Custom Recipe Modifiers / Data Logic

Adding a Modifier

Custom recipe modifiers in are done through a function. For this example, we will make multiblock that requires temperature for recipes, like the EBF does.

Warning

It is recommended that your custom recipe modifiers are implemented in Java.

JavaJavaScript

AddonRecipeModifiers.java

public static ModifierFunction customTemperatureModifier(MetaMachine machine, GTRecipe recipe) {
    if (!(machine instanceof CoilWorkableElectricMultiblockMachine coilWorkable)) {
        return RecipeModifier.nullWrongType(CoilWorkableElectricMultiblockMachine.class, machine);
    }
    int temp = coilWorkable.getCoilType().getCoilTemperature();

    int recipeTemp = recipe.data.getInt("RequiredTemp");
    if (recipeTemp > temp) {
        return ModifierFunction.NULL; // Cancels recipe
    }
    return ModifierFunction.IDENTITY; // Runs recipe
}

temperature_recipe_modifier.js

const $GTRecipe = Java.loadClass("com.gregtechceu.gtceu.api.recipe.GTRecipe");
const $MetaMachine = Java.loadClass("com.gregtechceu.gtceu.api.machine.MetaMachine");

function TemperatureModifier(machine, recipe) {
    if (!machine instanceof $CoilWorkableElectricMultiblockMachine) {
        return $RecipeModifier.nullWrongType($CoilWorkableElectricMultiblockMachine, machine);
    } else {

        let temp = machine.getCoilType().getCoilTemperature() // (1)

        let recipeTemp = recipe.data.getInt("RequiredTemp") // (2)
        if (recipeTemp > temp) {
            return ModifierFunction.NULL // Cancels recipe
        }
        return ModifierFunction.IDENTITY // Runs recipe
    }
}

1. Getting the coil temperature, multiblock must contain .heatingCoils() in any of its keys.
2. Checking if coil temperature is high enough.

Using Modifier

example_temperature_multiblock.js

const $CoilWorkableElectricMultiblockMachine = Java.loadClass("com.gregtechceu.gtceu.api.machine.multiblock.CoilWorkableElectricMultiblockMachine");

GTCEuStartupEvents.registry('gtceu:recipe_type', event => {
    event.create('example_smelting')
        .category('multiblock')
        .setMaxIOSize(1, 1, 0, 0)
        .setProgressBar(GTGuiTextures.PROGRESS_FUSION)
        .addRecipeInfo(recipe => Text.literal(`Temperature: ${recipe.data.getInt("RequiredTemp")}K`)) // (3) (4)
        .setSound(GTSoundEntries.BATH);
});

GTCEuStartupEvents.registry('gtceu:machine', event => {

    event.create('example_smelter', 'multiblock')
        .rotationState(RotationState.NON_Y_AXIS)
        .machine((holder) => new $CoilWorkableElectricMultiblockMachine(holder)) // (1)
        .recipeType('alchemy')
        .recipeModifiers([(machine, recipe) => TemperatureModifier(machine, recipe)]) // (2)
        .appearanceBlock(() => Block.getBlock("gtceu:solid_machine_casing"))
        .pattern(definition => MultiblockPatternBuilder.start(RelativeDirection.FRONT, RelativeDirection.UP, RelativeDirection.LEFT)
            .slice("###","HHH","###")
            .slice("###","H H","###")
            .slice("#C#","HHH","###")
            .where('C', Predicates.controller(Predicates.blocks(definition.get())))
            .where('#', Predicates.blocks("gtceu:solid_machine_casing")
                .and(Predicates.abilities(PartAbility.IMPORT_ITEMS).setPreviewCount(1))
                .and(Predicates.abilities(PartAbility.EXPORT_ITEMS).setPreviewCount(1))
                .and(Predicates.abilities(PartAbility.INPUT_ENERGY).setMaxGlobalLimited(1).setPreviewCount(1)))
            .where('H', Predicates.heatingCoils())
            .where(' ', Predicates.any())
            .build())
        .workableCasingModel("gtceu:block/casings/solid/machine_casing_solid_steel", "gtceu:block/multiblock/blast_furnace")
})

1. Making multiblock coilMachine, without it our modifier won't work.
2. Using our modifier.
3. Display our data in EMI.
4. Getting RequiredTemp data from our recipe.

Using our Modifier in a Recipe

To use our modifier in recipe, you need to add data to it.

example_smelting.js

ServerEvents.recipes(event => {
    event.recipes.gtceu.example_smelting('example:diamondirt')
        .itemInputs('minecraft:dirt')
        .itemOutputs('gtceu:raw_diamond')
        .addData("RequiredTemp", 1000) // (1)
        .duration(320)
        .EUt(GTValues.VA[GTValues.LV]);
})

1. Adding data to our recipe, in this situation - Temperature