[699] | 1 | #include "BBCOgreMeshSerializer.h"
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| 2 |
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| 3 | namespace BBC {
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| 4 |
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| 5 | UniqueVertex::UniqueVertex()
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| 6 | : position(Ogre::Vector3::ZERO), normal(Ogre::Vector3::ZERO), colour(0), nextIndex(0)
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| 7 | {
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| 8 | for (int i = 0; i < OGRE_MAX_TEXTURE_COORD_SETS; ++i)
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| 9 | uv[i] = Ogre::Vector3::ZERO;
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| 10 | }
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| 11 |
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| 12 | bool UniqueVertex::operator==(const UniqueVertex& rhs) const
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| 13 | {
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| 14 | bool ret = position == rhs.position &&
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| 15 | normal == rhs.normal &&
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| 16 | colour == rhs.colour;
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| 17 | if (!ret) return ret;
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| 18 |
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| 19 | for (int i = 0; i < OGRE_MAX_TEXTURE_COORD_SETS && ret; ++i)
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| 20 | {
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| 21 | ret = ret && (uv[i] == rhs.uv[i]);
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| 22 | }
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| 23 |
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| 24 | return ret;
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| 25 | }
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| 26 |
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[721] | 27 | void OgreMeshSerializer::setEntity(EntityPtr entity)
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[699] | 28 | {
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| 29 | mEntity = entity;
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| 30 | }
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| 31 |
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[721] | 32 | EntityPtr OgreMeshSerializer::getEntity()
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[699] | 33 | {
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| 34 | return mEntity;
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| 35 | }
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| 36 |
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| 37 | OgreMeshSerializer::OgreMeshSerializer()
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| 38 | {
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| 39 | }
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| 40 |
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| 41 | OgreMeshSerializer::~OgreMeshSerializer()
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| 42 | {
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| 43 | }
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| 44 |
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| 45 |
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| 46 | void OgreMeshSerializer::exportMesh(const Ogre::String& fileName, bool mergeSubMeshes = false, bool tangents = false)
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| 47 | {
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| 48 |
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| 49 | Ogre::LogManager::getSingleton().logMessage("** Begin OGRE Mesh Export **");
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| 50 | // Derive the scene root
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| 51 |
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[721] | 52 | // Construct mesh
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| 53 | BBC::MeshPtr pMesh(new BBC::Mesh(Ogre::MeshManager::getSingleton().createManual(fileName, fileName).getPointer()));
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| 54 |
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[731] | 55 | Ogre::MeshPtr mesh = Ogre::MeshManager::getSingleton().load(fileName, fileName);
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[699] | 56 |
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[721] | 57 | Ogre::LogManager::getSingleton().logMessage("Num.SubEntities:" + Ogre::StringConverter::toString(mEntity->getNumSubEntities()));
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[699] | 58 |
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[721] | 59 | mEntity->setMesh(pMesh);
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| 60 |
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[699] | 61 | // write the data into a mesh
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[721] | 62 | buildMesh(pMesh, mergeSubMeshes);
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[699] | 63 |
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| 64 | if(tangents)
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| 65 | {
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| 66 | Ogre::LogManager::getSingleton().logMessage("Calculating tangents");
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| 67 | unsigned short src, dest;
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[721] | 68 | if (pMesh->get()->suggestTangentVectorBuildParams(src, dest))
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[699] | 69 | {
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[721] | 70 | pMesh->get()->buildTangentVectors(src, dest);
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[699] | 71 | }
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| 72 | else
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| 73 | {
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| 74 | Ogre::LogManager::getSingleton().logMessage("Could not derive tangents parameters");
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| 75 | }
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| 76 | }
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| 77 |
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| 78 | Ogre::LogManager::getSingleton().logMessage("** OGRE Mesh Export Complete **");
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| 79 | }
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| 80 |
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[721] | 81 | void OgreMeshSerializer::buildMesh(MeshPtr pMesh, bool mergeSubmeshes)
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[699] | 82 | {
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| 83 | if (!mergeSubmeshes)
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| 84 | {
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| 85 | // build contents of this polymesh into ProtoSubMesh(es)
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| 86 | generateEntityAABB(pMesh);
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| 87 |
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| 88 | // export out at the end of every PolygonMesh
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| 89 | exportSubMeshes(pMesh);
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| 90 | }
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| 91 | // TODO
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| 92 | if (mergeSubmeshes)
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| 93 | {
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| 94 | // build contents of this polymesh into ProtoSubMesh(es)
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| 95 | mEntity->mergeSubEntities();
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| 96 |
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| 97 | generateEntityAABB(pMesh);
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| 98 |
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| 99 | // export out the combined result
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| 100 | exportSubMeshes(pMesh);
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| 101 | }
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| 102 | }
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| 103 |
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[721] | 104 | void OgreMeshSerializer::generateEntityAABB(MeshPtr pMesh)
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[699] | 105 | {
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| 106 | // Bounds calculation
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| 107 | Ogre::Real squaredRadius = 0.0f;
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| 108 | Ogre::Vector3 min, max;
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| 109 | bool first = true;
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| 110 |
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| 111 | for (unsigned int iSubEntity = 0; iSubEntity < mEntity->getNumSubEntities(); iSubEntity++)
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| 112 | {
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| 113 | for (size_t jVertex = 0; jVertex < mEntity->getSubEntity(iSubEntity)->getNumVertices(); jVertex++)
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| 114 | {
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| 115 | if (first)
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| 116 | {
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| 117 | squaredRadius = mEntity->getSubEntity(iSubEntity)->getUniqueVertex(jVertex).position.squaredLength();
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| 118 | min = max = mEntity->getSubEntity(iSubEntity)->getUniqueVertex(jVertex).position;
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| 119 | first = false;
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| 120 | }
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| 121 | else
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| 122 | {
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| 123 | size_t numVertices = (unsigned int)mEntity->getSubEntity(iSubEntity)->getNumVertices();
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| 124 | //Ogre::LogManager::getSingleton().logMessage("NumVertices:" + Ogre::StringConverter::toString(numVertices));
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| 125 | //Ogre::LogManager::getSingleton().logMessage("IDVertex:" + Ogre::StringConverter::toString(jVertex) + "--" + Ogre::StringConverter::toString(iSubEntity) + "--" + Ogre::StringConverter::toString(mEntity->getSubEntity(iSubEntity)->getUniqueVertex(jVertex).position));
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| 126 | squaredRadius =
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| 127 | std::max(squaredRadius,mEntity->getSubEntity(iSubEntity)->getUniqueVertex(jVertex).position.squaredLength());
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| 128 | min.makeFloor(mEntity->getSubEntity(iSubEntity)->getUniqueVertex(jVertex).position);
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| 129 | max.makeCeil(mEntity->getSubEntity(iSubEntity)->getUniqueVertex(jVertex).position);
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| 130 | }
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| 131 | }
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| 132 | }
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| 133 |
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| 134 | // Merge bounds
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| 135 | Ogre::AxisAlignedBox box;
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| 136 | box.setExtents(min, max);
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[721] | 137 | box.merge(pMesh->get()->getBounds());
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| 138 | pMesh->get()->_setBounds(box);
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| 139 | pMesh->get()->_setBoundingSphereRadius(
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[699] | 140 | std::max(
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[721] | 141 | pMesh->get()->getBoundingSphereRadius(),
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[699] | 142 | Ogre::Math::Sqrt(squaredRadius)));
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| 143 |
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[721] | 144 | Ogre::LogManager::getSingleton().logMessage("Bounds:" + Ogre::StringConverter::toString(pMesh->get()->getBoundingSphereRadius()) + " -- Generated:" + Ogre::StringConverter::toString(pMesh->get()->getBounds().isNull()));
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[699] | 145 | }
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| 146 |
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[721] | 147 | void OgreMeshSerializer::exportSubMeshes(MeshPtr pMesh)
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[699] | 148 | {
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| 149 | for (unsigned int iSubEntity = 0; iSubEntity < mEntity->getNumSubEntities(); iSubEntity++)
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| 150 | {
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| 151 | exportSubMesh(pMesh,mEntity->getSubEntity(iSubEntity));
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| 152 | }
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| 153 | }
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| 154 |
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[721] | 155 | void OgreMeshSerializer::exportSubMesh(MeshPtr pMesh, SubEntityPtr subEntity)
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[699] | 156 | {
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| 157 | Ogre::SubMesh* sm = 0;
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| 158 | if (subEntity->getName() == "")
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| 159 | {
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[721] | 160 | sm = pMesh->get()->createSubMesh();
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[699] | 161 | }
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| 162 | else
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| 163 | {
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[721] | 164 | sm = pMesh->get()->createSubMesh(subEntity->getName());
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[699] | 165 | }
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| 166 | // Set material
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| 167 | sm->setMaterialName(subEntity->getMaterialName());
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| 168 | // never use shared geometry
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| 169 | sm->useSharedVertices = false;
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| 170 | sm->vertexData = new Ogre::VertexData();
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| 171 | // always do triangle list
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| 172 | sm->indexData->indexCount = subEntity->getNumFaces()*3;
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| 173 |
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| 174 | sm->vertexData->vertexCount = subEntity->getNumVertices();
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| 175 | // Determine index size
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| 176 | bool use32BitIndexes = false;
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| 177 | if (subEntity->getNumVertices() > 65536)
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| 178 | {
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| 179 | use32BitIndexes = true;
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| 180 | }
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| 181 |
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| 182 | sm->indexData->indexBuffer =
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| 183 | Ogre::HardwareBufferManager::getSingleton().createIndexBuffer(
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| 184 | use32BitIndexes ? Ogre::HardwareIndexBuffer::IT_32BIT : Ogre::HardwareIndexBuffer::IT_16BIT,
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| 185 | sm->indexData->indexCount,
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| 186 | Ogre::HardwareBuffer::HBU_STATIC_WRITE_ONLY);
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| 187 |
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| 188 | if (use32BitIndexes)
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| 189 | {
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| 190 | unsigned int* pIdx = static_cast<unsigned int*>(
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| 191 | sm->indexData->indexBuffer->lock(Ogre::HardwareBuffer::HBL_DISCARD));
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| 192 | writeIndexes(pIdx,subEntity);
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| 193 | sm->indexData->indexBuffer->unlock();
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| 194 | }
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| 195 | else
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| 196 | {
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| 197 | unsigned short int* pIdx = static_cast<unsigned short int*>(
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| 198 | sm->indexData->indexBuffer->lock(Ogre::HardwareBuffer::HBL_DISCARD));
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| 199 | writeIndexes(pIdx,subEntity);
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| 200 | sm->indexData->indexBuffer->unlock();
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| 201 | }
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| 202 |
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| 203 |
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| 204 | // define vertex declaration
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| 205 | unsigned buf = 0;
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| 206 | size_t offset = 0;
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| 207 | // always add position and normal
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| 208 | sm->vertexData->vertexDeclaration->addElement(buf, offset, Ogre::VET_FLOAT3, Ogre::VES_POSITION);
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| 209 | offset += Ogre::VertexElement::getTypeSize(Ogre::VET_FLOAT3);
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| 210 | sm->vertexData->vertexDeclaration->addElement(buf, offset, Ogre::VET_FLOAT3, Ogre::VES_NORMAL);
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| 211 | offset += Ogre::VertexElement::getTypeSize(Ogre::VET_FLOAT3);
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| 212 |
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| 213 | // Optional vertex colour
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[969] | 214 | if(subEntity->hasVertexColors())
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[699] | 215 | {
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| 216 | sm->vertexData->vertexDeclaration->addElement(buf, offset, Ogre::VET_COLOUR, Ogre::VES_DIFFUSE);
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| 217 | offset += Ogre::VertexElement::getTypeSize(Ogre::VET_COLOUR);
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| 218 | }
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| 219 |
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| 220 | // Define UVs
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| 221 | for (unsigned short uvi = 0; uvi < subEntity->getNumTexCoordSets(); uvi++)
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| 222 | {
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| 223 | Ogre::VertexElementType uvType = Ogre::VertexElement::multiplyTypeCount(Ogre::VET_FLOAT1, subEntity->getTexCoordDimensions(uvi));
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| 224 | sm->vertexData->vertexDeclaration->addElement(buf, offset, uvType, Ogre::VES_TEXTURE_COORDINATES, uvi);
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| 225 | offset += Ogre::VertexElement::getTypeSize(uvType);
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| 226 | }
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| 227 |
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| 228 | // create & fill buffer(s)
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| 229 | for (unsigned short b = 0; b <= sm->vertexData->vertexDeclaration->getMaxSource(); ++b)
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| 230 | {
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| 231 | createVertexBuffer(sm->vertexData, b, subEntity->getUniqueVertices());
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| 232 | }
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| 233 | }
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| 234 |
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| 235 | template <typename T>
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[721] | 236 | void OgreMeshSerializer::writeIndexes(T* buf, SubEntityPtr subEntity)
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[699] | 237 | {
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| 238 | for (unsigned int i = 0; i < subEntity->getNumFaces(); i++)
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| 239 | {
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| 240 | Ogre::Vector3 indexes = subEntity->getFaceVerticesIDs(i);
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| 241 | unsigned int i0, i1, i2;
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| 242 | i0 = (unsigned int)indexes[0];
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| 243 | i1 = (unsigned int)indexes[1];
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| 244 | i2 = (unsigned int)indexes[2];
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| 245 | *buf++ = static_cast<T>(i0);
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| 246 | *buf++ = static_cast<T>(i1);
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| 247 | *buf++ = static_cast<T>(i2);
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| 248 | }
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| 249 | }
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| 250 |
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| 251 | void OgreMeshSerializer::createVertexBuffer(Ogre::VertexData* vd,
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| 252 | unsigned short bufIdx, UniqueVertexList *uniqueVertexList)
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| 253 | {
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| 254 | Ogre::HardwareVertexBufferSharedPtr vbuf =
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| 255 | Ogre::HardwareBufferManager::getSingleton().createVertexBuffer(
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| 256 | vd->vertexDeclaration->getVertexSize(bufIdx),
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| 257 | vd->vertexCount,
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| 258 | Ogre::HardwareBuffer::HBU_STATIC_WRITE_ONLY);
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| 259 | vd->vertexBufferBinding->setBinding(bufIdx, vbuf);
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| 260 | size_t vertexSize = vd->vertexDeclaration->getVertexSize(bufIdx);
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| 261 |
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| 262 | char* pBase = static_cast<char*>(
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| 263 | vbuf->lock(Ogre::HardwareBuffer::HBL_DISCARD));
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| 264 |
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| 265 | Ogre::VertexDeclaration::VertexElementList elems =
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| 266 | vd->vertexDeclaration->findElementsBySource(bufIdx);
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| 267 | Ogre::VertexDeclaration::VertexElementList::iterator ei, eiend;
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| 268 | eiend = elems.end();
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| 269 | float* pFloat;
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| 270 | Ogre::RGBA* pRGBA;
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| 271 |
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| 272 | UniqueVertexList::iterator srci = uniqueVertexList->begin();
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| 273 |
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| 274 | for (size_t v = 0; v < vd->vertexCount; ++v, ++srci)
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| 275 | {
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| 276 | for (ei = elems.begin(); ei != eiend; ++ei)
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| 277 | {
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| 278 | Ogre::VertexElement& elem = *ei;
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| 279 | switch(elem.getSemantic())
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| 280 | {
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| 281 | case Ogre::VES_POSITION:
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| 282 | elem.baseVertexPointerToElement(pBase, &pFloat);
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| 283 | *pFloat++ = srci->position.x;
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| 284 | *pFloat++ = srci->position.y;
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| 285 | *pFloat++ = srci->position.z;
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| 286 | break;
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| 287 | case Ogre::VES_NORMAL:
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| 288 | elem.baseVertexPointerToElement(pBase, &pFloat);
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| 289 | *pFloat++ = srci->normal.x;
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| 290 | *pFloat++ = srci->normal.y;
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| 291 | *pFloat++ = srci->normal.z;
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| 292 | break;
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| 293 | case Ogre::VES_DIFFUSE:
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| 294 | elem.baseVertexPointerToElement(pBase, &pRGBA);
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| 295 | *pRGBA = srci->colour;
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| 296 | break;
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| 297 | case Ogre::VES_TEXTURE_COORDINATES:
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| 298 | elem.baseVertexPointerToElement(pBase, &pFloat);
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| 299 | for (int t = 0; t < Ogre::VertexElement::getTypeCount(elem.getType()); ++t)
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| 300 | {
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| 301 | Ogre::Real val = srci->uv[elem.getIndex()][t];
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| 302 | *pFloat++ = val;
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| 303 | }
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| 304 | break;
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| 305 | }
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| 306 | }
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| 307 | pBase += vertexSize;
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| 308 | }
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| 309 | vbuf->unlock();
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| 310 |
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| 311 | }
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| 312 |
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| 313 | }
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