| 1 | /*==========================================================================
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| 2 | * (C) 2005 Universitat Jaume I
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| 3 | *==========================================================================
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| 4 | * PROYECT: GAME TOOLS
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| 5 | *==========================================================================
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| 6 | * CONTENT:
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| 7 | *
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| 8 | *
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| 9 | * @file GeoLodStripsLibrary.cpp
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| 10 | *===========================================================================*/
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| 11 |
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| 12 | #include "GeoLodStripsLibrary.h"
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| 13 |
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| 14 | using namespace Geometry;
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| 15 |
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| 16 | //-----------------------------------------------------------------------------
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| 17 | // Constructors.
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| 18 | //-----------------------------------------------------------------------------
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| 19 | LodStripsLibrary::LodStripsLibrary( std::string name, Mesh *geomesh, CREATEMULTIINDEXDATAFUNC midfun)
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| 20 | :create_multi_index_data_func(midfun?midfun:DefaultMultiIndexDataCreator)
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| 21 | {
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| 22 | const char *name_of_file;
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| 23 |
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| 24 | // Sets the current lod.
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| 25 | mCurrentLod = 0;
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| 26 |
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| 27 | // Converts a String to const char *.
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| 28 | name_of_file = name.data();
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| 29 |
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| 30 | // Sets the global mesh.
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| 31 | mGeoMesh = geomesh;
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| 32 |
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| 33 | dataRetrievalInterface=NULL;
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| 34 |
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| 35 | // Loads the Level Of Detail file.
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| 36 | LodStripsLibrary::LoadStripMesh((char*)name_of_file,mGeoMesh);
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| 37 |
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| 38 | GoToLod(0.0f);
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| 39 | minFaces = 0;
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| 40 | for (unsigned int strip = 0; strip < mTotalStrips; strip++)
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| 41 | minFaces += int(mStrips[strip].size() - 2);
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| 42 |
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| 43 | GoToLod(1.0f);
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| 44 | maxFaces = 0;
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| 45 | for (unsigned int strip = 0; strip < mTotalStrips; strip++)
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| 46 | maxFaces += int(mStrips[strip].size() - 2);
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| 47 | }
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| 48 |
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| 49 | //-----------------------------------------------------------------------------
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| 50 | // Destroyer.
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| 51 | //-----------------------------------------------------------------------------
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| 52 | LodStripsLibrary::~LodStripsLibrary()
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| 53 | {
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| 54 | delete [] mStrips;
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| 55 | if (dataRetrievalInterface)
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| 56 | delete dataRetrievalInterface;
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| 57 | }
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| 58 |
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| 59 | //-----------------------------------------------------------------------------
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| 60 | // Public.
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| 61 | //-----------------------------------------------------------------------------
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| 62 |
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| 63 | //-----------------------------------------------------------------------------
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| 64 | // Go to the level of detail.
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| 65 | //-----------------------------------------------------------------------------
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| 66 | void LodStripsLibrary::GoToLod(float lodfactor)
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| 67 | {
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| 68 | register int j;
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| 69 | register int offset;
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| 70 | long int i;
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| 71 | long int k;
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| 72 | long int b_change_ok = 1;
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| 73 | unsigned long int lod;
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| 74 | long int t;
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| 75 | long int r;
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| 76 | long int next;
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| 77 | long int el1;
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| 78 | long int el2;
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| 79 | long int total_changes;
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| 80 | long int totalR;
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| 81 | SmallIntVector *strip;
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| 82 | SmallIntVector::iterator start;
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| 83 | uint32 return_value;
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| 84 |
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| 85 | uint32 newLOD = (1.0f-lodfactor) * mLods;
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| 86 |
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| 87 | // Initialize the return value to the current LOD.
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| 88 | return_value = mCurrentLod;
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| 89 |
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| 90 | if (newLOD != mCurrentLod)
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| 91 | {
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| 92 | if (newLOD > mCurrentLod)
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| 93 | {
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| 94 | // Forwards.
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| 95 | // Increments LOD.
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| 96 | for (lod = mCurrentLod; lod < newLOD; lod++)
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| 97 | {
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| 98 | next = mVertex[lod];
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| 99 | total_changes = mPChanges[lod];
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| 100 |
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| 101 | for (i = 0; i < total_changes; i++)
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| 102 | {
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| 103 | // Strip change.
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| 104 | t = mCurrentRegLOD->strip;
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| 105 | strip = &(mStrips[t]);
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| 106 | start = strip->begin();
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| 107 |
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| 108 | // Position.
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| 109 | totalR = mCurrentRegLOD->position;
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| 110 |
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| 111 | for (j = totalR - 1; j >= 0; j--)
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| 112 | {
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| 113 | start[*mCurrentData] = next;
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| 114 |
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| 115 | ++mCurrentData;
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| 116 | }
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| 117 |
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| 118 | // L1.
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| 119 | totalR = mCurrentRegLOD->vertexRepetition;
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| 120 |
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| 121 | for (j = totalR - 1; j >= 0; j--)
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| 122 | {
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| 123 | offset = *mCurrentData + 1;
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| 124 |
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| 125 | strip->erase( start + offset,
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| 126 | start
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| 127 | +
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| 128 | offset
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| 129 | +
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| 130 | (*(mCurrentData + 1)));
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| 131 |
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| 132 | ++mCurrentData;
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| 133 | ++mCurrentData;
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| 134 | }
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| 135 |
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| 136 | // L2
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| 137 | totalR = mCurrentRegLOD->edgeRepetition;
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| 138 |
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| 139 | for (j = totalR - 1; j >= 0; j--)
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| 140 | {
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| 141 | offset = *mCurrentData + 2;
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| 142 | strip->erase( start + offset,
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| 143 | start
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| 144 | +
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| 145 | offset
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| 146 | +
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| 147 | 2*(*(mCurrentData + 1)));
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| 148 |
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| 149 | mCurrentData++;
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| 150 | mCurrentData++;
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| 151 | }
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| 152 |
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| 153 | mCurrentRegLOD++;
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| 154 |
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| 155 | mStripsChanges[t] = 1;
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| 156 |
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| 157 | }
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| 158 |
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| 159 | mCurrentLod = lod + 1;
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| 160 | }
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| 161 |
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| 162 | }
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| 163 | // If LOD is less than actual.
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| 164 | else
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| 165 | {
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| 166 | mCurrentRegLOD--;
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| 167 | mCurrentData--;
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| 168 |
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| 169 | // Decrements LOD.
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| 170 | for (lod = mCurrentLod; lod > newLOD; lod--)
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| 171 | {
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| 172 | total_changes = mPChanges[lod - 1];
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| 173 |
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| 174 | for (i = 0; i < total_changes; i++)
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| 175 | {
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| 176 | t = mCurrentRegLOD->strip;
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| 177 | strip = &(mStrips[t]);
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| 178 | start = mStrips[t].begin();
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| 179 |
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| 180 | // L2.
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| 181 | totalR = mCurrentRegLOD->edgeRepetition;
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| 182 |
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| 183 | for (j = 0; j < totalR; j++)
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| 184 | {
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| 185 | el1 = (*strip)[*(mCurrentData - 1)];
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| 186 | el2 = (*strip)[*(mCurrentData - 1) + 1];
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| 187 | r = *(mCurrentData);
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| 188 |
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| 189 | for (k = 0; k < r; k++)
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| 190 | {
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| 191 | (*strip).insert(start+*(mCurrentData - 1),el2);
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| 192 | (*strip).insert(start+*(mCurrentData - 1),el1);
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| 193 | }
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| 194 |
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| 195 | mCurrentData--;
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| 196 | mCurrentData--;
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| 197 | }
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| 198 |
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| 199 | // Vertex Repetition.
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| 200 | totalR = mCurrentRegLOD->vertexRepetition;
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| 201 |
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| 202 | for (j = 0; j < totalR; j++)
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| 203 | {
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| 204 | el1 = (*strip)[*(mCurrentData-1)];
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| 205 | r = *(mCurrentData);
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| 206 |
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| 207 | for (k = 0; k < r; k++)
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| 208 | {
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| 209 | (*strip).insert(start+*(mCurrentData-1),el1);
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| 210 | }
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| 211 |
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| 212 | mCurrentData--;
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| 213 | mCurrentData--;
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| 214 | }
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| 215 |
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| 216 | // POS.
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| 217 | totalR = mCurrentRegLOD->position;
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| 218 |
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| 219 | for (j = 0; j < totalR; j++)
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| 220 | {
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| 221 | (*strip)[*mCurrentData] = lod - 1;
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| 222 | mCurrentData--;
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| 223 | }
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| 224 |
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| 225 | mCurrentRegLOD--;
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| 226 | mStripsChanges[t] = 1;
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| 227 | }
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| 228 |
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| 229 | // Update LOD.
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| 230 | mCurrentLod = lod - 1;
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| 231 | }
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| 232 |
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| 233 | mCurrentData++;
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| 234 | mCurrentRegLOD++;
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| 235 | }
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| 236 | }
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| 237 |
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| 238 | UpdateDataRetrievalInterface();
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| 239 | // return return_value;
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| 240 | }
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| 241 |
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| 242 | //-----------------------------------------------------------------------------
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| 243 | // Gets the maximum level of detail.
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| 244 | //-----------------------------------------------------------------------------
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| 245 | uint32 LodStripsLibrary::MaxLod()
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| 246 | {
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| 247 | return mMaxLod;
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| 248 | }
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| 249 |
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| 250 | //-----------------------------------------------------------------------------
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| 251 | // Gets the minimum level of detail.
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| 252 | //-----------------------------------------------------------------------------
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| 253 | uint32 LodStripsLibrary::MinLod()
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| 254 | {
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| 255 | return mMinLod;
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| 256 | }
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| 257 |
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| 258 | //-----------------------------------------------------------------------------
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| 259 | // Returns the number of vertices of the highest LOD.
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| 260 | //-----------------------------------------------------------------------------
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| 261 | uint32 LodStripsLibrary::MaxVertices()
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| 262 | {
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| 263 | return mMaxVerticesLOD;
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| 264 | }
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| 265 |
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| 266 | //-----------------------------------------------------------------------------
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| 267 | // Returns the number of vertices of the lowest LOD.
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| 268 | //-----------------------------------------------------------------------------
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| 269 | uint32 LodStripsLibrary::MinVertices()
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| 270 | {
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| 271 | uint32 number_of_vertices;
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| 272 |
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| 273 | // Total vertices of minimum lod.
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| 274 | number_of_vertices = mMaxVerticesLOD - (mMinLod + 1);
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| 275 |
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| 276 | return number_of_vertices;
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| 277 | }
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| 278 |
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| 279 | //-----------------------------------------------------------------------------
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| 280 | // Returns the number of triangles of the highest LOD.
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| 281 | //-----------------------------------------------------------------------------
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| 282 | uint32 LodStripsLibrary::MaxFaces()
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| 283 | {
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| 284 | /* uint32 number_of_faces;
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| 285 |
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| 286 | uint32 current_lod;
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| 287 |
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| 288 | current_lod = GoToLod(MaxLod());
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| 289 |
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| 290 | // Initialize number of faces count.
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| 291 | number_of_faces = 0;
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| 292 |
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| 293 | // For each strip.
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| 294 | for (unsigned int strip = 0; strip < mTotalStrips; strip++)
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| 295 | {
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| 296 | number_of_faces += int(mStrips[strip].size() - 2);
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| 297 | }
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| 298 |
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| 299 | GoToLod(current_lod);
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| 300 |
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| 301 | return number_of_faces;*/
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| 302 |
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| 303 | return maxFaces;
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| 304 | }
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| 305 |
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| 306 | //-----------------------------------------------------------------------------
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| 307 | // Returns the number of triangles of the lowest LOD.
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| 308 | //-----------------------------------------------------------------------------
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| 309 | uint32 LodStripsLibrary::MinFaces()
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| 310 | {
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| 311 | /* uint32 current_lod;
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| 312 | uint32 number_of_faces;
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| 313 |
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| 314 | current_lod = GoToLod(MinLod());
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| 315 |
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| 316 | // Initialize number of faces count.
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| 317 | number_of_faces = 0;
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| 318 |
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| 319 | // For each strip.
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| 320 | for (unsigned int strip = 0; strip < mTotalStrips; strip++)
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| 321 | {
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| 322 | number_of_faces += int(mStrips[strip].size() - 2);
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| 323 | }
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| 324 |
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| 325 | GoToLod(current_lod);
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| 326 |
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| 327 | return number_of_faces;*/
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| 328 |
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| 329 | return minFaces;
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| 330 | }
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| 331 |
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| 332 | //-----------------------------------------------------------------------------
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| 333 | // Establishes the new LOD range.
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| 334 | // Only the LODs in that range are stored and used.
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| 335 | //-----------------------------------------------------------------------------
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| 336 | void LodStripsLibrary::TrimByLod(uint32 minLod, uint32 maxLod)
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| 337 | {
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| 338 | // Refresh number of vercies of the max lod.
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| 339 | mMaxVerticesLOD += mMaxLod - maxLod;
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| 340 |
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| 341 | mMinLod = minLod;
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| 342 | mMaxLod = maxLod;
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| 343 | }
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| 344 | /*
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| 345 | //-----------------------------------------------------------------------------
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| 346 | // Get strip count.
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| 347 | //-----------------------------------------------------------------------------
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| 348 | uint32 LodStripsLibrary::GetStripCount() const
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| 349 | {
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| 350 | return (uint32) mTotalStrips;
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| 351 | }
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| 352 |
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| 353 | //-----------------------------------------------------------------------------
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| 354 | // Get Index by strip.
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| 355 | //-----------------------------------------------------------------------------
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| 356 | uint32 LodStripsLibrary::GetIndexCountByStrip(uint32 istrip) const
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| 357 | {
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| 358 | return (uint32) mStrips[istrip].size();
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| 359 | }
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| 360 | */
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| 361 | //-----------------------------------------------------------------------------
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| 362 | // Private.
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| 363 | //-----------------------------------------------------------------------------
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| 364 |
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| 365 | //-----------------------------------------------------------------------------
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| 366 | // Copy a STL vector to a C array.
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| 367 | //-----------------------------------------------------------------------------
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| 368 | void LodStripsLibrary::CopyVectors2Arrays()
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| 369 | {
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| 370 | unsigned int i;
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| 371 | unsigned int j;
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| 372 | SmallInt max;
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| 373 | SmallInt t;
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| 374 | SmallInt *data_array;
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| 375 | SmallIntVector tira;
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| 376 | LODRegisterType *changes_array;
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| 377 | LODRegisterVector list_changes;
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| 378 |
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| 379 | mTotalStrips = int(mFileStrips.size());
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| 380 | mVertex = new SmallInt[mTotalVertices];
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| 381 | mStripsChanges = new SmallInt[mTotalChanges];
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| 382 | mStrips = new SmallIntVector[mTotalStrips];
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| 383 | data_array = new SmallInt[mData.size()];
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| 384 |
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| 385 | max = 0;
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| 386 | mTotalFaces = 0;
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| 387 |
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| 388 | unsigned int * strip_sizes = new unsigned int[mFileStrips.size()];
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| 389 | for (i = 0; i < mFileStrips.size(); i++)
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| 390 | {
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| 391 | strip_sizes[i] = t = int(mFileStrips[i].size());
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| 392 | if (t>max)
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| 393 | max = t;
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| 394 | mTotalFaces += t - 2;
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| 395 | }
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| 396 |
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| 397 | changes_array = new LODRegisterType[mFileChangesLOD.size()];
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| 398 |
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| 399 | // Fill up changes array.
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| 400 | for (i = 0; i < mFileChangesLOD.size(); ++i)
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| 401 | {
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| 402 | changes_array[i] = mFileChangesLOD[i];
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| 403 | }
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| 404 |
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| 405 | mCurrentRegLOD = changes_array;
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| 406 |
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| 407 | // Copy strips.
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| 408 | dataRetrievalInterface=create_multi_index_data_func(mFileStrips.size(),strip_sizes);
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| 409 | dataRetrievalInterface->Begin();
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| 410 | for (i = 0; i < mFileStrips.size(); i++)
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| 411 | {
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| 412 | for (j = 0; j < mFileStrips[i].size(); j++)
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| 413 | {
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| 414 | mStrips[i].push_back(mFileStrips[i][j]);
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| 415 | dataRetrievalInterface->SetIndex(i,j,mFileStrips[i][j]);
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| 416 | }
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| 417 |
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| 418 | // Reset flags of strips changed.
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| 419 | mStripsChanges[i] = 0;
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| 420 | }
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| 421 | dataRetrievalInterface->End();
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| 422 |
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| 423 | for (i = 0; i < mData.size(); i++)
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| 424 | {
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| 425 | data_array[i] = mData[i];
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| 426 | }
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| 427 |
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| 428 | mCurrentData = data_array;
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| 429 |
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| 430 | // Fill up mVertex.
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| 431 | for(i = 0; i < mFileVertices.size(); i++)
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| 432 | {
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| 433 | mVertex[i] = mFileVertices[i];
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| 434 | }
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| 435 |
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| 436 | delete[] strip_sizes;
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| 437 | }
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| 438 |
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| 439 | //-----------------------------------------------------------------------------
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| 440 | // LoadStripMesh
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| 441 | //-----------------------------------------------------------------------------
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| 442 | void LodStripsLibrary::LoadStripMesh(char *name, Mesh *geomesh)
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| 443 | {
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| 444 | FILE *fp;
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| 445 | SmallIntVector strip_aux;
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| 446 | LODRegisterType lod_register;
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| 447 | std::vector <LODRegisterType> list_pos;
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| 448 | std::vector <unsigned int> p_changes;
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| 449 | int value;
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| 450 | int v = 0;
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| 451 | int t = -1;
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| 452 | int s = 0;
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| 453 | int next = 0;
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| 454 | int c = -1;
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| 455 | char buff[80];
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| 456 | Index *index;
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| 457 | Index *indexBegin;
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| 458 | Index *indexEnd;
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| 459 | SubMesh *geoSubMesh;
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| 460 |
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| 461 |
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| 462 |
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| 463 | // For each one of the submeshes.
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| 464 | for (unsigned int submesh = 0; submesh < geomesh->mSubMeshCount; submesh++)
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| 465 | {
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| 466 | geoSubMesh = &geomesh->mSubMesh[submesh];
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| 467 |
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| 468 | // For each one of the strips.
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| 469 | for (unsigned int strip = 0; strip < geoSubMesh->mStripCount; strip++)
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| 470 | {
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| 471 | // Insert an empty strip.
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| 472 | t++;
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| 473 | strip_aux.clear();
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| 474 | mFileStrips.push_back(strip_aux);
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| 475 |
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| 476 | // First index of the strip.
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| 477 | indexBegin = geoSubMesh->mStrip[strip];
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| 478 |
|
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| 479 | // If the strips is not the first.
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| 480 | /*
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| 481 | if (strip != 0)
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| 482 | {
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| 483 | indexBegin++;
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| 484 | }
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| 485 | */
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| 486 |
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| 487 | // If is the final strip
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| 488 | if (strip == (geoSubMesh->mStripCount - 1))
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| 489 | {
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| 490 | // The end of the index array.
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| 491 | indexEnd = &geoSubMesh->mIndex[geoSubMesh->mIndexCount];
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| 492 | }
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| 493 | else
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| 494 | {
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| 495 | // The beginning of the next strip.
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| 496 | indexEnd = geoSubMesh->mStrip[strip + 1];
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| 497 |
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|---|
| 498 | // Remove degenerated
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| 499 | //indexEnd--;
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|---|
| 500 | }
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|---|
| 501 |
|
|---|
| 502 | int i;
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|---|
| 503 | i = 0;
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|---|
| 504 | // For each index of the strip.
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| 505 | for (index = indexBegin; index < indexEnd; index++)
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|---|
| 506 | {
|
|---|
| 507 | mFileStrips[t].push_back(indexBegin[i]);
|
|---|
| 508 | i++;
|
|---|
| 509 | }
|
|---|
| 510 | }
|
|---|
| 511 | }
|
|---|
| 512 |
|
|---|
| 513 | // Open the LOD file.
|
|---|
| 514 | if ((fp = fopen (name, "r")) == NULL)
|
|---|
| 515 | {
|
|---|
| 516 | // Error in open.
|
|---|
| 517 | }
|
|---|
| 518 | else
|
|---|
| 519 | {
|
|---|
| 520 | mTotalChanges = 0;
|
|---|
| 521 |
|
|---|
| 522 | while (!feof (fp))
|
|---|
| 523 | {
|
|---|
| 524 | fgets (buff, 80, fp);
|
|---|
| 525 |
|
|---|
| 526 | if (*buff == 'v')
|
|---|
| 527 | {
|
|---|
| 528 | sscanf (buff+2,"%d",&value);
|
|---|
| 529 |
|
|---|
| 530 | mFileVertices.push_back(value);
|
|---|
| 531 | v++;
|
|---|
| 532 | }
|
|---|
| 533 | else if ( (*buff == 'c') || (*buff == 'd'))
|
|---|
| 534 | {
|
|---|
| 535 | if (*buff == 'c')
|
|---|
| 536 | {
|
|---|
| 537 | c++;
|
|---|
| 538 | }
|
|---|
| 539 | else
|
|---|
| 540 | {
|
|---|
| 541 | unsigned int a;
|
|---|
| 542 | unsigned int b;
|
|---|
| 543 | unsigned int c;
|
|---|
| 544 | unsigned int d;
|
|---|
| 545 |
|
|---|
| 546 | sscanf (buff+2,"%u %u %u %u\n",&a,&b,&c,&d);
|
|---|
| 547 | lod_register.strip = a;
|
|---|
| 548 | lod_register.position = b;
|
|---|
| 549 | lod_register.vertexRepetition = c;
|
|---|
| 550 | lod_register.edgeRepetition = d;
|
|---|
| 551 |
|
|---|
| 552 | mFileChangesLOD.push_back(lod_register);
|
|---|
| 553 | }
|
|---|
| 554 | }
|
|---|
| 555 | else if (*buff=='b')
|
|---|
| 556 | {
|
|---|
| 557 | sscanf(buff+2,"%u",&value);
|
|---|
| 558 | mData.push_back(value);
|
|---|
| 559 | }
|
|---|
| 560 | else if (*buff=='p')
|
|---|
| 561 | {
|
|---|
| 562 | sscanf (buff+2,"%u",&value);
|
|---|
| 563 | p_changes.push_back(value);
|
|---|
| 564 | }
|
|---|
| 565 | }
|
|---|
| 566 |
|
|---|
| 567 | fclose(fp);
|
|---|
| 568 |
|
|---|
| 569 | // Max / Min values for LOD.
|
|---|
| 570 | mLods = int(p_changes.size());
|
|---|
| 571 | mMaxLod = 0;
|
|---|
| 572 | mMinLod = mLods;
|
|---|
| 573 |
|
|---|
| 574 | mPChanges = new SmallInt[mLods];
|
|---|
| 575 |
|
|---|
| 576 | for (unsigned int i = 0; i < mLods; i++)
|
|---|
| 577 | {
|
|---|
| 578 | mPChanges[i] = p_changes[i];
|
|---|
| 579 | }
|
|---|
| 580 |
|
|---|
| 581 | mTotalVertices = int(mFileVertices.size());
|
|---|
| 582 | mMaxVerticesLOD = mTotalVertices;
|
|---|
| 583 | mTotalStrips = int(mFileStrips.size());
|
|---|
| 584 | mTotalChanges = int(mFileChangesLOD.size());
|
|---|
| 585 |
|
|---|
| 586 | //Copy the data to the structure we will use
|
|---|
| 587 | CopyVectors2Arrays();
|
|---|
| 588 | }
|
|---|
| 589 | }
|
|---|
| 590 |
|
|---|
| 591 |
|
|---|
| 592 | void LodStripsLibrary::UpdateDataRetrievalInterface(void)
|
|---|
| 593 | {
|
|---|
| 594 | dataRetrievalInterface->Begin();
|
|---|
| 595 | for (int i=0; i<mTotalStrips; i++)
|
|---|
| 596 | {
|
|---|
| 597 | unsigned int j=0;
|
|---|
| 598 | for (SmallIntVector::iterator it=mStrips[i].begin(); it!=mStrips[i].end(); it++, j++)
|
|---|
| 599 | dataRetrievalInterface->SetIndex(i,j,*it);
|
|---|
| 600 | dataRetrievalInterface->SetNumValidIndices(i,j);
|
|---|
| 601 | }
|
|---|
| 602 | dataRetrievalInterface->End();
|
|---|
| 603 | } |
|---|
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