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1/**
2 * @file llvograss.h
3 * @brief Description of LLVOGrass class
4 *
5 * Copyright (c) 2001-2007, Linden Research, Inc.
6 *
7 * The source code in this file ("Source Code") is provided by Linden Lab
8 * to you under the terms of the GNU General Public License, version 2.0
9 * ("GPL"), unless you have obtained a separate licensing agreement
10 * ("Other License"), formally executed by you and Linden Lab. Terms of
11 * the GPL can be found in doc/GPL-license.txt in this distribution, or
12 * online at http://secondlife.com/developers/opensource/gplv2
13 *
14 * There are special exceptions to the terms and conditions of the GPL as
15 * it is applied to this Source Code. View the full text of the exception
16 * in the file doc/FLOSS-exception.txt in this software distribution, or
17 * online at http://secondlife.com/developers/opensource/flossexception
18 *
19 * By copying, modifying or distributing this software, you acknowledge
20 * that you have read and understood your obligations described above,
21 * and agree to abide by those obligations.
22 *
23 * ALL LINDEN LAB SOURCE CODE IS PROVIDED "AS IS." LINDEN LAB MAKES NO
24 * WARRANTIES, EXPRESS, IMPLIED OR OTHERWISE, REGARDING ITS ACCURACY,
25 * COMPLETENESS OR PERFORMANCE.
26 */
27
28#ifndef LL_LLVOGRASS_H
29#define LL_LLVOGRASS_H
30
31#include "llviewerobject.h"
32#include "lldarray.h"
33#include <map>
34
35class LLSurfacePatch;
36class LLViewerImage;
37
38
39class LLVOGrass : public LLViewerObject
40{
41public:
42 LLVOGrass(const LLUUID &id, const LLPCode pcode, LLViewerRegion *regionp);
43 virtual ~LLVOGrass();
44
45 // Initialize data that's only inited once per class.
46 static void initClass();
47 static void cleanupClass();
48
49 /*virtual*/ U32 processUpdateMessage(LLMessageSystem *mesgsys,
50 void **user_data,
51 U32 block_num,
52 const EObjectUpdateType update_type,
53 LLDataPacker *dp);
54 static void import(FILE *file, LLMessageSystem *mesgsys, const LLVector3 &pos);
55 /*virtual*/ void exportFile(FILE *file, const LLVector3 &position);
56
57
58 /*virtual*/ LLDrawable* createDrawable(LLPipeline *pipeline);
59 /*virtual*/ BOOL updateGeometry(LLDrawable *drawable);
60
61 /*virtual*/ void updateTextures(LLAgent &agent);
62 /*virtual*/ BOOL updateLOD();
63 /*virtual*/ void setPixelAreaAndAngle(LLAgent &agent); // generate accurate apparent angle and area
64
65 void plantBlades();
66
67 /*virtual*/ BOOL isActive() const; // Whether this object needs to do an idleUpdate.
68 BOOL idleUpdate(LLAgent &agent, LLWorld &world, const F64 &time);
69
70 static S32 sMaxGrassSpecies;
71
72 struct GrassSpeciesData
73 {
74 LLUUID mTextureID;
75
76 F32 mBladeSizeX;
77 F32 mBladeSizeY;
78 };
79
80 typedef std::map<U32, GrassSpeciesData*> SpeciesMap;
81
82 U8 mSpecies; // Species of grass
83 F32 mBladeSizeX;
84 F32 mBladeSizeY;
85
86 LLSurfacePatch *mPatch; // Stores the land patch where the grass is centered
87
88 U64 mLastPatchUpdateTime;
89
90 LLVector3 mGrassBend; // Accumulated wind (used for blowing trees)
91 LLVector3 mGrassVel;
92 LLVector3 mWind;
93 F32 mBladeWindAngle;
94 F32 mBWAOverlap;
95
96private:
97 void updateSpecies();
98 F32 mLastHeight; // For cheap update hack
99 S32 mNumBlades;
100
101 static SpeciesMap sSpeciesTable;
102};
103#endif // LL_VO_GRASS_