diff --git a/fabric-item-api-v1/src/main/java/net/fabricmc/fabric/mixin/item/ArmorItemMixin.java b/fabric-item-api-v1/src/main/java/net/fabricmc/fabric/mixin/item/ArmorItemMixin.java
new file mode 100644
index 000000000..7e2ebe7b7
--- /dev/null
+++ b/fabric-item-api-v1/src/main/java/net/fabricmc/fabric/mixin/item/ArmorItemMixin.java
@@ -0,0 +1,55 @@
+/*
+ * Copyright (c) 2016, 2017, 2018, 2019 FabricMC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package net.fabricmc.fabric.mixin.item;
+
+import java.util.UUID;
+
+import com.google.common.collect.ImmutableMultimap;
+import org.spongepowered.asm.mixin.injection.At;
+import org.spongepowered.asm.mixin.injection.ModifyVariable;
+import org.spongepowered.asm.mixin.Final;
+import org.spongepowered.asm.mixin.Mixin;
+import org.spongepowered.asm.mixin.Shadow;
+
+import net.minecraft.entity.attribute.EntityAttributeModifier;
+import net.minecraft.entity.attribute.EntityAttributes;
+import net.minecraft.entity.attribute.EntityAttribute;
+import net.minecraft.entity.EquipmentSlot;
+import net.minecraft.item.ArmorItem;
+import net.minecraft.item.ArmorMaterial;
+import net.minecraft.item.ArmorMaterials;
+
+@Mixin(ArmorItem.class)
+public class ArmorItemMixin {
+ @Shadow private static @Final UUID[] MODIFIERS;
+ @Shadow protected @Final float knockbackResistance;
+
+ /* Vanilla only adds a knockback resistance modifier to ArmorItems made of ArmorMaterials.NETHERITE. This mixin
+ * adds a knockback resistance modifier to any ArmorItem if knockbackResistance is > 0.0F.
+ */
+ @ModifyVariable(method = "<init>", at = @At(value = "INVOKE", target = "Lcom/google/common/collect/ImmutableMultimap$Builder;build()Lcom/google/common/collect/ImmutableMultimap;"))
+ private ImmutableMultimap.Builder<EntityAttribute, EntityAttributeModifier> fabric_knockbackResistance(ImmutableMultimap.Builder<EntityAttribute, EntityAttributeModifier> builder, ArmorMaterial material, EquipmentSlot slot) {
+ // Vanilla handles netherite
+ if (material != ArmorMaterials.NETHERITE && knockbackResistance > 0.0F) {
+ builder.put(EntityAttributes.GENERIC_KNOCKBACK_RESISTANCE, new EntityAttributeModifier(
+ MODIFIERS[slot.getEntitySlotId()], "Armor knockback resistance",
+ knockbackResistance, EntityAttributeModifier.Operation.ADDITION));
+ }
+
+ return builder;
+ }
+}
diff --git a/fabric-item-api-v1/src/main/resources/fabric-item-api-v1.mixins.json b/fabric-item-api-v1/src/main/resources/fabric-item-api-v1.mixins.json
index 524c59b9a..69d431532 100644
--- a/fabric-item-api-v1/src/main/resources/fabric-item-api-v1.mixins.json
+++ b/fabric-item-api-v1/src/main/resources/fabric-item-api-v1.mixins.json
@@ -5,7 +5,8 @@
"mixins": [
"ItemStackMixin",
"ItemMixin",
- "LivingEntityMixin"
+ "LivingEntityMixin",
+ "ArmorItemMixin"
],
"client": [
"client.ClientPlayerInteractionManagerMixin",
diff --git a/fabric-item-api-v1/src/testmod/java/net/fabricmc/fabric/test/item/ArmorKnockbackResistanceTest.java b/fabric-item-api-v1/src/testmod/java/net/fabricmc/fabric/test/item/ArmorKnockbackResistanceTest.java
new file mode 100644
index 000000000..cfd3b68c4
--- /dev/null
+++ b/fabric-item-api-v1/src/testmod/java/net/fabricmc/fabric/test/item/ArmorKnockbackResistanceTest.java
@@ -0,0 +1,80 @@
+/*
+ * Copyright (c) 2016, 2017, 2018, 2019 FabricMC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package net.fabricmc.fabric.test.item;
+
+import net.minecraft.entity.EquipmentSlot;
+import net.minecraft.item.ArmorItem;
+import net.minecraft.item.ArmorMaterial;
+import net.minecraft.item.Item;
+import net.minecraft.recipe.Ingredient;
+import net.minecraft.sound.SoundEvent;
+import net.minecraft.sound.SoundEvents;
+import net.minecraft.tag.ItemTags;
+import net.minecraft.util.Identifier;
+import net.minecraft.util.registry.Registry;
+
+import net.fabricmc.api.ModInitializer;
+
+public class ArmorKnockbackResistanceTest implements ModInitializer {
+ private static final ArmorMaterial WOOD_ARMOR = new ArmorMaterial() {
+ @Override
+ public int getDurability(EquipmentSlot slot) {
+ return 50;
+ }
+
+ @Override
+ public int getProtectionAmount(EquipmentSlot slot) {
+ return 5;
+ }
+
+ @Override
+ public int getEnchantability() {
+ return 1;
+ }
+
+ @Override
+ public SoundEvent getEquipSound() {
+ return SoundEvents.ITEM_ARMOR_EQUIP_GENERIC;
+ }
+
+ @Override
+ public Ingredient getRepairIngredient() {
+ return Ingredient.fromTag(ItemTags.LOGS);
+ }
+
+ @Override
+ public String getName() {
+ return "wood";
+ }
+
+ @Override
+ public float getToughness() {
+ return 0.0F;
+ }
+
+ @Override
+ public float getKnockbackResistance() {
+ return 0.5F;
+ }
+ };
+
+ @Override
+ public void onInitialize() {
+ Registry.register(Registry.ITEM, new Identifier("fabric-item-api-v1-testmod",
+ "wooden_boots"), new ArmorItem(WOOD_ARMOR, EquipmentSlot.FEET, new Item.Settings()));
+ }
+}
diff --git a/fabric-item-api-v1/src/testmod/resources/assets/fabric-item-api-v1-testmod/models/item/wooden_boots.json b/fabric-item-api-v1/src/testmod/resources/assets/fabric-item-api-v1-testmod/models/item/wooden_boots.json
new file mode 100644
index 000000000..3afe800aa
--- /dev/null
+++ b/fabric-item-api-v1/src/testmod/resources/assets/fabric-item-api-v1-testmod/models/item/wooden_boots.json
@@ -0,0 +1,8 @@
+{
+ "parent": "minecraft:item/generated",
+ "textures": {
+ "layer0": "minecraft:block/oak_log",
+ "layer1": "minecraft:item/leather_boots",
+ "layer2": "minecraft:item/leather_boots_overlay"
+ }
+}
diff --git a/fabric-item-api-v1/src/testmod/resources/assets/minecraft/textures/models/armor/wood_layer_1.png b/fabric-item-api-v1/src/testmod/resources/assets/minecraft/textures/models/armor/wood_layer_1.png
new file mode 100644
index 000000000..d7c688207
Binary files /dev/null and b/fabric-item-api-v1/src/testmod/resources/assets/minecraft/textures/models/armor/wood_layer_1.png differ
diff --git a/fabric-item-api-v1/src/testmod/resources/assets/minecraft/textures/models/armor/wood_layer_2.png b/fabric-item-api-v1/src/testmod/resources/assets/minecraft/textures/models/armor/wood_layer_2.png
new file mode 100644
index 000000000..2fbda132c
Binary files /dev/null and b/fabric-item-api-v1/src/testmod/resources/assets/minecraft/textures/models/armor/wood_layer_2.png differ
diff --git a/fabric-item-api-v1/src/testmod/resources/fabric.mod.json b/fabric-item-api-v1/src/testmod/resources/fabric.mod.json
index 2750b292a..93e8e9873 100644
--- a/fabric-item-api-v1/src/testmod/resources/fabric.mod.json
+++ b/fabric-item-api-v1/src/testmod/resources/fabric.mod.json
@@ -13,7 +13,8 @@
"net.fabricmc.fabric.test.item.CustomDamageTest",
"net.fabricmc.fabric.test.item.FabricItemSettingsTests",
"net.fabricmc.fabric.test.item.ItemUpdateAnimationTest",
- "net.fabricmc.fabric.test.item.ModifyItemAttributeModifiersCallbackTest"
+ "net.fabricmc.fabric.test.item.ModifyItemAttributeModifiersCallbackTest",
+ "net.fabricmc.fabric.test.item.ArmorKnockbackResistanceTest"
],
"client": [
"net.fabricmc.fabric.test.item.client.TooltipTests"