assimp.assimp/code/AssetLib/Obj/ObjFileMtlImporter.cpp

/*
---------------------------------------------------------------------------
Open Asset Import Library (assimp)
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All rights reserved.

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  following disclaimer.

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OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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*/

#ifndef ASSIMP_BUILD_NO_OBJ_IMPORTER

#include "ObjFileMtlImporter.h"
#include "ObjFileData.h"
#include "ObjTools.h"
#include <assimp/DefaultIOSystem.h>
#include <assimp/ParsingUtils.h>
#include <assimp/fast_atof.h>
#include <assimp/material.h>
#include <stdlib.h>
#include <assimp/DefaultLogger.hpp>

namespace Assimp {

// Material specific token (case insensitive compare)
static constexpr char DiffuseTexture[] = "map_Kd";
static constexpr char AmbientTexture[] = "map_Ka";
static constexpr char SpecularTexture[] = "map_Ks";
static constexpr char OpacityTexture[] = "map_d";
static constexpr char EmissiveTexture1[] = "map_emissive";
static constexpr char EmissiveTexture2[] = "map_Ke";
static constexpr char BumpTexture1[] = "map_bump";
static constexpr char BumpTexture2[] = "bump";
static constexpr char NormalTextureV1[] = "map_Kn";
static constexpr char NormalTextureV2[] = "norm";
static constexpr char ReflectionTexture[] = "refl";
static constexpr char DisplacementTexture1[] = "map_disp";
static constexpr char DisplacementTexture2[] = "disp";
static constexpr char SpecularityTexture[] = "map_ns";
static constexpr char RoughnessTexture[] = "map_Pr";
static constexpr char MetallicTexture[] = "map_Pm";
static constexpr char SheenTexture[] = "map_Ps";
static constexpr char RMATexture[] = "map_Ps";

// texture option specific token
static constexpr char BlendUOption[] = "-blendu";
static constexpr char BlendVOption[] = "-blendv";
static constexpr char BoostOption[] = "-boost";
static constexpr char ModifyMapOption[] = "-mm";
static constexpr char OffsetOption[] = "-o";
static constexpr char ScaleOption[] = "-s";
static constexpr char TurbulenceOption[] = "-t";
static constexpr char ResolutionOption[] = "-texres";
static constexpr char ClampOption[] = "-clamp";
static constexpr char BumpOption[] = "-bm";
static constexpr char ChannelOption[] = "-imfchan";
static constexpr char TypeOption[] = "-type";

// -------------------------------------------------------------------
//  Constructor
ObjFileMtlImporter::ObjFileMtlImporter(std::vector<char> &buffer,
        const std::string &strAbsPath,
        ObjFile::Model *pModel) :
        m_strAbsPath(strAbsPath),
        m_DataIt(buffer.begin()),
        m_DataItEnd(buffer.end()),
        m_pModel(pModel),
        m_uiLine(0),
        m_buffer() {
    ai_assert(nullptr != m_pModel);
    m_buffer.resize(BUFFERSIZE);
    std::fill(m_buffer.begin(), m_buffer.end(), '\0');
    if (nullptr == m_pModel->mDefaultMaterial) {
        m_pModel->mDefaultMaterial = new ObjFile::Material;
        m_pModel->mDefaultMaterial->MaterialName.Set("default");
    }

    // Try with OS folder separator first
    char folderSeparator = DefaultIOSystem().getOsSeparator();
    std::size_t found = m_strAbsPath.find_last_of(folderSeparator);
    if (found == std::string::npos) {
        // Not found, try alternative folder separator
        folderSeparator = (folderSeparator == '/' ? '\\' : '/');
        found = m_strAbsPath.find_last_of(folderSeparator);
    }
    if (found != std::string::npos) {
        m_strAbsPath = m_strAbsPath.substr(0, found + 1);
    } else {
        m_strAbsPath = "";
    }
    load();
}

// -------------------------------------------------------------------
//  Loads the material description
void ObjFileMtlImporter::load() {
    if (m_DataIt == m_DataItEnd)
        return;

    while (m_DataIt != m_DataItEnd) {
        switch (*m_DataIt) {
            case 'k':
            case 'K': {
                ++m_DataIt;
                if (*m_DataIt == 'a') // Ambient color
                {
                    ++m_DataIt;
                    if (m_pModel->mCurrentMaterial != nullptr)
                        getColorRGBA(&m_pModel->mCurrentMaterial->ambient);
                } else if (*m_DataIt == 'd') {
                    // Diffuse color
                    ++m_DataIt;
                    if (m_pModel->mCurrentMaterial != nullptr)
                        getColorRGBA(&m_pModel->mCurrentMaterial->diffuse);
                } else if (*m_DataIt == 's') {
                    ++m_DataIt;
                    if (m_pModel->mCurrentMaterial != nullptr)
                        getColorRGBA(&m_pModel->mCurrentMaterial->specular);
                } else if (*m_DataIt == 'e') {
                    ++m_DataIt;
                    if (m_pModel->mCurrentMaterial != nullptr)
                        getColorRGBA(&m_pModel->mCurrentMaterial->emissive);
                }
                m_DataIt = skipLine<DataArrayIt>(m_DataIt, m_DataItEnd, m_uiLine);
            } break;
            case 'T': {
                ++m_DataIt;
                // Material transmission color
                if (*m_DataIt == 'f')  {
                    ++m_DataIt;
                    if (m_pModel->mCurrentMaterial != nullptr)
                        getColorRGBA(&m_pModel->mCurrentMaterial->transparent);
                } else if (*m_DataIt == 'r')  {
                    // Material transmission alpha value
                    ++m_DataIt;
                    ai_real d;
                    getFloatValue(d);
                    if (m_pModel->mCurrentMaterial != nullptr)
                        m_pModel->mCurrentMaterial->alpha = static_cast<ai_real>(1.0) - d;
                }
                m_DataIt = skipLine<DataArrayIt>(m_DataIt, m_DataItEnd, m_uiLine);
            } break;
            case 'd': {
                if (*(m_DataIt + 1) == 'i' && *(m_DataIt + 2) == 's' && *(m_DataIt + 3) == 'p') {
                    // A displacement map
                    getTexture();
                } else {
                    // Alpha value
                    ++m_DataIt;
                    if (m_pModel->mCurrentMaterial != nullptr)
                        getFloatValue(m_pModel->mCurrentMaterial->alpha);
                    m_DataIt = skipLine<DataArrayIt>(m_DataIt, m_DataItEnd, m_uiLine);
                }
            } break;

            case 'N':
            case 'n': {
                ++m_DataIt;
                switch (*m_DataIt) {
                    case 's': // Specular exponent
                        ++m_DataIt;
                        if (m_pModel->mCurrentMaterial != nullptr)
                            getFloatValue(m_pModel->mCurrentMaterial->shineness);
                        break;
                    case 'i': // Index Of refraction
                        ++m_DataIt;
                        if (m_pModel->mCurrentMaterial != nullptr)
                            getFloatValue(m_pModel->mCurrentMaterial->ior);
                        break;
                    case 'e': // New material
                        createMaterial();
                        break;
                    case 'o': // Norm texture
                        --m_DataIt;
                        getTexture();
                        break;
                }
                m_DataIt = skipLine<DataArrayIt>(m_DataIt, m_DataItEnd, m_uiLine);
            } break;

            case 'P':
                {
                    ++m_DataIt;
                    switch(*m_DataIt)
                    {
                    case 'r':
                        ++m_DataIt;
                        if (m_pModel->mCurrentMaterial != nullptr)
                            getFloatValue(m_pModel->mCurrentMaterial->roughness);
                        break;
                    case 'm':
                        ++m_DataIt;
                        if (m_pModel->mCurrentMaterial != nullptr)
                            getFloatValue(m_pModel->mCurrentMaterial->metallic);
                        break;
                    case 's':
                        ++m_DataIt;
                        if (m_pModel->mCurrentMaterial != nullptr)
                            getColorRGBA(m_pModel->mCurrentMaterial->sheen);
                        break;
                    case 'c':
                        ++m_DataIt;
                        if (*m_DataIt == 'r') {
                            ++m_DataIt;
                            if (m_pModel->mCurrentMaterial != nullptr)
                                getFloatValue(m_pModel->mCurrentMaterial->clearcoat_roughness);
                        } else if (*m_DataIt == 't') {
                            ++m_DataIt;
                            if (m_pModel->mCurrentMaterial != nullptr)
                                getFloatValue(m_pModel->mCurrentMaterial->clearcoat_thickness);
                        } else {
                            if (m_pModel->mCurrentMaterial != nullptr)
                                getFloatValue(m_pModel->mCurrentMaterial->clearcoat);
                        }
                        break;
                    }
                    m_DataIt = skipLine<DataArrayIt>(m_DataIt, m_DataItEnd, m_uiLine);
                }
                break;
            
            case 'm': // Texture or metallic
            {
                // Save start of token (after 'm')
                auto tokenStart = m_DataIt;  // points to 'm'
                auto tokenEnd = getNextToken(m_DataIt, m_DataItEnd); // move iterator to end of token

                std::string keyword(tokenStart, tokenEnd);
                m_DataIt = tokenEnd; // advance iterator

                if (keyword.compare(0, 3, "map") == 0) {
                    // starts with "map", treat as texture map
                    m_DataIt = tokenStart;
                    getTexture();
                } else if (keyword == "metallic" || keyword == "metal" || keyword == "metalness") {
                    // parse metallic float value instead of texture
                    getFloatIfMaterialValid(&ObjFile::Material::metallic);
                }

                m_DataIt = skipLine<DataArrayIt>(m_DataIt, m_DataItEnd, m_uiLine);
            } break;

            case 'b': // quick'n'dirty - for 'bump' sections
            {
                getTexture();
                m_DataIt = skipLine<DataArrayIt>(m_DataIt, m_DataItEnd, m_uiLine);
            } break;

            case 'r': // refl (map) or roughness (float)
            {
                auto tokenStart = m_DataIt;  // points to 'r'
                auto tokenEnd = getNextToken(m_DataIt, m_DataItEnd);
                std::string keyword(tokenStart, tokenEnd);
                m_DataIt = tokenEnd;

                if (keyword == "roughness" || keyword == "rough") {
                    getFloatIfMaterialValid(&ObjFile::Material::roughness);
                } else if (keyword == "refl" || keyword == "reflection") {
                    m_DataIt = tokenStart;
                    getTexture();
                }

                m_DataIt = skipLine<DataArrayIt>(m_DataIt, m_DataItEnd, m_uiLine);
            } break;

            case 'i': // Illumination model
            {
                m_DataIt = getNextToken<DataArrayIt>(m_DataIt, m_DataItEnd);
                if (m_pModel->mCurrentMaterial != nullptr)
                    getIlluminationModel(m_pModel->mCurrentMaterial->illumination_model);
                m_DataIt = skipLine<DataArrayIt>(m_DataIt, m_DataItEnd, m_uiLine);
            } break;

            case 'a': {
                auto tokenStart = m_DataIt;
                auto tokenEnd = getNextToken(m_DataIt, m_DataItEnd);
                std::string keyword(tokenStart, tokenEnd);
                m_DataIt = tokenEnd;

                if (keyword == "aniso" || keyword == "anisotropy") {
                    getFloatIfMaterialValid(&ObjFile::Material::anisotropy);
                } else if (keyword == "ao") {
                    getFloatIfMaterialValid(&ObjFile::Material::ambient_occlusion);
                } else if (keyword == "anisor" || ai_stdStrToLower(keyword) == "anisotropicrotation") {
                    getFloatIfMaterialValid(&ObjFile::Material::anisotropy_rotation);
                } else {
                    ASSIMP_LOG_WARN("Unhandled keyword: ", keyword );
                }

                m_DataIt = skipLine<DataArrayIt>(m_DataIt, m_DataItEnd, m_uiLine);
            } break;

            case 's': {
                auto tokenStart = m_DataIt;
                auto tokenEnd = getNextToken(m_DataIt, m_DataItEnd);
                std::string keyword(tokenStart, tokenEnd);
                m_DataIt = tokenEnd;

                if (keyword == "subsurface" || keyword == "scattering") {
                    getFloatIfMaterialValid(&ObjFile::Material::subsurface_scattering);
                } else if (ai_stdStrToLower(keyword) == "speculartint") {
                    getFloatIfMaterialValid(&ObjFile::Material::specular_tint);
                } else if (keyword == "sheen") {
                    getFloatIfMaterialValid(&ObjFile::Material::sheen_grazing);
                } else if (ai_stdStrToLower(keyword) == "sheentint") {
                    getFloatIfMaterialValid(&ObjFile::Material::sheen_tint);
                } else {
                    ASSIMP_LOG_WARN("Unhandled keyword: ", keyword );
                }

                m_DataIt = skipLine<DataArrayIt>(m_DataIt, m_DataItEnd, m_uiLine);
            } break;

            case 'c': {
                auto tokenStart = m_DataIt;
                auto tokenEnd = getNextToken(m_DataIt, m_DataItEnd);
                std::string keyword(tokenStart, tokenEnd);
                m_DataIt = tokenEnd;

                if (ai_stdStrToLower(keyword) == "clearcoat") {
                    getFloatIfMaterialValid(&ObjFile::Material::clearcoat);
                } else if (ai_stdStrToLower(keyword) == "clearcoatgloss") {
                    getFloatIfMaterialValid(&ObjFile::Material::clearcoat_gloss);
                } else {
                    ASSIMP_LOG_WARN("Unhandled keyword: ", keyword );
                }

                m_DataIt = skipLine<DataArrayIt>(m_DataIt, m_DataItEnd, m_uiLine);
            } break;

            default: {
                m_DataIt = skipLine<DataArrayIt>(m_DataIt, m_DataItEnd, m_uiLine);
            } break;
        }
    }
}

// -------------------------------------------------------------------
//  Loads a color definition
void ObjFileMtlImporter::getColorRGBA(aiColor3D *pColor) {
    ai_assert(nullptr != pColor);

    ai_real r(0.0), g(0.0), b(0.0);
    m_DataIt = getFloat<DataArrayIt>(m_DataIt, m_DataItEnd, r);
    pColor->r = r;

    // we have to check if color is default 0 with only one token
    if (!IsLineEnd(*m_DataIt)) {
        m_DataIt = getFloat<DataArrayIt>(m_DataIt, m_DataItEnd, g);
        m_DataIt = getFloat<DataArrayIt>(m_DataIt, m_DataItEnd, b);
    }
    pColor->g = g;
    pColor->b = b;
}

// -------------------------------------------------------------------
void ObjFileMtlImporter::getColorRGBA(Maybe<aiColor3D> &value) {
    aiColor3D v;
    getColorRGBA(&v);
    value = Maybe<aiColor3D>(v);
}

// -------------------------------------------------------------------
//  Loads the kind of illumination model.
void ObjFileMtlImporter::getIlluminationModel(int &illum_model) {
    m_DataIt = CopyNextWord<DataArrayIt>(m_DataIt, m_DataItEnd, &m_buffer[0], BUFFERSIZE);
    illum_model = atoi(&m_buffer[0]);
}


// -------------------------------------------------------------------
//  Loads a single float value.
void ObjFileMtlImporter::getFloatValue(ai_real &value) {
    m_DataIt = CopyNextWord<DataArrayIt>(m_DataIt, m_DataItEnd, &m_buffer[0], BUFFERSIZE);
    size_t len = std::strlen(&m_buffer[0]);
    if (0 == len) {
        value = 0.0f;
        return;
    }

    value = (ai_real)fast_atof(&m_buffer[0]);
}

// -------------------------------------------------------------------
void ObjFileMtlImporter::getFloatValue(Maybe<ai_real> &value) {
    m_DataIt = CopyNextWord<DataArrayIt>(m_DataIt, m_DataItEnd, &m_buffer[0], BUFFERSIZE);
    size_t len = std::strlen(&m_buffer[0]);
    if (len)
        value = Maybe<ai_real>(fast_atof(&m_buffer[0]));
    else
        value = Maybe<ai_real>();
}

// -------------------------------------------------------------------
//  Writes a loaded single float value if material not null
void ObjFileMtlImporter::getFloatIfMaterialValid(ai_real ObjFile::Material::*member) {
    if (m_pModel != nullptr && m_pModel->mCurrentMaterial != nullptr) {
        // This will call getFloatValue(ai_real&)
        getFloatValue(m_pModel->mCurrentMaterial->*member);
    }
}

// -------------------------------------------------------------------
void ObjFileMtlImporter::getFloatIfMaterialValid(Maybe<ai_real> ObjFile::Material::*member) {
    // It can directly access `m_pModel` because it's part of the class
    if (m_pModel != nullptr && m_pModel->mCurrentMaterial != nullptr) {
        getFloatValue(m_pModel->mCurrentMaterial->*member);
    }
}

// -------------------------------------------------------------------
//  Creates a material from loaded data.
void ObjFileMtlImporter::createMaterial() {
    std::string line;
    while (!IsLineEnd(*m_DataIt)) {
        line += *m_DataIt;
        ++m_DataIt;
    }

    std::vector<std::string> token;
    const unsigned int numToken = tokenize<std::string>(line, token, " \t");
    std::string name;
    if (numToken == 1) {
        name = AI_DEFAULT_MATERIAL_NAME;
    } else {
        // skip newmtl and all following white spaces
        std::size_t first_ws_pos = line.find_first_of(" \t");
        std::size_t first_non_ws_pos = line.find_first_not_of(" \t", first_ws_pos);
        if (first_non_ws_pos != std::string::npos) {
            name = line.substr(first_non_ws_pos);
        }
    }

    name = ai_trim(name);

    std::map<std::string, ObjFile::Material *>::iterator it = m_pModel->mMaterialMap.find(name);
    if (m_pModel->mMaterialMap.end() == it) {
        // New Material created
        m_pModel->mCurrentMaterial = new ObjFile::Material();
        m_pModel->mCurrentMaterial->MaterialName.Set(name);
        m_pModel->mMaterialLib.push_back(name);
        m_pModel->mMaterialMap[name] = m_pModel->mCurrentMaterial;

        if (m_pModel->mCurrentMesh) {
            m_pModel->mCurrentMesh->m_uiMaterialIndex = static_cast<unsigned int>(m_pModel->mMaterialLib.size() - 1);
        }
    } else {
        // Use older material
        m_pModel->mCurrentMaterial = it->second;
    }
}

// -------------------------------------------------------------------
//  Gets a texture name from data.
void ObjFileMtlImporter::getTexture() {
    aiString *out = nullptr;
    int clampIndex = -1;

    if (m_pModel->mCurrentMaterial == nullptr) {
        m_pModel->mCurrentMaterial = new ObjFile::Material();
        m_pModel->mCurrentMaterial->MaterialName.Set("Empty_Material");
        m_pModel->mMaterialMap["Empty_Material"] = m_pModel->mCurrentMaterial;
    }

    const char *pPtr(&(*m_DataIt));
    if (!ASSIMP_strincmp(pPtr, DiffuseTexture, static_cast<unsigned int>(strlen(DiffuseTexture)))) {
        // Diffuse texture
        out = &m_pModel->mCurrentMaterial->texture;
        clampIndex = ObjFile::Material::TextureDiffuseType;
    } else if (!ASSIMP_strincmp(pPtr, AmbientTexture, static_cast<unsigned int>(strlen(AmbientTexture)))) {
        // Ambient texture
        out = &m_pModel->mCurrentMaterial->textureAmbient;
        clampIndex = ObjFile::Material::TextureAmbientType;
    } else if (!ASSIMP_strincmp(pPtr, SpecularTexture, static_cast<unsigned int>(strlen(SpecularTexture)))) {
        // Specular texture
        out = &m_pModel->mCurrentMaterial->textureSpecular;
        clampIndex = ObjFile::Material::TextureSpecularType;
    } else if (!ASSIMP_strincmp(pPtr, DisplacementTexture1, static_cast<unsigned int>(strlen(DisplacementTexture1))) ||
               !ASSIMP_strincmp(pPtr, DisplacementTexture2, static_cast<unsigned int>(strlen(DisplacementTexture2)))) {
        // Displacement texture
        out = &m_pModel->mCurrentMaterial->textureDisp;
        clampIndex = ObjFile::Material::TextureDispType;
    } else if (!ASSIMP_strincmp(pPtr, OpacityTexture, static_cast<unsigned int>(strlen(OpacityTexture)))) {
        // Opacity texture
        out = &m_pModel->mCurrentMaterial->textureOpacity;
        clampIndex = ObjFile::Material::TextureOpacityType;
    } else if (!ASSIMP_strincmp(pPtr, EmissiveTexture1, static_cast<unsigned int>(strlen(EmissiveTexture1))) ||
               !ASSIMP_strincmp(pPtr, EmissiveTexture2, static_cast<unsigned int>(strlen(EmissiveTexture2)))) {
        // Emissive texture
        out = &m_pModel->mCurrentMaterial->textureEmissive;
        clampIndex = ObjFile::Material::TextureEmissiveType;
    } else if (!ASSIMP_strincmp(pPtr, BumpTexture1, static_cast<unsigned int>(strlen(BumpTexture1))) ||
               !ASSIMP_strincmp(pPtr, BumpTexture2, static_cast<unsigned int>(strlen(BumpTexture2)))) {
        // Bump texture
        out = &m_pModel->mCurrentMaterial->textureBump;
        clampIndex = ObjFile::Material::TextureBumpType;
    } else if (!ASSIMP_strincmp(pPtr, NormalTextureV1, static_cast<unsigned int>(strlen(NormalTextureV1))) || !ASSIMP_strincmp(pPtr, NormalTextureV2, static_cast<unsigned int>(strlen(NormalTextureV2)))) {
        // Normal map
        out = &m_pModel->mCurrentMaterial->textureNormal;
        clampIndex = ObjFile::Material::TextureNormalType;
    } else if (!ASSIMP_strincmp(pPtr, ReflectionTexture, static_cast<unsigned int>(strlen(ReflectionTexture)))) {
        // Reflection texture(s)
        //Do nothing here
        return;
    } else if (!ASSIMP_strincmp(pPtr, SpecularityTexture, static_cast<unsigned int>(strlen(SpecularityTexture)))) {
        // Specularity scaling (glossiness)
        out = &m_pModel->mCurrentMaterial->textureSpecularity;
        clampIndex = ObjFile::Material::TextureSpecularityType;
    } else if ( !ASSIMP_strincmp( pPtr, RoughnessTexture, static_cast<unsigned int>(strlen(RoughnessTexture)))) {
        // PBR Roughness texture
        out = & m_pModel->mCurrentMaterial->textureRoughness;
        clampIndex = ObjFile::Material::TextureRoughnessType;
    } else if ( !ASSIMP_strincmp( pPtr, MetallicTexture, static_cast<unsigned int>(strlen(MetallicTexture)))) {
        // PBR Metallic texture
        out = & m_pModel->mCurrentMaterial->textureMetallic;
        clampIndex = ObjFile::Material::TextureMetallicType;
    } else if (!ASSIMP_strincmp( pPtr, SheenTexture, static_cast<unsigned int>(strlen(SheenTexture)))) {
        // PBR Sheen (reflectance) texture
        out = & m_pModel->mCurrentMaterial->textureSheen;
        clampIndex = ObjFile::Material::TextureSheenType;
    } else if (!ASSIMP_strincmp( pPtr, RMATexture, static_cast<unsigned int>(strlen(RMATexture)))) {
        // PBR Rough/Metal/AO texture
        out = & m_pModel->mCurrentMaterial->textureRMA;
        clampIndex = ObjFile::Material::TextureRMAType;
    } else {
        ASSIMP_LOG_ERROR("OBJ/MTL: Encountered unknown texture type");
        return;
    }

    bool clamp = false;
    getTextureOption(clamp, clampIndex, out);
    m_pModel->mCurrentMaterial->clamp[clampIndex] = clamp;

    std::string texture;
    m_DataIt = getName<DataArrayIt>(m_DataIt, m_DataItEnd, texture);
    if (nullptr != out) {
        out->Set(m_strAbsPath + texture);
    }
}

/* /////////////////////////////////////////////////////////////////////////////
 * Texture Option
 * /////////////////////////////////////////////////////////////////////////////
 * According to http://en.wikipedia.org/wiki/Wavefront_.obj_file#Texture_options
 * Texture map statement can contains various texture option, for example:
 *
 *  map_Ka -o 1 1 1 some.png
 *  map_Kd -clamp on some.png
 *
 * So we need to parse and skip these options, and leave the last part which is
 * the url of image, otherwise we will get a wrong url like "-clamp on some.png".
 *
 * Because aiMaterial supports clamp option, so we also want to return it
 * /////////////////////////////////////////////////////////////////////////////
 */
void ObjFileMtlImporter::getTextureOption(bool &clamp, int &clampIndex, aiString *&out) {
    m_DataIt = getNextToken<DataArrayIt>(m_DataIt, m_DataItEnd);

    // If there is any more texture option
    while (!isEndOfBuffer(m_DataIt, m_DataItEnd) && *m_DataIt == '-') {
        const char *pPtr(&(*m_DataIt));
        //skip option key and value
        int skipToken = 1;

        if (!ASSIMP_strincmp(pPtr, ClampOption, static_cast<unsigned int>(strlen(ClampOption)))) {
            DataArrayIt it = getNextToken<DataArrayIt>(m_DataIt, m_DataItEnd);
            char value[3];
            CopyNextWord(it, m_DataItEnd, value, sizeof(value) / sizeof(*value));
            if (!ASSIMP_strincmp(value, "on", 2)) {
                clamp = true;
            }

            skipToken = 2;
        } else if (!ASSIMP_strincmp(pPtr, TypeOption, static_cast<unsigned int>(strlen(TypeOption)))) {
            DataArrayIt it = getNextToken<DataArrayIt>(m_DataIt, m_DataItEnd);
            char value[12];
            CopyNextWord(it, m_DataItEnd, value, sizeof(value) / sizeof(*value));
            if (!ASSIMP_strincmp(value, "cube_top", 8)) {
                clampIndex = ObjFile::Material::TextureReflectionCubeTopType;
                out = &m_pModel->mCurrentMaterial->textureReflection[0];
            } else if (!ASSIMP_strincmp(value, "cube_bottom", 11)) {
                clampIndex = ObjFile::Material::TextureReflectionCubeBottomType;
                out = &m_pModel->mCurrentMaterial->textureReflection[1];
            } else if (!ASSIMP_strincmp(value, "cube_front", 10)) {
                clampIndex = ObjFile::Material::TextureReflectionCubeFrontType;
                out = &m_pModel->mCurrentMaterial->textureReflection[2];
            } else if (!ASSIMP_strincmp(value, "cube_back", 9)) {
                clampIndex = ObjFile::Material::TextureReflectionCubeBackType;
                out = &m_pModel->mCurrentMaterial->textureReflection[3];
            } else if (!ASSIMP_strincmp(value, "cube_left", 9)) {
                clampIndex = ObjFile::Material::TextureReflectionCubeLeftType;
                out = &m_pModel->mCurrentMaterial->textureReflection[4];
            } else if (!ASSIMP_strincmp(value, "cube_right", 10)) {
                clampIndex = ObjFile::Material::TextureReflectionCubeRightType;
                out = &m_pModel->mCurrentMaterial->textureReflection[5];
            } else if (!ASSIMP_strincmp(value, "sphere", 6)) {
                clampIndex = ObjFile::Material::TextureReflectionSphereType;
                out = &m_pModel->mCurrentMaterial->textureReflection[0];
            }

            skipToken = 2;
        } else if (!ASSIMP_strincmp(pPtr, BumpOption, static_cast<unsigned int>(strlen(BumpOption)))) {
            DataArrayIt it = getNextToken<DataArrayIt>(m_DataIt, m_DataItEnd);
            getFloat(it, m_DataItEnd, m_pModel->mCurrentMaterial->bump_multiplier);
            skipToken = 2;
        } else if (!ASSIMP_strincmp(pPtr, BlendUOption, static_cast<unsigned int>(strlen(BlendUOption))) ||
                !ASSIMP_strincmp(pPtr, BlendVOption, static_cast<unsigned int>(strlen(BlendVOption))) ||
                !ASSIMP_strincmp(pPtr, BoostOption, static_cast<unsigned int>(strlen(BoostOption))) ||
                !ASSIMP_strincmp(pPtr, ResolutionOption, static_cast<unsigned int>(strlen(ResolutionOption))) ||
                !ASSIMP_strincmp(pPtr, ChannelOption, static_cast<unsigned int>(strlen(ChannelOption)))) {
            skipToken = 2;
        } else if (!ASSIMP_strincmp(pPtr, ModifyMapOption, static_cast<unsigned int>(strlen(ModifyMapOption)))) {
            skipToken = 3;
        } else if (!ASSIMP_strincmp(pPtr, OffsetOption, static_cast<unsigned int>(strlen(OffsetOption))) ||
                !ASSIMP_strincmp(pPtr, ScaleOption, static_cast<unsigned int>(strlen(ScaleOption))) ||
                !ASSIMP_strincmp(pPtr, TurbulenceOption, static_cast<unsigned int>(strlen(TurbulenceOption)))) {
            skipToken = 4;
        }

        for (int i = 0; i < skipToken; ++i) {
            m_DataIt = getNextToken<DataArrayIt>(m_DataIt, m_DataItEnd);
        }
    }
}

// -------------------------------------------------------------------

} // Namespace Assimp

#endif // !! ASSIMP_BUILD_NO_OBJ_IMPORTER