Overview

The main feature of UnLuaNova is overriding 'BlueprintEvent', 'AnimNotify', 'RepNotify', 'InputEvent' without helper codes. This document will introduce the two methods to implement overriding.

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Thunk Function Replacement

Thunk function of UFunction

'Func' is the thunk function.

UFunction invoking

If replacing the engine's default thunk function with a customized thunk function that calling Lua function, we can override the UFunction.

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Opcode Injection

There is another path to call non-native UFunction:

Replacing thunk function is useless in this case, and we can inject special Opcodes to UFunction to implement overriding.

New opcode definition

New opcode registering

Injection

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Further reading

• Programming Guide — Overriding from the Lua side
• API Reference — API reference
• FAQ — Frequently asked questions