[1493] | 1 | #include "Ogre.h"
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| 2 |
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| 3 |
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| 4 | class Grass
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| 5 | {
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| 6 | protected:
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| 7 | StaticGeometry* mStaticGeom;
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| 8 | Real mGrassHeight;
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| 9 | Real mGrassWidth;
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| 10 | String mGrassMeshName;
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| 11 | String mGrassMaterial;
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| 12 | Real mOffsetParam;
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| 13 | SceneManager *mSceneMgr;
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| 14 | Real mHeightPosition;
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| 15 | Real mGrassFrequency;
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| 16 | Real mGrassInterFrequency;
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| 17 | Vector3 mGrassScaleRandomRangeMin;
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| 18 | Vector3 mGrassScaleRandomRangeMax;
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| 19 | Real mGrassLandscapeSizeX;
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| 20 | Real mGrassLandscapeSizeZ;
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| 21 | bool mShadowCaster;
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| 22 | bool mGrassShadowReceiver;
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| 23 |
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| 24 | public:
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| 25 | Grass()
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| 26 | {
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| 27 | mOffsetParam = 999;
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| 28 | mGrassMeshName = String("grassblades");
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| 29 | mGrassMaterial = String("Examples/GrassBlades");
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| 30 | mShadowCaster = false;
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| 31 | }
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| 32 |
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| 33 | void setGrassCastShadows(bool shadowCaster)
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| 34 | {
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| 35 | if (shadowCaster)
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| 36 | {
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| 37 | mStaticGeom->setCastShadows(true);
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| 38 | mShadowCaster = true;
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| 39 | }
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| 40 | else
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| 41 | {
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| 42 | mStaticGeom->setCastShadows(false);
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| 43 | mShadowCaster = false;
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| 44 | }
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| 45 | }
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| 46 |
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| 47 | void setGrassLandscapeSizeX(Real landscapeSizeX)
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| 48 | {
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| 49 | mGrassLandscapeSizeX = landscapeSizeX;
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| 50 | }
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| 51 |
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| 52 | void setGrassLandscapeSizeZ(Real landscapeSizeZ)
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| 53 | {
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| 54 | mGrassLandscapeSizeZ = landscapeSizeZ;
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| 55 | }
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| 56 |
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| 57 | Real getGrassLandscapeSizeX()
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| 58 | {
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| 59 | return mGrassLandscapeSizeX;
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| 60 | }
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| 61 |
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| 62 | Real getGrassLandscapeSizeZ()
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| 63 | {
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| 64 | return mGrassLandscapeSizeZ;
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| 65 | }
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| 66 |
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| 67 | void setGrassScaleRandomRangeMin(Vector3 scaleRRmin)
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| 68 | {
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| 69 | mGrassScaleRandomRangeMin = scaleRRmin;
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| 70 | }
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| 71 |
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| 72 | Vector3 getGrassScaleRandomRangeMin()
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| 73 | {
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| 74 | return mGrassScaleRandomRangeMin;
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| 75 | }
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| 76 |
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| 77 | void setGrassScaleRandomRangeMax(Vector3 scaleRRmax)
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| 78 | {
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| 79 | mGrassScaleRandomRangeMax = scaleRRmax;
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| 80 | }
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| 81 |
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| 82 | Vector3 getGrassScaleRandomRangeMax()
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| 83 | {
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| 84 | return mGrassScaleRandomRangeMax;
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| 85 | }
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| 86 |
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| 87 | void setGrassInterFrequency(Real interFrequency)
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| 88 | {
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| 89 | mGrassInterFrequency = interFrequency;
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| 90 | }
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| 91 |
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| 92 | Real getGrassInterFrequency()
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| 93 | {
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| 94 | return mGrassInterFrequency;
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| 95 | }
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| 96 |
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| 97 | void setGrassFrequency(Real frequency)
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| 98 | {
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| 99 | mGrassFrequency = frequency;
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| 100 | }
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| 101 |
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| 102 | Real getGrassFrequency()
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| 103 | {
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| 104 | return mGrassFrequency;
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| 105 | }
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| 106 |
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| 107 | void setGrassHeightPosition(Real heightPosition)
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| 108 | {
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| 109 | mHeightPosition = heightPosition;
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| 110 | }
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| 111 |
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| 112 | Real getGrassHeightPosition()
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| 113 | {
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| 114 | return mHeightPosition;
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| 115 | }
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| 116 |
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| 117 | void setSceneManager(SceneManager* sceneMgr)
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| 118 | {
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| 119 | mSceneMgr = sceneMgr;
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| 120 | }
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| 121 |
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| 122 | Real getGrassHeight()
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| 123 | {
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| 124 | return mGrassHeight;
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| 125 | }
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| 126 |
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| 127 | Real getGrassWidth()
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| 128 | {
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| 129 | return mGrassWidth;
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| 130 | }
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| 131 |
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| 132 | String getGrassMeshName()
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| 133 | {
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| 134 | return mGrassMeshName;
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| 135 | }
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| 136 |
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| 137 | String getGrassMaterial()
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| 138 | {
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| 139 | return mGrassMaterial;
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| 140 | }
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| 141 |
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| 142 | StaticGeometry* getStaticGeometry()
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| 143 | {
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| 144 | return mStaticGeom;
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| 145 | }
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| 146 |
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| 147 | void setGrassHeight(Real height)
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| 148 | {
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| 149 | mGrassHeight = height;
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| 150 | }
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| 151 |
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| 152 | void setGrassWidth(Real width)
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| 153 | {
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| 154 | mGrassWidth = width;
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| 155 | }
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| 156 |
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| 157 | void setGrassMeshName(String meshName)
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| 158 | {
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| 159 | mGrassMeshName = meshName;
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| 160 | }
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| 161 |
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| 162 | void setGrassMaterial(String material)
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| 163 | {
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| 164 | mGrassMaterial = material;
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| 165 | }
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| 166 |
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| 167 | void waveGrass(Real timeElapsed)
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| 168 | {
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| 169 | static Real xinc = Math::PI * 0.4;
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| 170 | static Real zinc = Math::PI * 0.55;
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| 171 | static Real xpos = Math::RangeRandom(-Math::PI, Math::PI);
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| 172 | static Real zpos = Math::RangeRandom(-Math::PI, Math::PI);
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| 173 |
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| 174 | xpos += xinc * timeElapsed;
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| 175 | zpos += zinc * timeElapsed;
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| 176 |
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| 177 | // Update vertex program parameters by binding a value to each renderable
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| 178 | static Vector4 offset(0,0,0,0);
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| 179 |
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| 180 | StaticGeometry::RegionIterator rit = mStaticGeom->getRegionIterator();
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| 181 | while (rit.hasMoreElements())
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| 182 | {
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| 183 | StaticGeometry::Region* reg = rit.getNext();
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| 184 |
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| 185 | // a little randomness
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| 186 | xpos += reg->getCentre().x * 0.001;
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| 187 | zpos += reg->getCentre().z * 0.001;
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| 188 | offset.x = Math::Sin(xpos) * 0.05;
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| 189 | offset.z = Math::Sin(zpos) * 0.05;
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| 190 |
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| 191 | StaticGeometry::Region::LODIterator lodit = reg->getLODIterator();
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| 192 | while (lodit.hasMoreElements())
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| 193 | {
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| 194 | StaticGeometry::LODBucket* lod = lodit.getNext();
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| 195 | StaticGeometry::LODBucket::MaterialIterator matit =
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| 196 | lod->getMaterialIterator();
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| 197 | while (matit.hasMoreElements())
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| 198 | {
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| 199 | StaticGeometry::MaterialBucket* mat = matit.getNext();
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| 200 | StaticGeometry::MaterialBucket::GeometryIterator geomit =
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| 201 | mat->getGeometryIterator();
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| 202 | while (geomit.hasMoreElements())
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| 203 | {
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| 204 | StaticGeometry::GeometryBucket* geom = geomit.getNext();
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| 205 | geom->setCustomParameter(mOffsetParam, offset);
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| 206 |
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| 207 | }
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| 208 | }
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| 209 | }
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| 210 | }
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| 211 | }
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| 212 |
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| 213 | void createGrassMesh()
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| 214 | {
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| 215 | // Each grass section is 3 planes at 60 degrees to each other
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| 216 | // Normals point straight up to simulate correct lighting
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| 217 | MeshPtr msh = MeshManager::getSingleton().createManual(mGrassMeshName,
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| 218 | ResourceGroupManager::DEFAULT_RESOURCE_GROUP_NAME);
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| 219 | SubMesh* sm = msh->createSubMesh();
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| 220 | sm->useSharedVertices = false;
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| 221 | sm->vertexData = new VertexData();
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| 222 | sm->vertexData->vertexStart = 0;
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| 223 | sm->vertexData->vertexCount = 12;
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| 224 | VertexDeclaration* dcl = sm->vertexData->vertexDeclaration;
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| 225 | size_t offset = 0;
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| 226 | dcl->addElement(0, offset, VET_FLOAT3, VES_POSITION);
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| 227 | offset += VertexElement::getTypeSize(VET_FLOAT3);
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| 228 | dcl->addElement(0, offset, VET_FLOAT3, VES_NORMAL);
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| 229 | offset += VertexElement::getTypeSize(VET_FLOAT3);
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| 230 | dcl->addElement(0, offset, VET_FLOAT2, VES_TEXTURE_COORDINATES);
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| 231 | offset += VertexElement::getTypeSize(VET_FLOAT2);
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| 232 |
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| 233 | HardwareVertexBufferSharedPtr vbuf = HardwareBufferManager::getSingleton()
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| 234 | .createVertexBuffer(
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| 235 | offset, 12, HardwareBuffer::HBU_STATIC_WRITE_ONLY);
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| 236 | float* pReal = static_cast<float*>(vbuf->lock(HardwareBuffer::HBL_DISCARD));
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| 237 | Vector3 baseVec(mGrassWidth/2, 0, 0);
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| 238 | Vector3 vec = baseVec;
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| 239 | Quaternion rot;
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| 240 | rot.FromAngleAxis(Degree(60), Vector3::UNIT_Y);
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| 241 | int i;
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| 242 | for (i = 0; i < 3; ++i)
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| 243 | {
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| 244 | // position
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| 245 | *pReal++ = -vec.x;
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| 246 | *pReal++ = mGrassHeight;
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| 247 | *pReal++ = -vec.z;
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| 248 | // normal
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| 249 | *pReal++ = 0;
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| 250 | *pReal++ = 1;
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| 251 | *pReal++ = 0;
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| 252 | // uv
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| 253 | *pReal++ = 0;
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| 254 | *pReal++ = 0;
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| 255 |
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| 256 | // position
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| 257 | *pReal++ = vec.x;
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| 258 | *pReal++ = mGrassHeight;
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| 259 | *pReal++ = vec.z;
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| 260 | // normal
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| 261 | *pReal++ = 0;
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| 262 | *pReal++ = 1;
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| 263 | *pReal++ = 0;
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| 264 | // uv
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| 265 | *pReal++ = 1;
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| 266 | *pReal++ = 0;
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| 267 |
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| 268 | // position
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| 269 | *pReal++ = -vec.x;
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| 270 | *pReal++ = 0;
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| 271 | *pReal++ = -vec.z;
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| 272 | // normal
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| 273 | *pReal++ = 0;
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| 274 | *pReal++ = 1;
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| 275 | *pReal++ = 0;
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| 276 | // uv
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| 277 | *pReal++ = 0;
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| 278 | *pReal++ = 1;
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| 279 |
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| 280 | // position
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| 281 | *pReal++ = vec.x;
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| 282 | *pReal++ = 0;
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| 283 | *pReal++ = vec.z;
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| 284 | // normal
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| 285 | *pReal++ = 0;
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| 286 | *pReal++ = 1;
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| 287 | *pReal++ = 0;
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| 288 | // uv
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| 289 | *pReal++ = 1;
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| 290 | *pReal++ = 1;
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| 291 |
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| 292 | vec = rot * vec;
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| 293 | }
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| 294 | vbuf->unlock();
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| 295 | sm->vertexData->vertexBufferBinding->setBinding(0, vbuf);
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| 296 | sm->indexData->indexCount = 6*3;
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| 297 | sm->indexData->indexBuffer = HardwareBufferManager::getSingleton()
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| 298 | .createIndexBuffer(HardwareIndexBuffer::IT_16BIT, 6*3,
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| 299 | HardwareBuffer::HBU_STATIC_WRITE_ONLY);
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| 300 | uint16* pI = static_cast<uint16*>(
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| 301 | sm->indexData->indexBuffer->lock(HardwareBuffer::HBL_DISCARD));
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| 302 | for (i = 0; i < 3; ++i)
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| 303 | {
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| 304 | int off = i*4;
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| 305 | *pI++ = 0 + off;
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| 306 | *pI++ = 3 + off;
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| 307 | *pI++ = 1 + off;
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| 308 |
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| 309 | *pI++ = 0 + off;
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| 310 | *pI++ = 2 + off;
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| 311 | *pI++ = 3 + off;
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| 312 | }
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| 313 |
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| 314 | sm->indexData->indexBuffer->unlock();
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| 315 | sm->setMaterialName(mGrassMaterial);
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| 316 | MaterialPtr material = MaterialManager::getSingleton().getByName(mGrassMaterial);
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| 317 | material->setReceiveShadows(mGrassShadowReceiver);
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| 318 | msh->load();
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| 319 |
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| 320 | }
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| 321 |
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| 322 | // This method should be called in the createScene method...
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| 323 | void initGrass()
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| 324 | {
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| 325 | createGrassMesh();
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| 326 |
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| 327 | Entity* e = mSceneMgr->createEntity("1", mGrassMeshName);
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| 328 |
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| 329 | StaticGeometry* s = mSceneMgr->createStaticGeometry("bing");
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| 330 | s->setRegionDimensions(Vector3(1000,1000,1000));
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| 331 | // Set the region origin so the centre is at 0 world
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| 332 | s->setOrigin(Vector3(-500, 500, -500));
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| 333 |
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| 334 | for (int x = -mGrassLandscapeSizeX; x < mGrassLandscapeSizeX; x += mGrassFrequency)
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| 335 | {
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| 336 | for (int z = -mGrassLandscapeSizeZ; z < mGrassLandscapeSizeZ; z += mGrassFrequency)
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| 337 | {
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| 338 | Vector3 pos(
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| 339 | x + Math::RangeRandom(-mGrassInterFrequency,mGrassInterFrequency),
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| 340 | mHeightPosition,
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| 341 | z + Math::RangeRandom(-mGrassInterFrequency,mGrassInterFrequency));
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| 342 | Quaternion orientation;
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| 343 | orientation.FromAngleAxis(
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| 344 | Degree(Math::RangeRandom(0, 359)),
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| 345 | Vector3::UNIT_Y);
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| 346 | Vector3 grassScale = Vector3(Math::RangeRandom(mGrassScaleRandomRangeMin[0],mGrassScaleRandomRangeMax[0]),
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| 347 | Math::RangeRandom(mGrassScaleRandomRangeMin[1],mGrassScaleRandomRangeMax[1]),
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| 348 | Math::RangeRandom(mGrassScaleRandomRangeMin[2],mGrassScaleRandomRangeMax[2]));
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| 349 | Vector3 scale(grassScale);
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| 350 | s->addEntity(e, pos, orientation, scale);
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| 351 | }
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| 352 |
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| 353 | }
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| 354 |
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| 355 | s->build();
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| 356 | mStaticGeom = s;
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[1546] | 357 |
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| 358 | setGrassCastShadows(mShadowCaster);
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[1493] | 359 | }
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| 360 |
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| 361 | void setGrassShadowReceiver(bool value)
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| 362 | {
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| 363 | mGrassShadowReceiver = value;
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| 364 | }
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| 365 | }; |
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