NindyBun

So I figured out that when I try to get the nbt tag in the RenderGameOverlayEvent it doesn't show the updated values, only the values made when the item was created. Therefore how would I get the current updated tag when playing on the dedicated server?

It might actually be this line that's causing the problem, but how else do I check if my itemstack is in a players hand so that I knows to draw the text?

So I have a FontRenderer that displays the Fuel value of my tool, on a singleplayer world the text updates fine but once I go on the server the same text does not update. So I'm assuming that I would have to send the server packet to the client, problem is how would I do that if I need a ServerPlayerEntity. My Font renderer: https://github.com/NindyBun/BurnerGun_1.16.5/blob/master/src/main/java/com/nindybun/burnergun/client/renderer/FuelValueRenderer.java package com.nindybun.burnergun.client.renderer; import com.nindybun.burnergun.common.BurnerGun; import com.nindybun.burnergun.common.items.upgrades.Upgrade; import com.nindybun.burnergun.common.network.PacketHandler; import net.minecraft.client.Minecraft; import net.minecraft.client.gui.FontRenderer; import net.minecraft.entity.player.PlayerEntity; import net.minecraft.item.ItemStack; import net.minecraftforge.api.distmarker.Dist; import net.minecraftforge.client.event.RenderGameOverlayEvent; import net.minecraftforge.eventbus.api.SubscribeEvent; import net.minecraftforge.fml.common.Mod; import net.minecraftforge.items.CapabilityItemHandler; import net.minecraftforge.items.IItemHandler; import org.apache.commons.lang3.StringUtils; import org.apache.logging.log4j.LogManager; import org.apache.logging.log4j.Logger; import javax.annotation.Nonnull; import java.awt.*; @Mod.EventBusSubscriber(modid = BurnerGun.MOD_ID, value = Dist.CLIENT) public class FuelValueRenderer { private static final Logger LOGGER = LogManager.getLogger(); private static final int base_buffer = com.nindybun.burnergun.common.items.Burner_Gun.BurnerGun.base_use_buffer; private static final int base_heat_buffer = com.nindybun.burnergun.common.items.Burner_Gun.BurnerGun.base_heat_buffer; @SubscribeEvent public static void renderOverlay(@Nonnull RenderGameOverlayEvent.Post event){ if (event.getType() == RenderGameOverlayEvent.ElementType.ALL){ ItemStack stack = ItemStack.EMPTY; PlayerEntity player = Minecraft.getInstance().player; if (player.getMainHandItem().getItem() instanceof com.nindybun.burnergun.common.items.Burner_Gun.BurnerGun) stack = player.getMainHandItem(); else if (player.getOffhandItem().getItem() instanceof com.nindybun.burnergun.common.items.Burner_Gun.BurnerGun) stack = player.getOffhandItem(); if (stack.getItem() instanceof com.nindybun.burnergun.common.items.Burner_Gun.BurnerGun) renderFuel(event, stack); } } public static void renderFuel(RenderGameOverlayEvent event, ItemStack stack){ FontRenderer fontRenderer = Minecraft.getInstance().font; IItemHandler handler = stack.getCapability(CapabilityItemHandler.ITEM_HANDLER_CAPABILITY).orElse(null); int level = stack.getTag().getInt("FuelValue"); int hLevel = stack.getTag().getInt("HeatValue"); Color color; if (level > base_buffer*3/4) color = Color.GREEN; else if (level > base_buffer*1/4 && level <= base_buffer*3/4) color = Color.ORANGE; else color = Color.RED; if (hLevel > base_heat_buffer*3/4) color = Color.RED; else if (hLevel > base_heat_buffer*1/4 && hLevel <= base_heat_buffer*3/4) color = Color.ORANGE; else color = Color.GREEN; //fontRenderer.drawString(event.getMatrixStack(), "Fuel level: "+level, 6, event.getWindow().getScaledHeight()-12, Color.WHITE.getRGB()); if (!handler.getStackInSlot(0).getItem().equals(Upgrade.UNIFUEL.getCard().getItem()) && !handler.getStackInSlot(0).getItem().equals(Upgrade.REACTOR.getCard().getItem())){ fontRenderer.draw(event.getMatrixStack(), "Fuel level: ", 6, event.getWindow().getGuiScaledHeight()-12, Color.WHITE.getRGB()); fontRenderer.draw(event.getMatrixStack(), level+"", 61, event.getWindow().getGuiScaledHeight()-12, color.getRGB()); }else if (handler.getStackInSlot(0).getItem().equals(Upgrade.REACTOR.getCard().getItem())){ double heat = (double)hLevel/base_heat_buffer*100; String heatString = heat+""; int deci = heatString.lastIndexOf("."); heatString = heatString.substring(0, deci+2); fontRenderer.draw(event.getMatrixStack(), "Heat level: ", 6, event.getWindow().getGuiScaledHeight()-12, Color.WHITE.getRGB()); fontRenderer.draw(event.getMatrixStack(), heatString+"%", 61, event.getWindow().getGuiScaledHeight()-12, color.getRGB()); } } } My packet handler package com.nindybun.burnergun.common.network; import com.nindybun.burnergun.common.BurnerGun; import com.nindybun.burnergun.common.network.packets.PacketOpenAutoFuelGui; import com.nindybun.burnergun.common.network.packets.PacketOpenBurnerGunGui; import com.nindybun.burnergun.common.network.packets.PacketOpenTrashGui; import com.nindybun.burnergun.common.network.packets.PacketOpenUpgradeBagGui; import net.minecraft.entity.player.ServerPlayerEntity; import net.minecraft.util.ResourceLocation; import net.minecraftforge.common.util.FakePlayer; import net.minecraftforge.fml.network.NetworkDirection; import net.minecraftforge.fml.network.NetworkRegistry; import net.minecraftforge.fml.network.simple.SimpleChannel; public class PacketHandler { private static final String PROTOCOL_VERSION = "2"; private static int index = 0; public static final SimpleChannel INSTANCE = NetworkRegistry.ChannelBuilder .named(new ResourceLocation(BurnerGun.MOD_ID, "main")) .clientAcceptedVersions(PROTOCOL_VERSION::equals) .serverAcceptedVersions(PROTOCOL_VERSION::equals) .networkProtocolVersion(() -> PROTOCOL_VERSION) .simpleChannel(); public static void register(){ int id = 0; INSTANCE.registerMessage(id++, PacketOpenBurnerGunGui.class, PacketOpenBurnerGunGui::encode, PacketOpenBurnerGunGui::decode, PacketOpenBurnerGunGui.Handler::handle); INSTANCE.registerMessage(id++, PacketOpenAutoFuelGui.class, PacketOpenAutoFuelGui::encode, PacketOpenAutoFuelGui::decode, PacketOpenAutoFuelGui.Handler::handle); INSTANCE.registerMessage(id++, PacketOpenTrashGui.class, PacketOpenTrashGui::encode, PacketOpenTrashGui::decode, PacketOpenTrashGui.Handler::handle); INSTANCE.registerMessage(id++, PacketOpenUpgradeBagGui.class, PacketOpenUpgradeBagGui::encode, PacketOpenUpgradeBagGui::decode, PacketOpenUpgradeBagGui.Handler::handle); } public static void sendTo(Object msg, ServerPlayerEntity player) { if (!(player instanceof FakePlayer)) INSTANCE.sendTo(msg, player.connection.connection, NetworkDirection.PLAY_TO_CLIENT); } public static void sendToServer(Object msg){ INSTANCE.sendToServer(msg); } } Yes I know, my coding is not the best looking.

I have two gui's/containers one with 8 slots and the other with 15. My tool opens the former container whenever you press a keybind, but I want to open the latter using the same tool. Essentially, if I pressed a certain keybind, the 15 slot container supersedes the original 8 slot container, therefor my tool it's container gains 7 more slots while retaining whatever's in it's previous inventory. Is there a way to go about this? https://github.com/NindyBun/TestMod

Actually, nvm I got it.

public class KeyInputHandler { private static final Logger LOGGER = LogManager.getLogger(); @SubscribeEvent public void onKeyInput(InputEvent.KeyInputEvent event) { PlayerEntity player = Minecraft.getInstance().player; if (Keybinds.test_item_gui_key.isPressed() && player.getHeldItemMainhand().getItem() instanceof ItemTestItem){ LOGGER.info("KEY PRESSED"); } } } How can I open my ItemTestItem's GUI when I press the C key? Right Now I am opening it from NetworkHooks in my ItemTestItem class. @Nonnull @Override public ActionResult<ItemStack> onItemRightClick(World world, PlayerEntity player, Hand handIn) { ItemStack stack = player.getHeldItem(handIn).getStack(); if (!world.isRemote){ if (player.isSneaking()){ INamedContainerProvider containerProviderTestItem = new ContainerProviderTestItem(this, stack); final int NUMBER_OF_SLOTS = 8; NetworkHooks.openGui((ServerPlayerEntity) player, containerProviderTestItem, (packetBuffer)-> packetBuffer.writeInt(NUMBER_OF_SLOTS);}); return ActionResult.resultSuccess(stack); } } } Here's the git repo if needed: https://github.com/NindyBun/TestMod/blob/master/src/main/java/com/nindybun/miningtool/KeyInputHandler.java Apologies in advance if my code is crude.

https://github.com/NindyBun/TestMod/blob/master/src/main/java/com/nindybun/miningtool/test_item/ItemStackHandlerTestItem.java

Basically I want to make an Item Filter that allows the player to set a copy of the held item stack into a slot.

So I returned stack.copy() and I am still holding the stack, but when I try to set stack in slot, it doesn't set the ItemStack.

My item container works fine, it acts as a normal bag; but I want to turn it into a filter, so how can I make my item container set/remove "ghost" items instead of setting/removing the physical item in a slot? Thanks in advance. Note: I am asleep so I won't be able to answer till I wake up.

I see it works now but why does checking that do things on the server?

Ah, the null is coming from world.getServer().getWorld(world.getDimension().getType()) where world.getServer() is null

oh...give me a while then, I've never done anything with Intellij Debugger before so I'm wandering about.

So it's saying to insert @NotNull for BlockState and World.

I know it's that line, but why is it wrong? What is making it null.

That's what I'm assuming as well.

I would if I knew why the LootContext#Builder is throwing an error.

I mean, the only thing I seem to be getting is a null pointer exception, and Idk why. It still gives me the result right before throwing an error so...if I just catch the error to prevent my game from crashing then all is fine right?

it do be like that. As long as it works I guess ¯\_(ツ)_/¯

try{ List list = state.getDrops(new LootContext.Builder(world.getServer().getWorld(world.getDimension().getType())) .withParameter(LootParameters.TOOL, stack) .withParameter(LootParameters.POSITION, pos) .withParameter(LootParameters.BLOCK_STATE, state) ); String string = list.get(0).toString(); int count = Integer.parseInt(string.substring(0, string.indexOf(" "))); LOGGER.info(count); ItemStack stackHandler = ItemStackHelper.getAndRemove(list, 0); Item item = stackHandler.getItem(); for (int i = 0; i < count; i++){ player.inventory.addItemStackToInventory(new ItemStack(item.getItem().asItem())); } }catch (Exception e){ } I got it working now

Actually, I just put it into a try catch block and it's fine now. But the number of drops are different from the actual drops in the world. Is that because both statements use a different random?

[10:52:02] [Render thread/INFO] [STDOUT/]: [net.minecraft.util.registry.Bootstrap:printToSYSOUT:110]: ---- Minecraft Crash Report ---- // Hi. I'm Minecraft, and I'm a crashaholic. Time: 3/11/21 10:52 AM Description: Unexpected error java.lang.NullPointerException: Unexpected error at com.nindybun.miningtool.test_item.ItemTestItem.onItemUse(ItemTestItem.java:219) ~[main/:?] {re:classloading} at net.minecraft.item.ItemStack.lambda$onItemUse$0(ItemStack.java:174) ~[forge-1.15.2-31.1.0_mapped_snapshot_20200507-1.15.1-recomp.jar:?] {re:classloading} at net.minecraft.item.ItemStack.onItemUse(ItemStack.java:189) ~[forge-1.15.2-31.1.0_mapped_snapshot_20200507-1.15.1-recomp.jar:?] {re:classloading} at net.minecraft.item.ItemStack.onItemUse(ItemStack.java:174) ~[forge-1.15.2-31.1.0_mapped_snapshot_20200507-1.15.1-recomp.jar:?] {re:classloading} at net.minecraft.client.multiplayer.PlayerController.func_217292_a(PlayerController.java:319) ~[forge-1.15.2-31.1.0_mapped_snapshot_20200507-1.15.1-recomp.jar:?] {re:classloading,pl:runtimedistcleaner:A} at net.minecraft.client.Minecraft.rightClickMouse(Minecraft.java:1334) ~[forge-1.15.2-31.1.0_mapped_snapshot_20200507-1.15.1-recomp.jar:?] {re:classloading,pl:accesstransformer:B,pl:runtimedistcleaner:A} at net.minecraft.client.Minecraft.processKeyBinds(Minecraft.java:1601) ~[forge-1.15.2-31.1.0_mapped_snapshot_20200507-1.15.1-recomp.jar:?] {re:classloading,pl:accesstransformer:B,pl:runtimedistcleaner:A} at net.minecraft.client.Minecraft.runTick(Minecraft.java:1434) ~[forge-1.15.2-31.1.0_mapped_snapshot_20200507-1.15.1-recomp.jar:?] {re:classloading,pl:accesstransformer:B,pl:runtimedistcleaner:A} at net.minecraft.client.Minecraft.runGameLoop(Minecraft.java:942) ~[forge-1.15.2-31.1.0_mapped_snapshot_20200507-1.15.1-recomp.jar:?] {re:classloading,pl:accesstransformer:B,pl:runtimedistcleaner:A} at net.minecraft.client.Minecraft.run(Minecraft.java:559) ~[forge-1.15.2-31.1.0_mapped_snapshot_20200507-1.15.1-recomp.jar:?] {re:classloading,pl:accesstransformer:B,pl:runtimedistcleaner:A} at net.minecraft.client.main.Main.main(Main.java:177) ~[forge-1.15.2-31.1.0_mapped_snapshot_20200507-1.15.1-recomp.jar:?] {re:classloading,pl:runtimedistcleaner:A} at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.8.0_251] {} at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[?:1.8.0_251] {} at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:1.8.0_251] {} at java.lang.reflect.Method.invoke(Method.java:498) ~[?:1.8.0_251] {} at net.minecraftforge.userdev.FMLUserdevClientLaunchProvider.lambda$launchService$0(FMLUserdevClientLaunchProvider.java:55) ~[forge-1.15.2-31.1.0_mapped_snapshot_20200507-1.15.1-recomp.jar:?] {} at cpw.mods.modlauncher.LaunchServiceHandlerDecorator.launch(LaunchServiceHandlerDecorator.java:37) [modlauncher-5.0.0-milestone.4.jar:?] {} at cpw.mods.modlauncher.LaunchServiceHandler.launch(LaunchServiceHandler.java:54) [modlauncher-5.0.0-milestone.4.jar:?] {} at cpw.mods.modlauncher.LaunchServiceHandler.launch(LaunchServiceHandler.java:72) [modlauncher-5.0.0-milestone.4.jar:?] {} at cpw.mods.modlauncher.Launcher.run(Launcher.java:81) [modlauncher-5.0.0-milestone.4.jar:?] {} at cpw.mods.modlauncher.Launcher.main(Launcher.java:65) [modlauncher-5.0.0-milestone.4.jar:?] {} at net.minecraftforge.userdev.LaunchTesting.main(LaunchTesting.java:102) [forge-1.15.2-31.1.0_mapped_snapshot_20200507-1.15.1-recomp.jar:?] {} A detailed walkthrough of the error, its code path and all known details is as follows: --------------------------------------------------------------------------------------- -- Head -- Thread: Render thread Stacktrace: at com.nindybun.miningtool.test_item.ItemTestItem.onItemUse(ItemTestItem.java:219) at net.minecraft.item.ItemStack.lambda$onItemUse$0(ItemStack.java:174) at net.minecraft.item.ItemStack.onItemUse(ItemStack.java:189) at net.minecraft.item.ItemStack.onItemUse(ItemStack.java:174) at net.minecraft.client.multiplayer.PlayerController.func_217292_a(PlayerController.java:319) at net.minecraft.client.Minecraft.rightClickMouse(Minecraft.java:1334) at net.minecraft.client.Minecraft.processKeyBinds(Minecraft.java:1601) -- Affected level -- Details: All players: 1 total; [ClientPlayerEntity['Dev'/62, l='MpServer', x=-534.87, y=64.00, z=134.57]] Chunk stats: Client Chunk Cache: 841, 140 Level dimension: DimensionType{minecraft:overworld} Level name: MpServer Level seed: 8179760609708042029 Level generator: ID 00 - default, ver 1. Features enabled: false Level generator options: {} Level spawn location: World: (-160,63,-16), Chunk: (at 0,3,0 in -10,-1; contains blocks -160,0,-16 to -145,255,-1), Region: (-1,-1; contains chunks -32,-32 to -1,-1, blocks -512,0,-512 to -1,255,-1) Level time: 370469 game time, 1144 day time Known server brands: Level was modded: false Level storage version: 0x00000 - Unknown? Level weather: Rain time: 0 (now: true), thunder time: 0 (now: false) Level game mode: Game mode: survival (ID 0). Hardcore: false. Cheats: false Server brand: forge Server type: Integrated singleplayer server Stacktrace: at net.minecraft.client.world.ClientWorld.fillCrashReport(ClientWorld.java:457) at net.minecraft.client.Minecraft.addGraphicsAndWorldToCrashReport(Minecraft.java:1840) at net.minecraft.client.Minecraft.run(Minecraft.java:578) at net.minecraft.client.main.Main.main(Main.java:177) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:498) at net.minecraftforge.userdev.FMLUserdevClientLaunchProvider.lambda$launchService$0(FMLUserdevClientLaunchProvider.java:55) at cpw.mods.modlauncher.LaunchServiceHandlerDecorator.launch(LaunchServiceHandlerDecorator.java:37) at cpw.mods.modlauncher.LaunchServiceHandler.launch(LaunchServiceHandler.java:54) at cpw.mods.modlauncher.LaunchServiceHandler.launch(LaunchServiceHandler.java:72) at cpw.mods.modlauncher.Launcher.run(Launcher.java:81) at cpw.mods.modlauncher.Launcher.main(Launcher.java:65) at net.minecraftforge.userdev.LaunchTesting.main(LaunchTesting.java:102) -- System Details -- Details: Minecraft Version: 1.15.2 Minecraft Version ID: 1.15.2 Operating System: Windows 10 (amd64) version 10.0 Java Version: 1.8.0_251, Oracle Corporation Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation Memory: 755686792 bytes (720 MB) / 2043674624 bytes (1949 MB) up to 3803185152 bytes (3627 MB) CPUs: 16 JVM Flags: 1 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump ModLauncher: 5.0.0-milestone.4+67+b1a340b ModLauncher launch target: fmluserdevclient ModLauncher naming: mcp ModLauncher services: /eventbus-2.0.0-milestone.1-service.jar eventbus PLUGINSERVICE /forge-1.15.2-31.1.0_mapped_snapshot_20200507-1.15.1-launcher.jar object_holder_definalize PLUGINSERVICE /forge-1.15.2-31.1.0_mapped_snapshot_20200507-1.15.1-launcher.jar runtime_enum_extender PLUGINSERVICE /accesstransformers-2.0.0-milestone.1-shadowed.jar accesstransformer PLUGINSERVICE /forge-1.15.2-31.1.0_mapped_snapshot_20200507-1.15.1-launcher.jar capability_inject_definalize PLUGINSERVICE /forge-1.15.2-31.1.0_mapped_snapshot_20200507-1.15.1-launcher.jar runtimedistcleaner PLUGINSERVICE /forge-1.15.2-31.1.0_mapped_snapshot_20200507-1.15.1-launcher.jar fml TRANSFORMATIONSERVICE FML: 31.1 Forge: net.minecraftforge:31.1.0 FML Language Providers: javafml@31.1 minecraft@1 Mod List: client-extra.jar Minecraft {minecraft@1.15.2 DONE} main Mining Tool {miningtool@1.15.2-1.0.0 DONE} forge-1.15.2-31.1.0_mapped_snapshot_20200507-1.15.1-recomp.jar Forge {forge@31.1.0 DONE} Launched Version: MOD_DEV Backend library: LWJGL version 3.2.2 build 10 Backend API: GeForce GTX 1050 Ti/PCIe/SSE2 GL version 4.6.0 NVIDIA 456.71, NVIDIA Corporation GL Caps: Using framebuffer using OpenGL 3.0 Using VBOs: Yes Is Modded: Definitely; Client brand changed to 'forge' Type: Client (map_client.txt) Resource Packs: Current Language: English (US) CPU: 16x AMD Ryzen 7 1700X Eight-Core Processor [10:52:02] [Render thread/INFO] [STDOUT/]: [net.minecraft.util.registry.Bootstrap:printToSYSOUT:110]: #@!@# Game crashed! Crash report saved to: #@!@# C:\Users\ANDY\Desktop\Minecraft Modding\MiningTool\run\.\crash-reports\crash-2021-03-11_10.52.02-client.txt AL lib: (EE) alc_cleanup: 1 device not closed Process finished with exit code -1

LootContext.Builder lootcontext = (new LootContext.Builder(world.getServer().getWorld(world.getDimension().getType()))).withParameter(LootParameters.POSITION, pos).withParameter(LootParameters.BLOCK_STATE, state).withParameter(LootParameters.TOOL, stack).withNullableParameter(LootParameters.THIS_ENTITY, player).withNullableParameter(LootParameters.BLOCK_ENTITY, world.getTileEntity(pos)); LOGGER.info(state.getDrops(lootcontext)); [10:52:01] [Render thread/FATAL] [minecraft/Minecraft]: Unreported exception thrown! java.lang.NullPointerException: null at com.nindybun.miningtool.test_item.ItemTestItem.onItemUse(ItemTestItem.java:219) ~[main/:?] {re:classloading} at net.minecraft.item.ItemStack.lambda$onItemUse$0(ItemStack.java:174) ~[forge-1.15.2-31.1.0_mapped_snapshot_20200507-1.15.1-recomp.jar:?] {re:classloading} at net.minecraft.item.ItemStack.onItemUse(ItemStack.java:189) ~[forge-1.15.2-31.1.0_mapped_snapshot_20200507-1.15.1-recomp.jar:?] {re:classloading} at net.minecraft.item.ItemStack.onItemUse(ItemStack.java:174) ~[forge-1.15.2-31.1.0_mapped_snapshot_20200507-1.15.1-recomp.jar:?] {re:classloading} at net.minecraft.client.multiplayer.PlayerController.func_217292_a(PlayerController.java:319) ~[forge-1.15.2-31.1.0_mapped_snapshot_20200507-1.15.1-recomp.jar:?] {re:classloading,pl:runtimedistcleaner:A} at net.minecraft.client.Minecraft.rightClickMouse(Minecraft.java:1334) ~[forge-1.15.2-31.1.0_mapped_snapshot_20200507-1.15.1-recomp.jar:?] {re:classloading,pl:accesstransformer:B,pl:runtimedistcleaner:A} at net.minecraft.client.Minecraft.processKeyBinds(Minecraft.java:1601) ~[forge-1.15.2-31.1.0_mapped_snapshot_20200507-1.15.1-recomp.jar:?] {re:classloading,pl:accesstransformer:B,pl:runtimedistcleaner:A} at net.minecraft.client.Minecraft.runTick(Minecraft.java:1434) ~[forge-1.15.2-31.1.0_mapped_snapshot_20200507-1.15.1-recomp.jar:?] {re:classloading,pl:accesstransformer:B,pl:runtimedistcleaner:A} at net.minecraft.client.Minecraft.runGameLoop(Minecraft.java:942) ~[forge-1.15.2-31.1.0_mapped_snapshot_20200507-1.15.1-recomp.jar:?] {re:classloading,pl:accesstransformer:B,pl:runtimedistcleaner:A} at net.minecraft.client.Minecraft.run(Minecraft.java:559) ~[forge-1.15.2-31.1.0_mapped_snapshot_20200507-1.15.1-recomp.jar:?] {re:classloading,pl:accesstransformer:B,pl:runtimedistcleaner:A} at net.minecraft.client.main.Main.main(Main.java:177) ~[forge-1.15.2-31.1.0_mapped_snapshot_20200507-1.15.1-recomp.jar:?] {re:classloading,pl:runtimedistcleaner:A} at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.8.0_251] {} at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[?:1.8.0_251] {} at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:1.8.0_251] {} at java.lang.reflect.Method.invoke(Method.java:498) ~[?:1.8.0_251] {} at net.minecraftforge.userdev.FMLUserdevClientLaunchProvider.lambda$launchService$0(FMLUserdevClientLaunchProvider.java:55) ~[forge-1.15.2-31.1.0_mapped_snapshot_20200507-1.15.1-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-1.15.2-31.1.0_mapped_snapshot_20200507-1.15.1-recomp.jar:?] {}

So I practically took the LootContext#Builder from vanilla but I get a Null pointer exception from it @Override public ActionResultType onItemUse(ItemUseContext context) { refuel(context.getItem(), context.getPlayer()); int fuelValue = 0; int fortune = 0; int silkTouch = 0; if (context.getItem().hasTag()) { if (context.getItem().getTag().contains("FuelValue")) { fuelValue = context.getItem().getTag().getInt("FuelValue"); } if (context.getItem().getTag().contains("SilkTouch")) { silkTouch = context.getItem().getTag().getInt("SilkTouch"); }else if (context.getItem().getTag().contains("Fortune")) { fortune = context.getItem().getTag().getInt("Fortune"); } } World world = context.getWorld(); ItemStack stack = context.getItem(); BlockPos pos = context.getPos(); BlockState state = context.getWorld().getBlockState(pos); PlayerEntity player = context.getPlayer(); Block block = world.getBlockState(pos).getBlock(); stack.addEnchantment(Enchantments.FORTUNE, 3); if (fuelValue >= use){ //context.getWorld().destroyBlock(context.getPos(), true); if (block.removedByPlayer(state, world, pos, player, true, state.getFluidState())){ //BlockEvent.BreakEvent event = new BlockEvent.BreakEvent(world, pos, state, player); block.dropXpOnBlockBreak(world, pos, block.getExpDrop(state, world, pos, fortune, silkTouch)); block.harvestBlock(world, player, pos, state, world.getTileEntity(pos), stack); LootContext.Builder lootcontext = (new LootContext.Builder(world.getServer().getWorld(world.getDimension().getType()))).withRandom(world.rand).withParameter(LootParameters.POSITION, pos).withParameter(LootParameters.TOOL, stack).withNullableParameter(LootParameters.THIS_ENTITY, player).withNullableParameter(LootParameters.BLOCK_ENTITY, world.getTileEntity(pos)); LOGGER.info(state.getDrops(lootcontext)); //event.getWorld().destroyBlock(pos, false); //event.getWorld().playSound(context.getPlayer(), event.getPos(), event.getState().getSoundType().getBreakSound(), SoundCategory.BLOCKS, event.getState().getSoundType().getVolume(), event.getState().getSoundType().getPitch()); //context.getWorld().setBlockState(context.getPos(), Blocks.AIR.getDefaultState()); } fuelValue -= use; context.getItem().getTag().putInt("FuelValue", context.getItem().getTag().getInt("FuelValue")-use); } stack.getEnchantmentTagList().clear(); return ActionResultType.SUCCESS; }

The Block#getDrop has a parameter of Builder, what would go into that?