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Hot reloading with CMake

An example that demonstrates how to implement hot reloading for a game engine and integrate it with CMake.

The code example provided compiles and runs on both Linux and Windows.

hot_reloading_with_cmake.webm

The basic idea behind it:

The engine neeeds to be built as a dll.

• Copy the game engine's dll to a new file.
• Load the copied dll from the platform layer or a launcher at runtime.
• Every frame check if the original dll has been modified and if so unload the copied dll and repeat the process.
• In debug mode, ensure that the generated pdb files are named randomly to avoid locking.

Platforms:

• Linux.
• Windows.

Prerequisites:

Linux:

• sudo apt install -y cmake

Windows:

• Download and install CMake (version 3.20 atleast).

Building:

• Run one of the provided scripts, for example build_debug.sh or build_debug.bat.
• Output is in build/bin/${CONFIG}/ directory.