[1.15.2] Entity error

littlemonge · July 22, 2020

Hi ,

Im having some troubles working with entities...

Here is my custom entity class :

package littlemonge.rpgcraft.entity;

import littlemonge.rpgcraft.entity.base.RpgCraftBaseEntity;
import littlemonge.rpgcraft.item.DiamoniteItem;
import littlemonge.rpgcraft.utils.Utils;
import net.minecraft.block.Blocks;
import net.minecraft.entity.EntityType;
import net.minecraft.item.ItemStack;
import net.minecraft.world.World;

public class DiamoniteEntity extends RpgCraftBaseEntity {
	
	public static EntityType<DiamoniteEntity> ENTITY_TYPE;
	
	private int driedProgress = 0;
	
	public DiamoniteEntity(EntityType<? extends DiamoniteEntity> type, World world) {
        super(type, world);
    }

    public DiamoniteEntity(final World w, final double x, final double y, final double z, final ItemStack is) {
        super(ENTITY_TYPE, w, x, y, z, is);
        this.setNoDespawn();
    }

	@Override
	public void tick() {
		super.tick();
		
		final ItemStack itemStack = this.getItem();
		final DiamoniteItem diamonite = (DiamoniteItem) itemStack.getItem();
		
      
		if(this.onGround && (Utils.findBlockUnderEntity(this).equals(Blocks.MAGMA_BLOCK))){
			if(Utils.isClient()) {
				driedProgress++;
			}else {
				driedProgress += 0.5;
			}
		}
		
		if(driedProgress % 10 == 0 ) {
			  ItemStack newItem = diamonite.triggerDry(itemStack.copy());
              this.setItem(newItem);
		}
	}

}

Here is where I register the entity :

package littlemonge.rpgcraft.init;

import littlemonge.rpgcraft.entity.DiamoniteEntity;
import littlemonge.rpgcraft.utils.Reference;
import net.minecraft.entity.Entity;
import net.minecraft.entity.EntityClassification;
import net.minecraft.entity.EntityType;
import net.minecraftforge.event.RegistryEvent;
import net.minecraftforge.eventbus.api.SubscribeEvent;
import net.minecraftforge.fml.common.Mod;
import net.minecraftforge.registries.ObjectHolder;

@Mod.EventBusSubscriber(modid = Reference.MODID, bus = Mod.EventBusSubscriber.Bus.MOD)
@ObjectHolder(Reference.MODID)
public final class ModEntities {


	@SubscribeEvent
	public static void registerEntitites(RegistryEvent.Register<EntityType<?>> event) {
		init();
		event.getRegistry().registerAll(DiamoniteEntity.ENTITY_TYPE);
	}
	
	private static void init() {
		DiamoniteEntity.ENTITY_TYPE =  createEntityType(EntityType.Builder
				.<DiamoniteEntity>create(DiamoniteEntity::new, EntityClassification.MISC).size(0.25F, 0.25F)
				.setTrackingRange(64).setUpdateInterval(20).setShouldReceiveVelocityUpdates(false), Reference.DIAMONITE_ENTITY);
	}

	@SuppressWarnings("rawtypes")
	public static <T extends Entity> EntityType<T> createEntityType(EntityType.Builder builder, String name) {
		EntityType<T> type = (EntityType<T>) builder.build(Reference.MODID + '.' + name).setRegistryName(name);
		return type;
	}
}

And here its the crash :

java.lang.NullPointerException: null
	at net.minecraft.client.renderer.entity.EntityRendererManager.shouldRender(EntityRendererManager.java:232) ~[forge-1.15.2-31.0.14_mapped_snapshot_20200131-1.15.1-recomp.jar:?] {re:classloading,pl:accesstransformer:B,pl:runtimedistcleaner:A}
	at net.minecraft.client.renderer.WorldRenderer.getViewVector(WorldRenderer.java:940) ~[forge-1.15.2-31.0.14_mapped_snapshot_20200131-1.15.1-recomp.jar:?] {re:classloading,pl:runtimedistcleaner:A}
	at net.minecraft.client.renderer.GameRenderer.renderWorld(GameRenderer.java:612) ~[forge-1.15.2-31.0.14_mapped_snapshot_20200131-1.15.1-recomp.jar:?] {re:classloading,pl:accesstransformer:B,pl:runtimedistcleaner:A}
	at net.minecraft.client.renderer.GameRenderer.updateCameraAndRender(GameRenderer.java:434) ~[forge-1.15.2-31.0.14_mapped_snapshot_20200131-1.15.1-recomp.jar:?] {re:classloading,pl:accesstransformer:B,pl:runtimedistcleaner:A}
	at net.minecraft.client.Minecraft.runGameLoop(Minecraft.java:957) ~[forge-1.15.2-31.0.14_mapped_snapshot_20200131-1.15.1-recomp.jar:?] {re:classloading,pl:accesstransformer:B,pl:runtimedistcleaner:A}
	at net.minecraft.client.Minecraft.run(Minecraft.java:554) ~[forge-1.15.2-31.0.14_mapped_snapshot_20200131-1.15.1-recomp.jar:?] {re:classloading,pl:accesstransformer:B,pl:runtimedistcleaner:A}
	at net.minecraft.client.main.Main.main(Main.java:177) ~[forge-1.15.2-31.0.14_mapped_snapshot_20200131-1.15.1-recomp.jar:?] {re:classloading,pl:runtimedistcleaner:A}
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.8.0_231] {}
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[?:1.8.0_231] {}
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:1.8.0_231] {}
	at java.lang.reflect.Method.invoke(Method.java:498) ~[?:1.8.0_231] {}
	at net.minecraftforge.userdev.FMLUserdevClientLaunchProvider.lambda$launchService$0(FMLUserdevClientLaunchProvider.java:55) ~[forge-1.15.2-31.0.14_mapped_snapshot_20200131-1.15.1-recomp.jar:?] {}
	at cpw.mods.modlauncher.LaunchServiceHandlerDecorator.launch(LaunchServiceHandlerDecorator.java:37) [modlauncher-5.0.0-milestone.4.jar:?] {}
	at cpw.mods.modlauncher.LaunchServiceHandler.launch(LaunchServiceHandler.java:54) [modlauncher-5.0.0-milestone.4.jar:?] {}
	at cpw.mods.modlauncher.LaunchServiceHandler.launch(LaunchServiceHandler.java:72) [modlauncher-5.0.0-milestone.4.jar:?] {}
	at cpw.mods.modlauncher.Launcher.run(Launcher.java:81) [modlauncher-5.0.0-milestone.4.jar:?] {}
	at cpw.mods.modlauncher.Launcher.main(Launcher.java:65) [modlauncher-5.0.0-milestone.4.jar:?] {}
	at net.minecraftforge.userdev.LaunchTesting.main(LaunchTesting.java:102) [forge-1.15.2-31.0.14_mapped_snapshot_20200131-1.15.1-recomp.jar:?]

Can somebody please help me to find why im having a nullpointer?

Thanks in advance.

poopoodice · July 22, 2020

You need a renderer for your entity

littlemonge · July 23, 2020

Can't use minecraft basic renderer?

The entity is very simple, it is just a custom entity for an object when you throw it on the ground.

Novârch · July 23, 2020

2 minutes ago, littlemonge said:

it is just a custom entity for an object when you throw it on the ground

An ItemEntity, Minecraft (or Forge, idk) makes one for your items automatically.

littlemonge · July 23, 2020

Just now, Novârch said:

An ItemEntity, Minecraft (or Forge, idk) makes one for your items automatically.

Yes, but I want to add some logic to ItemEntity, that's why I created the class. The class "DiamoniteEntity" its the custom ItemEntity for my custom DiamoniteItem

poopoodice · July 23, 2020

The reason I said it is because I don't see you registering your renderer anywhere.

littlemonge · July 23, 2020

Could you send an example of a Renderer please?

poopoodice · July 23, 2020

I'm not sure if you need to create one, but it won't be hard since you said your entity is just another version of ItemEntity (just look into renderer/entity/ItemRenderer).

and use

RenderingRegistry.registerEntityRenderingHandler(entitytype, rendererf)

to register your renderer

littlemonge · July 23, 2020

Here is the renderer :

package littlemonge.rpgcraft.render;

import littlemonge.rpgcraft.entity.DiamoniteEntity;
import littlemonge.rpgcraft.utils.ResourceLocationReference;
import net.minecraft.client.renderer.culling.ClippingHelperImpl;
import net.minecraft.client.renderer.entity.EntityRenderer;
import net.minecraft.client.renderer.entity.EntityRendererManager;
import net.minecraft.entity.Entity;
import net.minecraft.util.ResourceLocation;

public class DiamoniteEntityRenderer<T extends Entity> extends EntityRenderer<DiamoniteEntity> {

	public DiamoniteEntityRenderer(EntityRendererManager renderManager) {
		super(renderManager);
	}

	@Override
	public ResourceLocation getEntityTexture(DiamoniteEntity entity) {
		
		return new ResourceLocation(ResourceLocationReference.DIAMONITE_MODEL);
	}

	@Override
	public boolean shouldRender(DiamoniteEntity livingEntityIn, ClippingHelperImpl camera, double camX, double camY,
			double camZ) {
		return false;
	}
}

1 hour ago, poopoodice said:
I'm not sure if you need to create one, but it won't be hard since you said your entity is just another version of ItemEntity (just look into renderer/entity/ItemRenderer).

and use
RenderingRegistry.registerEntityRenderingHandler(entitytype, rendererf)
to register your renderer

And this line its not working for me.

Novârch · July 23, 2020

4 minutes ago, littlemonge said:

And this line its not working for me.

Please don't tell me you copied it word for word.

littlemonge · July 23, 2020

have I to impl "IRenderFactory"?

Edited July 23, 2020 by littlemonge

littlemonge · July 23, 2020

31 minutes ago, littlemonge said:

have I to impl "IRenderFactory"?

ok no matter, I almost have it, the problem now is that the entity is invisible.

Novârch · July 23, 2020

28 minutes ago, littlemonge said:

ok no matter, I almost have it, the problem now is that the entity is invisible.

Try overriding Entity#createSpawnPacket in your entity and return NetworkHooks#getEntitySpawningPacket from it.

littlemonge · July 23, 2020

I did what you says but i can only see the hitboxes.

Could it be a problem with the path to the "png" with the texture?

poopoodice · July 23, 2020

firstly:

	@Override
	public boolean shouldRender(DiamoniteEntity livingEntityIn, ClippingHelperImpl camera, double camX, double camY,
			double camZ) {
		return false;
	}

secondly, you don't have any "render" method

@Override
public void render(...)

but isn't your entity bsaed on the ItemEntity? See how ItemRenderer does it.

Quote

ItemEntity (just look into renderer/entity/ItemRenderer)

Dzuchun · July 24, 2020

19 hours ago, littlemonge said:

I did what you says but i can only see the hitboxes.

Could it be a problem with the path to the "png" with the texture?

To check this, search your log for "FileNotFound" string. Likely will output only FileNotFoundException's stacktraces. All you need is to check comments after each - if minecraft can't find some texture that he needs, there would be a report about it.

You will likely find one about version checker file, don't care about that.

littlemonge · July 24, 2020

54 minutes ago, Dzuchun said:

To check this, search your log for "FileNotFound" string. Likely will output only FileNotFoundException's stacktraces. All you need is to check comments after each - if minecraft can't find some texture that he needs, there would be a report about it.

You will likely find one about version checker file, don't care about that.

Im not having any exception.

littlemonge · July 27, 2020

Here is my render Class :

package littlemonge.rpgcraft.render;

import com.mojang.blaze3d.matrix.MatrixStack;

import littlemonge.rpgcraft.entity.DiamoniteEntity;
import littlemonge.rpgcraft.utils.ResourceLocationReference;
import net.minecraft.client.renderer.IRenderTypeBuffer;
import net.minecraft.client.renderer.Vector3f;
import net.minecraft.client.renderer.entity.EntityRenderer;
import net.minecraft.client.renderer.entity.EntityRendererManager;
import net.minecraft.util.ResourceLocation;

public class DiamoniteEntityRenderer extends EntityRenderer<DiamoniteEntity> {

	public DiamoniteEntityRenderer(EntityRendererManager renderManagerIn) {
		super(renderManagerIn);
	}

	@Override
	public ResourceLocation getEntityTexture(DiamoniteEntity entity) {
		return new ResourceLocation(ResourceLocationReference.DIAMONITE_MODEL);
	}

	@Override
	public void render(DiamoniteEntity entityIn, float entityYaw, float partialTicks, MatrixStack matrixStackIn,
			IRenderTypeBuffer bufferIn, int packedLightIn) {
		matrixStackIn.push();
		matrixStackIn.scale(1f, 1f, 1f);
		matrixStackIn.translate(0.5d, 0.5D, 0.5D);
		matrixStackIn.rotate(Vector3f.YP.rotationDegrees(360));
		matrixStackIn.pop();
		super.render(entityIn, entityYaw, partialTicks, matrixStackIn, bufferIn, packedLightIn);
	}

}

where is the mistake¿?

Dzuchun · July 27, 2020

3 hours ago, littlemonge said:

matrixStackIn.push();

matrixStackIn.scale(1f, 1f, 1f);

matrixStackIn.translate(0.5d, 0.5D, 0.5D);

matrixStackIn.rotate(Vector3f.YP.rotationDegrees(360));

matrixStackIn.pop();

This actually renders nothing. Superclass method renders name label, as I understood, so I predict your entity is not rendered at all.

There are two ways how to render things (they do the same, but differ at usage).

1) Create a model for your entity. Model should have a separate render method which invokes ModelRenderer#render, that actually does rendering.

Advantage: you may not perform rendering itself; drawback: you'll need to understand how this all works (but that's easy with a ton of examples from vanilla Minecraft and some experimenting).

2) Preform rendering with "bare hands" - using GL11 methods directly or some predefined sequences.

Advantage: you may render most mind-blowing things that could ever come to your head; drawback: you'll need to study OpenGL a bit (well, depends on rendering complexity).

Read sign.

Edited July 27, 2020 by Dzuchun

littlemonge · August 14, 2020

On 7/27/2020 at 2:10 PM, Dzuchun said:

This actually renders nothing. Superclass method renders name label, as I understood, so I predict your entity is not rendered at all.

There are two ways how to render things (they do the same, but differ at usage).

1) Create a model for your entity. Model should have a separate render method which invokes ModelRenderer#render, that actually does rendering.

Advantage: you may not perform rendering itself; drawback: you'll need to understand how this all works (but that's easy with a ton of examples from vanilla Minecraft and some experimenting).

2) Preform rendering with "bare hands" - using GL11 methods directly or some predefined sequences.

Advantage: you may render most mind-blowing things that could ever come to your head; drawback: you'll need to study OpenGL a bit (well, depends on rendering complexity).

Read sign.

Can you bring me an example for method 1?

Thanks a lot for answering

Dzuchun · August 19, 2020

On 8/14/2020 at 9:21 AM, littlemonge said:

Can you bring me an example for method 1?

CowModel class and, I think, all the classes implementing EntityModel class (not sure)

Also, check blockbench.

Edited August 19, 2020 by Dzuchun

littlemonge · August 19, 2020

The entity i am trying to render it just an entity like ItemEntity, it is an entity that is created when player drops an item.

There is not a way to do it easy?

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[1.15.2] Entity error

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