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/**
* @file llvograss.h
* @brief Description of LLVOGrass class
*
* $LicenseInfo:firstyear=2001&license=viewerlgpl$
* 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_LLVOGRASS_H
#define LL_LLVOGRASS_H
#include "llviewerobject.h"
#include <map>
class LLSurfacePatch;
class LLViewerTexture;
class LLVOGrass : public LLAlphaObject
{
public:
LLVOGrass(const LLUUID &id, const LLPCode pcode, LLViewerRegion *regionp);
// Initialize data that's only inited once per class.
static void initClass();
static void cleanupClass();
virtual U32 getPartitionType() const;
/*virtual*/ U32 processUpdateMessage(LLMessageSystem *mesgsys,
void **user_data,
U32 block_num,
const EObjectUpdateType update_type,
LLDataPacker *dp);
static void import(LLFILE *file, LLMessageSystem *mesgsys, const LLVector3 &pos);
/*virtual*/ void exportFile(LLFILE *file, const LLVector3 &position);
void updateDrawable(BOOL force_damped);
/*virtual*/ LLDrawable* createDrawable(LLPipeline *pipeline);
/*virtual*/ BOOL updateGeometry(LLDrawable *drawable);
/*virtual*/ 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) { }
/*virtual*/ void updateTextures();
/*virtual*/ BOOL updateLOD();
/*virtual*/ void setPixelAreaAndAngle(LLAgent &agent); // generate accurate apparent angle and area
void plantBlades();
/*virtual*/ BOOL isActive() const; // Whether this object needs to do an idleUpdate.
/*virtual*/ void idleUpdate(LLAgent &agent, LLWorld &world, const F64 &time);
/*virtual*/ BOOL lineSegmentIntersect(const LLVector4a& start, const LLVector4a& end,
S32 face = -1, // which face to check, -1 = ALL_SIDES
BOOL pick_transparent = FALSE,
S32* face_hit = NULL, // which face was hit
LLVector4a* intersection = NULL, // return the intersection point
LLVector2* tex_coord = NULL, // return the texture coordinates of the intersection point
LLVector4a* normal = NULL, // return the surface normal at the intersection point
LLVector4a* tangent = NULL // return the surface tangent at the intersection point
);
static S32 sMaxGrassSpecies;
struct GrassSpeciesData
{
LLUUID mTextureID;
F32 mBladeSizeX;
F32 mBladeSizeY;
};
typedef std::map<U32, GrassSpeciesData*> SpeciesMap;
U8 mSpecies; // Species of grass
F32 mBladeSizeX;
F32 mBladeSizeY;
LLSurfacePatch *mPatch; // Stores the land patch where the grass is centered
U64 mLastPatchUpdateTime;
LLVector3 mGrassBend; // Accumulated wind (used for blowing trees)
LLVector3 mGrassVel;
LLVector3 mWind;
F32 mBladeWindAngle;
F32 mBWAOverlap;
protected:
~LLVOGrass();
private:
void updateSpecies();
F32 mLastHeight; // For cheap update hack
S32 mNumBlades;
static SpeciesMap sSpeciesTable;
};
#endif // LL_VO_GRASS_
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