TIL Unity Can Dual-Wield Input Systems

2021-01-22

I'm currently investigating Unity's (relatively) new Input System which intends to replace the Input Manager.

Of course, once you activate the new system, none of your old inputs will work in game. In fact, you'll get a bajillion errors in your console like this

InvalidOperationException: You are trying to read Input using the UnityEngine.Input class, but you have switched active Input handling to Input System package in Player Settings.

Well that sucks. It looks like it's one or the other. What if we needed to support a legacy implementation?

Yes it's possible to have both input methods running. An option needs to be enabled first however.

What's nice is you can now code using ENABLE_INPUT_SYSTEM and ENABLE_LEGACY_INPUT_MANAGER to ensure everyone plays nicely with each other!