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Update to 1.17
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Line 45:
private final int numSeedsToConvert;+ private final Item itemToCheck;+ private final Item itemReward;+ public WheatSeedsConverterModifier(ILootCondition[] conditionsIn, int numSeeds, Item itemCheck, Item reward) {+ super(conditionsIn);+ numSeedsToConvert = numSeeds;+ itemToCheck = itemCheck;+ itemReward = reward;+ }+ @Nonnull+ @Override+ public List<ItemStack> doApply(List<ItemStack> generatedLoot, LootContext context) {+ /*+ * Additional conditions can be checked, though as much as possible should be parameterized via JSON data.+ * It is better to write a new ILootCondition implementation than to do things here.+ */+ int numSeeds = 0;+ for(ItemStack stack : generatedLoot) {+ if(stack.getItem() == itemToCheck)+ numSeeds+=stack.getCount();+ }+ if(numSeeds >= numSeedsToConvert) {+ generatedLoot.removeIf(x -> x.getItem() == itemToCheck);+ generatedLoot.add(new ItemStack(itemReward, (numSeeds/numSeedsToConvert)));+ numSeeds = numSeeds%numSeedsToConvert;+ if(numSeeds > 0)+ generatedLoot.add(new ItemStack(itemToCheck, numSeeds));+ }+ return generatedLoot;+ }+ private static class Serializer extends GlobalLootModifierSerializer<WheatSeedsConverterModifier> {+ @Override+ public WheatSeedsConverterModifier read(ResourceLocation name, JsonObject object, ILootCondition[] conditionsIn) {+ int numSeeds = JSONUtils.getInt(object, "numSeeds");+ Item seed = ForgeRegistries.ITEMS.getValue(new ResourceLocation((JSONUtils.getString(object, "seedItem"))));+ Item wheat = ForgeRegistries.ITEMS.getValue(new ResourceLocation(JSONUtils.getString(object, "replacement")));+ return new WheatSeedsConverterModifier(conditionsIn, numSeeds, seed, wheat);+ }+ }+
+
},
},
{
{
− "condition": "block_state_property",
+ "condition": "minecraft:block_state_property",
− "block":"minecraft:wheat"
+ "block": "minecraft:wheat"
}
}
],
],
Line 70:
Line 70:
<syntaxhighlight lang="java">
<syntaxhighlight lang="java">
private static class WheatSeedsConverterModifier extends LootModifier {
private static class WheatSeedsConverterModifier extends LootModifier {
− private final int numSeedsToConvert;
− private final Item itemToCheck;
− private final Item itemReward;
− public WheatSeedsConverterModifier(LootItemCondition[] conditions, int numSeeds, Item itemCheck, Item reward) {
− super(conditions);
− numSeedsToConvert = numSeeds;
− itemToCheck = itemCheck;
− itemReward = reward;
− }
− @Nonnull
− @Override
− public List<ItemStack> doApply(List<ItemStack> generatedLoot, LootContext context) {
− /*
− * Additional conditions can be checked, though as much as possible should be parameterized via JSON data.
− * It is better to write a new LootItemCondition implementation than to do things here.
− */
− int numSeeds = 0;
− for(ItemStack stack : generatedLoot) {
− if(stack.getItem() == itemToCheck)
− numSeeds += stack.getCount();
− }
− if(numSeeds >= numSeedsToConvert) {
− generatedLoot.removeIf(x -> x.getItem() == itemToCheck);
− generatedLoot.add(new ItemStack(itemReward, (numSeeds/numSeedsToConvert)));
− numSeeds = numSeeds % numSeedsToConvert;
− if(numSeeds > 0)
− generatedLoot.add(new ItemStack(itemToCheck, numSeeds));
− }
− return generatedLoot;
− }
− private static class Serializer extends GlobalLootModifierSerializer<WheatSeedsConverterModifier> {
− @Override
− public WheatSeedsConverterModifier read(ResourceLocation name, JsonObject object, LootItemCondition[] conditions) {
− int numSeeds = GsonHelper.getAsInt(object, "numSeeds");
− Item seed = ForgeRegistries.ITEMS.getValue(new ResourceLocation((GsonHelper.getAsString(object, "seedItem"))));
− Item wheat = ForgeRegistries.ITEMS.getValue(new ResourceLocation(GsonHelper.getAsString(object, "replacement")));
− return new WheatSeedsConverterModifier(conditions, numSeeds, seed, wheat);
− }
− @Override
+ public JsonObject write(WheatSeedsConverterModifier instance) {
+ JsonObject json = makeConditions(instance.conditions);
+ json.addProperty("numSeeds", instance.numSeedsToConvert);
+ json.addProperty("seedItem", ForgeRegistries.ITEMS.getKey(instance.itemToCheck).toString());
+ json.addProperty("replacement", ForgeRegistries.ITEMS.getKey(instance.itemReward).toString());
+ return json;
+ }
+ }
}
}
</syntaxhighlight>
</syntaxhighlight>
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The critical portion is the <code>doApply</code> method.
The critical portion is the <code>doApply</code> method.
−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''.
−Also take note of the <code>read</code> method in the serializer. The conditions are already deserialized for you and if you have no other data, simply <code>return new MyModifier(conditionsIn)</code>. However, the full <code>JsonObject</code> is available if needed.
+Also take note of the <code>read</code> method in the serializer. The conditions are already deserialized for you and if you have no other data, simply <code>return new MyModifier(conditions)</code>. However, the full <code>JsonObject</code> is available if needed. The <code>write</code> method, on the other hand, is used for if you want to utilize <code>GlobalLootModifierProvider</code> for [[datageneration|data generation]].
−Additional [https://github.com/MinecraftForge/MinecraftForge/blob/1.15.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/1.17.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.