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/**
 * @file llvopartgroup.h
 * @brief Group of particle systems
 *
 * $LicenseInfo:firstyear=2001&license=viewerlgpl$
 * Second Life Viewer Source Code
 * Copyright (C) 2010, Linden Research, Inc.
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation;
 * version 2.1 of the License only.
 *
 * This library 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
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
 *
 * Linden Research, Inc., 945 Battery Street, San Francisco, CA  94111  USA
 * $/LicenseInfo$
 */

#ifndef LL_LLVOPARTGROUP_H
#define LL_LLVOPARTGROUP_H

#include "llviewerobject.h"
#include "v3math.h"
#include "v3color.h"
#include "llframetimer.h"
#include "llviewerpartsim.h"
#include "llvertexbuffer.h"

class LLViewerPartGroup;

class LLVOPartGroup : public LLAlphaObject
{
public:

    static void initClass();
    static void restoreGL();
    static void destroyGL();

    enum
    {
        VERTEX_DATA_MASK =  LLVertexBuffer::MAP_VERTEX |
                            LLVertexBuffer::MAP_NORMAL |
                            LLVertexBuffer::MAP_TEXCOORD0 |
                            LLVertexBuffer::MAP_COLOR |
                            LLVertexBuffer::MAP_EMISSIVE |
                            LLVertexBuffer::MAP_TEXTURE_INDEX
    };

    LLVOPartGroup(const LLUUID &id, const LLPCode pcode, LLViewerRegion *regionp);

    /*virtual*/ BOOL    isActive() const; // Whether this object needs to do an idleUpdate.
    void idleUpdate(LLAgent &agent, const F64 &time);

    virtual F32 getBinRadius();
    virtual void updateSpatialExtents(LLVector4a& newMin, LLVector4a& newMax);
    virtual U32 getPartitionType() const;

    /*virtual*/ BOOL lineSegmentIntersect(const LLVector4a& start, const LLVector4a& end,
                                          S32 face,
                                          BOOL pick_transparent,
                                          BOOL pick_rigged,
                                          BOOL pick_unselectable,
                                          S32* face_hit,
                                          LLVector4a* intersection,
                                          LLVector2* tex_coord,
                                          LLVector4a* normal,
                                          LLVector4a* tangent);

    /*virtual*/ void setPixelAreaAndAngle(LLAgent &agent);
    /*virtual*/ void updateTextures();

    /*virtual*/ LLDrawable* createDrawable(LLPipeline *pipeline);
    /*virtual*/ BOOL        updateGeometry(LLDrawable *drawable);
    void        getGeometry(const LLViewerPart& part,
                                LLStrider<LLVector4a>& verticesp);

                void        getGeometry(S32 idx,
                                LLStrider<LLVector4a>& verticesp,
                                LLStrider<LLVector3>& normalsp,
                                LLStrider<LLVector2>& texcoordsp,
                                LLStrider<LLColor4U>& colorsp,
                                LLStrider<LLColor4U>& emissivep,
                                LLStrider<U16>& indicesp);

    void updateFaceSize(S32 idx) { }
    F32 getPartSize(S32 idx);
    void getBlendFunc(S32 idx, LLRender::eBlendFactor& src, LLRender::eBlendFactor& dst);
    LLUUID getPartOwner(S32 idx);
    LLUUID getPartSource(S32 idx);

    void setViewerPartGroup(LLViewerPartGroup *part_groupp)     { mViewerPartGroupp = part_groupp; }
    LLViewerPartGroup* getViewerPartGroup() { return mViewerPartGroupp; }

protected:
    ~LLVOPartGroup();

    LLViewerPartGroup *mViewerPartGroupp;

    virtual LLVector3 getCameraPosition() const;

};


class LLVOHUDPartGroup : public LLVOPartGroup
{
public:
    LLVOHUDPartGroup(const LLUUID &id, const LLPCode pcode, LLViewerRegion *regionp) :
      LLVOPartGroup(id, pcode, regionp)
    {
    }
protected:
    LLDrawable* createDrawable(LLPipeline *pipeline);
    U32 getPartitionType() const;
    virtual LLVector3 getCameraPosition() const;
};

#endif // LL_LLVOPARTGROUP_H