stuff
        LLVector3 mSunDefaultPosition;

protected:
        BOOL                    mOverrideSimSunPosition;

        F32                             mSunPhase;
        LLColor4                mFogColor;                              // Color to use for fog and haze

        F32                             mHaze;                                  // a multiplier to scale the lighting
        F32                             mDomeRadius;                    // sky dome size

        LLVector3               mLastSunDirection;
};

extern LLSky    gSky;
#endif

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