Function ParseVectorDataArray

code/AssetLib/FBX/FBXParser.cpp:601–699

------------------------------------------------------------------------------------------------ read an array of float3 tuples

// ------------------------------------------------------------------------------------------------
// read an array of float3 tuples
void ParseVectorDataArray(std::vector<aiVector3D>& out, const Element& el)
{
    out.resize( 0 );

    const TokenList& tok = el.Tokens();
    if(tok.empty()) {
        ParseError("unexpected empty element",&el);
    }

    if(tok[0]->IsBinary()) {
        const char* data = tok[0]->begin(), *end = tok[0]->end();

        char type;
        uint32_t count;
        ReadBinaryDataArrayHead(data, end, type, count, el);

        if(count % 3 != 0) {
            ParseError("number of floats is not a multiple of three (3) (binary)",&el);
        }

        if(!count) {
            return;
        }

        if (type != 'd' && type != 'f') {
            ParseError("expected float or double array (binary)",&el);
        }

        std::vector<char> buff;
        ReadBinaryDataArray(type, count, data, end, buff, el);

        ai_assert(data == end);
        uint64_t dataToRead = static_cast<uint64_t>(count) * (type == 'd' ? 8 : 4);
        if (dataToRead != buff.size()) {
            ParseError("Invalid read size (binary)",&el);
        }

        const uint32_t count3 = count / 3;
        out.reserve(count3);

        if (type == 'd') {
            const double* d = reinterpret_cast<const double*>(&buff[0]);
            for (unsigned int i = 0; i < count3; ++i, d += 3) {
                BE_NCONST double val1 = d[0];
                BE_NCONST double val2 = d[1];
                BE_NCONST double val3 = d[2];
                AI_SWAP8(val1);
                AI_SWAP8(val2);
                AI_SWAP8(val3);
                out.emplace_back(static_cast<ai_real>(val1),
                    static_cast<ai_real>(val2),
                    static_cast<ai_real>(val3));
            }
            // for debugging
            /*for ( size_t i = 0; i < out.size(); i++ ) {
                aiVector3D vec3( out[ i ] );
                std::stringstream stream;
                stream << " vec3.x = " << vec3.x << " vec3.y = " << vec3.y << " vec3.z = " << vec3.z << std::endl;