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EffectLib

Makes creating new effects easier
by ympl
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111 downloads
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Updated Jul 6, 2026
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API and Library

EffectLib: Create Custom Mob Effects with Ease

EffectLib is a powerful library designed for mod developers who want to create and customize mob effects with ease. Using the MobEffectsUtil API, you can define custom effects, set unique behaviors, and integrate them seamlessly into your mod.

Features

  • Easy Initialization: Start using EffectLib with a simple initialization method.
  • Flexible Effect Creation: Define your custom effects with various categories and colors.
  • Custom Behaviors: Add behaviors to your effects such as onStart, onTick, and onEnd with lambda functions.
  • Tick Delay Customization: Control how often your onTick behavior is executed with adjustable tick delays.
  • Simple Registration: Register your effects easily to integrate them into your mod.

Getting Started

1. Initialize the Library

Initialize EffectLib with your mod’s unique ID:

MobEffectsUtil.initialize("your_mod_id");

2. Define Your Effect

Create a new effect with a name, category, and color:

ModMobEffectData data = new ModMobEffectData("my_effect", MobEffectCategory.NEUTRAL, 0);

3. Customize Effect Behaviors

Add optional behaviors for when the effect starts, ticks, or ends:

data.addOnStart((entity, amplifier) -> {
    // Code to run when effect starts
});

data.addOnTick((entity, amplifier) -> {
    // Code to run every tick
});

data.addOnEnd((entity, amplifier) -> {
    // Code to run when effect ends
});

data.setTickDelay(20); // Set delay between ticks

4. Create and Register the Effect

Finalize your effect creation and register it:

MobEffectsUtil.createEffect(data);
MobEffectsUtil.register(IEventBus bus);

Conclusion

EffectLib is designed to give mod developers an easy yet powerful way to create custom mob effects. With its flexible API and straightforward setup, you can create unique gameplay experiences in no time.

Links

effectlib-0.1.1-1.21.jar
MC 1.21, Client, Forge, Server
Beta 2024-09-01 Get

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