Method LoadTimeline

Source/Engine/Content/Assets/Animation.cpp:80–227

#if USE_EDITOR

void Animation::LoadTimeline(BytesContainer& result) const
{
    result.Release();
    if (!IsLoaded())
        return;
    MemoryWriteStream stream(4096);

    // Version
    stream.WriteInt32(4);

    // Meta
    float fps = (float)Data.FramesPerSecond;
    const float fpsInv = 1.0f / fps;
    stream.Write(fps);
    stream.Write((int32)Data.Duration);
    int32 tracksCount = Data.Channels.Count() + NestedAnims.Count() + Events.Count();
    for (auto& channel : Data.Channels)
    {
        tracksCount +=
                (channel.Position.GetKeyframes().HasItems() ? 1 : 0) +
                (channel.Rotation.GetKeyframes().HasItems() ? 1 : 0) +
                (channel.Scale.GetKeyframes().HasItems() ? 1 : 0);
    }
    stream.Write(tracksCount);

    // Tracks
    int32 trackIndex = 0;
    for (int32 i = 0; i < Data.Channels.Count(); i++)
    {
        auto& channel = Data.Channels[i];
        const int32 childrenCount =
                (channel.Position.GetKeyframes().HasItems() ? 1 : 0) +
                (channel.Rotation.GetKeyframes().HasItems() ? 1 : 0) +
                (channel.Scale.GetKeyframes().HasItems() ? 1 : 0);

        // Animation Channel track
        stream.Write((byte)17); // Track Type
        stream.Write((byte)0); // Track Flags
        stream.Write(-1); // Parent Index
        stream.Write(childrenCount); // Children Count
        stream.Write(channel.NodeName, -13); // Name
        stream.Write(Color32::White); // Color
        const int32 parentIndex = trackIndex++;

        auto& position = channel.Position.GetKeyframes();
        if (position.HasItems())
        {
            // Animation Channel Data track (position)
            stream.Write((byte)18); // Track Type
            stream.Write((byte)0); // Track Flags
            stream.Write(parentIndex); // Parent Index
            stream.Write(0); // Children Count
            stream.Write(String::Format(TEXT("Track_{0}_Position"), i), -13); // Name
            stream.Write(Color32::White); // Color
            stream.Write((byte)0); // Type
            stream.Write(position.Count()); // Keyframes Count
            for (auto& k : position)
            {