UE-HTML5

HTML5 platform support for Unreal Engine development tracker.

Check the UE-HTML5 Project for current development taskboard.

Branches to mention

• 4.24-html5 - UE 4.24.3 vanilla release with HTML5 platform updated to emscripten 3.1.2
• 4.24-html5_epic - deprecated branch based on original Epic's development
• 4.27-html5_dev - a DEV branch with experiments around UE 4.27

Dev platforms supported

• Windows
• Linux (Ubuntu 20.04 LTS tested; python3 is required)
• Mac (macOS Monterey tested, XCode 13; be sure to disable legacy build system usage warnings)

Core ideas

• No multithreading. It's basically dead idea for the modern web, so no support will be provided until its ressurection.
• Keep emscripten updated.
• Vanilla UE branches, all necessary engine code changes applied as runtime patch on setup stage.
• Two parallel dev directions:
  • Platform improvements: downloaded packages caching, multiple pak files, built-in DLC support, and other stuff to make it lightweight and rapidly launch.
  • Engine update: move to UE 4.27 first with WebGL2/OpenGLES3.0 support, then WebGPU research is planned.
• UE5 support is not considered for now as it has lack of 32-bit support, and emscripten hasn't 64-bit. Once UE5 will be released I'll check is it possible to create a some kind of frankenstein to mix them.

Also, I call this "tool" as a plugin. Basically it's not exactly a plugin, but it suits me.

How to use

Build requirements

This should be installed and available via PATH before running HTML5Setup.sh

• cmake
• Python 3.x

Step-by-step

1. Clone the desired branch (4.24-html5)
2. Run Setup.bat
3. Go to Engine/Platforms/HTML5 and launch HTML5Setup.sh with Git Bash
4. Run GenerateProjectFiles.bat
5. Build the engine and work as usual, but now with HTML5 platform enabled.