Function parseMtlColor

source/MRMesh/MRMeshLoadObj.cpp:348–382

}

Expected<void> parseMtlColor( const std::string_view& str, Vector3f& color )
{
    using namespace boost::spirit::x3;

    auto r = [&] ( auto& ctx )
    {
        color.x = _attr( ctx );
    };
    auto g = [&] ( auto& ctx )
    {
        color.y = _attr( ctx );
    };
    auto b = [&] ( auto& ctx )
    {
        color.z = _attr( ctx );
    };

    bool res = phrase_parse(
        str.begin(),
        str.end(),
        (
            char_( 'K' ) >> ( char_( 'a' ) | char_( 'd' ) | char_( 's' ) )
            >> (
                ( float_[r] >> float_[g] >> float_[b] ) |
                ( lit( "spectral" ) >> no_skip[+char_] ) |
                ( lit( "xyz" ) >> float_ >> float_ >> float_ )
                )
            ),
        space
    );
    if ( !res )
        return unexpected( "Failed to parse color in MTL-file" );

    return {};
}

Expected<void> parseMtlTexture( const std::string_view& str, std::string& textureFile )
{