code/NFF/NFFLoader.cpp

/*
---------------------------------------------------------------------------
Open Asset Import Library (assimp)
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  following disclaimer.

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*/

/** @file Implementation of the STL importer class */


#ifndef ASSIMP_BUILD_NO_NFF_IMPORTER

// internal headers
#include "NFFLoader.h"
#include <assimp/ParsingUtils.h>
#include <assimp/StandardShapes.h>
#include <assimp/qnan.h>
#include <assimp/fast_atof.h>
#include <assimp/RemoveComments.h>
#include <assimp/IOSystem.hpp>
#include <assimp/DefaultLogger.hpp>
#include <assimp/scene.h>
#include <assimp/importerdesc.h>
#include <memory>


using namespace Assimp;

static const aiImporterDesc desc = {
    "Neutral File Format Importer",
    "",
    "",
    "",
    aiImporterFlags_SupportBinaryFlavour,
    0,
    0,
    0,
    0,
    "enff nff"
};

// ------------------------------------------------------------------------------------------------
// Constructor to be privately used by Importer
NFFImporter::NFFImporter()
{}

// ------------------------------------------------------------------------------------------------
// Destructor, private as well
NFFImporter::~NFFImporter()
{}

// ------------------------------------------------------------------------------------------------
// Returns whether the class can handle the format of the given file.
bool NFFImporter::CanRead( const std::string& pFile, IOSystem* /*pIOHandler*/, bool /*checkSig*/) const
{
    return SimpleExtensionCheck(pFile,"nff","enff");
}

// ------------------------------------------------------------------------------------------------
// Get the list of all supported file extensions
const aiImporterDesc* NFFImporter::GetInfo () const
{
    return &desc;
}

// ------------------------------------------------------------------------------------------------
#define AI_NFF_PARSE_FLOAT(f) \
    SkipSpaces(&sz); \
    if (!::IsLineEnd(*sz))sz = fast_atoreal_move<float>(sz, (float&)f);

// ------------------------------------------------------------------------------------------------
#define AI_NFF_PARSE_TRIPLE(v) \
    AI_NFF_PARSE_FLOAT(v[0]) \
    AI_NFF_PARSE_FLOAT(v[1]) \
    AI_NFF_PARSE_FLOAT(v[2])

// ------------------------------------------------------------------------------------------------
#define AI_NFF_PARSE_SHAPE_INFORMATION() \
    aiVector3D center, radius(1.0f,get_qnan(),get_qnan()); \
    AI_NFF_PARSE_TRIPLE(center); \
    AI_NFF_PARSE_TRIPLE(radius); \
    if (is_qnan(radius.z))radius.z = radius.x; \
    if (is_qnan(radius.y))radius.y = radius.x; \
    currentMesh.radius = radius; \
    currentMesh.center = center;

// ------------------------------------------------------------------------------------------------
#define AI_NFF2_GET_NEXT_TOKEN() \
    do \
    { \
    if (!GetNextLine(buffer,line)) \
        {ASSIMP_LOG_WARN("NFF2: Unexpected EOF, can't read next token");break;} \
    SkipSpaces(line,&sz); \
    } \
    while(IsLineEnd(*sz))


// ------------------------------------------------------------------------------------------------
// Loads the material table for the NFF2 file format from an external file
void NFFImporter::LoadNFF2MaterialTable(std::vector<ShadingInfo>& output,
    const std::string& path, IOSystem* pIOHandler)
{
    std::unique_ptr<IOStream> file( pIOHandler->Open( path, "rb"));

    // Check whether we can read from the file
    if( !file.get())    {
        ASSIMP_LOG_ERROR("NFF2: Unable to open material library " + path + ".");
        return;
    }

    // get the size of the file
    const unsigned int m = (unsigned int)file->FileSize();

    // allocate storage and copy the contents of the file to a memory buffer
    // (terminate it with zero)
    std::vector<char> mBuffer2(m+1);
    TextFileToBuffer(file.get(),mBuffer2);
    const char* buffer = &mBuffer2[0];

    // First of all: remove all comments from the file
    CommentRemover::RemoveLineComments("//",&mBuffer2[0]);

    // The file should start with the magic sequence "mat"
    if (!TokenMatch(buffer,"mat",3))    {
        ASSIMP_LOG_ERROR_F("NFF2: Not a valid material library ", path, ".");
        return;
    }

    ShadingInfo* curShader = NULL;

    // No read the file line per line
    char line[4096];
    const char* sz;
    while (GetNextLine(buffer,line))
    {
        SkipSpaces(line,&sz);

        // 'version' defines the version of the file format
        if (TokenMatch(sz,"version",7))
        {
            ASSIMP_LOG_INFO_F("NFF (Sense8) material library file format: ", std::string(sz));
        }
        // 'matdef' starts a new material in the file
        else if (TokenMatch(sz,"matdef",6))
        {
            // add a new material to the list
            output.push_back( ShadingInfo() );
            curShader = & output.back();

            // parse the name of the material
        }
        else if (!TokenMatch(sz,"valid",5))
        {
            // check whether we have an active material at the moment
            if (!IsLineEnd(*sz))
            {
                if (!curShader)
                {
                    ASSIMP_LOG_ERROR_F("NFF2 material library: Found element ", sz, "but there is no active material");
                    continue;
                }
            }
            else continue;

            // now read the material property and determine its type
            aiColor3D c;
            if (TokenMatch(sz,"ambient",7))
            {
                AI_NFF_PARSE_TRIPLE(c);
                curShader->ambient = c;
            }
            else if (TokenMatch(sz,"diffuse",7) || TokenMatch(sz,"ambientdiffuse",14) /* correct? */)
            {
                AI_NFF_PARSE_TRIPLE(c);
                curShader->diffuse = curShader->ambient = c;
            }
            else if (TokenMatch(sz,"specular",8))
            {
                AI_NFF_PARSE_TRIPLE(c);
                curShader->specular = c;
            }
            else if (TokenMatch(sz,"emission",8))
            {
                AI_NFF_PARSE_TRIPLE(c);
                curShader->emissive = c;
            }
            else if (TokenMatch(sz,"shininess",9))
            {
                AI_NFF_PARSE_FLOAT(curShader->shininess);
            }
            else if (TokenMatch(sz,"opacity",7))
            {
                AI_NFF_PARSE_FLOAT(curShader->opacity);
            }
        }
    }
}

// ------------------------------------------------------------------------------------------------
// Imports the given file into the given scene structure.
void NFFImporter::InternReadFile( const std::string& pFile,
    aiScene* pScene, IOSystem* pIOHandler)
{
    std::unique_ptr<IOStream> file( pIOHandler->Open( pFile, "rb"));

    // Check whether we can read from the file
    if( !file.get())
        throw DeadlyImportError( "Failed to open NFF file " + pFile + ".");

    // allocate storage and copy the contents of the file to a memory buffer
    // (terminate it with zero)
    std::vector<char> mBuffer2;
    TextFileToBuffer(file.get(),mBuffer2);
    const char* buffer = &mBuffer2[0];

    // mesh arrays - separate here to make the handling of the pointers below easier.
    std::vector<MeshInfo> meshes;
    std::vector<MeshInfo> meshesWithNormals;
    std::vector<MeshInfo> meshesWithUVCoords;
    std::vector<MeshInfo> meshesLocked;

    char line[4096];
    const char* sz;

    // camera parameters
    aiVector3D camPos, camUp(0.f,1.f,0.f), camLookAt(0.f,0.f,1.f);
    float angle = 45.f;
    aiVector2D resolution;

    bool hasCam = false;

    MeshInfo* currentMeshWithNormals = NULL;
    MeshInfo* currentMesh = NULL;
    MeshInfo* currentMeshWithUVCoords = NULL;

    ShadingInfo s; // current material info

    // degree of tessellation
    unsigned int iTesselation = 4;

    // some temporary variables we need to parse the file
    unsigned int sphere     = 0,
        cylinder            = 0,
        cone                = 0,
        numNamed            = 0,
        dodecahedron        = 0,
        octahedron          = 0,
        tetrahedron         = 0,
        hexahedron          = 0;

    // lights imported from the file
    std::vector<Light> lights;

    // check whether this is the NFF2 file format
    if (TokenMatch(buffer,"nff",3))
    {
        const float qnan = get_qnan();
        const aiColor4D  cQNAN = aiColor4D (qnan,0.f,0.f,1.f);
        const aiVector3D vQNAN = aiVector3D(qnan,0.f,0.f);

        // another NFF file format ... just a raw parser has been implemented
        // no support for further details, I don't think it is worth the effort
        // http://ozviz.wasp.uwa.edu.au/~pbourke/dataformats/nff/nff2.html
        // http://www.netghost.narod.ru/gff/graphics/summary/sense8.htm

        // First of all: remove all comments from the file
        CommentRemover::RemoveLineComments("//",&mBuffer2[0]);

        while (GetNextLine(buffer,line))
        {
            SkipSpaces(line,&sz);
            if (TokenMatch(sz,"version",7))
            {
                ASSIMP_LOG_INFO_F("NFF (Sense8) file format: ", sz );
            }
            else if (TokenMatch(sz,"viewpos",7))
            {
                AI_NFF_PARSE_TRIPLE(camPos);
                hasCam = true;
            }
            else if (TokenMatch(sz,"viewdir",7))
            {
                AI_NFF_PARSE_TRIPLE(camLookAt);
                hasCam = true;
            }
            // This starts a new object section
            else if (!IsSpaceOrNewLine(*sz))
            {
                unsigned int subMeshIdx = 0;

                // read the name of the object, skip all spaces
                // at the end of it.
                const char* sz3 = sz;
                while (!IsSpaceOrNewLine(*sz))++sz;
                std::string objectName = std::string(sz3,(unsigned int)(sz-sz3));

                const unsigned int objStart = (unsigned int)meshes.size();

                // There could be a material table in a separate file
                std::vector<ShadingInfo> materialTable;
                while (true)
                {
                    AI_NFF2_GET_NEXT_TOKEN();

                    // material table - an external file
                    if (TokenMatch(sz,"mtable",6))
                    {
                        SkipSpaces(&sz);
                        sz3 = sz;
                        while (!IsSpaceOrNewLine(*sz))++sz;
                        const unsigned int diff = (unsigned int)(sz-sz3);
                        if (!diff)ASSIMP_LOG_WARN("NFF2: Found empty mtable token");
                        else
                        {
                            // The material table has the file extension .mat.
                            // If it is not there, we need to append it
                            std::string path = std::string(sz3,diff);
                            if(std::string::npos == path.find_last_of(".mat"))
                            {
                                path.append(".mat");
                            }

                            // Now extract the working directory from the path to
                            // this file and append the material library filename
                            // to it.
                            std::string::size_type s;
                            if ((std::string::npos == (s = path.find_last_of('\\')) || !s) &&
                                (std::string::npos == (s = path.find_last_of('/'))  || !s) )
                            {
                                s = pFile.find_last_of('\\');
                                if (std::string::npos == s)s = pFile.find_last_of('/');
                                if (std::string::npos != s)
                                {
                                    path = pFile.substr(0,s+1) + path;
                                }
                            }
                            LoadNFF2MaterialTable(materialTable,path,pIOHandler);
                        }
                    }
                    else break;
                }

                // read the numbr of vertices
                unsigned int num = ::strtoul10(sz,&sz);

                // temporary storage
                std::vector<aiColor4D>  tempColors;
                std::vector<aiVector3D> tempPositions,tempTextureCoords,tempNormals;

                bool hasNormals = false,hasUVs = false,hasColor = false;

                tempPositions.reserve      (num);
                tempColors.reserve         (num);
                tempNormals.reserve        (num);
                tempTextureCoords.reserve  (num);
                for (unsigned int i = 0; i < num; ++i)
                {
                    AI_NFF2_GET_NEXT_TOKEN();
                    aiVector3D v;
                    AI_NFF_PARSE_TRIPLE(v);
                    tempPositions.push_back(v);

                    // parse all other attributes in the line
                    while (true)
                    {
                        SkipSpaces(&sz);
                        if (IsLineEnd(*sz))break;

                        // color definition
                        if (TokenMatch(sz,"0x",2))
                        {
                            hasColor = true;
                            unsigned int numIdx = ::strtoul16(sz,&sz);
                            aiColor4D clr;
                            clr.a = 1.f;

                            // 0xRRGGBB
                            clr.r = ((numIdx >> 16u) & 0xff) / 255.f;
                            clr.g = ((numIdx >> 8u)  & 0xff) / 255.f;
                            clr.b = ((numIdx)        & 0xff) / 255.f;
                            tempColors.push_back(clr);
                        }
                        // normal vector
                        else if (TokenMatch(sz,"norm",4))
                        {
                            hasNormals = true;
                            AI_NFF_PARSE_TRIPLE(v);
                            tempNormals.push_back(v);
                        }
                        // UV coordinate
                        else if (TokenMatch(sz,"uv",2))
                        {
                            hasUVs = true;
                            AI_NFF_PARSE_FLOAT(v.x);
                            AI_NFF_PARSE_FLOAT(v.y);
                            v.z = 0.f;
                            tempTextureCoords.push_back(v);
                        }
                    }

                    // fill in dummies for all attributes that have not been set
                    if (tempNormals.size() != tempPositions.size())
                        tempNormals.push_back(vQNAN);

                    if (tempTextureCoords.size() != tempPositions.size())
                        tempTextureCoords.push_back(vQNAN);

                    if (tempColors.size() != tempPositions.size())
                        tempColors.push_back(cQNAN);
                }

                AI_NFF2_GET_NEXT_TOKEN();
                if (!num)throw DeadlyImportError("NFF2: There are zero vertices");
                num = ::strtoul10(sz,&sz);

                std::vector<unsigned int> tempIdx;
                tempIdx.reserve(10);
                for (unsigned int i = 0; i < num; ++i)
                {
                    AI_NFF2_GET_NEXT_TOKEN();
                    SkipSpaces(line,&sz);
                    unsigned int numIdx = ::strtoul10(sz,&sz);

                    // read all faces indices
                    if (numIdx)
                    {
                        // mesh.faces.push_back(numIdx);
                        // tempIdx.erase(tempIdx.begin(),tempIdx.end());
                        tempIdx.resize(numIdx);

                        for (unsigned int a = 0; a < numIdx;++a)
                        {
                            SkipSpaces(sz,&sz);
                            unsigned int m = ::strtoul10(sz,&sz);
                            if (m >= (unsigned int)tempPositions.size())
                            {
                                ASSIMP_LOG_ERROR("NFF2: Vertex index overflow");
                                m= 0;
                            }
                            // mesh.vertices.push_back (tempPositions[idx]);
                            tempIdx[a] = m;
                        }
                    }

                    // build a temporary shader object for the face.
                    ShadingInfo shader;
                    unsigned int matIdx = 0;

                    // white material color - we have vertex colors
                    shader.color = aiColor3D(1.f,1.f,1.f);
                    aiColor4D c  = aiColor4D(1.f,1.f,1.f,1.f);
                    while (true)
                    {
                        SkipSpaces(sz,&sz);
                        if(IsLineEnd(*sz))break;

                        // per-polygon colors
                        if (TokenMatch(sz,"0x",2))
                        {
                            hasColor = true;
                            const char* sz2 = sz;
                            numIdx = ::strtoul16(sz,&sz);
                            const unsigned int diff = (unsigned int)(sz-sz2);

                            // 0xRRGGBB
                            if (diff > 3)
                            {
                                c.r = ((numIdx >> 16u) & 0xff) / 255.f;
                                c.g = ((numIdx >> 8u)  & 0xff) / 255.f;
                                c.b = ((numIdx)        & 0xff) / 255.f;
                            }
                            // 0xRGB
                            else
                            {
                                c.r = ((numIdx >> 8u) & 0xf) / 16.f;
                                c.g = ((numIdx >> 4u) & 0xf) / 16.f;
                                c.b = ((numIdx)       & 0xf) / 16.f;
                            }
                        }
                        // TODO - implement texture mapping here
#if 0
                        // mirror vertex texture coordinate?
                        else if (TokenMatch(sz,"mirror",6))
                        {
                        }
                        // texture coordinate scaling
                        else if (TokenMatch(sz,"scale",5))
                        {
                        }
                        // texture coordinate translation
                        else if (TokenMatch(sz,"trans",5))
                        {
                        }
                        // texture coordinate rotation angle
                        else if (TokenMatch(sz,"rot",3))
                        {
                        }
#endif

                        // texture file name for this polygon + mapping information
                        else if ('_' == sz[0])
                        {
                            // get mapping information
                            switch (sz[1])
                            {
                            case 'v':
                            case 'V':

                                shader.shaded = false;
                                break;

                            case 't':
                            case 'T':
                            case 'u':
                            case 'U':

                                ASSIMP_LOG_WARN("Unsupported NFF2 texture attribute: trans");
                            };
                            if (!sz[1] || '_' != sz[2])
                            {
                                ASSIMP_LOG_WARN("NFF2: Expected underscore after texture attributes");
                                continue;
                            }
                            const char* sz2 = sz+3;
                            while (!IsSpaceOrNewLine( *sz ))++sz;
                            const unsigned int diff = (unsigned int)(sz-sz2);
                            if (diff)shader.texFile = std::string(sz2,diff);
                        }

                        // Two-sided material?
                        else if (TokenMatch(sz,"both",4))
                        {
                            shader.twoSided = true;
                        }

                        // Material ID?
                        else if (!materialTable.empty() && TokenMatch(sz,"matid",5))
                        {
                            SkipSpaces(&sz);
                            matIdx = ::strtoul10(sz,&sz);
                            if (matIdx >= materialTable.size())
                            {
                                ASSIMP_LOG_ERROR("NFF2: Material index overflow.");
                                matIdx = 0;
                            }

                            // now combine our current shader with the shader we
                            // read from the material table.
                            ShadingInfo& mat = materialTable[matIdx];
                            shader.ambient   = mat.ambient;
                            shader.diffuse   = mat.diffuse;
                            shader.emissive  = mat.emissive;
                            shader.opacity   = mat.opacity;
                            shader.specular  = mat.specular;
                            shader.shininess = mat.shininess;
                        }
                        else SkipToken(sz);
                    }

                    // search the list of all shaders we have for this object whether
                    // there is an identical one. In this case, we append our mesh
                    // data to it.
                    MeshInfo* mesh = NULL;
                    for (std::vector<MeshInfo>::iterator it = meshes.begin() + objStart, end = meshes.end();
                         it != end; ++it)
                    {
                        if ((*it).shader == shader && (*it).matIndex == matIdx)
                        {
                            // we have one, we can append our data to it
                            mesh = &(*it);
                        }
                    }
                    if (!mesh)
                    {
                        meshes.push_back(MeshInfo(PatchType_Simple,false));
                        mesh = &meshes.back();
                        mesh->matIndex = matIdx;

                        // We need to add a new mesh to the list. We assign
                        // an unique name to it to make sure the scene will
                        // pass the validation step for the moment.
                        // TODO: fix naming of objects in the scenegraph later
                        if (objectName.length())
                        {
                            ::strcpy(mesh->name,objectName.c_str());
                            ASSIMP_itoa10(&mesh->name[objectName.length()],30,subMeshIdx++);
                        }

                        // copy the shader to the mesh.
                        mesh->shader = shader;
                    }

                    // fill the mesh with data
                    if (!tempIdx.empty())
                    {
                        mesh->faces.push_back((unsigned int)tempIdx.size());
                        for (std::vector<unsigned int>::const_iterator it = tempIdx.begin(), end = tempIdx.end();
                            it != end;++it)
                        {
                            unsigned int m = *it;

                            // copy colors -vertex color specifications override polygon color specifications
                            if (hasColor)
                            {
                                const aiColor4D& clr = tempColors[m];
                                mesh->colors.push_back((is_qnan( clr.r ) ? c : clr));
                            }

                            // positions should always be there
                            mesh->vertices.push_back (tempPositions[m]);

                            // copy normal vectors
                            if (hasNormals)
                                mesh->normals.push_back  (tempNormals[m]);

                            // copy texture coordinates
                            if (hasUVs)
                                mesh->uvs.push_back      (tempTextureCoords[m]);
                        }
                    }
                }
                if (!num)throw DeadlyImportError("NFF2: There are zero faces");
            }
        }
        camLookAt = camLookAt + camPos;
    }
    else // "Normal" Neutral file format that is quite more common
    {
        while (GetNextLine(buffer,line))
        {
            sz = line;
            if ('p' == line[0] || TokenMatch(sz,"tpp",3))
            {
                MeshInfo* out = NULL;

                // 'tpp' - texture polygon patch primitive
                if ('t' == line[0])
                {
                    currentMeshWithUVCoords = NULL;
                    for (auto &mesh : meshesWithUVCoords)
                    {
                        if (mesh.shader == s)
                        {
                            currentMeshWithUVCoords = &mesh;
                            break;
                        }
                    }

                    if (!currentMeshWithUVCoords)
                    {
                        meshesWithUVCoords.push_back(MeshInfo(PatchType_UVAndNormals));
                        currentMeshWithUVCoords = &meshesWithUVCoords.back();
                        currentMeshWithUVCoords->shader = s;
                    }
                    out = currentMeshWithUVCoords;
                }
                // 'pp' - polygon patch primitive
                else if ('p' == line[1])
                {
                    currentMeshWithNormals = NULL;
                    for (auto &mesh : meshesWithNormals)
                    {
                        if (mesh.shader == s)
                        {
                            currentMeshWithNormals = &mesh;
                            break;
                        }
                    }

                    if (!currentMeshWithNormals)
                    {
                        meshesWithNormals.push_back(MeshInfo(PatchType_Normals));
                        currentMeshWithNormals = &meshesWithNormals.back();
                        currentMeshWithNormals->shader = s;
                    }
                    sz = &line[2];out = currentMeshWithNormals;
                }
                // 'p' - polygon primitive
                else
                {
                    currentMesh = NULL;
                    for (auto &mesh : meshes)
                    {
                        if (mesh.shader == s)
                        {
                            currentMesh = &mesh;
                            break;
                        }
                    }

                    if (!currentMesh)
                    {
                        meshes.push_back(MeshInfo(PatchType_Simple));
                        currentMesh = &meshes.back();
                        currentMesh->shader = s;
                    }
                    sz = &line[1];out = currentMesh;
                }
                SkipSpaces(sz,&sz);
                unsigned int m = strtoul10(sz);

                // ---- flip the face order
                out->vertices.resize(out->vertices.size()+m);
                if (out != currentMesh)
                {
                    out->normals.resize(out->vertices.size());
                }
                if (out == currentMeshWithUVCoords)
                {
                    out->uvs.resize(out->vertices.size());
                }
                for (unsigned int n = 0; n < m;++n)
                {
                    if(!GetNextLine(buffer,line))
                    {
                        ASSIMP_LOG_ERROR("NFF: Unexpected EOF was encountered. Patch definition incomplete");
                        continue;
                    }

                    aiVector3D v; sz = &line[0];
                    AI_NFF_PARSE_TRIPLE(v);
                    out->vertices[out->vertices.size()-n-1] = v;

                    if (out != currentMesh)
                    {
                        AI_NFF_PARSE_TRIPLE(v);
                        out->normals[out->vertices.size()-n-1] = v;
                    }
                    if (out == currentMeshWithUVCoords)
                    {
                        // FIX: in one test file this wraps over multiple lines
                        SkipSpaces(&sz);
                        if (IsLineEnd(*sz))
                        {
                            GetNextLine(buffer,line);
                            sz = line;
                        }
                        AI_NFF_PARSE_FLOAT(v.x);
                        SkipSpaces(&sz);
                        if (IsLineEnd(*sz))
                        {
                            GetNextLine(buffer,line);
                            sz = line;
                        }
                        AI_NFF_PARSE_FLOAT(v.y);
                        v.y = 1.f - v.y;
                        out->uvs[out->vertices.size()-n-1] = v;
                    }
                }
                out->faces.push_back(m);
            }
            // 'f' - shading information block
            else if (TokenMatch(sz,"f",1))
            {
                float d;

                // read the RGB colors
                AI_NFF_PARSE_TRIPLE(s.color);

                // read the other properties
                AI_NFF_PARSE_FLOAT(s.diffuse.r);
                AI_NFF_PARSE_FLOAT(s.specular.r);
                AI_NFF_PARSE_FLOAT(d); // skip shininess and transmittance
                AI_NFF_PARSE_FLOAT(d);
                AI_NFF_PARSE_FLOAT(s.refracti);

                // NFF2 uses full colors here so we need to use them too
                // although NFF uses simple scaling factors
                s.diffuse.g  = s.diffuse.b = s.diffuse.r;
                s.specular.g = s.specular.b = s.specular.r;

                // if the next one is NOT a number we assume it is a texture file name
                // this feature is used by some NFF files on the internet and it has
                // been implemented as it can be really useful
                SkipSpaces(&sz);
                if (!IsNumeric(*sz))
                {
                    // TODO: Support full file names with spaces and quotation marks ...
                    const char* p = sz;
                    while (!IsSpaceOrNewLine( *sz ))++sz;

                    unsigned int diff = (unsigned int)(sz-p);
                    if (diff)
                    {
                        s.texFile = std::string(p,diff);
                    }
                }
                else
                {
                    AI_NFF_PARSE_FLOAT(s.ambient); // optional
                }
            }
            // 'shader' - other way to specify a texture
            else if (TokenMatch(sz,"shader",6))
            {
                SkipSpaces(&sz);
                const char* old = sz;
                while (!IsSpaceOrNewLine(*sz))++sz;
                s.texFile = std::string(old, (uintptr_t)sz - (uintptr_t)old);
            }
            // 'l' - light source
            else if (TokenMatch(sz,"l",1))
            {
                lights.push_back(Light());
                Light& light = lights.back();

                AI_NFF_PARSE_TRIPLE(light.position);
                AI_NFF_PARSE_FLOAT (light.intensity);
                AI_NFF_PARSE_TRIPLE(light.color);
            }
            // 's' - sphere
            else if (TokenMatch(sz,"s",1))
            {
                meshesLocked.push_back(MeshInfo(PatchType_Simple,true));
                MeshInfo& currentMesh = meshesLocked.back();
                currentMesh.shader = s;
                currentMesh.shader.mapping = aiTextureMapping_SPHERE;

                AI_NFF_PARSE_SHAPE_INFORMATION();

                // we don't need scaling or translation here - we do it in the node's transform
                StandardShapes::MakeSphere(iTesselation, currentMesh.vertices);
                currentMesh.faces.resize(currentMesh.vertices.size()/3,3);

                // generate a name for the mesh
                ::ai_snprintf(currentMesh.name,128,"sphere_%i",sphere++);
            }
            // 'dod' - dodecahedron
            else if (TokenMatch(sz,"dod",3))
            {
                meshesLocked.push_back(MeshInfo(PatchType_Simple,true));
                MeshInfo& currentMesh = meshesLocked.back();
                currentMesh.shader = s;
                currentMesh.shader.mapping = aiTextureMapping_SPHERE;

                AI_NFF_PARSE_SHAPE_INFORMATION();

                // we don't need scaling or translation here - we do it in the node's transform
                StandardShapes::MakeDodecahedron(currentMesh.vertices);
                currentMesh.faces.resize(currentMesh.vertices.size()/3,3);

                // generate a name for the mesh
                ::ai_snprintf(currentMesh.name,128,"dodecahedron_%i",dodecahedron++);
            }

            // 'oct' - octahedron
            else if (TokenMatch(sz,"oct",3))
            {
                meshesLocked.push_back(MeshInfo(PatchType_Simple,true));
                MeshInfo& currentMesh = meshesLocked.back();
                currentMesh.shader = s;
                currentMesh.shader.mapping = aiTextureMapping_SPHERE;

                AI_NFF_PARSE_SHAPE_INFORMATION();

                // we don't need scaling or translation here - we do it in the node's transform
                StandardShapes::MakeOctahedron(currentMesh.vertices);
                currentMesh.faces.resize(currentMesh.vertices.size()/3,3);

                // generate a name for the mesh
                ::ai_snprintf(currentMesh.name,128,"octahedron_%i",octahedron++);
            }

            // 'tet' - tetrahedron
            else if (TokenMatch(sz,"tet",3))
            {
                meshesLocked.push_back(MeshInfo(PatchType_Simple,true));
                MeshInfo& currentMesh = meshesLocked.back();
                currentMesh.shader = s;
                currentMesh.shader.mapping = aiTextureMapping_SPHERE;

                AI_NFF_PARSE_SHAPE_INFORMATION();

                // we don't need scaling or translation here - we do it in the node's transform
                StandardShapes::MakeTetrahedron(currentMesh.vertices);
                currentMesh.faces.resize(currentMesh.vertices.size()/3,3);

                // generate a name for the mesh
                ::ai_snprintf(currentMesh.name,128,"tetrahedron_%i",tetrahedron++);
            }

            // 'hex' - hexahedron
            else if (TokenMatch(sz,"hex",3))
            {
                meshesLocked.push_back(MeshInfo(PatchType_Simple,true));
                MeshInfo& currentMesh = meshesLocked.back();
                currentMesh.shader = s;
                currentMesh.shader.mapping = aiTextureMapping_BOX;

                AI_NFF_PARSE_SHAPE_INFORMATION();

                // we don't need scaling or translation here - we do it in the node's transform
                StandardShapes::MakeHexahedron(currentMesh.vertices);
                currentMesh.faces.resize(currentMesh.vertices.size()/3,3);

                // generate a name for the mesh
                ::ai_snprintf(currentMesh.name,128,"hexahedron_%i",hexahedron++);
            }
            // 'c' - cone
            else if (TokenMatch(sz,"c",1))
            {
                meshesLocked.push_back(MeshInfo(PatchType_Simple,true));
                MeshInfo& currentMesh = meshesLocked.back();
                currentMesh.shader = s;
                currentMesh.shader.mapping = aiTextureMapping_CYLINDER;

                if(!GetNextLine(buffer,line))
                {
                    ASSIMP_LOG_ERROR("NFF: Unexpected end of file (cone definition not complete)");
                    break;
                }
                sz = line;

                // read the two center points and the respective radii
                aiVector3D center1, center2; float radius1, radius2;
                AI_NFF_PARSE_TRIPLE(center1);
                AI_NFF_PARSE_FLOAT(radius1);

                if(!GetNextLine(buffer,line))
                {
                    ASSIMP_LOG_ERROR("NFF: Unexpected end of file (cone definition not complete)");
                    break;
                }
                sz = line;

                AI_NFF_PARSE_TRIPLE(center2);
                AI_NFF_PARSE_FLOAT(radius2);

                // compute the center point of the cone/cylinder -
                // it is its local transformation origin
                currentMesh.dir    =  center2-center1;
                currentMesh.center =  center1+currentMesh.dir/(ai_real)2.0;

                float f;
                if (( f = currentMesh.dir.Length()) < 10e-3f )
                {
                    ASSIMP_LOG_ERROR("NFF: Cone height is close to zero");
                    continue;
                }
                currentMesh.dir /= f; // normalize

                // generate the cone - it consists of simple triangles
                StandardShapes::MakeCone(f, radius1, radius2,
                    integer_pow(4, iTesselation), currentMesh.vertices);

                // MakeCone() returns tris
                currentMesh.faces.resize(currentMesh.vertices.size()/3,3);

                // generate a name for the mesh. 'cone' if it a cone,
                // 'cylinder' if it is a cylinder. Funny, isn't it?
                if (radius1 != radius2)
                    ::ai_snprintf(currentMesh.name,128,"cone_%i",cone++);
                else ::ai_snprintf(currentMesh.name,128,"cylinder_%i",cylinder++);
            }
            // 'tess' - tessellation
            else if (TokenMatch(sz,"tess",4))
            {
                SkipSpaces(&sz);
                iTesselation = strtoul10(sz);
            }
            // 'from' - camera position
            else if (TokenMatch(sz,"from",4))
            {
                AI_NFF_PARSE_TRIPLE(camPos);
                hasCam = true;
            }
            // 'at' - camera look-at vector
            else if (TokenMatch(sz,"at",2))
            {
                AI_NFF_PARSE_TRIPLE(camLookAt);
                hasCam = true;
            }
            // 'up' - camera up vector
            else if (TokenMatch(sz,"up",2))
            {
                AI_NFF_PARSE_TRIPLE(camUp);
                hasCam = true;
            }
            // 'angle' - (half?) camera field of view
            else if (TokenMatch(sz,"angle",5))
            {
                AI_NFF_PARSE_FLOAT(angle);
                hasCam = true;
            }
            // 'resolution' - used to compute the screen aspect
            else if (TokenMatch(sz,"resolution",10))
            {
                AI_NFF_PARSE_FLOAT(resolution.x);
                AI_NFF_PARSE_FLOAT(resolution.y);
                hasCam = true;
            }
            // 'pb' - bezier patch. Not supported yet
            else if (TokenMatch(sz,"pb",2))
            {
                ASSIMP_LOG_ERROR("NFF: Encountered unsupported ID: bezier patch");
            }
            // 'pn' - NURBS. Not supported yet
            else if (TokenMatch(sz,"pn",2) || TokenMatch(sz,"pnn",3))
            {
                ASSIMP_LOG_ERROR("NFF: Encountered unsupported ID: NURBS");
            }
            // '' - comment
            else if ('#' == line[0])
            {
                const char* sz;SkipSpaces(&line[1],&sz);
                if (!IsLineEnd(*sz)) {
                    ASSIMP_LOG_INFO(sz);
                }
            }
        }
    }

    // copy all arrays into one large
    meshes.reserve (meshes.size()+meshesLocked.size()+meshesWithNormals.size()+meshesWithUVCoords.size());
    meshes.insert  (meshes.end(),meshesLocked.begin(),meshesLocked.end());
    meshes.insert  (meshes.end(),meshesWithNormals.begin(),meshesWithNormals.end());
    meshes.insert  (meshes.end(),meshesWithUVCoords.begin(),meshesWithUVCoords.end());

    // now generate output meshes. first find out how many meshes we'll need
    std::vector<MeshInfo>::const_iterator it = meshes.begin(), end = meshes.end();
    for (;it != end;++it)
    {
        if (!(*it).faces.empty())
        {
            ++pScene->mNumMeshes;
            if ((*it).name[0])++numNamed;
        }
    }

    // generate a dummy root node - assign all unnamed elements such
    // as polygons and polygon patches to the root node and generate
    // sub nodes for named objects such as spheres and cones.
    aiNode* const root = new aiNode();
    root->mName.Set("<NFF_Root>");
    root->mNumChildren = numNamed + (hasCam ? 1 : 0) + (unsigned int) lights.size();
    root->mNumMeshes = pScene->mNumMeshes-numNamed;

    aiNode** ppcChildren = NULL;
    unsigned int* pMeshes = NULL;
    if (root->mNumMeshes)
        pMeshes = root->mMeshes = new unsigned int[root->mNumMeshes];
    if (root->mNumChildren)
        ppcChildren = root->mChildren = new aiNode*[root->mNumChildren];

    // generate the camera
    if (hasCam)
    {
        ai_assert(ppcChildren);
        aiNode* nd = new aiNode();
        *ppcChildren = nd;
        nd->mName.Set("<NFF_Camera>");
        nd->mParent = root;

        // allocate the camera in the scene
        pScene->mNumCameras = 1;
        pScene->mCameras = new aiCamera*[1];
        aiCamera* c = pScene->mCameras[0] = new aiCamera;

        c->mName = nd->mName; // make sure the names are identical
        c->mHorizontalFOV = AI_DEG_TO_RAD( angle );
        c->mLookAt      = camLookAt - camPos;
        c->mPosition    = camPos;
        c->mUp          = camUp;

        // If the resolution is not specified in the file, we
        // need to set 1.0 as aspect.
        c->mAspect      = (!resolution.y ? 0.f : resolution.x / resolution.y);
        ++ppcChildren;
    }

    // generate light sources
    if (!lights.empty())
    {
        ai_assert(ppcChildren);
        pScene->mNumLights = (unsigned int)lights.size();
        pScene->mLights = new aiLight*[pScene->mNumLights];
        for (unsigned int i = 0; i < pScene->mNumLights;++i,++ppcChildren)
        {
            const Light& l = lights[i];

            aiNode* nd = new aiNode();
            *ppcChildren = nd;
            nd->mParent = root;

            nd->mName.length = ::ai_snprintf(nd->mName.data,1024,"<NFF_Light%u>",i);

            // allocate the light in the scene data structure
            aiLight* out = pScene->mLights[i] = new aiLight();
            out->mName = nd->mName; // make sure the names are identical
            out->mType = aiLightSource_POINT;
            out->mColorDiffuse = out->mColorSpecular = l.color * l.intensity;
            out->mPosition = l.position;
        }
    }

    if (!pScene->mNumMeshes)throw DeadlyImportError("NFF: No meshes loaded");
    pScene->mMeshes = new aiMesh*[pScene->mNumMeshes];
    pScene->mMaterials = new aiMaterial*[pScene->mNumMaterials = pScene->mNumMeshes];
    unsigned int m = 0;
    for (it = meshes.begin(); it != end;++it)
    {
        if ((*it).faces.empty())continue;

        const MeshInfo& src = *it;
        aiMesh* const mesh = pScene->mMeshes[m] = new aiMesh();
        mesh->mNumVertices = (unsigned int)src.vertices.size();
        mesh->mNumFaces = (unsigned int)src.faces.size();

        // Generate sub nodes for named meshes
        if ( src.name[ 0 ] && NULL != ppcChildren  ) {
            aiNode* const node = *ppcChildren = new aiNode();
            node->mParent = root;
            node->mNumMeshes = 1;
            node->mMeshes = new unsigned int[1];
            node->mMeshes[0] = m;
            node->mName.Set(src.name);

            // setup the transformation matrix of the node
            aiMatrix4x4::FromToMatrix(aiVector3D(0.f,1.f,0.f),
                src.dir,node->mTransformation);

            aiMatrix4x4& mat = node->mTransformation;
            mat.a1 *= src.radius.x; mat.b1 *= src.radius.x; mat.c1 *= src.radius.x;
            mat.a2 *= src.radius.y; mat.b2 *= src.radius.y; mat.c2 *= src.radius.y;
            mat.a3 *= src.radius.z; mat.b3 *= src.radius.z; mat.c3 *= src.radius.z;
            mat.a4 = src.center.x;
            mat.b4 = src.center.y;
            mat.c4 = src.center.z;

            ++ppcChildren;
        } else {
            *pMeshes++ = m;
        }

        // copy vertex positions
        mesh->mVertices = new aiVector3D[mesh->mNumVertices];
        ::memcpy(mesh->mVertices,&src.vertices[0],
            sizeof(aiVector3D)*mesh->mNumVertices);

        // NFF2: there could be vertex colors
        if (!src.colors.empty())
        {
            ai_assert(src.colors.size() == src.vertices.size());

            // copy vertex colors
            mesh->mColors[0] = new aiColor4D[mesh->mNumVertices];
            ::memcpy(mesh->mColors[0],&src.colors[0],
                sizeof(aiColor4D)*mesh->mNumVertices);
        }

        if (!src.normals.empty())
        {
            ai_assert(src.normals.size() == src.vertices.size());

            // copy normal vectors
            mesh->mNormals = new aiVector3D[mesh->mNumVertices];
            ::memcpy(mesh->mNormals,&src.normals[0],
                sizeof(aiVector3D)*mesh->mNumVertices);
        }

        if (!src.uvs.empty())
        {
            ai_assert(src.uvs.size() == src.vertices.size());

            // copy texture coordinates
            mesh->mTextureCoords[0] = new aiVector3D[mesh->mNumVertices];
            ::memcpy(mesh->mTextureCoords[0],&src.uvs[0],
                sizeof(aiVector3D)*mesh->mNumVertices);
        }

        // generate faces
        unsigned int p = 0;
        aiFace* pFace = mesh->mFaces = new aiFace[mesh->mNumFaces];
        for (std::vector<unsigned int>::const_iterator it2 = src.faces.begin(),
            end2 = src.faces.end();
            it2 != end2;++it2,++pFace)
        {
            pFace->mIndices = new unsigned int [ pFace->mNumIndices = *it2 ];
            for (unsigned int o = 0; o < pFace->mNumIndices;++o)
                pFace->mIndices[o] = p++;
        }

        // generate a material for the mesh
        aiMaterial* pcMat = (aiMaterial*)(pScene->mMaterials[m] = new aiMaterial());

        mesh->mMaterialIndex = m++;

        aiString s;
        s.Set(AI_DEFAULT_MATERIAL_NAME);
        pcMat->AddProperty(&s, AI_MATKEY_NAME);

        // FIX: Ignore diffuse == 0
        aiColor3D c = src.shader.color * (src.shader.diffuse.r ?  src.shader.diffuse : aiColor3D(1.f,1.f,1.f));
        pcMat->AddProperty(&c,1,AI_MATKEY_COLOR_DIFFUSE);
        c = src.shader.color * src.shader.specular;
        pcMat->AddProperty(&c,1,AI_MATKEY_COLOR_SPECULAR);

        // NFF2 - default values for NFF
        pcMat->AddProperty(&src.shader.ambient, 1,AI_MATKEY_COLOR_AMBIENT);
        pcMat->AddProperty(&src.shader.emissive,1,AI_MATKEY_COLOR_EMISSIVE);
        pcMat->AddProperty(&src.shader.opacity, 1,AI_MATKEY_OPACITY);

        // setup the first texture layer, if existing
        if (src.shader.texFile.length())
        {
            s.Set(src.shader.texFile);
            pcMat->AddProperty(&s,AI_MATKEY_TEXTURE_DIFFUSE(0));

            if (aiTextureMapping_UV != src.shader.mapping) {

                aiVector3D v(0.f,-1.f,0.f);
                pcMat->AddProperty(&v, 1,AI_MATKEY_TEXMAP_AXIS_DIFFUSE(0));
                pcMat->AddProperty((int*)&src.shader.mapping, 1,AI_MATKEY_MAPPING_DIFFUSE(0));
            }
        }

        // setup the name of the material
        if (src.shader.name.length())
        {
            s.Set(src.shader.texFile);
            pcMat->AddProperty(&s,AI_MATKEY_NAME);
        }

        // setup some more material properties that are specific to NFF2
        int i;
        if (src.shader.twoSided)
        {
            i = 1;
            pcMat->AddProperty(&i,1,AI_MATKEY_TWOSIDED);
        }
        i = (src.shader.shaded ? aiShadingMode_Gouraud : aiShadingMode_NoShading);
        if (src.shader.shininess)
        {
            i = aiShadingMode_Phong;
            pcMat->AddProperty(&src.shader.shininess,1,AI_MATKEY_SHININESS);
        }
        pcMat->AddProperty(&i,1,AI_MATKEY_SHADING_MODEL);
    }
    pScene->mRootNode = root;
}

#endif // !! ASSIMP_BUILD_NO_NFF_IMPORTER