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Capability usage across mods


TheGreyGhost
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Howdy folks

I'm currently investigating Forge Capabilities and there's one aspect that I haven't figured out yet.

If I want to access a Capability introduced by another mod, how am I supposed to do that?

 

For inbuilt Capability (such as CapabilityItemHandler) it's no problem, but for anything defined by another mod I can't see an obvious way to access the Capability and its interface (unless of course I include the mod source as a library / dependency).

 

How is that intended to work?  

 

-TGG

 

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You use @CapabilityInject to inject the other mod's capability. You can put this annotation on a method too (see the javadocs) and that method will then only be called if the other mod is present.

In that method you can then enable your mod's compatibility features. If you put this method in a separate class that class will never load unless the other mod is present.

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1 hour ago, diesieben07 said:

You use @CapabilityInject to inject the other mod's capability. You can put this annotation on a method too (see the javadocs) and that method will then only be called if the other mod is present.

In that method you can then enable your mod's compatibility features. If you put this method in a separate class that class will never load unless the other mod is present.

OK.  So I still need to include that mod's source (or just the jar?) as a library, but if the other mod isn't present then my code will still run (even though the capability interface isn't present).

 

Could you point me in the direction of a working example?

 

TGG

 

 

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1 hour ago, TheGreyGhost said:

OK.  So I still need to include that mod's source (or just the jar?) as a library

Just at build time. You don't need to ship the other mod.

 

1 hour ago, TheGreyGhost said:

if the other mod isn't present then my code will still run (even though the capability interface isn't present).

You need to "shield" the part of your code that uses the code from the other mod. You cannot reference it from other parts of your code, only from that @CapabilityInject method.

 

1 hour ago, TheGreyGhost said:

Could you point me in the direction of a working example?

I don't have one, sorry.

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