Page 1 of 1
LUA Function - Object does not match Target Type
Posted: Tue Apr 25, 2023 3:33 pm
by AvalonGames
Hey Tony,
I was trying to register my custom Methods and followed your tutorial : Connecting C# Methods to LUA.
So I wrote similar code as shown below
- LUA.png (88.61 KiB) Viewed 259 times
I registered 3 methods to test. The first two are calling LevelUp() and GainExp() from a Character ScriptableObject, and GainXp is calling a local method.
GainXp works without any issues.
When I try to call my two functions from my scriptable Object I run into Object does not match Target Type error. I have the methods registered to the LUA Function
- lua2.png (2.86 KiB) Viewed 259 times
- lua3.png (31.05 KiB) Viewed 259 times
I know there's another thread that was similar to my question, but I wasn't able to fully draw a solution to my issue.
Thanks again as always for helping me debug.
Cheers
Re: LUA Function - Object does not match Target Type
Posted: Tue Apr 25, 2023 3:55 pm
by Tony Li
Hi,
Try creating methods inside your PlayerController script:
Code: Select all
Lua.RegisterFunction("GainExp", this, SymbolExtensions.GetMethodInfo(() => PlayerGainExp((double)0)));
...
private void PlayerGainExp(double exp)
{
this.player.GainExp(exp);
}
Re: LUA Function - Object does not match Target Type
Posted: Tue Apr 25, 2023 4:18 pm
by AvalonGames
Hey Tony,
Thanks as always, this way works and fixes the issue I'm having, but I was wondering why calling the method directly from the Scriptable Object seems to cause an error?
Correct me if I'm wrong, but from my understanding with OOP if you need a behavior to change properties of an object you’d define it as a function in that class (In this case I have the functions in the SO class). So creating a local method to call player.GainExp() seems kind of redundant to me.
Thanks!
Re: LUA Function - Object does not match Target Type
Posted: Tue Apr 25, 2023 4:39 pm
by Tony Li
The issue is in the Lua registration. You're mapping the Lua function to an instance of your PlayerController script (this), but you're mapping a method that's in a different class and instance (this.player).
Technically you could do something like this, which will map the Lua function to the CharacterDataSO instance:
Code: Select all
Lua.RegisterFunction("GainExp", this.player, SymbolExtensions.GetMethodInfo(() => this.player.GainExp((double)0)));
However, I just think it's easier if you always map functions to methods in the same class.
Re: LUA Function - Object does not match Target Type
Posted: Tue Apr 25, 2023 5:00 pm
by AvalonGames
Ohh, I understanding what's happening now
Thanks for explaining.
Also I agree, I think it is easier to just do as you suggested!
Re: LUA Function - Object does not match Target Type
Posted: Tue Apr 25, 2023 6:07 pm
by Tony Li
Happy to help!