Simontange

No I don't know how to do this and why do this, it is to make some packages ? It is the line where I get the Nen value lenthBar = (int)(tmp*nen.getNen()); I watched like 3-4 tutorials on internet and moste of time they made an interface but the last guy don't made one and it works fine Now your saying it I d'ont find the methode read and write for the NBTTag I will restart my classes i think I register it in the CommonProxy in the PreInit it is good or not ?

Hello i am a new moddeur and i am doing a mod based on Hxh so i would like to attach to the players a quantity of Nen (mana) and a max amount of Nen. So I used the system of capabilities I followed many tutorials to do it but every time I have a error null point exeption so I come here to ask your help, thank you in advance and sorry for my bad English . here my crash report : crash-2019-03-30_00.16.20-client.txt my classes : public class PlayerNen { private double Nen = 0.0; public PlayerNen() { } public double getNen() { return Nen; } public void setNen(double nen) { Nen = nen; } public void copyNen(PlayerNen Pnen) { Nen = Pnen.Nen; } public void saveNBTData (NBTTagCompound compound) {compound.setDouble("nen",Nen);} public void loadNBTData (NBTTagCompound compound){Nen=compound.getDouble("nen");} } public class PlayerProp { @CapabilityInject(PlayerNen.class) public static Capability<PlayerNen> Player_Nen; public static PlayerNen getPlayerNen(EntityPlayer player){ return player.getCapability(Player_Nen,null);} public class PropDispatcher implements ICapabilitySerializable<NBTTagCompound> { private PlayerNen playerNen = new PlayerNen(); @Override public boolean hasCapability(@Nonnull Capability<?> capability, @Nullable EnumFacing facing) { return capability == PlayerProp.Player_Nen; } @Nullable @Override public <T> T getCapability(@Nonnull Capability<T> capability, @Nullable EnumFacing facing) { if (capability == PlayerProp.Player_Nen){ return (T) playerNen; } return null; } @Override public NBTTagCompound serializeNBT() { NBTTagCompound nbt = new NBTTagCompound(); playerNen.saveNBTData(nbt); return nbt; } @Override public void deserializeNBT(NBTTagCompound nbt) { playerNen.loadNBTData(nbt); } } public class PlayerPropEvent { public static PlayerPropEvent instance = new PlayerPropEvent(); @SubscribeEvent public void onEntityContstructing (AttachCapabilitiesEvent<net.minecraft.entity.Entity> event){ Entity test = (net.minecraft.entity.Entity) event.getObject(); if (test instanceof EntityPlayer){ if (!event.getObject().hasCapability(PlayerProp.Player_Nen,null)){ event.addCapability(new ResourceLocation(MainHunterXHunter.modId,"nen"),new PropDispatcher()); } } } @SubscribeEvent public void onPlayerCloned(PlayerEvent.Clone event){ if(event.isWasDeath()){ if(event.getOriginal().hasCapability(PlayerProp.Player_Nen,null)){ PlayerNen old = event.getOriginal().getCapability(PlayerProp.Player_Nen,null); PlayerNen newstore = PlayerProp.getPlayerNen(event.getEntityPlayer()); newstore.copyNen(old); } } } } And here the class to setup a Nen bar, this works fine whithout capabilities public class NenOverlay extends Gui { private final ResourceLocation bar = new ResourceLocation(MainHunterXHunter.modId, "textures/barre.png"); @SubscribeEvent public void renderOverlay (RenderGameOverlayEvent event ){ Minecraft mc = Minecraft.getMinecraft(); EntityPlayer player = mc.player ; PlayerNen nen = PlayerProp.getPlayerNen(player); final int externalBarH = 20, externalBarL = 108, internalBarH = 14, internalBarL = 102; float tmp=0; int lenthBar =0; if (event.getType()==RenderGameOverlayEvent.ElementType.TEXT){ mc.renderEngine.bindTexture(bar); tmp = internalBarL/250; lenthBar = (int)(tmp*nen.getNen()); drawTexturedModalRect(5,5,0,0,externalBarL,externalBarH); drawTexturedModalRect(8,8,3,20,lenthBar,internalBarH); } } } Thank you for reading this.