llvolumemgr.h

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#ifndef LL_LLVOLUMEMGR_H
#define LL_LLVOLUMEMGR_H

#include <map>

#include "llvolume.h"
#include "llmemory.h"
#include "llthread.h"

class LLVolumeParams;
class LLVolumeLODGroup;

class LLVolumeLODGroup : public LLThreadSafeRefCount
{
protected:
        ~LLVolumeLODGroup();
        
public:
        enum
        {
                NUM_LODS = 4
        };

        LLVolumeLODGroup(const LLVolumeParams &params);

        BOOL derefLOD(LLVolume *volumep);
        static S32 getDetailFromTan(const F32 tan_angle);
        static F32 getVolumeScaleFromDetail(const S32 detail);

        LLVolume *getLOD(const S32 detail);
        const LLVolumeParams &getParams() const { return mParams; };

        F32     dump();
        friend std::ostream& operator<<(std::ostream& s, const LLVolumeLODGroup& volgroup);

protected:
        LLVolumeParams mParams;

        S32 mLODRefs[NUM_LODS];
        LLVolume *mVolumeLODs[NUM_LODS];
        static F32 mDetailThresholds[NUM_LODS];
        static F32 mDetailScales[NUM_LODS];
        S32             mAccessCount[NUM_LODS];
};

class LLVolumeMgr
{
public:
        static void initClass();
        static BOOL cleanupClass();
        
public:
        LLVolumeMgr();
        ~LLVolumeMgr();
        BOOL cleanup();                 // Cleanup all volumes being managed, returns TRUE if no dangling references
        LLVolume *getVolume(const LLVolumeParams &volume_params, const S32 detail);
        void cleanupVolume(LLVolume *volumep);

        void dump();
        friend std::ostream& operator<<(std::ostream& s, const LLVolumeMgr& volume_mgr);

protected:
        typedef std::map<const LLVolumeParams*, LLVolumeLODGroup*, LLVolumeParams::compare> volume_lod_group_map_t;
        typedef volume_lod_group_map_t::const_iterator volume_lod_group_map_iter;
        volume_lod_group_map_t mVolumeLODGroups;

        LLMutex* mDataMutex;
        
//      S32 mNumVolumes;
};

extern LLVolumeMgr* gVolumeMgr;

#endif // LL_LLVOLUMEMGR_H

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