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Posted

Trying to create a capability for a Mana System i want to implement. However i keep ending up with my references in the Provider pointing to null and for the life of me can't figure out how to get this working. I could just be looking at it wrong, my java experience comes from coding database front ends. 

 

Any help would be appreciated. full project @ https://github.com/Maitredetoi/MagicMod/tree/master/src/main/java/com/systemsbysparky/magicmod/magic

@CapabilityInject(IMana.class)
private static final Capability<IMana> MANA_CAP = null;

public static class ManaProvider implements ICapabilityProvider {

    @Override
    public boolean hasCapability(@Nonnull Capability<?> capability, @Nullable EnumFacing facing) {
        return MANA_CAP != null && capability == MANA_CAP;

    }

    @Nullable
    @Override
    public <T> T getCapability(@Nonnull Capability<T> capability, @Nullable EnumFacing facing) {T
        if (MANA_CAP != null && capability == MANA_CAP) return Capability<T>;
        return null;
    }
}
Posted
8 minutes ago, maitre.de.toi said:

return Capability<T>;

This is nonsense. 

You need to return an instance of IMana

Apparently I'm a complete and utter jerk and come to this forum just like to make fun of people, be confrontational, and make your personal life miserable.  If you think this is the case, JUST REPORT ME.  Otherwise you're just going to get reported when you reply to my posts and point it out, because odds are, I was trying to be nice.

 

Exception: If you do not understand Java, I WILL NOT HELP YOU and your thread will get locked.

 

DO NOT PM ME WITH PROBLEMS. No help will be given.

Posted (edited)
6 hours ago, Daeruin said:

There is a tutorial that walks you through creating a mana system using capabilities: https://github.com/mchorse/capabilities/tree/master/src/main/java/mchorse/capabilities

That's not a tutorial. That's code which somebody can blindly copy & paste without learning. It doesn't even have comments to explain what's actually going on...

 

The official docs explans how to create a custom capability: http://mcforge.readthedocs.io/en/latest/datastorage/capabilities/

Edited by larsgerrits

Don't PM me with questions. They will be ignored! Make a thread on the appropriate board for support.

 

1.12 -> 1.13 primer by williewillus.

 

1.7.10 and older versions of Minecraft are no longer supported due to it's age! Update to the latest version for support.

 

http://www.howoldisminecraft1710.today/

Posted (edited)

Sorry, I linked to the wrong thing. That code goes with an actual tutorial here: https://www.planetminecraft.com/blog/forge-tutorial-capability-system/. Not the greatest, but it's something to help get started.

 

And no offense to whoever wrote Forge's official documentation for capabilities, but it's really difficult to understand for beginners.

Edited by Daeruin
Made my comment about the documentation less offensive
Posted (edited)

I've got some tutorial information as well as links to others here: http://jabelarminecraft.blogspot.com/p/minecraft-17x.html

 

Note that part of the confusion is that there are actually four fairly different situations related to capabilities: 

  1. Using existing capabilities (e.g. IItemHolder) in your custom classes
  2. Using custom capabilities in your custom classes
  3. Using existing capabilities on vanilla (or other mod's) classes
  4. Using custom capabilities on vanilla (or other mod's) classes

I think people get confused because often a tutorial will be covering a case different than yours and so if you apply it you'll either be missing something needed or will duplicate something unnecessary.

Edited by jabelar
  • Like 3

Check out my tutorials here: http://jabelarminecraft.blogspot.com/

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