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--- tutorial:transfer-api_simpletank [2021/10/29 20:46] – created technici4n
+++ tutorial:transfer-api_simpletank [2022/10/07 16:55] – nexus-dino
@@ Line 1: / Line 1: @@
 ===== Fabric Transfer API: Creating a simple tank =====
 //This article is part of a series on the Fabric Transfer API. [[tutorial:transfer-api|Link to the home page of the series]].//
+=== But wait, what is a FluidVariant ? ===
+A ''FluidVariant'' is what the Transfer API uses to represent the "type" of a fluid. It contains the ''Fluid'' in the minecraft sense, and also an optional NBT compound tag:
+<code java>
+// Creating a fluid variant from a fluid, without an NBT tag.
+FluidVariant waterVariant = FluidVariant.of(Fluids.WATER);
+waterVariant.getFluid() // returns Fluids.WATER
+waterVariant.copyNbt() // returns a copy of the optional nbt tag, in this case null
+// Creating a fluid variant from a fluid, with an NBT tag.
+NbtCompound customTag = new NbtCompound();
+customTag.putBoolean("magic", true);
+FluidVariant magicWater = FluidVariant.of(Fluids.WATER, customTag);
+</code>
+Variants are always compared with ''.equals'', NEVER WITH ''=='' !
+<code java>
+waterVariant.equals(waterVariant); // returns true
+waterVariant.equals(magicWater); // returns false
+// You can easily test if a variant has some fluid:
+waterVariant.isOf(Fluids.WATER); // returns true
+magicWater.isOf(Fluids.WATER); // returns true
+</code>
+They can easily be serialized to and from NBT or network packets:
+<code java>
+// NBT
+NbtCompound compound = variant.toNbt();
+FluidVariant variant = FluidVariant.fromNbt(compound);
+// Network packets
+variant.toPacket(buf);
+FluidVariant variant = FluidVariant.fromPacket(buf);
+</code>
+CAUTION: make sure that you know the base understanding of [[tutorial:blockentity|making a block entity]] and [[tutorial:inventory|creating block entity inventories]] before continuing to read.
 Let's see how we can make a block entity contain some fluid:
 <code java>
-public class MyTankBlockEntity extends BlockEntity {
+// Make sure you implement ExtendedScreenHandlerFactory because we need to write the pos of this entity...
+public class MyTankBlockEntity extends BlockEntity implements ExtendedScreenHandlerFactory, ImplementedInventory {
+        private final DefaultedList<ItemStack> inventory = DefaultedList.ofSize(3, ItemStack.EMPTY);
 	// This field is going to contain the amount, and the fluid variant (more on that in a bit).
 	public final SingleVariantStorage<FluidVariant> fluidStorage = new SingleVariantStorage<>() {
@@ Line 16: / Line 53: @@
 			// Here, you can pick your capacity depending on the fluid variant.
 			// For example, if we want to store 8 buckets of any fluid:
-			return 8 * FluidConstants.BUCKET;
+			return (8 * FluidConstants.BUCKET) / 81 // This will convert it to mB amount to be consistent;
 		}
@@ Line 23: / Line 60: @@
 			// Called after a successful insertion or extraction, markDirty to ensure the new amount and variant will be saved properly.
 			markDirty();
+                        if (!world.isClient) {
+                           var buf = PacketByteBufs.create();
+                           // Write your data here.
+                           PlayerLookup.tracking(MyTankBlockEntity.this).forEach(player -> {
+                               ServerPlayNetworking.send(player, YOUR_IDENTIFIER, buf);
+                           });
+                        }
 		}
 	};
@@ Line 48: / Line 92: @@
 // Put this in your mod initializer, after you have created the block entity type:
 FluidStorage.SIDED.registerForBlockEntity((myTank, direction) -> myTank.fluidStorage, MY_TANK);
-</code>
-=== But wait, what is a FluidVariant ? ===
-A ''FluidVariant'' is what the Transfer API uses to represent the "type" of a fluid. It contains the ''Fluid'' in the minecraft sense, and also an optional NBT compound tag:
-<code java>
-// Creating a fluid variant from a fluid, without an NBT tag.
-FluidVariant waterVariant = FluidVariant.of(Fluids.WATER);
-waterVariant.getFluid() // returns Fluids.WATER
-waterVariant.copyNbt() // returns a copy of the optional nbt tag, in this case null
-// Creating a fluid variant from a fluid, with an NBT tag.
-NbtCompound customTag = new NbtCompound();
-customTag.putBoolean("magic", true);
-FluidVariant magicWater = FluidVariant.of(Fluids.WATER, customTag);
-</code>
-Variants are always compared with ''.equals'', NEVER WITH ''=='' !
-<code java>
-waterVariant.equals(waterVariant); // returns true
-waterVariant.equals(magicWater); // returns false
-// You can easily test if a variant has some fluid:
-waterVariant.isOf(Fluids.WATER); // returns true
-magicWater.isOf(Fluids.WATER); // returns true
-</code>
-They can easily be serialized to and from NBT or network packets:
-<code java>
-// NBT
-NbtCompound compound = variant.toNbt();
-FluidVariant variant = FluidVariant.fromNbt(compound);
-// Network packets
-variant.toPacket(buf);
-FluidVariant variant = FluidVariant.fromPacket(buf);
 </code>