Patch several mob classes to let them use modded versions of their ranged weapons (#7845)

src/test/java/net/minecraftforge/debug/item/RangedMobsUseModdedWeaponsTest.java

@@ -0,0 +1,99 @@
+/*
+ * Minecraft Forge
+ * Copyright (c) 2016-2021.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation version 2.1
+ * of the License.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+ */
+
+package net.minecraftforge.debug.item;
+
+import net.minecraft.item.*;
+import net.minecraft.util.ResourceLocation;
+import net.minecraftforge.api.distmarker.Dist;
+import net.minecraftforge.api.distmarker.OnlyIn;
+import net.minecraftforge.eventbus.api.IEventBus;
+import net.minecraftforge.fml.RegistryObject;
+import net.minecraftforge.fml.common.Mod;
+import net.minecraftforge.fml.event.lifecycle.FMLClientSetupEvent;
+import net.minecraftforge.fml.javafmlmod.FMLJavaModLoadingContext;
+import net.minecraftforge.registries.DeferredRegister;
+import net.minecraftforge.registries.ForgeRegistries;
+
+@Mod(RangedMobsUseModdedWeaponsTest.MOD_ID)
+public class RangedMobsUseModdedWeaponsTest {
+
+    //Testing if the new alternative for ProjectileHelper.getWeaponHoldingHand works for vanilla mobs
+    // as well as replacing their usages of LivingEntity#isHolding(Item) with LivingEntity#isHolding(Predicate<Item)
+    //Skeletons and Illusioners should be able to use the modded bow.
+    //Piglins and Pillagers should be able to use the modded crossbow.
+
+    public static final boolean ENABLE = true;
+
+    public static final String MOD_ID = "ranged_mobs_use_modded_weapons_test";
+    private static final DeferredRegister<Item> ITEMS = DeferredRegister.create(ForgeRegistries.ITEMS, MOD_ID);
+
+    private static final RegistryObject<Item> MODDED_BOW = ITEMS.register("modded_bow", () ->
+            new BowItem(new Item.Properties().tab(ItemGroup.TAB_COMBAT).defaultDurability(384))
+    );
+    private static final RegistryObject<Item> MODDED_CROSSBOW = ITEMS.register("modded_crossbow", () ->
+            new CrossbowItem(new Item.Properties().tab(ItemGroup.TAB_COMBAT).defaultDurability(326))
+    );
+
+    public RangedMobsUseModdedWeaponsTest()
+    {
+        if(ENABLE){
+            IEventBus modEventBus = FMLJavaModLoadingContext.get().getModEventBus();
+            ITEMS.register(modEventBus);
+            modEventBus.addListener(this::onClientSetup);
+        }
+    }
+
+    private void onClientSetup(FMLClientSetupEvent event)
+    {
+        RangedWeaponModeLProperties.initBowModelProperties();
+        RangedWeaponModeLProperties.initCrossbowModelProperties();
+    }
+
+    private static class RangedWeaponModeLProperties
+    {
+        static void initBowModelProperties()
+        {
+            ItemModelsProperties.register(MODDED_BOW.get(), new ResourceLocation("pull"), (itemStack, clientWorld, livingEntity) -> {
+                if (livingEntity == null)
+                {
+                    return 0.0F;
+                } else {
+                    return livingEntity.getUseItem() != itemStack ? 0.0F : (float)(itemStack.getUseDuration() - livingEntity.getUseItemRemainingTicks()) / 20.0F;
+                }
+            });
+            ItemModelsProperties.register(MODDED_BOW.get(), new ResourceLocation("pulling"), (itemStack, clientWorld, livingEntity) -> livingEntity != null && livingEntity.isUsingItem() && livingEntity.getUseItem() == itemStack ? 1.0F : 0.0F);
+        }
+
+        static void initCrossbowModelProperties()
+        {
+            ItemModelsProperties.register(MODDED_CROSSBOW.get(), new ResourceLocation("pull"), (itemStack, clientWorld, livingEntity) -> {
+                if (livingEntity == null)
+                {
+                    return 0.0F;
+                } else {
+                    return CrossbowItem.isCharged(itemStack) ? 0.0F : (float)(itemStack.getUseDuration() - livingEntity.getUseItemRemainingTicks()) / (float)CrossbowItem.getChargeDuration(itemStack);
+                }
+            });
+            ItemModelsProperties.register(MODDED_CROSSBOW.get(), new ResourceLocation("pulling"), (itemStack, clientWorld, livingEntity) -> livingEntity != null && livingEntity.isUsingItem() && livingEntity.getUseItem() == itemStack && !CrossbowItem.isCharged(itemStack) ? 1.0F : 0.0F);
+            ItemModelsProperties.register(MODDED_CROSSBOW.get(), new ResourceLocation("charged"), (itemStack, clientWorld, livingEntity) -> livingEntity != null && CrossbowItem.isCharged(itemStack) ? 1.0F : 0.0F);
+            ItemModelsProperties.register(MODDED_CROSSBOW.get(), new ResourceLocation("firework"), (itemStack, clientWorld, livingEntity) -> livingEntity != null && CrossbowItem.isCharged(itemStack) && CrossbowItem.containsChargedProjectile(itemStack, Items.FIREWORK_ROCKET) ? 1.0F : 0.0F);
+        }
+    }
+}