OBSOLETE

tModLoader 0.11+ includes its own version of TerrariaHooks / MonoMod.

Please tell any mod developers which still use this old version to update their mods.

TerrariaHooks

License: MIT

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HookGen "recipe" for Terraria, resulting in a TML mod that other mods can depend on.

Built with MonoMod.

Features

For Players

This mod is a helper for other mods. Just install it if a mod needs it, it won't change Terraria on its own.

For Modders

• "Hook" any arbitrary method you want easily:

On.Terraria.Player.CheckMana += (orig, player, amount, pay, blockQuickMana) => {
	// We can either make this act as a method replacement
	// or just call our code around the original code.

	// Let's double the mana cost of everything.
	// We can pass on custom values.
	bool spendable = orig(player, amount * 2, pay, blockQuickMana);

	// ... but give back half of it if it was spent.
	if (spendable && pay) {
		player.statMana += amount / 2;
	}

	// We can return custom values.
	return spendable;
}

For an extended example, take a look at this gist.

• Use "hooks" to detect when a method runs, change how it runs or even replace it.
  "Hooks" are automatically undone whenever your mod unloads. This is handled by TerrariaHooks for you.

• Manipulate any method at runtime via IL... += (...) => {...} using Cecil and many helpers.
  Special thanks to Chicken-Bones for the great ideas and feedback along the way!

• Use RuntimeDetour to quickly port your existing "method swapping" code.
  Note that this requires you to undo your detours on unload.

If you need more info, read the MonoMod RuntimeDetour README.

Instructions

If you want to use TerrariaHooks in your mod:

• Download TerrariaHooks.dll from the latest release.
• Put it into your mod lib folder.
• Add it as a reference in Visual Studio.
• In your build.txt, add modReferences = TerrariaHooks
• Add your hooks in your mod Load method.
• TerrariaHooks will automatically undo your hook when your mod unloads.

Building TerrariaHooks yourself

• git clone --recursive https://github.com/0x0ade/TerrariaHookGen.git
  • Alternatively, pull in the MonoMod submodule manually
• Update the files in _input
  • The files redistributed in this repo are stripped.
  • The files in that directory will be stripped automatically on each run.
• Build the solution.
• Run ./TerrariaHookGen/bin/Debug/TerrariaHookGen.exe _input .
• In the Terraria directory, run ./tModLoaderServer.exe -build 'path/to/TerrariaHooks' -eac

This repository overcomplicates the entire procedure. It boils down to:

./MonoMod.RuntimeDetour.HookGen.exe --private Terraria.exe TerrariaHooksPre.dll
./ILRepack.exe /out:TerrariaHooks.dll TerrariaHooksPre.dll MonoMod.*.dll MonoMod.exe

When running the above two lines in the Terraria directory (with all dependencies present), it generates TerrariaHooks.dll for your Terraria.exe.

The sole purpose of this repository is to automate the process entirely, and to allow publishing TerrariaHooks.dll as a TML mod.