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Dynamic Loot Modification (view source)
Revision as of 18:30, 20 September 2022
, 18:30, 20 September 2022Fix the explanation
#* This will contain all of the data about your modification and allows data packs to tweak your effect.
#* This will contain all of the data about your modification and allows data packs to tweak your effect.
# A class that extends <code>LootModifier</code>
# A class that extends <code>LootModifier</code>
#* The operational code that makes your modifier work and associated serializer.
#* The operational code that makes your modifier work and associated codec.
Finally, the serializer for your operational class is [[Registration|registered]] as any other registry object.
Finally, the codec for your operational class is [[Registration|registered]] as any other registry object.
==The global_loot_modifiers.json==
==The global_loot_modifiers.json==
== The LootModifier Subclass ==
== The LootModifier Subclass ==
You will also need a static child class that extends <code>GlobalLootModifierSerializer<T></code> where <code>T</code> is your LootModifier subclass in order to deserialize your json data file into operational code.
You will also need a <code>Codec<T></code> where <code>T</code> is your LootModifier subclass in order to deserialize your json data file into operational code. The codec must be [[Registration|registered]].
<syntaxhighlight lang="java">
<syntaxhighlight lang="java">
*
*
*/
*/
// Assume there exists a <code>IForgeRegistry<Codec<T extends LootModifier>></code> LOOT_MODIFIER_REGISTRAR added by a mod
private static class WheatSeedsConverterModifier extends LootModifier
private static class WheatSeedsConverterModifier extends LootModifier
{
{
public static final Supplier<Codec<WheatSeedsConverterModifier>> CODEC = Suppliers.memoize(() ->
public static final RegistryObject<Codec<WheatSeedsConverterModifier>> CODEC = LOOT_MODIFIER_REGISTRAR.register("wheat_seeds_converter", () ->
RecordCodecBuilder.create(inst -> codecStart(inst).and(
RecordCodecBuilder.create(inst -> codecStart(inst).and(
inst.group(
inst.group(
This method is only called if the <code>conditions</code> specified return <code>true</code> and the modder is now able to make the modifications they desire. In this case we can see that the number of <code>itemToCheck</code> meets or exceeds the <code>numSeedsToConvert</code> before modifying the list by adding an <code>itemReward</code> and removing any excess <code>itemToCheck</code> stacks, matching the previously mentioned effects: ''When a wheat block is harvested with shears, if enough seeds are generated as loot, they are converted to additional wheat instead''.
This method is only called if the <code>conditions</code> specified return <code>true</code> and the modder is now able to make the modifications they desire. In this case we can see that the number of <code>itemToCheck</code> meets or exceeds the <code>numSeedsToConvert</code> before modifying the list by adding an <code>itemReward</code> and removing any excess <code>itemToCheck</code> stacks, matching the previously mentioned effects: ''When a wheat block is harvested with shears, if enough seeds are generated as loot, they are converted to additional wheat instead''.
The codec can also be used for [[datageneration|data generation]] with a <code>GlobalLootModifierProvider</code>.
Additional [https://github.com/MinecraftForge/MinecraftForge/blob/1.19.x/src/test/java/net/minecraftforge/debug/gameplay/loot/GlobalLootModifiersTest.java examples] can be found on the Forge Git repository, including silk touch and smelting effects.
Additional [https://github.com/MinecraftForge/MinecraftForge/blob/1.19.x/src/test/java/net/minecraftforge/debug/gameplay/loot/GlobalLootModifiersTest.java examples] can be found on the Forge Git repository, including silk touch and smelting effects.