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[1.12] Item Variants : NullPointerException at getUnlocalizedName


Dylem
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Hello, I tried to make variants for an item and I get a NullPointerException from this function (which is taken from ItemDye class) :

 

@Override
public String getUnlocalizedName(ItemStack stack) {

  int i = stack.getMetadata();
  return super.getUnlocalizedName() + "." + EnumVariant.byMetadata(i).getName();
}

 

However, when I remove the function, my 3 variants have the same unlocalized name so it doesn't load textures or names.

 

Crash logs : https://pastebin.com/WcPiNHMb

Full project code on github : https://github.com/dylem/DylemTestMod

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4 minutes ago, Dylem said:

Hello, I tried to make variants for an item and I get a NullPointerException from this function (which is taken from ItemDye class) :

 


@Override
public String getUnlocalizedName(ItemStack stack) {

  int i = stack.getMetadata();
  return super.getUnlocalizedName() + "." + EnumVariant.byMetadata(i).getName();
}

 

However, when I remove the function, my 3 variants have the same unlocalized name so it doesn't load textures or names.

 

Crash logs : https://pastebin.com/WcPiNHMb

Full project code on github : https://github.com/dylem/DylemTestMod

You never put any values in your EnumVariant.META_LOOKUP. You very well could use the EnumVariant#values()

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VANILLA MINECRAFT CLASSES ARE THE BEST RESOURCES WHEN MODDING

I will be posting 1.15.2 modding tutorials on this channel. If you want to be notified of it do the normal YouTube stuff like subscribing, ect.

Forge and vanilla BlockState generator.

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The logging of missing models was broken in Forge 1.12-14.21.0.2363 (commit dc043ac) and fixed in Forge 1.12-14.21.1.2390 (commit ede05a2). Update Forge and run Minecraft again to see the model errors.

Edited by Choonster
Fixed broken link.

Please don't PM me to ask for help. Asking your question in a public thread preserves it for people who are having the same problem in the future.

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3 hours ago, Choonster said:

The logging of missing models was broken in Forge 1.12-14.21.0.2363 (commit dc043ac) and fixed in Forge 1.12-14.21.1.2390 (commit ede05a2). Update Forge and run Minecraft again to see the model errors.

Thanks, I get the error now. Here it is : https://pastebin.com/0yRa9HMw

Apparently it says it doesn't find the file item_variants.json.

I thought I only needed the jsons for the variants ? I'm a bit confused. Do I need to set the first variant as the "base" and redirect to the other variants from its json ?

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As you can see in the log it cannot find the variant you specified. You specified "item_variants_c" as the variant, which you cannot satisfy with just an item model file, those always use "inventory" as the variant. You must use a blockstate json to specify a different variant.

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I made a blockstate but still get the same errors of missing models.

 

@Choonster how do you have no models for your variants in your testmod3 mod and still get it working with blockstates only ? I tried to do the same and get an incredible ammount of errors...

 

Edited by Dylem
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7 minutes ago, Dylem said:

I made a blockstate but still get the same errors of missing models.

 

@Choonster how do you have no models for your variants in your testmod3 mod and still get it working with blockstates only ? I tried to do the same and get an incredible ammount of errors...

 

 

Forge will automatically try to load the model you've specified for an Item from a blockstates file when it can't find an item model with that name. I have a more detailed description of the model loading process and how ModelResourceLocations are mapped to models here.

 

Are you sure you have a blockstates file called assets/test_mod/blockstates/item_variants.json with the variants test_mod:item_variants_atest_mod:item_variants_b and test_mod:item_variants_c? Variants don't usually have a domain, they're just a single string.

 

Post your blockstates file and its path.

Please don't PM me to ask for help. Asking your question in a public thread preserves it for people who are having the same problem in the future.

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30 minutes ago, Choonster said:

 

Forge will automatically try to load the model you've specified for an Item from a blockstates file when it can't find an item model with that name. I have a more detailed description of the model loading process and how ModelResourceLocations are mapped to models here.

 

Are you sure you have a blockstates file called assets/test_mod/blockstates/item_variants.json with the variants test_mod:item_variants_atest_mod:item_variants_b and test_mod:item_variants_c? Variants don't usually have a domain, they're just a single string.

 

Post your blockstates file and its path.

private void registerItemModelForMeta(final Item item, final int metadata, final ModelResourceLocation modelResourceLocation) {
	    	
	System.out.println(modelResourceLocation.toString());
	ModelLoader.setCustomModelResourceLocation(item, metadata, modelResourceLocation);
}

That prints :

[15:04:37] [main/INFO] [STDOUT]: [net.dylem.test_mod.init.ModItems$ModelHandler:registerItemModelForMeta:146]: test_mod:item_variants#test_mod:item_variants=a
[15:04:37] [main/INFO] [STDOUT]: [net.dylem.test_mod.init.ModItems$ModelHandler:registerItemModelForMeta:146]: test_mod:item_variants#test_mod:item_variants=b
[15:04:37] [main/INFO] [STDOUT]: [net.dylem.test_mod.init.ModItems$ModelHandler:registerItemModelForMeta:146]: test_mod:item_variants#test_mod:item_variants=c

 

Here is the json :

{
    "forge_marker": 1,
    "defaults": {
        "model": "item/generated"
    },
    "variants": {
        "variant": {
            "a": {
                "textures": {
                    "layer0": "test_mod:items/variants.a"
                }
            },
            "b": {
                "textures": {
                    "layer0": "test_mod:items/variants.b"
                }
            },
            "c": {
                "textures": {
                    "layer0": "test_mod:items/variants.c"
                }
            }
        }
    }
}

From what you did in your mod, that should work, shouldn't it ?

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Your JSON specifies 3 variants: "variant=a", "variant=b" and "variant=c". You tell Minecraft to load "test_mod:item_variants=a", "test_mod:item_variants=b" and "test_mod:item_variants=c".

Not sure what you expected but a "hey, I cannot find what you told me to load".

 

Always keep in mind: Variant strings are not specially parsed. They are simple strings. They either match exactly, or they don't.

Edited by diesieben07
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31 minutes ago, diesieben07 said:

Your JSON specifies 3 variants: "variant=a", "variant=b" and "variant=c". You tell Minecraft to load "test_mod:item_variants=a", "test_mod:item_variants=b" and "test_mod:item_variants=c".

Not sure what you expected but a "hey, I cannot find what you told me to load".

 

Always keep in mind: Variant strings are not specially parsed. They are simple strings. They either match exactly, or they don't.

Choonster did exactly what I did and it works for him, that's why I'm confused.

I tried to replace "variant" by "test_mod:item_variants", or just "item_variants" and it doesn't work either.

 

{
    "forge_marker": 1,
    "defaults": {
        "model": "test_mod:item/generated"
    },
    "variants": {
        "test_mod:item_variants": {
            "a": {
                "textures": {
                    "layer0": "test_mod:items/variants.a"
                }
            },
            "b": {
                "textures": {
                    "layer0": "test_mod:items/variants.b"
                }
            },
            "c": {
                "textures": {
                    "layer0": "test_mod:items/variants.c"
                }
            }
        }
    }
}

 

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Considering library org.ow2.asm:asm-tree:9.1 File exists: Checksum validated. Considering library org.ow2.asm:asm-tree:9.2 File exists: Checksum validated. Considering library org.ow2.asm:asm:9.1 File exists: Checksum validated. Considering library org.ow2.asm:asm:9.2 File exists: Checksum validated. Considering library trove:trove:1.0.2 File exists: Checksum validated. Created Temporary Directory: /tmp/forge_installer10859551180063758840 Extracting: /data/client.lzma Building Processors =============================================================================== MainClass: net.minecraftforge.installertools.ConsoleTool Classpath: /home/qila/.minecraft/libraries/net/minecraftforge/installertools/1.2.10/installertools-1.2.10.jar /home/qila/.minecraft/libraries/net/md-5/SpecialSource/1.10.0/SpecialSource-1.10.0.jar /home/qila/.minecraft/libraries/net/sf/jopt-simple/jopt-simple/5.0.4/jopt-simple-5.0.4.jar /home/qila/.minecraft/libraries/com/google/code/gson/gson/2.8.7/gson-2.8.7.jar /home/qila/.minecraft/libraries/de/siegmar/fastcsv/2.0.0/fastcsv-2.0.0.jar /home/qila/.minecraft/libraries/net/minecraftforge/srgutils/0.4.3/srgutils-0.4.3.jar /home/qila/.minecraft/libraries/org/ow2/asm/asm-commons/9.1/asm-commons-9.1.jar /home/qila/.minecraft/libraries/com/google/guava/guava/20.0/guava-20.0.jar /home/qila/.minecraft/libraries/com/opencsv/opencsv/4.4/opencsv-4.4.jar /home/qila/.minecraft/libraries/org/ow2/asm/asm-analysis/9.1/asm-analysis-9.1.jar /home/qila/.minecraft/libraries/org/ow2/asm/asm-tree/9.1/asm-tree-9.1.jar /home/qila/.minecraft/libraries/org/ow2/asm/asm/9.1/asm-9.1.jar /home/qila/.minecraft/libraries/org/apache/commons/commons-text/1.3/commons-text-1.3.jar /home/qila/.minecraft/libraries/org/apache/commons/commons-lang3/3.8.1/commons-lang3-3.8.1.jar /home/qila/.minecraft/libraries/commons-beanutils/commons-beanutils/1.9.3/commons-beanutils-1.9.3.jar /home/qila/.minecraft/libraries/org/apache/commons/commons-collections4/4.2/commons-collections4-4.2.jar /home/qila/.minecraft/libraries/commons-logging/commons-logging/1.2/commons-logging-1.2.jar /home/qila/.minecraft/libraries/commons-collections/commons-collections/3.2.2/commons-collections-3.2.2.jar Args: --task, MCP_DATA, --input, /home/qila/.minecraft/libraries/de/oceanlabs/mcp/mcp_config/1.18-20211130.085255/mcp_config-1.18-20211130.085255.zip, --output, /home/qila/.minecraft/libraries/de/oceanlabs/mcp/mcp_config/1.18-20211130.085255/mcp_config-1.18-20211130.085255-mappings.txt, --key, mappings Task: MCP_DATA Input: /home/qila/.minecraft/libraries/de/oceanlabs/mcp/mcp_config/1.18-20211130.085255/mcp_config-1.18-20211130.085255.zip Output: /home/qila/.minecraft/libraries/de/oceanlabs/mcp/mcp_config/1.18-20211130.085255/mcp_config-1.18-20211130.085255-mappings.txt Key: mappings Could not delete output file: /home/qila/.minecraft/libraries/de/oceanlabs/mcp/mcp_config/1.18-20211130.085255/mcp_config-1.18-20211130.085255-mappings.txt java.lang.RuntimeException: Could not delete output file: /home/qila/.minecraft/libraries/de/oceanlabs/mcp/mcp_config/1.18-20211130.085255/mcp_config-1.18-20211130.085255-mappings.txt at net.minecraftforge.installertools.Task.error(Task.java:28) at net.minecraftforge.installertools.McpData.process(McpData.java:63) at net.minecraftforge.installertools.ConsoleTool.main(ConsoleTool.java:55) at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:77) at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.base/java.lang.reflect.Method.invoke(Method.java:568) at net.minecraftforge.installer.actions.PostProcessors.process(PostProcessors.java:226) at net.minecraftforge.installer.actions.ClientInstall.run(ClientInstall.java:144) at net.minecraftforge.installer.InstallerPanel.run(InstallerPanel.java:423) at net.minecraftforge.installer.SimpleInstaller.launchGui(SimpleInstaller.java:175) at net.minecraftforge.installer.SimpleInstaller.main(SimpleInstaller.java:147)  
    • @RideableEntitiesModElements.ModElement.Tag public class BabytigerEntity extends RideableEntitiesModElements.ModElement { public static EntityType entity = (EntityType.Builder.<CustomEntity>create(CustomEntity::new, EntityClassification.MONSTER) .setShouldReceiveVelocityUpdates(true).setTrackingRange(64).setUpdateInterval(3).setCustomClientFactory(CustomEntity::new) .size(0.6f, 1.8f)).build("babytiger").setRegistryName("babytiger"); public BabytigerEntity(RideableEntitiesModElements instance) { super(instance, 4); FMLJavaModLoadingContext.get().getModEventBus().register(new BabytigerRenderer.ModelRegisterHandler()); FMLJavaModLoadingContext.get().getModEventBus().register(new EntityAttributesRegisterHandler()); MinecraftForge.EVENT_BUS.register(this); } @Override public void initElements() { elements.entities.add(() -> entity); elements.items .add(() -> new SpawnEggItem(entity, -1, -1, new Item.Properties().group(ItemGroup.MISC)).setRegistryName("babytiger_spawn_egg")); } @SubscribeEvent public void addFeatureToBiomes(BiomeLoadingEvent event) { event.getSpawns().getSpawner(EntityClassification.MONSTER).add(new MobSpawnInfo.Spawners(entity, 20, 4, 4)); } @Override public void init(FMLCommonSetupEvent event) { EntitySpawnPlacementRegistry.register(entity, EntitySpawnPlacementRegistry.PlacementType.ON_GROUND, Heightmap.Type.MOTION_BLOCKING_NO_LEAVES, MonsterEntity::canMonsterSpawn); } private static class EntityAttributesRegisterHandler { @SubscribeEvent public void onEntityAttributeCreation(EntityAttributeCreationEvent event) { AttributeModifierMap.MutableAttribute ammma = MobEntity.func_233666_p_(); ammma = ammma.createMutableAttribute(Attributes.MOVEMENT_SPEED, 0.8); ammma = ammma.createMutableAttribute(Attributes.MAX_HEALTH, 10); ammma = ammma.createMutableAttribute(Attributes.ARMOR, 0); ammma = ammma.createMutableAttribute(Attributes.ATTACK_DAMAGE, 3); event.put(entity, ammma.create()); } } public static class CustomEntity extends CreatureEntity { public CustomEntity(FMLPlayMessages.SpawnEntity packet, World world) { this(entity, world); } public CustomEntity(EntityType<CustomEntity> type, World world) { super(type, world); experienceValue = 0; setNoAI(false); } @Override public IPacket<?> createSpawnPacket() { return NetworkHooks.getEntitySpawningPacket(this); } @Override protected void registerGoals() { super.registerGoals(); this.goalSelector.addGoal(1, new MeleeAttackGoal(this, 1.2, false)); this.goalSelector.addGoal(2, new RandomWalkingGoal(this, 1)); this.targetSelector.addGoal(3, new HurtByTargetGoal(this)); this.goalSelector.addGoal(4, new LookRandomlyGoal(this)); this.goalSelector.addGoal(5, new SwimGoal(this)); } @Override public CreatureAttribute getCreatureAttribute() { return CreatureAttribute.UNDEFINED; } @Override public net.minecraft.util.SoundEvent getHurtSound(DamageSource ds) { return (net.minecraft.util.SoundEvent) ForgeRegistries.SOUND_EVENTS.getValue(new ResourceLocation("entity.generic.hurt")); } @Override public net.minecraft.util.SoundEvent getDeathSound() { return (net.minecraft.util.SoundEvent) ForgeRegistries.SOUND_EVENTS.getValue(new ResourceLocation("entity.generic.death")); } @Override public ActionResultType func_230254_b_(PlayerEntity sourceentity, Hand hand) { ItemStack itemstack = sourceentity.getHeldItem(hand); ActionResultType retval = ActionResultType.func_233537_a_(this.world.isRemote()); super.func_230254_b_(sourceentity, hand); sourceentity.startRiding(this); return retval; } @Override public void travel(Vector3d dir) { Entity entity = this.getPassengers().isEmpty() ? null : (Entity) this.getPassengers().get(0); if (this.isBeingRidden()) { this.rotationYaw = entity.rotationYaw; this.prevRotationYaw = this.rotationYaw; this.rotationPitch = entity.rotationPitch * 0.5F; this.setRotation(this.rotationYaw, this.rotationPitch); this.jumpMovementFactor = this.getAIMoveSpeed() * 0.15F; this.renderYawOffset = entity.rotationYaw; this.rotationYawHead = entity.rotationYaw; this.stepHeight = 1.0F; if (entity instanceof LivingEntity) { this.setAIMoveSpeed((float) this.getAttributeValue(Attributes.MOVEMENT_SPEED)); float forward = ((LivingEntity) entity).moveForward; float strafe = ((LivingEntity) entity).moveStrafing; super.travel(new Vector3d(strafe, 0, forward)); } this.prevLimbSwingAmount = this.limbSwingAmount; double d1 = this.getPosX() - this.prevPosX; double d0 = this.getPosZ() - this.prevPosZ; float f1 = MathHelper.sqrt(d1 * d1 + d0 * d0) * 4.0F; if (f1 > 1.0F) f1 = 1.0F; this.limbSwingAmount += (f1 - this.limbSwingAmount) * 0.4F; this.limbSwing += this.limbSwingAmount; return; } this.stepHeight = 0.5F; this.jumpMovementFactor = 0.02F; super.travel(dir); } } } ok thanks and for the people that want to copy paste here is the code
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