text: 
  /*
   * -----------------------------------------------------------------------------
   * This source file is part of OGRE
   * (Object-oriented Graphics Rendering Engine)
   * For the latest info, see http://www.ogre3d.org/
   *
   * Copyright (c) 2000-2016 Torus Knot Software Ltd
   *
   * Permission is hereby granted, free of charge, to any person obtaining a copy
   * of this software and associated documentation files (the "Software"), to deal
   * in the Software without restriction, including without limitation the rights
   * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
   * copies of the Software, and to permit persons to whom the Software is
   * furnished to do so, subject to the following conditions:
   *
   * The above copyright notice and this permission notice shall be included in
   * all copies or substantial portions of the Software.
   *
   * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
   * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
   * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
   * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
   * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
   * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
   * THE SOFTWARE.
   * -----------------------------------------------------------------------------
   */
  
  #ifndef _LodInputProviderMesh_H__
  #define _LodInputProviderMesh_H__
  
  #include "OgreLodPrerequisites.h"
  #include "OgreLodInputProvider.h"
  #include "OgreLodData.h"
  #include "OgreSharedPtr.h"
  #include "OgreLogManager.h"
  
  namespace Ogre
  {
  
  class _OgreLodExport LodInputProviderMesh :
      public LodInputProvider
  {
  public:
      LodInputProviderMesh(MeshPtr mesh);
      /// Called when the data should be filled with the input.
      virtual void initData(LodData* data);
      
  protected:
      typedef vector<LodData::Vertex*>::type VertexLookupList;
      // This helps to find the vertex* in LodData for index buffer indices
      VertexLookupList mSharedVertexLookup;
      VertexLookupList mVertexLookup;
      MeshPtr mMesh;
  
      void tuneContainerSize(LodData* data);
      void initialize(LodData* data);
      void addIndexData(LodData* data, IndexData* indexData, bool useSharedVertexLookup, unsigned short submeshID);
      void addVertexData(LodData* data, VertexData* vertexData, bool useSharedVertexLookup);
      template<typename IndexType>
      void addIndexDataImpl(LodData* data, IndexType* iPos, const IndexType* iEnd,
                                                  VertexLookupList& lookup,
                                                  unsigned short submeshID)
      {
          // Loop through all triangles and connect them to the vertices.
          for (; iPos < iEnd; iPos += 3) {
              // It should never reallocate or every pointer will be invalid.
              OgreAssert(data->mTriangleList.capacity() > data->mTriangleList.size(), "");
              data->mTriangleList.push_back(LodData::Triangle());
              LodData::Triangle* tri = &data->mTriangleList.back();
              tri->isRemoved = false;
              tri->submeshID = submeshID;
              for (int i = 0; i < 3; i++) {
                  // Invalid index: Index is bigger then vertex buffer size.
                  OgreAssert(iPos[i] < lookup.size(), "");
                  tri->vertexID[i] = iPos[i];
                  tri->vertex[i] = lookup[iPos[i]];
              }
              if (tri->isMalformed()) {
  #if OGRE_DEBUG_MODE
                  stringstream str;
                  str << "In " << data->mMeshName << " malformed triangle found with ID: " << LodData::getVectorIDFromPointer(data->mTriangleList, tri) << ". " <<
                  std::endl;
                  printTriangle(tri, str);
                  str << "It will be excluded from Lod level calculations.";
                  LogManager::getSingleton().stream() << str.str();
  #endif
                  tri->isRemoved = true;
                  data->mIndexBufferInfoList[tri->submeshID].indexCount -= 3;
                  continue;
              }
              tri->computeNormal();
              addTriangleToEdges(data, tri);
          }
      }
  };
  
  }
  #endif
  
  
  