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--- tutorial:fluids [2019/09/24 10:46] – fluid implementation alexiy
+++ tutorial:fluids [2019/09/24 14:52] – how to add fluids to tags alexiy
@@ Line 100: / Line 100: @@
     public abstract boolean matchesType(Fluid fluid_1);
-    /**
-     * Required for entities to behave in this fluid like in water
-     */
-    @Override
-    public boolean matches(Tag<Fluid> tag_1)
-    {
-        return tag_1 == FluidTags.WATER;
-    }
 }
 </code>
@@ Line 215: / Line 207: @@
         Registry.register(Registry.ITEM,new Identifier(MODID,"acid_bucket"),acidBucket);
     }
+</code>
+To make the custom fluid behave like water or lava, you must add it to a corresponding fluid tag: make a file "data/minecraft/tags/fluids/water.json" and write identifiers of your fluids in there:
+<code json>
+{
+  "replace": false,
+  "values": [
+    "modid:acid_still",
+    "modid:acid_flowing"
+  ]
+}
 </code>
@@ Line 290: / Line 293: @@
 Now we can assert that the Acid class is complete.
+===== Rendering setup =====
+Time to do client-side things. In your **ClientModInitializer** you need to specify locations of sprites for your fluids and define their rendering. I will reuse water textures and just change the color applied to them.
+<code java>
+    @Override
+    public void onInitializeClient()
+    {
+        Identifier stillSpriteLocation=new Identifier("block/water_still");
+        Identifier dynamicSpriteLocation=new Identifier("block/water_flow");
+        // here I tell to use only 16x16 area of the water texture
+        FabricSprite stillAcidSprite = new FabricSprite(stillSpriteLocation,16,16);
+        // same, but 32
+        FabricSprite dynamicAcidSprite=new FabricSprite(dynamicSpriteLocation,32,32);
+        // adding the sprites to the block texture atlas
+        ClientSpriteRegistryCallback.event(SpriteAtlasTexture.BLOCK_ATLAS_TEX).register((spriteAtlasTexture, registry) -> {
+            registry.register(stillAcidSprite);
+            registry.register(dynamicAcidSprite);
+        });
+        // this renderer is responsible for drawing fluids in a world
+        FluidRenderHandler acidRenderHandler=new FluidRenderHandler()
+        {
+            // return the sprites: still sprite goes first into the array, flowing/dynamic goes last
+            @Override
+            public Sprite[] getFluidSprites(ExtendedBlockView extendedBlockView, BlockPos blockPos, FluidState fluidState)
+            {
+                return new Sprite[]{stillAcidSprite,dynamicAcidSprite};
+            }
+            // apply light green color
+            @Override
+            public int getFluidColor(ExtendedBlockView view, BlockPos pos, FluidState state)
+            {
+                return 0x4cc248;
+            }
+        };
+        // registering the same renderer for both fluid variants is intentional
+        FluidRenderHandlerRegistry.INSTANCE.register([ModInitializer].stillAcid,acidRenderHandler);
+        FluidRenderHandlerRegistry.INSTANCE.register([ModInitializer].flowingAcid,acidRenderHandler);
+</code>
+Then what's left to do is to create necessary Json files and textures, but you should know how to do that at this point.
+===== Generation in a world =====
+To make acid lakes generate in the world, you can use **net.minecraft.world.gen.feature.LakeFeature**, which you create in the ModInitializer:
+<code java>
+        LakeFeature acidFeature=Registry.register(Registry.FEATURE,new Identifier(MODID,"acid_lake"),new LakeFeature(dynamic -> new LakeFeatureConfig(acid.getDefaultState())));
+</code>
+Then put it into desired biomes to generate:
+<code java>
+        // I tell it to generate like water lakes, with a rarity of 40 (the higher is the number, the lesser is the generation chance):
+        Biomes.FOREST.addFeature(GenerationStep.Feature.LOCAL_MODIFICATIONS, Biome.configureFeature(acidFeature,new LakeFeatureConfig(acid.getDefaultState()), Decorator.WATER_LAKE,new LakeDecoratorConfig(40)));
+</code>
+This is the end of the tutorial.