[1.10.2] Player.getCapability(...) problem

fdsatrew · August 6, 2016

Hello everyone, i'm new in minecraft modding and i write mod where i need custom player inventory. Because of this i follow next tutorial https://github.com/coolAlias/Forge_Tutorials/blob/master/CustomPlayerInventory.java(thanks alot this guy for make this tutorial) and updating it to match my minecraft version and forge version(forge-1.10.2-12.18.1.2011-mdk). Of course everything can't be easy and i got this error when i press my custom key...

[spoiler=Error log]

[09:03:04] [server thread/INFO]: Saving and pausing game...
[09:03:04] [server thread/INFO]: Saving chunks for level 'New World'/Overworld
[09:03:04] [server thread/INFO]: Saving chunks for level 'New World'/Nether
[09:03:04] [server thread/INFO]: Saving chunks for level 'New World'/The End
[09:03:06] [server thread/INFO] [sTDOUT]: [fdsatrew.network.handlers.PlayerInventoryPacketHandler$1:run:21]: Received gui packet with id 0 from Player297
[09:03:06] [server thread/FATAL]: Error executing task
java.util.concurrent.ExecutionException: java.lang.ClassCastException: net.minecraftforge.common.capabilities.Capability cannot be cast to fdsatrew.capability.api.IPlayerCapability
at java.util.concurrent.FutureTask.report(Unknown Source) ~[?:1.8.0_102]
at java.util.concurrent.FutureTask.get(Unknown Source) ~[?:1.8.0_102]
at net.minecraft.util.Util.runTask(Util.java:26) [util.class:?]
at net.minecraft.server.MinecraftServer.updateTimeLightAndEntities(MinecraftServer.java:742) [MinecraftServer.class:?]
at net.minecraft.server.MinecraftServer.tick(MinecraftServer.java:687) [MinecraftServer.class:?]
at net.minecraft.server.integrated.IntegratedServer.tick(IntegratedServer.java:156) [integratedServer.class:?]
at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:536) [MinecraftServer.class:?]
at java.lang.Thread.run(Unknown Source) [?:1.8.0_102]
Caused by: java.lang.ClassCastException: net.minecraftforge.common.capabilities.Capability cannot be cast to fdsatrew.capability.api.IPlayerCapability
at fdsatrew.GuiHandler.getServerGuiElement(GuiHandler.java:20) ~[GuiHandler.class:?]
at net.minecraftforge.fml.common.network.NetworkRegistry.getRemoteGuiContainer(NetworkRegistry.java:251) ~[NetworkRegistry.class:?]
at net.minecraftforge.fml.common.network.internal.FMLNetworkHandler.openGui(FMLNetworkHandler.java:87) ~[FMLNetworkHandler.class:?]
at net.minecraft.entity.player.EntityPlayer.openGui(EntityPlayer.java:2723) ~[EntityPlayer.class:?]
at fdsatrew.network.handlers.PlayerInventoryPacketHandler$1.run(PlayerInventoryPacketHandler.java:22) ~[PlayerInventoryPacketHandler$1.class:?]
at java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source) ~[?:1.8.0_102]
at java.util.concurrent.FutureTask.run(Unknown Source) ~[?:1.8.0_102]
at net.minecraft.util.Util.runTask(Util.java:25) ~[util.class:?]
... 5 more

Here is my code:

[spoiler=Main mod init & attach capability event]

    @EventHandler
    public void preInit(FMLPreInitializationEvent event) {
    	MinecraftForge.EVENT_BUS.register(this);
        proxy.preInit(event);
        NetworkRegistry.INSTANCE.registerGuiHandler(this, new GuiHandler());
        network = NetworkRegistry.INSTANCE.newSimpleChannel("fdsatrew");
    	network.registerMessage(PlayerInventoryPacketHandler.class, PlayerInventoryPacket.class, 0, Side.SERVER);
    }

    @SubscribeEvent
public void AttachCapability(AttachCapabilitiesEvent.Entity e)
{
	if(!e.getEntity().hasCapability(PlayerProvider.PLAYER_CAPABILITY, null) && e.getEntity() instanceof EntityPlayer)
		e.addCapability(Capabilities.PLAYER_CAPABILITY_ID, new PlayerProvider());
}

[spoiler=Client & Server Proxy]

public class CommonProxy {
    public void preInit(FMLPreInitializationEvent e) {
        Blocks.init();
        Items.init();
        Capabilities.init();
    }

    public void init(FMLInitializationEvent e) {

    }

    public void postInit(FMLPostInitializationEvent e) {

    }
}

public class ClientProxy extends CommonProxy {

@Override
    public void preInit(FMLPreInitializationEvent e) {
        super.preInit(e);
        Render.init();
    	MinecraftForge.EVENT_BUS.register(new KeyHandler());
    }
}
public class ServerProxy extends CommonProxy {

}

[spoiler=Key Handler]

public class KeyHandler {

public static KeyBinding openInventoryKey = new KeyBinding("fdsatrew.key.inventory", Keyboard.KEY_H, "key.categories.fdsatrew");

public KeyHandler()
{
	ClientRegistry.registerKeyBinding(openInventoryKey);
}	

    @SubscribeEvent
    public void onKey(KeyInputEvent evt) {
        if (openInventoryKey.isPressed()) {
            Main.network.sendToServer(new PlayerInventoryPacket(Main.GUI_CUSTOM_INV));
        }
    }
}

[spoiler=Gui Handler]

public class GuiHandler implements IGuiHandler {

private static int guiIndex = 0;
public static final int guiCustomInv = guiIndex++;

@Override
public Object getServerGuiElement(int guiId, EntityPlayer player, World world, int x, int y, int z)
{
	if(player.hasCapability(PlayerProvider.PLAYER_CAPABILITY, null)) {
		IPlayerCapability playerCapability = player.getCapability(PlayerProvider.PLAYER_CAPABILITY, null);
		if (guiId == guiCustomInv) {
			returnpackage fdsatrew;

import fdsatrew.capability.PlayerProvider;
import fdsatrew.capability.api.IPlayerCapability;
import fdsatrew.player.gui.GuiCustomPlayerInventory;
import fdsatrew.player.inventory.ContainerCustomPlayer;
import net.minecraft.entity.player.EntityPlayer;
import net.minecraft.world.World;
import net.minecraftforge.fml.common.network.IGuiHandler;

public class GuiHandler implements IGuiHandler {

@Override
public Object getServerGuiElement(int guiId, EntityPlayer player, World world, int x, int y, int z) {
	if (player.hasCapability(PlayerProvider.PLAYER_CAPABILITY, null)) {
		IPlayerCapability playerCapability = player.getCapability(PlayerProvider.PLAYER_CAPABILITY, null);
		if (guiId == Main.GUI_CUSTOM_INV) {
			return new ContainerCustomPlayer(player, player.inventory, playerCapability.inventory);
		} else {
			return null;
		}
	}
	return null;
}

@Override
public Object getClientGuiElement(int guiId, EntityPlayer player, World world, int x, int y, int z) {
	if (player.hasCapability(PlayerProvider.PLAYER_CAPABILITY, null)) {
		IPlayerCapability playerCapability = player.getCapability(PlayerProvider.PLAYER_CAPABILITY, null);
		if (guiId == Main.GUI_CUSTOM_INV) {
			return new GuiCustomPlayerInventory(player, player.inventory, playerCapability.inventory);
		} else {
			return null;
		}
	}
	return null;
}
}

[spoiler=Capability register?]

public class Capabilities {

public static ResourceLocation PLAYER_CAPABILITY_ID = new ResourceLocation(Main.MODID, "IPlayerCapability");

public static void init() {
	CapabilityManager.INSTANCE.register(IPlayerCapability.class, PlayerCapability.PlayerStorage.playerStorage, PlayerCapability.class);
}
}

[spoiler=Capability code itself]

public class PlayerCapability implements IPlayerCapability {

public static class PlayerStorage implements IStorage<IPlayerCapability> {

	public static final PlayerStorage playerStorage = new PlayerStorage();
    
	@Override
    public NBTBase writeNBT(Capability<IPlayerCapability> capability, IPlayerCapability instance, EnumFacing side) {
		NBTTagCompound nbt = new NBTTagCompound();
	    NBTTagList list = new NBTTagList();
	    for (int i = 0; i < inventory.getSizeInventory(); ++i) {
	        if (inventory.getStackInSlot(i) != null) {
	            NBTTagCompound stackTag = new NBTTagCompound();
	            stackTag.setByte("Slot", (byte) i);
	            inventory.getStackInSlot(i).writeToNBT(stackTag);
	            list.appendTag(stackTag);
	        }
	    }
	    nbt.setTag("Items", list);
		return nbt;
    }

    @Override
    public void readNBT(Capability<IPlayerCapability> capability, IPlayerCapability instance, EnumFacing side, NBTBase nbt) {
    	NBTTagCompound compound = (NBTTagCompound)nbt;
    	NBTTagList list = compound.getTagList("Items", 10);
	    for (int i = 0; i < list.tagCount(); ++i) {
	        NBTTagCompound stackTag = list.getCompoundTagAt(i);
	        int slot = stackTag.getByte("Slot") & 255;
	        inventory.setInventorySlotContents(slot, ItemStack.loadItemStackFromNBT(stackTag));
	    }
    }
 }
}
public class PlayerProvider implements ICapabilityProvider, INBTSerializable {

@CapabilityInject(IPlayerCapability.class)
public static final Capability<IPlayerCapability> PLAYER_CAPABILITY = null;

private IPlayerCapability playerCapability = PLAYER_CAPABILITY.getDefaultInstance();

@Override
public NBTBase serializeNBT() {
	return PLAYER_CAPABILITY.getStorage().writeNBT(PLAYER_CAPABILITY, playerCapability, null);
}

@Override
public void deserializeNBT(NBTBase nbt) {
	PLAYER_CAPABILITY.getStorage().readNBT(PLAYER_CAPABILITY, playerCapability, null, nbt);
}

@Override
public boolean hasCapability(Capability<?> capability, EnumFacing facing) {
	return PLAYER_CAPABILITY != null && capability == PLAYER_CAPABILITY;
}

@Override
public <T> T getCapability(Capability<T> capability, EnumFacing facing) {
        if (PLAYER_CAPABILITY != null && capability == PLAYER_CAPABILITY) return (T)PLAYER_CAPABILITY;
        return null;
}
}
public interface IPlayerCapability {

static InventoryCustomPlayer inventory = new InventoryCustomPlayer();

}

[spoiler=Packet & handler]

public class PlayerInventoryPacket implements IMessage {
    
public int id;

    public PlayerInventoryPacket() { }

    public PlayerInventoryPacket(int id) {
        this.id = id;
    }

    @Override
    public void fromBytes(ByteBuf buf) {
    	id = ByteBufUtils.readVarInt(buf, 1);
    }

    @Override
    public void toBytes(ByteBuf buf) {
        ByteBufUtils.writeVarInt(buf, id, 1);
    }
}
public class PlayerInventoryPacketHandler implements IMessageHandler<PlayerInventoryPacket, IMessage> {

        @Override
        public IMessage onMessage(final PlayerInventoryPacket message, final MessageContext ctx) {
            IThreadListener mainThread = (WorldServer) ctx.getServerHandler().playerEntity.worldObj; // or Minecraft.getMinecraft() on the client
            mainThread.addScheduledTask(new Runnable() {
                @Override
                public void run() {
                    EntityPlayerMP player = ctx.getServerHandler().playerEntity;
                    System.out.println(String.format("Received gui packet with id %s from %s", message.id, player.getName()));
                    player.openGui(Main.instance, message.id, player.worldObj, (int)player.posX, (int)player.posY, (int)player.posZ);
                }
            });
            return null; // no response in this case
        }
}

If you could help me with this issue, that would be nice and appreciated.

P.S. I want make multiplayer mod as you can see.

Animefan8888 · August 6, 2016

PlayerCapability cannot be cast to IPlayerCapabilty....

IPlayerCapability is your own class

fdsatrew · August 6, 2016

PlayerCapability cannot be cast to IPlayerCapabilty....

IPlayerCapability is your own class

I remove cast to my class and got same error:

[spoiler=Error]

09:42:26] [server thread/FATAL]: Error executing task
java.util.concurrent.ExecutionException: java.lang.ClassCastException: net.minecraftforge.common.capabilities.Capability cannot be cast to fdsatrew.capability.api.IPlayerCapability
at java.util.concurrent.FutureTask.report(Unknown Source) ~[?:1.8.0_102]
at java.util.concurrent.FutureTask.get(Unknown Source) ~[?:1.8.0_102]
at net.minecraft.util.Util.runTask(Util.java:26) [util.class:?]
at net.minecraft.server.MinecraftServer.updateTimeLightAndEntities(MinecraftServer.java:742) [MinecraftServer.class:?]
at net.minecraft.server.MinecraftServer.tick(MinecraftServer.java:687) [MinecraftServer.class:?]
at net.minecraft.server.integrated.IntegratedServer.tick(IntegratedServer.java:156) [integratedServer.class:?]
at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:536) [MinecraftServer.class:?]
at java.lang.Thread.run(Unknown Source) [?:1.8.0_102]
Caused by: java.lang.ClassCastException: net.minecraftforge.common.capabilities.Capability cannot be cast to fdsatrew.capability.api.IPlayerCapability
at fdsatrew.GuiHandler.getServerGuiElement(GuiHandler.java:17) ~[GuiHandler.class:?]
at net.minecraftforge.fml.common.network.NetworkRegistry.getRemoteGuiContainer(NetworkRegistry.java:251) ~[NetworkRegistry.class:?]
at net.minecraftforge.fml.common.network.internal.FMLNetworkHandler.openGui(FMLNetworkHandler.java:87) ~[FMLNetworkHandler.class:?]
at net.minecraft.entity.player.EntityPlayer.openGui(EntityPlayer.java:2723) ~[EntityPlayer.class:?]
at fdsatrew.network.handlers.PlayerInventoryPacketHandler$1.run(PlayerInventoryPacketHandler.java:27) ~[PlayerInventoryPacketHandler$1.class:?]
at java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source) ~[?:1.8.0_102]
at java.util.concurrent.FutureTask.run(Unknown Source) ~[?:1.8.0_102]
at net.minecraft.util.Util.runTask(Util.java:25) ~[util.class:?]
... 5 more

[spoiler=Gui Handler]

package fdsatrew;

import fdsatrew.capability.PlayerProvider;
import fdsatrew.player.gui.GuiCustomPlayerInventory;
import fdsatrew.player.inventory.ContainerCustomPlayer;
import net.minecraft.entity.player.EntityPlayer;
import net.minecraft.world.World;
import net.minecraftforge.fml.common.network.IGuiHandler;

public class GuiHandler implements IGuiHandler {

@Override
public Object getServerGuiElement(int guiId, EntityPlayer player, World world, int x, int y, int z) {
	if (player.hasCapability(PlayerProvider.PLAYER_CAPABILITY, null)) {
		if (guiId == Main.GUI_CUSTOM_INV) {
			return new ContainerCustomPlayer(player, player.inventory,
					player.getCapability(PlayerProvider.PLAYER_CAPABILITY, null).inventory);
		} else {
			return null;
		}
	}
	return null;
}

@Override
public Object getClientGuiElement(int guiId, EntityPlayer player, World world, int x, int y, int z) {
	if (player.hasCapability(PlayerProvider.PLAYER_CAPABILITY, null)) {
		if (guiId == Main.GUI_CUSTOM_INV) {
			return new GuiCustomPlayerInventory(player, player.inventory,
					player.getCapability(PlayerProvider.PLAYER_CAPABILITY, null).inventory);
		} else {
			return null;
		}
	}
	return null;
}
}

Animefan8888 · August 6, 2016

In your Container and GUi you require IPlayerCapability and it will auto cast to that to try and give it that.

fdsatrew · August 6, 2016

In your Container and GUi you require IPlayerCapability and it will auto cast to that to try and give it that.

What you mean? I use my capability now just for saving/loading slots in my inventory

[spoiler=Container]

public class ContainerCustomPlayer extends Container
{
/** Avoid magic numbers! This will greatly reduce the chance of you making errors in 'transferStackInSlot' method */
private static final int ARMOR_START = InventoryCustomPlayer.INV_SIZE, ARMOR_END = ARMOR_START+3,
		INV_START = ARMOR_END+1, INV_END = INV_START+26, HOTBAR_START = INV_END+1,
		HOTBAR_END = HOTBAR_START+8;

public ContainerCustomPlayer(EntityPlayer player, InventoryPlayer inventoryPlayer, InventoryCustomPlayer inventoryCustom)
{
	int i;

	// Add CUSTOM slots - we'll just add two for now, both of the same type.
	// Make a new Slot class for each different item type you want to add
	this.addSlotToContainer(new SlotCustom(inventoryCustom, 0, 80, );
	this.addSlotToContainer(new SlotCustom(inventoryCustom, 1, 80, 26));

	// Add ARMOR slots; note you need to make a public version of SlotArmor
	// just copy and paste the vanilla code into a new class and change what you need
	this.addSlotToContainer(new SlotArmor(player, inventoryPlayer, inventoryPlayer.getSizeInventory() - 1, 8, 8, EntityEquipmentSlot.HEAD));
	this.addSlotToContainer(new SlotArmor(player, inventoryPlayer, inventoryPlayer.getSizeInventory() - 2, 8, 26, EntityEquipmentSlot.CHEST));
	this.addSlotToContainer(new SlotArmor(player, inventoryPlayer, inventoryPlayer.getSizeInventory() - 3, 8, 44, EntityEquipmentSlot.LEGS));
	this.addSlotToContainer(new SlotArmor(player, inventoryPlayer, inventoryPlayer.getSizeInventory() - 4, 8, 62, EntityEquipmentSlot.FEET));
	// Add vanilla PLAYER INVENTORY - just copied/pasted from vanilla classes
	for (i = 0; i < 3; ++i)
	{
		for (int j = 0; j < 9; ++j)
		{
			this.addSlotToContainer(new Slot(inventoryPlayer, j + i * 9 + 9, 8 + j * 18, 84 + i * 18));
		}
	}

	// Add ACTION BAR - just copied/pasted from vanilla classes
	for (i = 0; i < 9; ++i)
	{
		this.addSlotToContainer(new Slot(inventoryPlayer, i, 8 + i * 18, 142));
	}
}

/**
 * This should always return true, since custom inventory can be accessed from anywhere
 */
@Override
public boolean canInteractWith(EntityPlayer player)
{
	return true;
}

int convertEntityEquipmentSlot(EntityEquipmentSlot es) {
	switch(es) {
	case HEAD:
		return 3;
	case CHEST:
		return 2;
	case LEGS:
		return 1;
	case FEET:
		return 0;
	default:
		return 0;
	}
}
/**
 * Called when a player shift-clicks on a slot. You must override this or you will crash when someone does that.
 * Basically the same as every other container I make, since I define the same constant indices for all of them 
 */
public ItemStack transferStackInSlot(EntityPlayer player, int par2)
{
	ItemStack itemstack = null;
	Slot slot = (Slot) this.inventorySlots.get(par2);

	if (slot != null && slot.getHasStack())
	{
		ItemStack itemstack1 = slot.getStack();
		itemstack = itemstack1.copy();

		// Either armor slot or custom item slot was clicked
		if (par2 < INV_START)
		{
			// try to place in player inventory / action bar
			if (!this.mergeItemStack(itemstack1, INV_START, HOTBAR_END + 1, true))
			{
				return null;
			}

			slot.onSlotChange(itemstack1, itemstack);
		}
		// Item is in inventory / hotbar, try to place either in custom or armor slots
		else
		{
			// if item is our custom item
			if (itemstack1.getItem() instanceof BaseItem)
			{
				if (!this.mergeItemStack(itemstack1, 0, InventoryCustomPlayer.INV_SIZE, false))
				{
					return null;
				}
			}
			// if item is armor
			else if (itemstack1.getItem() instanceof ItemArmor)
			{
				int type = convertEntityEquipmentSlot(((ItemArmor) itemstack1.getItem()).armorType);
				if (!this.mergeItemStack(itemstack1, ARMOR_START + type, ARMOR_START + type + 1, false))
				{
					return null;
				}
			}
			// item in player's inventory, but not in action bar
			else if (par2 >= INV_START && par2 < HOTBAR_START)
			{
				// place in action bar
				if (!this.mergeItemStack(itemstack1, HOTBAR_START, HOTBAR_START + 1, false))
				{
					return null;
				}
			}
			// item in action bar - place in player inventory
			else if (par2 >= HOTBAR_START && par2 < HOTBAR_END + 1)
			{
				if (!this.mergeItemStack(itemstack1, INV_START, INV_END + 1, false))
				{
					return null;
				}
			}
		}

		if (itemstack1.stackSize == 0)
		{
			slot.putStack((ItemStack) null);
		}
		else
		{
			slot.onSlotChanged();
		}

		if (itemstack1.stackSize == itemstack.stackSize)
		{
			return null;
		}

		slot.onPickupFromSlot(player, itemstack1);
	}

	return itemstack;
}
}

[spoiler=Gui]

public class GuiCustomPlayerInventory extends GuiContainer
{
/** x size of the inventory window in pixels. Defined as float, passed as int */
private float xSize_lo;

/** y size of the inventory window in pixels. Defined as float, passed as int. */
private float ySize_lo;

/** Normally I use '(ModInfo.MOD_ID, "textures/...")', but it can be done this way as well */
private static final ResourceLocation iconLocation = new ResourceLocation("tutorial:textures/gui/custom_inventory.png");

/** Could use IInventory type to be more generic, but this way will save an import... */
private final InventoryCustomPlayer inventory;
    /** The old x position of the mouse pointer */
    private float oldMouseX;
    /** The old y position of the mouse pointer */
    private float oldMouseY;
    public GuiCustomPlayerInventory(EntityPlayer player, InventoryPlayer inventoryPlayer, InventoryCustomPlayer inventoryCustom)
{
	super(new ContainerCustomPlayer(player, inventoryPlayer, inventoryCustom));
	this.inventory = inventoryCustom;
	// if you need the player for something later on, store it in a local variable here as well
}

    /**
     * Draw the foreground layer for the GuiContainer (everything in front of the items)
     */
    protected void drawGuiContainerForegroundLayer(int mouseX, int mouseY)
    {
        this.fontRendererObj.drawString(I18n.format("container.crafting", new Object[0]), 97, 8, 4210752);
    }

    /**
     * Draws the screen and all the components in it.
     */
    public void drawScreen(int mouseX, int mouseY, float partialTicks)
    {
        super.drawScreen(mouseX, mouseY, partialTicks);
        this.oldMouseX = (float)mouseX;
        this.oldMouseY = (float)mouseY;
    }

    /**
     * Draws the background layer of this container (behind the items).
     */
    protected void drawGuiContainerBackgroundLayer(float partialTicks, int mouseX, int mouseY)
    {
        GlStateManager.color(1.0F, 1.0F, 1.0F, 1.0F);
        this.mc.getTextureManager().bindTexture(INVENTORY_BACKGROUND);
        int i = this.guiLeft;
        int j = this.guiTop;
        this.drawTexturedModalRect(i, j, 0, 0, this.xSize, this.ySize);
        drawEntityOnScreen(i + 51, j + 75, 30, (float)(i + 51) - this.oldMouseX, (float)(j + 75 - 50) - this.oldMouseY, this.mc.thePlayer);
    }

    /**
     * Draws an entity on the screen looking toward the cursor.
     */
    public static void drawEntityOnScreen(int posX, int posY, int scale, float mouseX, float mouseY, EntityLivingBase ent)
    {
        GlStateManager.enableColorMaterial();
        GlStateManager.pushMatrix();
        GlStateManager.translate((float)posX, (float)posY, 50.0F);
        GlStateManager.scale((float)(-scale), (float)scale, (float)scale);
        GlStateManager.rotate(180.0F, 0.0F, 0.0F, 1.0F);
        float f = ent.renderYawOffset;
        float f1 = ent.rotationYaw;
        float f2 = ent.rotationPitch;
        float f3 = ent.prevRotationYawHead;
        float f4 = ent.rotationYawHead;
        GlStateManager.rotate(135.0F, 0.0F, 1.0F, 0.0F);
        RenderHelper.enableStandardItemLighting();
        GlStateManager.rotate(-135.0F, 0.0F, 1.0F, 0.0F);
        GlStateManager.rotate(-((float)Math.atan((double)(mouseY / 40.0F))) * 20.0F, 1.0F, 0.0F, 0.0F);
        ent.renderYawOffset = (float)Math.atan((double)(mouseX / 40.0F)) * 20.0F;
        ent.rotationYaw = (float)Math.atan((double)(mouseX / 40.0F)) * 40.0F;
        ent.rotationPitch = -((float)Math.atan((double)(mouseY / 40.0F))) * 20.0F;
        ent.rotationYawHead = ent.rotationYaw;
        ent.prevRotationYawHead = ent.rotationYaw;
        GlStateManager.translate(0.0F, 0.0F, 0.0F);
        RenderManager rendermanager = Minecraft.getMinecraft().getRenderManager();
        rendermanager.setPlayerViewY(180.0F);
        rendermanager.setRenderShadow(false);
        rendermanager.doRenderEntity(ent, 0.0D, 0.0D, 0.0D, 0.0F, 1.0F, false);
        rendermanager.setRenderShadow(true);
        ent.renderYawOffset = f;
        ent.rotationYaw = f1;
        ent.rotationPitch = f2;
        ent.prevRotationYawHead = f3;
        ent.rotationYawHead = f4;
        GlStateManager.popMatrix();
        RenderHelper.disableStandardItemLighting();
        GlStateManager.disableRescaleNormal();
        GlStateManager.setActiveTexture(OpenGlHelper.lightmapTexUnit);
        GlStateManager.disableTexture2D();
        GlStateManager.setActiveTexture(OpenGlHelper.defaultTexUnit);
    }
}

[spoiler=Inventory]


public class InventoryCustomPlayer implements IInventory
{
/** The name your custom inventory will display in the GUI, possibly just "Inventory" */
private final String name = "Custom Inventory";

/** The key used to store and retrieve the inventory from NBT */
private final String tagName = "CustomInvTag";

/** Define the inventory size here for easy reference */
// This is also the place to define which slot is which if you have different types,
// for example SLOT_SHIELD = 0, SLOT_AMULET = 1;
public static final int INV_SIZE = 2;

/** Inventory's size must be same as number of slots you add to the Container class */
private ItemStack[] inventory = new ItemStack[iNV_SIZE];

public InventoryCustomPlayer()
{
	// don't need anything here!
}

@Override
public int getSizeInventory()
{
	return inventory.length;
}

@Override
public ItemStack getStackInSlot(int slot)
{
	return inventory[slot];
}

@Override
public ItemStack decrStackSize(int slot, int amount)
{
	ItemStack stack = getStackInSlot(slot);
	if (stack != null)
	{
		if (stack.stackSize > amount)
		{
			stack = stack.splitStack(amount);
			this.markDirty();
		}
		else
		{
			setInventorySlotContents(slot, null);
		}
	}
	return stack;
}

@Override
public void setInventorySlotContents(int slot, ItemStack itemstack)
{
	if(slot < 0 || slot >= getSizeInventory()) return;
	this.inventory[slot] = itemstack;

	if (itemstack != null && itemstack.stackSize > this.getInventoryStackLimit())
	{
		itemstack.stackSize = this.getInventoryStackLimit();
	}

	this.markDirty();
}

/**
 * Our custom slots are similar to armor - only one item per slot
 */
@Override
public int getInventoryStackLimit()
{
	return 1;
}

@Override
public boolean isUseableByPlayer(EntityPlayer entityplayer)
{
	return true;
}

/**
 * This method doesn't seem to do what it claims to do, as
 * items can still be left-clicked and placed in the inventory
 * even when this returns false
 */
@Override
public boolean isItemValidForSlot(int slot, ItemStack itemstack)
{
	// If you have different kinds of slots, then check them here:
	// if (slot == SLOT_SHIELD && itemstack.getItem() instanceof ItemShield) return true;

	// For now, only ItemUseMana items can be stored in these slots
	return itemstack.getItem() instanceof BaseItem;
}

@Override
public String getName() {
	// TODO Auto-generated method stub
	return name;
}

@Override
public boolean hasCustomName() {
	// TODO Auto-generated method stub
	return name.length() > 0;	
}

@Override
public ITextComponent getDisplayName() {
        return (ITextComponent)(this.hasCustomName() ? new TextComponentString(this.getName()) : new TextComponentTranslation(this.getName(), new Object[0]));
}

@Override
public ItemStack removeStackFromSlot(int index)
    {
        if (inventory[index] != null)
        {
            ItemStack itemstack = inventory[index];
            inventory[index] = null;
            return itemstack;
        }
        else
        {
            return null;
        }
    }

@Override
public void markDirty() {
	for (int i = 0; i < getSizeInventory(); ++i)
	{
		if (getStackInSlot(i) != null && getStackInSlot(i).stackSize == 0) {
			inventory[i] = null;
		}
	}
}

@Override
public void openInventory(EntityPlayer player) {}

@Override
public void closeInventory(EntityPlayer player) {}


@Override
public int getField(int id) {
	return 0;
}

@Override
public void setField(int id, int value) {}

@Override
public int getFieldCount() {
	return 0;
}

@Override
public void clear() {
        for (int i = 0; i < getSizeInventory(); ++i)
        {
        	inventory[i] = null;
        }
}
}

P.S. Alot of code here are placeholder until i solve my error

Animefan8888 · August 6, 2016

What is PlayerProvider?

fdsatrew · August 6, 2016

What is PlayerProvider?

You can see PlayerProvider code at first post under "Capability code itself". I don't know how to name it correct because i see alot of threads here and in other forums when i learn capability system...

Animefan8888 · August 6, 2016

You are using IPlayerCapability in there.

fdsatrew · August 6, 2016

You are using IPlayerCapability in there.

And whats wrong with my interface?

https://github.com/MinecraftForge/MinecraftForge/blob/1.10.x/src/test/java/net/minecraftforge/test/NoBedSleepingTest.java

https://github.com/MinecraftForge/MinecraftForge/blob/1.9/src/test/java/net/minecraftforge/test/TestCapabilityMod.java

Do same thing...

Animefan8888 · August 6, 2016

In your GuiHandler do an instanceof check to see if the Capability you are getting is IPlayerCapability one.

fdsatrew · August 6, 2016

In your GuiHandler do an instanceof check to see if the Capability you are getting is IPlayerCapability one.

[11:15:45] [server thread/INFO] [sTDOUT]: [fdsatrew.GuiHandler:getServerGuiElement:18]: IPlayerCapability false

	@Override
public Object getServerGuiElement(int guiId, EntityPlayer player, World world, int x, int y, int z) {
	if (player.getCapability(PlayerProvider.PLAYER_CAPABILITY, null) instanceof IPlayerCapability) {
		System.out.println("IPlayerCapability true");
	} else {
		System.out.println("IPlayerCapability false");
	}
	if (player.hasCapability(PlayerProvider.PLAYER_CAPABILITY, null)) {
		if (guiId == Main.GUI_CUSTOM_INV) {
			return new ContainerCustomPlayer(player, player.inventory,
					player.getCapability(PlayerProvider.PLAYER_CAPABILITY, null).inventory);
		} else {
			return null;
		}
	}
	return null;
}

I think we found error, but how attach capability correct?

Animefan8888 · August 6, 2016

Here is the documentation on Capabilities provided by forge.

http://mcforge.readthedocs.io/en/latest/datastorage/capabilities/

Draco18s · August 6, 2016

Mainly

player.hasCapability(PlayerProvider.PLAYER_CAPABILITY, null)

So you don't have to do stupid isntanceof checks or null checks. If it does not have the capability, don't try to get it.

fdsatrew · August 6, 2016

Mainly
player.hasCapability(PlayerProvider.PLAYER_CAPABILITY, null)
So you don't have to do stupid isntanceof checks or null checks. If it does not have the capability, don't try to get it.

Ok. I change my code to next, but error keep same because nothing globally changes...

public class GuiHandler implements IGuiHandler {

@Override
public Object getServerGuiElement(int guiId, EntityPlayer player, World world, int x, int y, int z) {
	if (guiId == Main.GUI_CUSTOM_INV) {
		return new ContainerCustomPlayer(player, player.inventory,
				player.getCapability(PlayerProvider.PLAYER_CAPABILITY, null).inventory);
	} else {
		return null;
	}
}

@Override
public Object getClientGuiElement(int guiId, EntityPlayer player, World world, int x, int y, int z) {
	if (guiId == Main.GUI_CUSTOM_INV) {
		return new GuiCustomPlayerInventory(player, player.inventory,
				player.getCapability(PlayerProvider.PLAYER_CAPABILITY, null).inventory);
	} else {
		return null;
	}
}
}

Maybe error in my events? Docs says i need PlayerClone event too, but it's for saving capability data after player respawn...

	@SubscribeEvent
public void AttachCapability(AttachCapabilitiesEvent.Entity e) {
	if (!e.getEntity().hasCapability(PlayerProvider.PLAYER_CAPABILITY, null)
			&& e.getEntity() instanceof EntityPlayer) {
		e.addCapability(Capabilities.PLAYER_CAPABILITY_ID, new PlayerProvider());
	}
}

Here is the documentation on Capabilities provided by forge.

http://mcforge.readthedocs.io/en/latest/datastorage/capabilities/

I read this docs and i don't see any errors in my code.

Update:

I add debug message to my attachcapability event and it's works...

	@SubscribeEvent
public void AttachCapability(AttachCapabilitiesEvent.Entity e) {
	if (!e.getEntity().hasCapability(PlayerProvider.PLAYER_CAPABILITY, null)
			&& e.getEntity() instanceof EntityPlayer) {
		e.addCapability(Capabilities.PLAYER_CAPABILITY_ID, new PlayerProvider());
		System.out.println("Attach Capability");
	}
}

[21:38:46] [Client thread/INFO] [sTDOUT]: [fdsatrew.Main:AttachCapability:66]: Attach Capability

fdsatrew · August 7, 2016

There are still no solution :c

Animefan8888 · August 7, 2016

Does this ever get called?

public static void init() {
	CapabilityManager.INSTANCE.register(IPlayerCapability.class, PlayerCapability.PlayerStorage.playerStorage, PlayerCapability.class);
}

I didn't see anything like this in your code.

private static class Factory implements Callable<IExampleCapability> {

  @Override
  public IExampleCapability call() throws Exception {
    return new Implementation();
  }
}

fdsatrew · August 7, 2016

Does this ever get called?

public static void init() {
	CapabilityManager.INSTANCE.register(IPlayerCapability.class, PlayerCapability.PlayerStorage.playerStorage, PlayerCapability.class);
}

I didn't see anything like this in your code.

private static class Factory implements Callable<IExampleCapability> {

  @Override
  public IExampleCapability call() throws Exception {
    return new Implementation();
  }
}

It's called in CommonProxy because if remove this method body game crash with NPE. If i try to follow docs with creating and passing this class as argument to my capability registration i got compile error "The method register(Class<T>, Capability.IStorage<T>, Class<? extends T>) in the type CapabilityManager is not applicable for the arguments (Class<IPlayerCapability>, PlayerCapability.PlayerStorage, Class<PlayerFactory>)"

import java.util.concurrent.Callable;

import fdsatrew.capability.api.IPlayerCapability;

class PlayerFactory implements Callable<IPlayerCapability> {

@Override
public IPlayerCapability call() throws Exception {
	return new PlayerCapability();
}
}

If i change my "PlayerFactory" class body to

import java.util.concurrent.Callable;

import fdsatrew.capability.api.IPlayerCapability;

public class PlayerFactory implements Callable<IPlayerCapability>, IPlayerCapability {

@Override
public IPlayerCapability call() throws Exception {
	return new PlayerCapability();
}
}

Compile error are gone, but if i press my custom key same error appear

[spoiler=Error]

[17:12:27] [server thread/FATAL]: Error executing task
java.util.concurrent.ExecutionException: java.lang.ClassCastException: net.minecraftforge.common.capabilities.Capability cannot be cast to fdsatrew.capability.api.IPlayerCapability
at java.util.concurrent.FutureTask.report(Unknown Source) ~[?:1.8.0_102]
at java.util.concurrent.FutureTask.get(Unknown Source) ~[?:1.8.0_102]
at net.minecraft.util.Util.runTask(Util.java:26) [util.class:?]
at net.minecraft.server.MinecraftServer.updateTimeLightAndEntities(MinecraftServer.java:742) [MinecraftServer.class:?]
at net.minecraft.server.MinecraftServer.tick(MinecraftServer.java:687) [MinecraftServer.class:?]
at net.minecraft.server.integrated.IntegratedServer.tick(IntegratedServer.java:156) [integratedServer.class:?]
at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:536) [MinecraftServer.class:?]
at java.lang.Thread.run(Unknown Source) [?:1.8.0_102]
Caused by: java.lang.ClassCastException: net.minecraftforge.common.capabilities.Capability cannot be cast to fdsatrew.capability.api.IPlayerCapability
at fdsatrew.GuiHandler.getServerGuiElement(GuiHandler.java:16) ~[GuiHandler.class:?]
at net.minecraftforge.fml.common.network.NetworkRegistry.getRemoteGuiContainer(NetworkRegistry.java:251) ~[NetworkRegistry.class:?]
at net.minecraftforge.fml.common.network.internal.FMLNetworkHandler.openGui(FMLNetworkHandler.java:87) ~[FMLNetworkHandler.class:?]
at net.minecraft.entity.player.EntityPlayer.openGui(EntityPlayer.java:2723) ~[EntityPlayer.class:?]
at fdsatrew.network.handlers.PlayerInventoryPacketHandler$1.run(PlayerInventoryPacketHandler.java:27) ~[PlayerInventoryPacketHandler$1.class:?]
at java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source) ~[?:1.8.0_102]
at java.util.concurrent.FutureTask.run(Unknown Source) ~[?:1.8.0_102]
at net.minecraft.util.Util.runTask(Util.java:25) ~[util.class:?]
... 5 more

fdsatrew · August 7, 2016

CAN SOMEONE PLEASE GIVE WORKING CAPABILITY EXAMPLE ON 1.10.2?

Choonster · August 7, 2016

Forge itself has several capability examples, look at the usages of

CapabilityManager.register

in your IDE. There's also a test mod here.

I have some examples here: API, implementation

loordgek · August 7, 2016

CAN SOMEONE PLEASE GIVE WORKING CAPABILITY EXAMPLE ON 1.10.2?

plz dont do that. it is annoying

fdsatrew · August 8, 2016

Forge itself has several capability examples, look at the usages of
CapabilityManager.register
in your IDE. There's also a test mod here.

I have some examples here: API, implementation

Thanks you alot. Now my capability work without cast exception.

Solution: use implementation link as example.

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[1.10.2] Player.getCapability(...) problem

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