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--- block_modifying_blockentity [2023/06/18 09:43] – changed title terra
+++ tutorial:blockentity_modify_data [2023/06/18 13:24] – removed - external edit (Unknown date) 127.0.0.1
@@ Line 1: / Line 1: @@
-====== Modify BlockEntity data ======
-===== Introduction =====
-Having a ''BlockEntity'', which holds some data, connected to a ''Block'' is nice, but how to change the data?
-Before proceeding, you will need a [[tutorial:blocks|Block]] and a [[tutorial:blockentity|BlockEntity]], which should look similar to this:
-<code java>
-public class DemoBlockEntity extends BlockEntity {
-    public int number = 0;
-    public DemoBlockEntity(BlockPos pos, BlockState state) {
-        super(ExampleMod.DEMO_BLOCK_ENTITY, pos, state);
-    }
-    @Override
-    public void writeNbt(NbtCompound nbt) {
-        nbt.putInt("number", number);
-        super.writeNbt(nbt);
-    }
-    @Override
-    public void readNbt(NbtCompound nbt) {
-        super.readNbt(nbt);
-        number = nbt.getInt("number");
-    }
-}
-</code>
-Make sure the ''number'' field is **public**, as we are going to change it in the ''DemoBlock'' class. You could also make getter and setter methods.
-===== From Block's onUse() =====
-This gets the ''BlockEntity'' at the right-clicked Block's position and if it's of the type ''DemoBlockEntity'', increments its ''number'' field and sends a chat message to the player.
-<code java>
-public class DemoBlock extends Block implements BlockEntityProvider {
-    [...]
-    @Override
-    public ActionResult onUse(BlockState state, World world, BlockPos pos, PlayerEntity player, Hand hand, BlockHitResult hit) {
-        if (!world.isClient){
-            BlockEntity blockEntity = world.getBlockEntity(pos);
-            if (blockEntity instanceof DemoBlockEntity){
-                DemoBlockEntity demoBlockEntity = (DemoBlockEntity) blockEntity;
-                demoBlockEntity.number++;
-                player.sendMessage(Text.literal("Number is... "+demoBlockEntity.number), false);
-                return ActionResult.SUCCESS;
-            }
-        }
-        return ActionResult.PASS;
-    }
-}
-</code>