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[1.7.10] (SOLVED) make the player jump to a set position


sigurd4

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i have a set position stored in an item that i want to make the player jump towards. i took a look at the knockback function in EntityLivingBase and figured i could try that, but qith the oposite coordinates so that the player jumps towards it and not away from it. so i put this in a packet reciever thingy which is called by a clientside event handler with keys and such. but nothing happens. i have set breakpoints to test if the code is ran and they do in fact stop the game, so i really dont know. this is my code:

					int blockX = (int)((NBTTagList)itemstack.stackTagCompound.getTag("HookCoords")).func_150309_d(0);
					int blockY = (int)((NBTTagList)itemstack.stackTagCompound.getTag("HookCoords")).func_150309_d(1);
					int blockZ = (int)((NBTTagList)itemstack.stackTagCompound.getTag("HookCoords")).func_150309_d(2);
                        double d1 = -(blockX - player.posX);
                        double d0 = -(blockZ - player.posZ);
		            player.isAirBorne = true;
		            float f1 = MathHelper.sqrt_double(d1 * d1 + d0 * d0);
		            float f2 = 0.4F;
		            player.motionX /= 2.0D;
		            player.motionY /= 2.0D;
		            player.motionZ /= 2.0D;
		            player.motionX -= d1 / (double)f1 * (double)f2;
		            player.motionY += (double)f2;
		            player.motionZ -= d1 / (double)f1 * (double)f2;

		            if (player.motionY > 0.4000000059604645D)
		            {
		            	player.motionY = 0.4000000059604645D;
		            }

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I'm making the bioshock mod!

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package com.sigurd4.Bioshock.items;

import java.util.List;

import com.sigurd4.Bioshock.BioshockMod;
import com.sigurd4.Bioshock.entity.projectiles.EntityBullet;
import com.sigurd4.Bioshock.entity.projectiles.targeter.EntityTargeter;
import com.sigurd4.Bioshock.entity.projectiles.targeter.EntityTargeterSkyHook;

import net.minecraft.block.Block;
import net.minecraft.client.renderer.texture.IIconRegister;
import net.minecraft.entity.Entity;
import net.minecraft.entity.EntityLivingBase;
import net.minecraft.entity.player.EntityPlayer;
import net.minecraft.item.Item;
import net.minecraft.item.ItemStack;
import net.minecraft.nbt.NBTTagCompound;
import net.minecraft.nbt.NBTTagInt;
import net.minecraft.nbt.NBTTagList;
import net.minecraft.potion.Potion;
import net.minecraft.potion.PotionEffect;
import net.minecraft.util.IIcon;
import net.minecraft.util.MathHelper;
import net.minecraft.world.World;

public class ItemWeaponSkyHook extends ItemWeaponMelee
{
public boolean clickSounds;

public float damage;

public int timer;

private IIcon spinningTexture;

/**
 * Ride rails or use it as a brutal melee weapon!
 */
public ItemWeaponSkyHook(float damage, boolean clickSounds)
{
	super(damage, 0);
	this.weaponDamage = 0;
	this.damage = damage;
	this.timer = 0;
	this.clickSounds = clickSounds;
	this.setMaxStackSize(1);
	this.setCreativeTab(BioshockMod.tabBioshockModWeapons);
	this.setUnlocalizedName("weaponSkyHook");
	this.setTextureName("bioshock:sky_hook");
}

public void registerIcons(IIconRegister iconReg)
{
	this.itemIcon = iconReg.registerIcon(this.iconString);
	this.spinningTexture = iconReg.registerIcon(this.iconString+"_spinning");
}

public IIcon getIcon(ItemStack itemstack, int pass)
{
	if(itemstack.stackTagCompound.getInteger("Timer") > 0)
	{
		return this.spinningTexture;
	}
	else
	{
		return this.itemIcon;
	}
}

public void onUpdate(ItemStack itemstack, World world, Entity entity, int par4, boolean par5)
{
	if(itemstack.stackTagCompound == null)
	{
		itemstack.setTagCompound(new NBTTagCompound());
	}

	if(itemstack.stackTagCompound.getInteger("Timer") > -1)
	{
		this.weaponDamage = this.damage+itemstack.stackTagCompound.getInteger("Timer")/10;
	}
	else
	{
		this.weaponDamage = 0;
	}
	if(entity.motionY > 0)
	{
		this.weaponDamage = this.weaponDamage*((float)entity.motionY+2);
	}
	else
	{
		this.weaponDamage = this.weaponDamage*(-(float)entity.motionY+2);
	}
	if(entity.rotationPitch > 0)
	{
		this.weaponDamage = this.weaponDamage+entity.rotationPitch/60;
	}
	if(entity.fallDistance < 10)
	{
		this.weaponDamage = this.weaponDamage+entity.fallDistance/2;
	}
	else
	{
		this.weaponDamage = this.weaponDamage+10;
	}
	if(entity instanceof EntityPlayer)
	{
		if(((EntityPlayer)entity).isSprinting())
		{
			++this.weaponDamage;
		}
	}
	if(itemstack.stackTagCompound.getInteger("Timer") > -1)
	{
		this.weaponDamage = this.weaponDamage-6.47F;
	}
	else
	{
		this.weaponDamage = this.weaponDamage/2;
	}

	if(entity instanceof EntityLivingBase)
	{
		if(((EntityLivingBase)entity).getHeldItem() == itemstack)
		{
			EntityTargeterSkyHook targeter = new EntityTargeterSkyHook(world, (EntityPlayer)entity);
			targeter.isFirst = (itemstack.stackTagCompound.getInteger("CanHook") <= 0);
			world.spawnEntityInWorld(targeter);
			if(!itemstack.stackTagCompound.hasKey("CanHook"))
			{
				itemstack.stackTagCompound.setInteger("CanHook", 0);
			}
			if(itemstack.stackTagCompound.getInteger("CanHook") <= 0)
			{
				itemstack.stackTagCompound.removeTag("HookCoords");
			}
			if(itemstack.stackTagCompound.getInteger("CanHook") > -1)
			{
				itemstack.stackTagCompound.setInteger("CanHook", itemstack.stackTagCompound.getInteger("CanHook")-1);
			}
			if(itemstack.stackTagCompound.getInteger("Timer") == 1)
			{
				entity.playSound("bioshock:item.weapon.skyhook.motor.end", 1.0F+(this.clickSounds ? 0.4F : 0), 1.0F);
			}
			if(itemstack.stackTagCompound.getInteger("Timer") == 
			{
				entity.playSound("bioshock:item.weapon.skyhook.motor", 1.0F+(this.clickSounds ? 0.2F : 0), 1.0F);
			}
			if(itemstack.stackTagCompound.getInteger("Timer") > -2)
			{
				itemstack.stackTagCompound.setInteger("Timer", itemstack.stackTagCompound.getInteger("Timer")-1);
			}
			if(this.clickSounds && (itemstack.stackTagCompound.getInteger("Timer") == 3 || itemstack.stackTagCompound.getInteger("Timer") == 6))
			{
				entity.playSound("random.click", 0.02F+this.itemRand.nextFloat()*0.1F, 0.9F+this.itemRand.nextFloat()*1.8F);
			}
			if(itemstack.stackTagCompound.getInteger("CanHook") >= 100)
			{
				this.jumpToHook(itemstack, (EntityLivingBase)entity);
				itemstack.stackTagCompound.setInteger("CanHook", -2);
			}
		}
		else
		{
			if(itemstack.stackTagCompound.getInteger("Timer") > 0)
			{
				entity.playSound("bioshock:item.weapon.skyhook.motor.end", 1.0F+(this.clickSounds ? 0.4F : 0), 1.0F);
			}
			itemstack.stackTagCompound.setInteger("Timer", 0);
		}
	}
}

public void onCreated(ItemStack itemstack, World world, EntityPlayer player)
{
	if(itemstack.stackTagCompound == null)
	{
		itemstack.setTagCompound(new NBTTagCompound());
	}
	if(!itemstack.stackTagCompound.hasKey("Timer"))
	{
		itemstack.stackTagCompound.setInteger("Timer", timer);
	}
}

@SuppressWarnings("rawtypes")
public void addInformation(ItemStack itemstack, EntityPlayer player, List list, boolean bool)
{
	if(itemstack.stackTagCompound == null)
	{
		itemstack.setTagCompound(new NBTTagCompound());
	}
	if(!itemstack.stackTagCompound.hasKey("Timer"))
	{
		itemstack.stackTagCompound.setInteger("Timer", timer);
	}
}

public ItemStack onItemRightClick(ItemStack itemstack, World world, EntityPlayer player)
{
	if(itemstack.stackTagCompound.getInteger("Timer") <= 2)
	{
		itemstack.stackTagCompound.setInteger("Timer", 9);
		if(itemstack.stackTagCompound.getInteger("Timer") <= 0)
		{
			player.playSound("bioshock:item.weapon.skyhook.motor.start", 1.0F+(this.clickSounds ? 0.2F : 0), 1.0F);
		}
		else if(this.clickSounds)
		{
			player.playSound("random.click", 0.02F+this.itemRand.nextFloat()*0.1F, 0.9F+this.itemRand.nextFloat()*1.8F);
		}
	}
	return itemstack;
}


@Override
public boolean hitEntity(ItemStack itemstack, EntityLivingBase target, EntityLivingBase user)
{
	if(target instanceof EntityLivingBase)
	{
		if(((EntityLivingBase)target).getMaxHealth() > 10)
		{
			itemstack.stackTagCompound.setInteger("Timer", 0);
		}
		if(((EntityLivingBase)target).getHealth() < 15 && !(target instanceof EntityPlayer))
		{
			((EntityLivingBase)target).addPotionEffect(new PotionEffect(Potion.weakness.id, 20, 1, true));
		}
	}
	return super.hitEntity(itemstack, target, user);
}

/**
 * Metadata-sensitive version of getStrVsBlock
 * @param itemstack The Item Stack
 * @param block The block the item is trying to break
 * @param metadata The items current metadata
 * @return The damage strength
 */
public float getDigSpeed(ItemStack itemstack, Block block, int metadata)
{
	if(itemstack.stackTagCompound.getInteger("Timer") > 0)
	{
		return 0.001F;
	}
	else
	{
		return func_150893_a(itemstack, block);
	}
}

/**
 * Callback for item usage. If the item does something special on right clicking, he will have one of those. Return
 * True if something happen and false if it don't. This is for ITEMS, not BLOCKS
 */
public boolean onItemUse(ItemStack itemstack, EntityPlayer plaer, World world, int x, int y, int z, int side, float p_77648_8_, float p_77648_9_, float p_77648_10_)
{
	return false;
}

public void jumpToHook(ItemStack itemstack, EntityLivingBase entity)
{
	if(entity.getHeldItem() == itemstack)
	{
		if(itemstack.stackTagCompound != null && itemstack.stackTagCompound.getInteger("CanHook") > 0 && itemstack.stackTagCompound.hasKey("HookCoords") && ((NBTTagList)itemstack.stackTagCompound.getTag("HookCoords")).tagCount() >= 3 && itemstack.stackTagCompound.getInteger("Timer") > 0)
		{
			int blockX = (int)((NBTTagList)itemstack.stackTagCompound.getTag("HookCoords")).func_150309_d(0);
			int blockY = (int)((NBTTagList)itemstack.stackTagCompound.getTag("HookCoords")).func_150309_d(1);
			int blockZ = (int)((NBTTagList)itemstack.stackTagCompound.getTag("HookCoords")).func_150309_d(2);
			double d1 = blockX - entity.posX;
			double d0 = blockZ - entity.posZ;
			entity.isAirBorne = true;
			float f1 = MathHelper.sqrt_double(d1 * d1 + d0 * d0);
			float f2 = 0.4F;
			entity.motionX /= 2.0D;
			entity.motionY /= 2.0D;
			entity.motionZ /= 2.0D;
			entity.motionX -= d1 / (double)f1 * (double)f2;
			entity.motionY += (double)f2;
			entity.motionZ -= d1 / (double)f1 * (double)f2;

			if (entity.motionY > 0.4000000059604645D)
			{
				entity.motionY = 0.4000000059604645D;
			}
		}
	}
}
}

this is the code in my key bind packet receiver thingy:

		else if(i == 4)
		{
			if(player.getEquipmentInSlot(1) != null) if(player.getEquipmentInSlot(1).getItem() instanceof ItemArmorDivingSuit)
			{
				if (player.isInWater())
				{
					player.setJumping(true);
					player.jump();
				}
			}
			if(player.getHeldItem().getItem() instanceof ItemWeaponSkyHook)
			{
				ItemStack itemstack = player.getHeldItem();
				if(itemstack.stackTagCompound != null && itemstack.stackTagCompound.getInteger("CanHook") > 0 && itemstack.stackTagCompound.hasKey("HookCoords") && ((NBTTagList)itemstack.stackTagCompound.getTag("HookCoords")).tagCount() >= 3 && itemstack.stackTagCompound.getInteger("Timer") > 0)
				{
					itemstack.stackTagCompound.setInteger("CanHook", 1000);
				}
			}
		}

and this is the code in the EntityTargeterSkyHook class:

package com.sigurd4.Bioshock.entity.projectiles.targeter;

import com.sigurd4.Bioshock.items.ItemWeaponSkyHook;

import net.minecraft.block.Block;
import net.minecraft.client.Minecraft;
import net.minecraft.client.audio.ISound;
import net.minecraft.client.audio.PositionedSoundRecord;
import net.minecraft.entity.EntityLivingBase;
import net.minecraft.init.Blocks;
import net.minecraft.nbt.NBTTagInt;
import net.minecraft.nbt.NBTTagList;
import net.minecraft.util.MovingObjectPosition;
import net.minecraft.util.ResourceLocation;
import net.minecraft.world.World;

public class EntityTargeterSkyHook extends EntityTargeter
{
public float scale = 0.0F;
public boolean isFirst = false;
protected final ISound sound = PositionedSoundRecord.func_147673_a(new ResourceLocation("bioshock:item.weapon.skyhook.target"));

public EntityTargeterSkyHook(World par1World)
{
	super(par1World);
	this.setSize(scale, scale);
}

public EntityTargeterSkyHook(World par1World, EntityLivingBase par2EntityLivingBase)
{
	super(par1World, par2EntityLivingBase);
	this.setSize(scale, scale);
}

public EntityTargeterSkyHook(World par1World, double par2, double par4, double par6)
{
	super(par1World, par2, par4, par6);
	this.setSize(scale, scale);
}

protected void onImpact(MovingObjectPosition pos)
{
	if(this.getThrower() != null)
	{
		Block block = this.worldObj.getBlock(pos.blockX, pos.blockY, pos.blockZ);
		if(block.getBlockHardness(this.worldObj, pos.blockX, pos.blockY, pos.blockZ) > 0)
		{
			if(this.getThrower().getHeldItem() != null && this.checkIfBlockValid(pos.blockX, pos.blockY, pos.blockZ, block, this.worldObj))
			{
				if(this.getThrower().getHeldItem().getItem() instanceof ItemWeaponSkyHook)
				{
					NBTTagList oldHookCoords = (NBTTagList)this.getThrower().getHeldItem().getTagCompound().getTag("HookCoords");
					this.getThrower().getHeldItem().stackTagCompound.removeTag("HookCoords");
					NBTTagList hookCoords = new NBTTagList();
					hookCoords.appendTag(new NBTTagInt(pos.blockX));
					hookCoords.appendTag(new NBTTagInt(pos.blockY));
					hookCoords.appendTag(new NBTTagInt(pos.blockZ));
					if(oldHookCoords == null || (this.isFirst && oldHookCoords.func_150303_d() == 3))
					{
						if(oldHookCoords == null || (this.getThrower().getHeldItem().getTagCompound().getInteger("CanHook") <= 0 && (oldHookCoords.func_150309_d(0) != pos.blockX || oldHookCoords.func_150309_d(1) != pos.blockY || oldHookCoords.func_150309_d(2) != pos.blockZ) && Minecraft.getMinecraft().getSoundHandler().isSoundPlaying(sound)))
						{
							Minecraft.getMinecraft().getSoundHandler().stopSound(sound);
							Minecraft.getMinecraft().getSoundHandler().playSound(sound);
						}
					}
					this.getThrower().getHeldItem().stackTagCompound.setTag("HookCoords", hookCoords);
					this.getThrower().getHeldItem().getTagCompound().setInteger("CanHook", 4);
				}
			}
			this.setDead();
		}
	}
	else
	{
		this.setDead();
	}
}

protected boolean checkIfBlockValid(int x, int y, int z, Block block, World world)
{
	//vanilla iron bars
	if(Block.getIdFromBlock(block) == Block.getIdFromBlock(Blocks.iron_bars))
	{
		if(world.isAirBlock(x+1, y, z) && world.isAirBlock(x-1, y, z))
		{
			if(world.isAirBlock(x, y, z+1) && world.isAirBlock(x, y, z-1))
			{
				if(world.isAirBlock(x, y-1, z) && world.isAirBlock(x, y-2, z) && !world.isAirBlock(x, y+1, z))
				{
					return true;
				}
			}
		}
	}
	return false;
}
}

it worked after restarting the game (i had just been running it in debug mode previosuly, though it seems adding new code doesn't always work without restarting the game). it does however not push the player in the right direction. it allways pushes them towards noth-west. any clue on how to fix that? also, about the data tags, the tag my data tag is located in is a list. there doesn't seem to be any getInteger() function for lists, only compounds.

http://www.planetminecraft.com/member/sigurd4

I'm making the bioshock mod!

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Integer is NBT tag type 3.

 

Unfortunately, there is no method getIntTagAt(pos) in NBTTagList. However...

 

You can use "int n = (NBTTagInt)(nbtTagList1.removeTag( 0));" to get and remove the first int tag from the list. (repeat until nbtTagList1.tagCount() == 0)

 

You can add ints with "nbtTagList1.func_150304_a(pos++, new NBTTagInt( number));"

 

 

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i did as you said and changed the code slightly. now the throw strength depends on how far away the player is from the position and seems to be fairly accurate, however it only throws the player towards south-west, and not towards the coordinates. i really dont get it. what would be the correct formula to set the velocity the player needs in order to hit a specific goal?

 

code:

			NBTBase tag2 = hookCoords.removeTag(2);
			NBTBase tag1 = hookCoords.removeTag(1);
			NBTBase tag0 = hookCoords.removeTag(0);
			for(int i = hookCoords.tagCount(); i > 0; --i)
			{
				hookCoords.removeTag(i-1);
			}
			int blockX = (int)Math.floor(entity.posX);
			int blockY = (int)Math.floor(entity.posY);
			int blockZ = (int)Math.floor(entity.posZ);
			if(tag0 instanceof NBTTagInt)
			{
				blockX = ((NBTTagInt)tag0).func_150287_d();
			}
			if(tag1 instanceof NBTTagInt)
			{
				blockY = ((NBTTagInt)tag1).func_150287_d();
			}
			if(tag2 instanceof NBTTagInt)
			{
				blockZ = ((NBTTagInt)tag2).func_150287_d();
			}
			hookCoords.appendTag(new NBTTagInt(blockX));
			hookCoords.appendTag(new NBTTagInt(blockY));
			hookCoords.appendTag(new NBTTagInt(blockZ));
			double d0 = blockX-(blockX - entity.posX);
			double d1 = blockZ-(blockY - entity.posY);
			double d2 = blockZ-(blockZ - entity.posZ);
			entity.isAirBorne = true;
			float f1 = MathHelper.sqrt_double(d0 * d0 + d2 * d2 + d1 * d1);
			float f2 = (float)entity.getDistance((double)blockX+0.5D, (double)blockY+0.5D, (double)blockZ+0.5D)*0.1F;
			entity.motionX /= 2.0D;
			entity.motionY /= 2.0D;
			entity.motionZ /= 2.0D;
			entity.motionX += d0 / (double)f1 * (double)f2;
			entity.motionY += d1 / (double)f1 * (double)f2;
			entity.motionZ += d2 / (double)f1 * (double)f2;

http://www.planetminecraft.com/member/sigurd4

I'm making the bioshock mod!

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These here don't make any sense.

    double d0 = blockX-(blockX - entity.posX);
    double d1 = blockZ-(blockY - entity.posY);
    double d2 = blockZ-(blockZ - entity.posZ);

blockX - (blockX - posX) ... is the same as

blockX - blockX + posX ... is same as

posX

 

So, as it is written it will always compute distance from (0,0,0) to the entity. Not very useful.

 

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This would allow you to have a clean API for other mods to use, while keeping your internal implementation details hidden from IDE hints, helping prevent accidental usage of internals that might break without prior notice. This is particularly useful if you'd like to use public records with module-private constructors or partially module-private record components, as you can create a sealed interface that only your record implements, having the interface be exported and the record hidden. It's also nice for declaring and using services, as you'll get compile-time errors from the Java compiler for typos and the like, rather than deferring to runtime errors. In more advanced cases, you can also have public methods that are only accessible to specific other modules -- handy if you want internal interactions between multiple of your own mods.   How do I bypass it? We understand there may be drama in implementing a system that prevents mods from accessing each other's internals when necessary (like when a mod is abandoned or you need to fix a compat issue) -- after all, we are already modding a game that doesn't have explicit support for Java mods yet. We have already thought of this and are offering APIs from day one to selectively bypass module restrictions. Let me be clear: Forge mods are not required to use JPMS. If you don't want to use it, you don't have to. The default behaviour is to have fully open, fully exported automatic modules. In Java, you can use the `Add-Opens` and `Add-Exports` manifest attributes to selectively bypass module restrictions of other mods at launch time, and we've added explicit support for these when loading your Forge mods. At compile-time, you can use existing solutions such as the extra-java-module-info Gradle plugin to deal with non-modular dependencies and add extra opens and exports to other modules. Here's an example on how to make the internal package `com.example.examplemod.internal` open to your mod in your build.gradle: tasks.named('jar', Jar) { manifest { attributes([ 'Add-Opens' : 'com.example.examplemod/com.example.examplemod.internal' 'Specification-Title' : mod_id, 'Specification-Vendor' : mod_authors // (...) ]) } } With the above in your mod's jar manifest, you can now reflectively access the classes inside that internal package. Multiple entries are separated with a space, as per Java's official spec. You can also use Add-Exports to directly call without reflection, however you'd need to use the Gradle plugin mentioned earlier to be able to compile. The syntax for Add-Exports is the same as Add-Opens, and instructions for the compile-time step with the Gradle plugin are detailed later in this post. Remember to prefer the opens and exports keywords inside module-info.java for sources you control. The Add-Opens/Add-Exports attributes are only intended for forcing open other mods.   What else is new with module support? Previously, the runtime module name was always forced to the first mod ID in your `mods.toml` file and all packages were forced fully open and exported. Module names are now distinguished from mod IDs, meaning the module name in your module-info.java can be different from the mod ID in your `mods.toml`. This allows you to have a more descriptive module name that doesn't have to be the same as your mod ID, however we strongly recommend including your mod ID as part of your module name to aid troubleshooting. The `Automatic-Module-Name` manifest attribute is now also honoured, allowing you to specify a module name for your mod without needing to create a `module-info.java` file. This is particularly useful for mods that don't care about JPMS features but want to have a more descriptive module name and easier integration with other mods that do use JPMS.   How do I use it? The first step is to create a `module-info.java` file in your mod's source directory. This file should be in the same package as your main mod class, and should look something like this: open module com.example.examplemod { requires net.minecraftforge.eventbus; requires net.minecraftforge.fmlcore; requires net.minecraftforge.forge; requires net.minecraftforge.javafmlmod; requires net.minecraftforge.mergetool.api; requires org.slf4j; requires logging; } For now, we're leaving the whole module open to reflection, which is a good starting point. When we know we want to close something off, we can remove the open modifier from the module and open or export individual packages instead. Remember that you need to be open to Forge (module name net.minecraftforge.forge), otherwise it can't call your mod's constructor. Next is fixing modules in Gradle. While Forge and Java support modules properly, Gradle does not put automatic modules on the module path by default, meaning that the logging module (from com.mojang:logging) is not found. To fix this, add the Gradle plugin and add a compile-time module definition for that Mojang library: plugins { // (...) id 'org.gradlex.extra-java-module-info' version "1.9" } // (...) extraJavaModuleInfo { failOnMissingModuleInfo = false automaticModule("com.mojang:logging", "logging") } The automatic module override specified in your build.gradle should match the runtime one to avoid errors. You can do the same for any library or mod dependency that is missing either a module-info or explicit Automatic-Module-Name, however be aware that you may need to update your mod once said library adds one. That's all you need to get started with module support in your mods. You can learn more about modules and how to use them at dev.java.
    • Faire la mise à jour grâce à ce lien m'a aider personnellement, merci à @Paint_Ninja. https://www.amd.com/en/support 
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