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/**
* @file llvolumemgr.h
* @brief LLVolumeMgr class.
*
* $LicenseInfo:firstyear=2002&license=viewergpl$
*
* Copyright (c) 2002-2008, Linden Research, Inc.
*
* Second Life Viewer Source Code
* The source code in this file ("Source Code") is provided by Linden Lab
* to you under the terms of the GNU General Public License, version 2.0
* ("GPL"), unless you have obtained a separate licensing agreement
* ("Other License"), formally executed by you and Linden Lab. Terms of
* the GPL can be found in doc/GPL-license.txt in this distribution, or
* online at http://secondlifegrid.net/programs/open_source/licensing/gplv2
*
* There are special exceptions to the terms and conditions of the GPL as
* it is applied to this Source Code. View the full text of the exception
* in the file doc/FLOSS-exception.txt in this software distribution, or
* online at http://secondlifegrid.net/programs/open_source/licensing/flossexception
*
* By copying, modifying or distributing this software, you acknowledge
* that you have read and understood your obligations described above,
* and agree to abide by those obligations.
*
* ALL LINDEN LAB SOURCE CODE IS PROVIDED "AS IS." LINDEN LAB MAKES NO
* WARRANTIES, EXPRESS, IMPLIED OR OTHERWISE, REGARDING ITS ACCURACY,
* COMPLETENESS OR PERFORMANCE.
* $/LicenseInfo$
*/
#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
{
LOG_CLASS(LLVolumeLODGroup);
public:
enum
{
NUM_LODS = 4
};
LLVolumeLODGroup(const LLVolumeParams ¶ms);
~LLVolumeLODGroup();
bool cleanupRefs();
static S32 getDetailFromTan(const F32 tan_angle);
static void getDetailProximity(const F32 tan_angle, F32 &to_lower, F32& to_higher);
static F32 getVolumeScaleFromDetail(const S32 detail);
LLVolume* getLODVolume(const S32 detail);
BOOL derefLOD(LLVolume *volumep);
S32 getNumRefs() const { return mRefs; }
const LLVolumeParams* getVolumeParams() const { return &mVolumeParams; };
F32 dump();
friend std::ostream& operator<<(std::ostream& s, const LLVolumeLODGroup& volgroup);
protected:
LLVolumeParams mVolumeParams;
S32 mRefs;
S32 mLODRefs[NUM_LODS];
LLPointer<LLVolume> mVolumeLODs[NUM_LODS];
static F32 mDetailThresholds[NUM_LODS];
static F32 mDetailScales[NUM_LODS];
S32 mAccessCount[NUM_LODS];
};
class LLVolumeMgr
{
public:
LLVolumeMgr();
virtual ~LLVolumeMgr();
BOOL cleanup(); // Cleanup all volumes being managed, returns TRUE if no dangling references
virtual LLVolumeLODGroup* getGroup( const LLVolumeParams& volume_params ) const;
// whatever calls getVolume() never owns the LLVolume* and
// cannot keep references for long since it may be deleted
// later. For best results hold it in an LLPointer<LLVolume>.
LLVolume *refVolume(const LLVolumeParams &volume_params, const S32 detail);
void unrefVolume(LLVolume *volumep);
void dump();
// manually call this for mutex magic
void useMutex();
friend std::ostream& operator<<(std::ostream& s, const LLVolumeMgr& volume_mgr);
protected:
void insertGroup(LLVolumeLODGroup* volgroup);
// Overridden in llphysics/abstract/utils/llphysicsvolumemanager.h
virtual LLVolumeLODGroup* createNewGroup(const LLVolumeParams& volume_params);
protected:
typedef std::map<const LLVolumeParams*, LLVolumeLODGroup*, LLVolumeParams::compare> volume_lod_group_map_t;
volume_lod_group_map_t mVolumeLODGroups;
LLMutex* mDataMutex;
};
#endif // LL_LLVOLUMEMGR_H
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