Game is created in version 4.10 of UE but c++ code works in 4.9 also. This repository contains a first person shooter game with multiple levels + the source code of the PAK downloader. Remember that this code is actually a prettified, and ripped-what-i-needed version of the “MapPakDownloader”. I simply got what I needed from this code, created a blueprintable class for the simple purpose of a working download-on-the-fly feature. Which does its job perfectly and is really easy to read and understand. If you check the engine source, you’ll find the responsible class is “ MapPakDownloader”. Also it would be possible to download them while the user was changing levels (by adding a between-levels map to make sure that everything gets downloaded, if not already). Only option was to keep the pak files (that were simply 20-100 mbs) and download them in background, mount them then use if loaded correctly.
Creating a single data file resolves in GB’s of file. As the current project required multiple huge levels with all different assets inside. Currently on-the-fly only downloads and mounts your first map from the game. If you have multiple levels, and want them to be downloaded by this feature, it will not work. If enabled, it keeps created pak files in a folder near your binaries and only packages the minimum necessities into your data file. Currently this feature is marked as experimental. So, I’ve been trying to understand how HTML packaging’s “Download maps on the fly” works underneath, and make sure that it works for me. If you are suffering with large files with lots of maps, this is a great way to solve that download problem. Currently the feature is experimental in Unreal Engine, but can be used extensively in your game.
I’ve written a simple c++ code for helping to understand and show how to use “download maps on the fly”.
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