Function LoadMtl

core/3d/ObjLoader.cpp:460–681

}

std::string LoadMtl(hlookup::string_map<int>& material_map,
                    std::vector<material_t>& materials,
                    std::istream& inStream)
{
    std::stringstream err;

    // Create a default material anyway.
    material_t material;
    InitMaterial(material);

    int maxchars = 8192;              // Alloc enough size.
    std::vector<char> buf(maxchars);  // Alloc enough size.
    while (inStream.peek() != -1)
    {
        inStream.getline(&buf[0], maxchars);

        std::string linebuf(&buf[0]);

        // Trim newline '\r\n' or '\n'
        if (!linebuf.empty())
        {
            if (linebuf[linebuf.size() - 1] == '\n')
                linebuf.erase(linebuf.size() - 1);
        }
        if (!linebuf.empty())
        {
            if (linebuf[linebuf.size() - 1] == '\r')
                linebuf.erase(linebuf.size() - 1);
        }

        // Skip if empty line.
        if (linebuf.empty())
        {
            continue;
        }

        // Skip leading space.
        const char* token = linebuf.c_str();
        token += strspn(token, " \t");

        assert(token);
        if (token[0] == '\0')
            continue;  // empty line

        if (token[0] == '#')
            continue;  // comment line

        // new mtl
        if ((0 == strncmp(token, "newmtl", 6)) && isSpace((token[6])))
        {
            // flush previous material.
            if (!material.name.empty())
            {
                material_map.emplace(material.name, static_cast<int>(materials.size()));
                materials.emplace_back(material);
            }

            // initial temporary material