add assimp submodule

1 files changed, 927 insertions, 0 deletions

diff --git a/src/mesh/assimp-master/code/AssetLib/Ply/PlyLoader.cpp b/src/mesh/assimp-master/code/AssetLib/Ply/PlyLoader.cpp
new file mode 100644
index 0000000..6cf1a1c
--- /dev/null
+++ b/src/mesh/assimp-master/code/AssetLib/Ply/PlyLoader.cpp
@@ -0,0 +1,927 @@
+/*
+---------------------------------------------------------------------------
+Open Asset Import Library (assimp)
+---------------------------------------------------------------------------
+
+Copyright (c) 2006-2022, assimp team
+
+All rights reserved.
+
+Redistribution and use of this software in source and binary forms,
+with or without modification, are permitted provided that the following
+conditions are met:
+
+* Redistributions of source code must retain the above
+copyright notice, this list of conditions and the
+following disclaimer.
+
+* Redistributions in binary form must reproduce the above
+copyright notice, this list of conditions and the
+following disclaimer in the documentation and/or other
+materials provided with the distribution.
+
+* Neither the name of the assimp team, nor the names of its
+contributors may be used to endorse or promote products
+derived from this software without specific prior
+written permission of the assimp team.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+---------------------------------------------------------------------------
+*/
+
+/** @file  PlyLoader.cpp
+ *  @brief Implementation of the PLY importer class
+ */
+
+#ifndef ASSIMP_BUILD_NO_PLY_IMPORTER
+
+// internal headers
+#include "PlyLoader.h"
+#include <assimp/IOStreamBuffer.h>
+#include <assimp/importerdesc.h>
+#include <assimp/scene.h>
+#include <assimp/IOSystem.hpp>
+#include <memory>
+
+using namespace ::Assimp;
+
+static const aiImporterDesc desc = {
+    "Stanford Polygon Library (PLY) Importer",
+    "",
+    "",
+    "",
+    aiImporterFlags_SupportBinaryFlavour | aiImporterFlags_SupportTextFlavour,
+    0,
+    0,
+    0,
+    0,
+    "ply"
+};
+
+// ------------------------------------------------------------------------------------------------
+// Internal stuff
+namespace {
+// ------------------------------------------------------------------------------------------------
+// Checks that property index is within range
+template <class T>
+inline const T &GetProperty(const std::vector<T> &props, int idx) {
+    if (static_cast<size_t>(idx) >= props.size()) {
+        throw DeadlyImportError("Invalid .ply file: Property index is out of range.");
+    }
+
+    return props[idx];
+}
+} // namespace
+
+// ------------------------------------------------------------------------------------------------
+// Constructor to be privately used by Importer
+PLYImporter::PLYImporter() :
+        mBuffer(nullptr),
+        pcDOM(nullptr),
+        mGeneratedMesh(nullptr) {
+    // empty
+}
+
+// ------------------------------------------------------------------------------------------------
+// Destructor, private as well
+PLYImporter::~PLYImporter() {
+    // empty
+}
+
+// ------------------------------------------------------------------------------------------------
+// Returns whether the class can handle the format of the given file.
+bool PLYImporter::CanRead(const std::string &pFile, IOSystem *pIOHandler, bool /*checkSig*/) const {
+    static const char *tokens[] = { "ply" };
+    return SearchFileHeaderForToken(pIOHandler, pFile, tokens, AI_COUNT_OF(tokens));
+}
+
+// ------------------------------------------------------------------------------------------------
+const aiImporterDesc *PLYImporter::GetInfo() const {
+    return &desc;
+}
+
+// ------------------------------------------------------------------------------------------------
+static bool isBigEndian(const char *szMe) {
+    ai_assert(nullptr != szMe);
+
+    // binary_little_endian
+    // binary_big_endian
+    bool isBigEndian(false);
+#if (defined AI_BUILD_BIG_ENDIAN)
+    if ('l' == *szMe || 'L' == *szMe) {
+        isBigEndian = true;
+    }
+#else
+    if ('b' == *szMe || 'B' == *szMe) {
+        isBigEndian = true;
+    }
+#endif // ! AI_BUILD_BIG_ENDIAN
+
+    return isBigEndian;
+}
+
+// ------------------------------------------------------------------------------------------------
+// Imports the given file into the given scene structure.
+void PLYImporter::InternReadFile(const std::string &pFile, aiScene *pScene, IOSystem *pIOHandler) {
+    const std::string mode = "rb";
+    std::unique_ptr<IOStream> fileStream(pIOHandler->Open(pFile, mode));
+    if (!fileStream.get()) {
+        throw DeadlyImportError("Failed to open file ", pFile, ".");
+    }
+
+    // Get the file-size
+    const size_t fileSize(fileStream->FileSize());
+    if (0 == fileSize) {
+        throw DeadlyImportError("File ", pFile, " is empty.");
+    }
+
+    IOStreamBuffer<char> streamedBuffer(1024 * 1024);
+    streamedBuffer.open(fileStream.get());
+
+    // the beginning of the file must be PLY - magic, magic
+    std::vector<char> headerCheck;
+    streamedBuffer.getNextLine(headerCheck);
+
+    if ((headerCheck.size() < 3) ||
+            (headerCheck[0] != 'P' && headerCheck[0] != 'p') ||
+            (headerCheck[1] != 'L' && headerCheck[1] != 'l') ||
+            (headerCheck[2] != 'Y' && headerCheck[2] != 'y')) {
+        streamedBuffer.close();
+        throw DeadlyImportError("Invalid .ply file: Incorrect magic number (expected 'ply' or 'PLY').");
+    }
+
+    std::vector<char> mBuffer2;
+    streamedBuffer.getNextLine(mBuffer2);
+    mBuffer = (unsigned char *)&mBuffer2[0];
+
+    char *szMe = (char *)&this->mBuffer[0];
+    SkipSpacesAndLineEnd(szMe, (const char **)&szMe);
+
+    // determine the format of the file data and construct the aiMesh
+    PLY::DOM sPlyDom;
+    this->pcDOM = &sPlyDom;
+
+    if (TokenMatch(szMe, "format", 6)) {
+        if (TokenMatch(szMe, "ascii", 5)) {
+            SkipLine(szMe, (const char **)&szMe);
+            if (!PLY::DOM::ParseInstance(streamedBuffer, &sPlyDom, this)) {
+                if (mGeneratedMesh != nullptr) {
+                    delete (mGeneratedMesh);
+                    mGeneratedMesh = nullptr;
+                }
+
+                streamedBuffer.close();
+                throw DeadlyImportError("Invalid .ply file: Unable to build DOM (#1)");
+            }
+        } else if (!::strncmp(szMe, "binary_", 7)) {
+            szMe += 7;
+            const bool bIsBE(isBigEndian(szMe));
+
+            // skip the line, parse the rest of the header and build the DOM
+            if (!PLY::DOM::ParseInstanceBinary(streamedBuffer, &sPlyDom, this, bIsBE)) {
+                if (mGeneratedMesh != nullptr) {
+                    delete (mGeneratedMesh);
+                    mGeneratedMesh = nullptr;
+                }
+
+                streamedBuffer.close();
+                throw DeadlyImportError("Invalid .ply file: Unable to build DOM (#2)");
+            }
+        } else {
+            if (mGeneratedMesh != nullptr) {
+                delete (mGeneratedMesh);
+                mGeneratedMesh = nullptr;
+            }
+
+            streamedBuffer.close();
+            throw DeadlyImportError("Invalid .ply file: Unknown file format");
+        }
+    } else {
+        AI_DEBUG_INVALIDATE_PTR(this->mBuffer);
+        if (mGeneratedMesh != nullptr) {
+            delete (mGeneratedMesh);
+            mGeneratedMesh = nullptr;
+        }
+
+        streamedBuffer.close();
+        throw DeadlyImportError("Invalid .ply file: Missing format specification");
+    }
+
+    //free the file buffer
+    streamedBuffer.close();
+
+    if (mGeneratedMesh == nullptr) {
+        throw DeadlyImportError("Invalid .ply file: Unable to extract mesh data ");
+    }
+
+    // if no face list is existing we assume that the vertex
+    // list is containing a list of points
+    bool pointsOnly = mGeneratedMesh->mFaces == nullptr ? true : false;
+    if (pointsOnly) {
+        mGeneratedMesh->mPrimitiveTypes = aiPrimitiveType::aiPrimitiveType_POINT;
+    }
+
+    // now load a list of all materials
+    std::vector<aiMaterial *> avMaterials;
+    std::string defaultTexture;
+    LoadMaterial(&avMaterials, defaultTexture, pointsOnly);
+
+    // now generate the output scene object. Fill the material list
+    pScene->mNumMaterials = (unsigned int)avMaterials.size();
+    pScene->mMaterials = new aiMaterial *[pScene->mNumMaterials];
+    for (unsigned int i = 0; i < pScene->mNumMaterials; ++i) {
+        pScene->mMaterials[i] = avMaterials[i];
+    }
+
+    // fill the mesh list
+    pScene->mNumMeshes = 1;
+    pScene->mMeshes = new aiMesh *[pScene->mNumMeshes];
+    pScene->mMeshes[0] = mGeneratedMesh;
+    mGeneratedMesh = nullptr;
+
+    // generate a simple node structure
+    pScene->mRootNode = new aiNode();
+    pScene->mRootNode->mNumMeshes = pScene->mNumMeshes;
+    pScene->mRootNode->mMeshes = new unsigned int[pScene->mNumMeshes];
+
+    for (unsigned int i = 0; i < pScene->mRootNode->mNumMeshes; ++i) {
+        pScene->mRootNode->mMeshes[i] = i;
+    }
+}
+
+void PLYImporter::LoadVertex(const PLY::Element *pcElement, const PLY::ElementInstance *instElement, unsigned int pos) {
+    ai_assert(nullptr != pcElement);
+    ai_assert(nullptr != instElement);
+
+    ai_uint aiPositions[3] = { 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF };
+    PLY::EDataType aiTypes[3] = { EDT_Char, EDT_Char, EDT_Char };
+
+    ai_uint aiNormal[3] = { 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF };
+    PLY::EDataType aiNormalTypes[3] = { EDT_Char, EDT_Char, EDT_Char };
+
+    unsigned int aiColors[4] = { 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF };
+    PLY::EDataType aiColorsTypes[4] = { EDT_Char, EDT_Char, EDT_Char, EDT_Char };
+
+    unsigned int aiTexcoord[2] = { 0xFFFFFFFF, 0xFFFFFFFF };
+    PLY::EDataType aiTexcoordTypes[2] = { EDT_Char, EDT_Char };
+
+    // now check whether which normal components are available
+    unsigned int _a(0), cnt(0);
+    for (std::vector<PLY::Property>::const_iterator a = pcElement->alProperties.begin();
+            a != pcElement->alProperties.end(); ++a, ++_a) {
+        if ((*a).bIsList) {
+            continue;
+        }
+
+        // Positions
+        if (PLY::EST_XCoord == (*a).Semantic) {
+            ++cnt;
+            aiPositions[0] = _a;
+            aiTypes[0] = (*a).eType;
+        } else if (PLY::EST_YCoord == (*a).Semantic) {
+            ++cnt;
+            aiPositions[1] = _a;
+            aiTypes[1] = (*a).eType;
+        } else if (PLY::EST_ZCoord == (*a).Semantic) {
+            ++cnt;
+            aiPositions[2] = _a;
+            aiTypes[2] = (*a).eType;
+        } else if (PLY::EST_XNormal == (*a).Semantic) {
+            // Normals
+            ++cnt;
+            aiNormal[0] = _a;
+            aiNormalTypes[0] = (*a).eType;
+        } else if (PLY::EST_YNormal == (*a).Semantic) {
+            ++cnt;
+            aiNormal[1] = _a;
+            aiNormalTypes[1] = (*a).eType;
+        } else if (PLY::EST_ZNormal == (*a).Semantic) {
+            ++cnt;
+            aiNormal[2] = _a;
+            aiNormalTypes[2] = (*a).eType;
+        } else if (PLY::EST_Red == (*a).Semantic) {
+            // Colors
+            ++cnt;
+            aiColors[0] = _a;
+            aiColorsTypes[0] = (*a).eType;
+        } else if (PLY::EST_Green == (*a).Semantic) {
+            ++cnt;
+            aiColors[1] = _a;
+            aiColorsTypes[1] = (*a).eType;
+        } else if (PLY::EST_Blue == (*a).Semantic) {
+            ++cnt;
+            aiColors[2] = _a;
+            aiColorsTypes[2] = (*a).eType;
+        } else if (PLY::EST_Alpha == (*a).Semantic) {
+            ++cnt;
+            aiColors[3] = _a;
+            aiColorsTypes[3] = (*a).eType;
+        } else if (PLY::EST_UTextureCoord == (*a).Semantic) {
+            // Texture coordinates
+            ++cnt;
+            aiTexcoord[0] = _a;
+            aiTexcoordTypes[0] = (*a).eType;
+        } else if (PLY::EST_VTextureCoord == (*a).Semantic) {
+            ++cnt;
+            aiTexcoord[1] = _a;
+            aiTexcoordTypes[1] = (*a).eType;
+        }
+    }
+
+    // check whether we have a valid source for the vertex data
+    if (0 != cnt) {
+        // Position
+        aiVector3D vOut;
+        if (0xFFFFFFFF != aiPositions[0]) {
+            vOut.x = PLY::PropertyInstance::ConvertTo<ai_real>(
+                    GetProperty(instElement->alProperties, aiPositions[0]).avList.front(), aiTypes[0]);
+        }
+
+        if (0xFFFFFFFF != aiPositions[1]) {
+            vOut.y = PLY::PropertyInstance::ConvertTo<ai_real>(
+                    GetProperty(instElement->alProperties, aiPositions[1]).avList.front(), aiTypes[1]);
+        }
+
+        if (0xFFFFFFFF != aiPositions[2]) {
+            vOut.z = PLY::PropertyInstance::ConvertTo<ai_real>(
+                    GetProperty(instElement->alProperties, aiPositions[2]).avList.front(), aiTypes[2]);
+        }
+
+        // Normals
+        aiVector3D nOut;
+        bool haveNormal = false;
+        if (0xFFFFFFFF != aiNormal[0]) {
+            nOut.x = PLY::PropertyInstance::ConvertTo<ai_real>(
+                    GetProperty(instElement->alProperties, aiNormal[0]).avList.front(), aiNormalTypes[0]);
+            haveNormal = true;
+        }
+
+        if (0xFFFFFFFF != aiNormal[1]) {
+            nOut.y = PLY::PropertyInstance::ConvertTo<ai_real>(
+                    GetProperty(instElement->alProperties, aiNormal[1]).avList.front(), aiNormalTypes[1]);
+            haveNormal = true;
+        }
+
+        if (0xFFFFFFFF != aiNormal[2]) {
+            nOut.z = PLY::PropertyInstance::ConvertTo<ai_real>(
+                    GetProperty(instElement->alProperties, aiNormal[2]).avList.front(), aiNormalTypes[2]);
+            haveNormal = true;
+        }
+
+        //Colors
+        aiColor4D cOut;
+        bool haveColor = false;
+        if (0xFFFFFFFF != aiColors[0]) {
+            cOut.r = NormalizeColorValue(GetProperty(instElement->alProperties,
+                                                 aiColors[0])
+                                                 .avList.front(),
+                    aiColorsTypes[0]);
+            haveColor = true;
+        }
+
+        if (0xFFFFFFFF != aiColors[1]) {
+            cOut.g = NormalizeColorValue(GetProperty(instElement->alProperties,
+                                                 aiColors[1])
+                                                 .avList.front(),
+                    aiColorsTypes[1]);
+            haveColor = true;
+        }
+
+        if (0xFFFFFFFF != aiColors[2]) {
+            cOut.b = NormalizeColorValue(GetProperty(instElement->alProperties,
+                                                 aiColors[2])
+                                                 .avList.front(),
+                    aiColorsTypes[2]);
+            haveColor = true;
+        }
+
+        // assume 1.0 for the alpha channel if it is not set
+        if (0xFFFFFFFF == aiColors[3]) {
+            cOut.a = 1.0;
+        } else {
+            cOut.a = NormalizeColorValue(GetProperty(instElement->alProperties,
+                                                 aiColors[3])
+                                                 .avList.front(),
+                    aiColorsTypes[3]);
+
+            haveColor = true;
+        }
+
+        //Texture coordinates
+        aiVector3D tOut;
+        tOut.z = 0;
+        bool haveTextureCoords = false;
+        if (0xFFFFFFFF != aiTexcoord[0]) {
+            tOut.x = PLY::PropertyInstance::ConvertTo<ai_real>(
+                    GetProperty(instElement->alProperties, aiTexcoord[0]).avList.front(), aiTexcoordTypes[0]);
+            haveTextureCoords = true;
+        }
+
+        if (0xFFFFFFFF != aiTexcoord[1]) {
+            tOut.y = PLY::PropertyInstance::ConvertTo<ai_real>(
+                    GetProperty(instElement->alProperties, aiTexcoord[1]).avList.front(), aiTexcoordTypes[1]);
+            haveTextureCoords = true;
+        }
+
+        //create aiMesh if needed
+        if (nullptr == mGeneratedMesh) {
+            mGeneratedMesh = new aiMesh();
+            mGeneratedMesh->mMaterialIndex = 0;
+        }
+
+        if (nullptr == mGeneratedMesh->mVertices) {
+            mGeneratedMesh->mNumVertices = pcElement->NumOccur;
+            mGeneratedMesh->mVertices = new aiVector3D[mGeneratedMesh->mNumVertices];
+        }
+
+        mGeneratedMesh->mVertices[pos] = vOut;
+
+        if (haveNormal) {
+            if (nullptr == mGeneratedMesh->mNormals)
+                mGeneratedMesh->mNormals = new aiVector3D[mGeneratedMesh->mNumVertices];
+            mGeneratedMesh->mNormals[pos] = nOut;
+        }
+
+        if (haveColor) {
+            if (nullptr == mGeneratedMesh->mColors[0])
+                mGeneratedMesh->mColors[0] = new aiColor4D[mGeneratedMesh->mNumVertices];
+            mGeneratedMesh->mColors[0][pos] = cOut;
+        }
+
+        if (haveTextureCoords) {
+            if (nullptr == mGeneratedMesh->mTextureCoords[0]) {
+                mGeneratedMesh->mNumUVComponents[0] = 2;
+                mGeneratedMesh->mTextureCoords[0] = new aiVector3D[mGeneratedMesh->mNumVertices];
+            }
+            mGeneratedMesh->mTextureCoords[0][pos] = tOut;
+        }
+    }
+}
+
+// ------------------------------------------------------------------------------------------------
+// Convert a color component to [0...1]
+ai_real PLYImporter::NormalizeColorValue(PLY::PropertyInstance::ValueUnion val, PLY::EDataType eType) {
+    switch (eType) {
+    case EDT_Float:
+        return val.fFloat;
+    case EDT_Double:
+        return (ai_real)val.fDouble;
+    case EDT_UChar:
+        return (ai_real)val.iUInt / (ai_real)0xFF;
+    case EDT_Char:
+        return (ai_real)(val.iInt + (0xFF / 2)) / (ai_real)0xFF;
+    case EDT_UShort:
+        return (ai_real)val.iUInt / (ai_real)0xFFFF;
+    case EDT_Short:
+        return (ai_real)(val.iInt + (0xFFFF / 2)) / (ai_real)0xFFFF;
+    case EDT_UInt:
+        return (ai_real)val.iUInt / (ai_real)0xFFFF;
+    case EDT_Int:
+        return ((ai_real)val.iInt / (ai_real)0xFF) + 0.5f;
+    default:
+        break;
+    }
+
+    return 0.0f;
+}
+
+// ------------------------------------------------------------------------------------------------
+// Try to extract proper faces from the PLY DOM
+void PLYImporter::LoadFace(const PLY::Element *pcElement, const PLY::ElementInstance *instElement,
+        unsigned int pos) {
+    ai_assert(nullptr != pcElement);
+    ai_assert(nullptr != instElement);
+
+    if (mGeneratedMesh == nullptr) {
+        throw DeadlyImportError("Invalid .ply file: Vertices should be declared before faces");
+    }
+
+    bool bOne = false;
+
+    // index of the vertex index list
+    unsigned int iProperty = 0xFFFFFFFF;
+    PLY::EDataType eType = EDT_Char;
+    bool bIsTriStrip = false;
+
+    // index of the material index property
+    //unsigned int iMaterialIndex = 0xFFFFFFFF;
+    //PLY::EDataType eType2 = EDT_Char;
+
+    // texture coordinates
+    unsigned int iTextureCoord = 0xFFFFFFFF;
+    PLY::EDataType eType3 = EDT_Char;
+
+    // face = unique number of vertex indices
+    if (PLY::EEST_Face == pcElement->eSemantic) {
+        unsigned int _a = 0;
+        for (std::vector<PLY::Property>::const_iterator a = pcElement->alProperties.begin();
+                a != pcElement->alProperties.end(); ++a, ++_a) {
+            if (PLY::EST_VertexIndex == (*a).Semantic) {
+                // must be a dynamic list!
+                if (!(*a).bIsList) {
+                    continue;
+                }
+
+                iProperty = _a;
+                bOne = true;
+                eType = (*a).eType;
+            } else if (PLY::EST_TextureCoordinates == (*a).Semantic) {
+                // must be a dynamic list!
+                if (!(*a).bIsList) {
+                    continue;
+                }
+                iTextureCoord = _a;
+                bOne = true;
+                eType3 = (*a).eType;
+            }
+        }
+    }
+    // triangle strip
+    // TODO: triangle strip and material index support???
+    else if (PLY::EEST_TriStrip == pcElement->eSemantic) {
+        unsigned int _a = 0;
+        for (std::vector<PLY::Property>::const_iterator a = pcElement->alProperties.begin();
+                a != pcElement->alProperties.end(); ++a, ++_a) {
+            // must be a dynamic list!
+            if (!(*a).bIsList) {
+                continue;
+            }
+            iProperty = _a;
+            bOne = true;
+            bIsTriStrip = true;
+            eType = (*a).eType;
+            break;
+        }
+    }
+
+    // check whether we have at least one per-face information set
+    if (bOne) {
+        if (mGeneratedMesh->mFaces == nullptr) {
+            mGeneratedMesh->mNumFaces = pcElement->NumOccur;
+            mGeneratedMesh->mFaces = new aiFace[mGeneratedMesh->mNumFaces];
+        }
+
+        if (!bIsTriStrip) {
+            // parse the list of vertex indices
+            if (0xFFFFFFFF != iProperty) {
+                const unsigned int iNum = (unsigned int)GetProperty(instElement->alProperties, iProperty).avList.size();
+                mGeneratedMesh->mFaces[pos].mNumIndices = iNum;
+                mGeneratedMesh->mFaces[pos].mIndices = new unsigned int[iNum];
+
+                std::vector<PLY::PropertyInstance::ValueUnion>::const_iterator p =
+                        GetProperty(instElement->alProperties, iProperty).avList.begin();
+
+                for (unsigned int a = 0; a < iNum; ++a, ++p) {
+                    mGeneratedMesh->mFaces[pos].mIndices[a] = PLY::PropertyInstance::ConvertTo<unsigned int>(*p, eType);
+                }
+            }
+
+            // parse the material index
+            // cannot be handled without processing the whole file first
+            /*if (0xFFFFFFFF != iMaterialIndex)
+        {
+            mGeneratedMesh->mFaces[pos]. = PLY::PropertyInstance::ConvertTo<unsigned int>(
+            GetProperty(instElement->alProperties, iMaterialIndex).avList.front(), eType2);
+        }*/
+
+            if (0xFFFFFFFF != iTextureCoord) {
+                const unsigned int iNum = (unsigned int)GetProperty(instElement->alProperties, iTextureCoord).avList.size();
+
+                //should be 6 coords
+                std::vector<PLY::PropertyInstance::ValueUnion>::const_iterator p =
+                        GetProperty(instElement->alProperties, iTextureCoord).avList.begin();
+
+                if ((iNum / 3) == 2) // X Y coord
+                {
+                    for (unsigned int a = 0; a < iNum; ++a, ++p) {
+                        unsigned int vindex = mGeneratedMesh->mFaces[pos].mIndices[a / 2];
+                        if (vindex < mGeneratedMesh->mNumVertices) {
+                            if (mGeneratedMesh->mTextureCoords[0] == nullptr) {
+                                mGeneratedMesh->mNumUVComponents[0] = 2;
+                                mGeneratedMesh->mTextureCoords[0] = new aiVector3D[mGeneratedMesh->mNumVertices];
+                            }
+
+                            if (a % 2 == 0) {
+                                mGeneratedMesh->mTextureCoords[0][vindex].x = PLY::PropertyInstance::ConvertTo<ai_real>(*p, eType3);
+                            } else {
+                                mGeneratedMesh->mTextureCoords[0][vindex].y = PLY::PropertyInstance::ConvertTo<ai_real>(*p, eType3);
+                            }
+
+                            mGeneratedMesh->mTextureCoords[0][vindex].z = 0;
+                        }
+                    }
+                }
+            }
+        } else { // triangle strips
+            // normally we have only one triangle strip instance where
+            // a value of -1 indicates a restart of the strip
+            bool flip = false;
+            const std::vector<PLY::PropertyInstance::ValueUnion> &quak = GetProperty(instElement->alProperties, iProperty).avList;
+            //pvOut->reserve(pvOut->size() + quak.size() + (quak.size()>>2u)); //Limits memory consumption
+
+            int aiTable[2] = { -1, -1 };
+            for (std::vector<PLY::PropertyInstance::ValueUnion>::const_iterator a = quak.begin(); a != quak.end(); ++a) {
+                const int p = PLY::PropertyInstance::ConvertTo<int>(*a, eType);
+
+                if (-1 == p) {
+                    // restart the strip ...
+                    aiTable[0] = aiTable[1] = -1;
+                    flip = false;
+                    continue;
+                }
+                if (-1 == aiTable[0]) {
+                    aiTable[0] = p;
+                    continue;
+                }
+                if (-1 == aiTable[1]) {
+                    aiTable[1] = p;
+                    continue;
+                }
+
+                if (mGeneratedMesh->mFaces == nullptr) {
+                    mGeneratedMesh->mNumFaces = pcElement->NumOccur;
+                    mGeneratedMesh->mFaces = new aiFace[mGeneratedMesh->mNumFaces];
+                }
+
+                mGeneratedMesh->mFaces[pos].mNumIndices = 3;
+                mGeneratedMesh->mFaces[pos].mIndices = new unsigned int[3];
+                mGeneratedMesh->mFaces[pos].mIndices[0] = aiTable[0];
+                mGeneratedMesh->mFaces[pos].mIndices[1] = aiTable[1];
+                mGeneratedMesh->mFaces[pos].mIndices[2] = p;
+
+                // every second pass swap the indices.
+                flip = !flip;
+                if (flip) {
+                    std::swap(mGeneratedMesh->mFaces[pos].mIndices[0], mGeneratedMesh->mFaces[pos].mIndices[1]);
+                }
+
+                aiTable[0] = aiTable[1];
+                aiTable[1] = p;
+            }
+        }
+    }
+}
+
+// ------------------------------------------------------------------------------------------------
+// Get a RGBA color in [0...1] range
+void PLYImporter::GetMaterialColor(const std::vector<PLY::PropertyInstance> &avList,
+        unsigned int aiPositions[4],
+        PLY::EDataType aiTypes[4],
+        aiColor4D *clrOut) {
+    ai_assert(nullptr != clrOut);
+
+    if (0xFFFFFFFF == aiPositions[0])
+        clrOut->r = 0.0f;
+    else {
+        clrOut->r = NormalizeColorValue(GetProperty(avList,
+                                                aiPositions[0])
+                                                .avList.front(),
+                aiTypes[0]);
+    }
+
+    if (0xFFFFFFFF == aiPositions[1])
+        clrOut->g = 0.0f;
+    else {
+        clrOut->g = NormalizeColorValue(GetProperty(avList,
+                                                aiPositions[1])
+                                                .avList.front(),
+                aiTypes[1]);
+    }
+
+    if (0xFFFFFFFF == aiPositions[2])
+        clrOut->b = 0.0f;
+    else {
+        clrOut->b = NormalizeColorValue(GetProperty(avList,
+                                                aiPositions[2])
+                                                .avList.front(),
+                aiTypes[2]);
+    }
+
+    // assume 1.0 for the alpha channel ifit is not set
+    if (0xFFFFFFFF == aiPositions[3])
+        clrOut->a = 1.0f;
+    else {
+        clrOut->a = NormalizeColorValue(GetProperty(avList,
+                                                aiPositions[3])
+                                                .avList.front(),
+                aiTypes[3]);
+    }
+}
+
+// ------------------------------------------------------------------------------------------------
+// Extract a material from the PLY DOM
+void PLYImporter::LoadMaterial(std::vector<aiMaterial *> *pvOut, std::string &defaultTexture, const bool pointsOnly) {
+    ai_assert(nullptr != pvOut);
+
+    // diffuse[4], specular[4], ambient[4]
+    // rgba order
+    unsigned int aaiPositions[3][4] = {
+
+        { 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF },
+        { 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF },
+        { 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF },
+    };
+
+    PLY::EDataType aaiTypes[3][4] = {
+        { EDT_Char, EDT_Char, EDT_Char, EDT_Char },
+        { EDT_Char, EDT_Char, EDT_Char, EDT_Char },
+        { EDT_Char, EDT_Char, EDT_Char, EDT_Char }
+    };
+    PLY::ElementInstanceList *pcList = nullptr;
+
+    unsigned int iPhong = 0xFFFFFFFF;
+    PLY::EDataType ePhong = EDT_Char;
+
+    unsigned int iOpacity = 0xFFFFFFFF;
+    PLY::EDataType eOpacity = EDT_Char;
+
+    // search in the DOM for a vertex entry
+    unsigned int _i = 0;
+    for (std::vector<PLY::Element>::const_iterator i = this->pcDOM->alElements.begin();
+            i != this->pcDOM->alElements.end(); ++i, ++_i) {
+        if (PLY::EEST_Material == (*i).eSemantic) {
+            pcList = &this->pcDOM->alElementData[_i];
+
+            // now check whether which coordinate sets are available
+            unsigned int _a = 0;
+            for (std::vector<PLY::Property>::const_iterator
+                            a = (*i).alProperties.begin();
+                    a != (*i).alProperties.end(); ++a, ++_a) {
+                if ((*a).bIsList) continue;
+
+                // pohng specularity      -----------------------------------
+                if (PLY::EST_PhongPower == (*a).Semantic) {
+                    iPhong = _a;
+                    ePhong = (*a).eType;
+                }
+
+                // general opacity        -----------------------------------
+                if (PLY::EST_Opacity == (*a).Semantic) {
+                    iOpacity = _a;
+                    eOpacity = (*a).eType;
+                }
+
+                // diffuse color channels -----------------------------------
+                if (PLY::EST_DiffuseRed == (*a).Semantic) {
+                    aaiPositions[0][0] = _a;
+                    aaiTypes[0][0] = (*a).eType;
+                } else if (PLY::EST_DiffuseGreen == (*a).Semantic) {
+                    aaiPositions[0][1] = _a;
+                    aaiTypes[0][1] = (*a).eType;
+                } else if (PLY::EST_DiffuseBlue == (*a).Semantic) {
+                    aaiPositions[0][2] = _a;
+                    aaiTypes[0][2] = (*a).eType;
+                } else if (PLY::EST_DiffuseAlpha == (*a).Semantic) {
+                    aaiPositions[0][3] = _a;
+                    aaiTypes[0][3] = (*a).eType;
+                }
+                // specular color channels -----------------------------------
+                else if (PLY::EST_SpecularRed == (*a).Semantic) {
+                    aaiPositions[1][0] = _a;
+                    aaiTypes[1][0] = (*a).eType;
+                } else if (PLY::EST_SpecularGreen == (*a).Semantic) {
+                    aaiPositions[1][1] = _a;
+                    aaiTypes[1][1] = (*a).eType;
+                } else if (PLY::EST_SpecularBlue == (*a).Semantic) {
+                    aaiPositions[1][2] = _a;
+                    aaiTypes[1][2] = (*a).eType;
+                } else if (PLY::EST_SpecularAlpha == (*a).Semantic) {
+                    aaiPositions[1][3] = _a;
+                    aaiTypes[1][3] = (*a).eType;
+                }
+                // ambient color channels -----------------------------------
+                else if (PLY::EST_AmbientRed == (*a).Semantic) {
+                    aaiPositions[2][0] = _a;
+                    aaiTypes[2][0] = (*a).eType;
+                } else if (PLY::EST_AmbientGreen == (*a).Semantic) {
+                    aaiPositions[2][1] = _a;
+                    aaiTypes[2][1] = (*a).eType;
+                } else if (PLY::EST_AmbientBlue == (*a).Semantic) {
+                    aaiPositions[2][2] = _a;
+                    aaiTypes[2][2] = (*a).eType;
+                } else if (PLY::EST_AmbientAlpha == (*a).Semantic) {
+                    aaiPositions[2][3] = _a;
+                    aaiTypes[2][3] = (*a).eType;
+                }
+            }
+            break;
+        } else if (PLY::EEST_TextureFile == (*i).eSemantic) {
+            defaultTexture = (*i).szName;
+        }
+    }
+    // check whether we have a valid source for the material data
+    if (nullptr != pcList) {
+        for (std::vector<ElementInstance>::const_iterator i = pcList->alInstances.begin(); i != pcList->alInstances.end(); ++i) {
+            aiColor4D clrOut;
+            aiMaterial *pcHelper = new aiMaterial();
+
+            // build the diffuse material color
+            GetMaterialColor((*i).alProperties, aaiPositions[0], aaiTypes[0], &clrOut);
+            pcHelper->AddProperty<aiColor4D>(&clrOut, 1, AI_MATKEY_COLOR_DIFFUSE);
+
+            // build the specular material color
+            GetMaterialColor((*i).alProperties, aaiPositions[1], aaiTypes[1], &clrOut);
+            pcHelper->AddProperty<aiColor4D>(&clrOut, 1, AI_MATKEY_COLOR_SPECULAR);
+
+            // build the ambient material color
+            GetMaterialColor((*i).alProperties, aaiPositions[2], aaiTypes[2], &clrOut);
+            pcHelper->AddProperty<aiColor4D>(&clrOut, 1, AI_MATKEY_COLOR_AMBIENT);
+
+            // handle phong power and shading mode
+            int iMode = (int)aiShadingMode_Gouraud;
+            if (0xFFFFFFFF != iPhong) {
+                ai_real fSpec = PLY::PropertyInstance::ConvertTo<ai_real>(GetProperty((*i).alProperties, iPhong).avList.front(), ePhong);
+
+                // if shininess is 0 (and the pow() calculation would therefore always
+                // become 1, not depending on the angle), use gouraud lighting
+                if (fSpec) {
+                    // scale this with 15 ... hopefully this is correct
+                    fSpec *= 15;
+                    pcHelper->AddProperty<ai_real>(&fSpec, 1, AI_MATKEY_SHININESS);
+
+                    iMode = (int)aiShadingMode_Phong;
+                }
+            }
+            pcHelper->AddProperty<int>(&iMode, 1, AI_MATKEY_SHADING_MODEL);
+
+            // handle opacity
+            if (0xFFFFFFFF != iOpacity) {
+                ai_real fOpacity = PLY::PropertyInstance::ConvertTo<ai_real>(GetProperty((*i).alProperties, iPhong).avList.front(), eOpacity);
+                pcHelper->AddProperty<ai_real>(&fOpacity, 1, AI_MATKEY_OPACITY);
+            }
+
+            // The face order is absolutely undefined for PLY, so we have to
+            // use two-sided rendering to be sure it's ok.
+            const int two_sided = 1;
+            pcHelper->AddProperty(&two_sided, 1, AI_MATKEY_TWOSIDED);
+
+            //default texture
+            if (!defaultTexture.empty()) {
+                const aiString name(defaultTexture.c_str());
+                pcHelper->AddProperty(&name, _AI_MATKEY_TEXTURE_BASE, aiTextureType_DIFFUSE, 0);
+            }
+
+            if (!pointsOnly) {
+                pcHelper->AddProperty(&two_sided, 1, AI_MATKEY_TWOSIDED);
+            }
+
+            //set to wireframe, so when using this material info we can switch to points rendering
+            if (pointsOnly) {
+                const int wireframe = 1;
+                pcHelper->AddProperty(&wireframe, 1, AI_MATKEY_ENABLE_WIREFRAME);
+            }
+
+            // add the newly created material instance to the list
+            pvOut->push_back(pcHelper);
+        }
+    } else {
+        // generate a default material
+        aiMaterial *pcHelper = new aiMaterial();
+
+        // fill in a default material
+        int iMode = (int)aiShadingMode_Gouraud;
+        pcHelper->AddProperty<int>(&iMode, 1, AI_MATKEY_SHADING_MODEL);
+
+        //generate white material most 3D engine just multiply ambient / diffuse color with actual ambient / light color
+        aiColor3D clr;
+        clr.b = clr.g = clr.r = 1.0f;
+        pcHelper->AddProperty<aiColor3D>(&clr, 1, AI_MATKEY_COLOR_DIFFUSE);
+        pcHelper->AddProperty<aiColor3D>(&clr, 1, AI_MATKEY_COLOR_SPECULAR);
+
+        clr.b = clr.g = clr.r = 1.0f;
+        pcHelper->AddProperty<aiColor3D>(&clr, 1, AI_MATKEY_COLOR_AMBIENT);
+
+        // The face order is absolutely undefined for PLY, so we have to
+        // use two-sided rendering to be sure it's ok.
+        if (!pointsOnly) {
+            const int two_sided = 1;
+            pcHelper->AddProperty(&two_sided, 1, AI_MATKEY_TWOSIDED);
+        }
+
+        //default texture
+        if (!defaultTexture.empty()) {
+            const aiString name(defaultTexture.c_str());
+            pcHelper->AddProperty(&name, _AI_MATKEY_TEXTURE_BASE, aiTextureType_DIFFUSE, 0);
+        }
+
+        //set to wireframe, so when using this material info we can switch to points rendering
+        if (pointsOnly) {
+            const int wireframe = 1;
+            pcHelper->AddProperty(&wireframe, 1, AI_MATKEY_ENABLE_WIREFRAME);
+        }
+
+        pvOut->push_back(pcHelper);
+    }
+}
+
+#endif // !! ASSIMP_BUILD_NO_PLY_IMPORTER