auto val = boost::lexical_cast<double>(params.at(1));
int duration = params.size() > 2 ? boost::lexical_cast<int>(params.at(2)) : 0;
std::wstring tween = params.size() > 3 ? params.at(3) : L"linear";
auto val = boost::lexical_cast<double>(params.at(1));
int duration = params.size() > 2 ? boost::lexical_cast<int>(params.at(2)) : 0;
std::wstring tween = params.size() > 3 ? params.at(3) : L"linear";
- speed_ = speed_tweener(speed_.fetch(), val, duration, tween);
+ speed_ = speed_tweener(speed_.fetch(), -val, duration, tween);