bool GLTFImport::RetargetAnimation(ozz::animation::offline::RawAnimation* anim, const std::vector<ozz::math::Transform>& sourceRestPose, const std::vector<ozz::math::Transform>& targetRestPose)
{
    if (sourceRestPose.size() != targetRestPose.size() || sourceRestPose.size() != anim->num_tracks())
        return false;

    using namespace ozz::math;
    std::vector<Transform> diffs;
    diffs.resize(anim->num_tracks());

    for (size_t i = 0; i < anim->num_tracks(); i++) {
        auto& diffT = diffs[i];
        auto& targetT = targetRestPose[i];
        auto& sourceT = sourceRestPose[i];
        diffT.rotation = targetT.rotation * Quaternion{ -sourceT.rotation.x, -sourceT.rotation.y, -sourceT.rotation.z, sourceT.rotation.w };
        diffT.translation = targetT.translation - sourceT.translation;
    }

    auto diffIter = diffs.begin();
    for (auto& track : anim->tracks) {
        for (auto& rot : track.rotations) {
            rot.value = diffIter->rotation * rot.value;
        }
        for (auto& trans : track.translations) {
            trans.value = diffIter->translation + trans.value;
        }
        diffIter++;
    }

    return true;
}