feat: add Fleshy Membrane block

src/datagen/java/com/github/elenterius/biomancy/datagen/lang/EnglishLangProvider.java

@@ -480,6 +480,7 @@ private void addBlockTranslations() {
 		addBlock(ModBlocks.BLUE_BIO_LANTERN, "Blue Bio-Lantern", "A bioluminescent light source. This one is blue!");
 		addBlock(ModBlocks.TENDON_CHAIN, "Tendon Chain", "A chain made of tendons.");
 		addBlock(ModBlocks.VIAL_HOLDER, "Vial Holder", "Display and organize your serums.");
+		addBlock(ModBlocks.FLESH_MEMBRANE, "Fleshy Membrane", "Window made of gelatinous-like membrane reinforced with elastic fibers.\n\nBaby mobs diffuse through the membrane.");
 
 		addBlock(ModBlocks.PRIMAL_FLESH, "Primal Flesh Block", "Primitive and pure, you better not touch this with your dirty mitts.");
 		addBlock(ModBlocks.PRIMAL_FLESH_SLAB, "Primal Flesh Slab", "Primitive and pure, you better not touch this with your dirty mitts.");

src/datagen/java/com/github/elenterius/biomancy/datagen/loot/ModBlockLoot.java

@@ -156,6 +156,7 @@ protected void addTables() {
 		add(ModBlocks.MALIGNANT_FLESH_VEINS.get(), block -> createMultifaceBlockDrops(block, HAS_SHEARS_OR_SILK_TOUCH));
 
 		dropSelf(ModBlocks.VOICE_BOX.get());
+		dropSelf(ModBlocks.FLESH_MEMBRANE.get());
 		dropSelf(ModBlocks.FLESH_IRIS_DOOR.get());
 		dropSelf(ModBlocks.FLESH_FENCE.get());
 		dropSelf(ModBlocks.FLESH_FENCE_GATE.get());

src/datagen/java/com/github/elenterius/biomancy/datagen/models/ModBlockStateProvider.java

@@ -91,6 +91,7 @@ protected void registerStatesAndModels() {
 		irisDoor(ModBlocks.FLESH_IRIS_DOOR, true);
 		fleshDoor(ModBlocks.FLESH_DOOR);
 		fleshSpikes(ModBlocks.FLESH_SPIKE);
+		translucentBlockWithItem(ModBlocks.FLESH_MEMBRANE);
 		bioLantern(ModBlocks.YELLOW_BIO_LANTERN);
 		bioLantern(ModBlocks.BLUE_BIO_LANTERN);
 		tendonChain(ModBlocks.TENDON_CHAIN);

src/datagen/java/com/github/elenterius/biomancy/datagen/recipes/ModRecipeProvider.java

@@ -895,6 +895,13 @@ private void registerBioForgeRecipes(Consumer<FinishedRecipe> consumer) {
 				.setCategory(ModBioForgeTabs.BLOCKS)
 				.unlockedBy(ModItems.BONE_FRAGMENTS.get()).save(consumer);
 
+		BioForgeRecipeBuilder.create(ModItems.FLESH_MEMBRANE.get())
+				.addIngredient(ModItems.ELASTIC_FIBERS.get(), 2)
+				.addIngredient(ModItems.BILE.get(), 4)
+				.addIngredient(ModItems.GEM_FRAGMENTS.get(), 1)
+				.setCategory(ModBioForgeTabs.MISC)
+				.unlockedBy(ModItems.ELASTIC_FIBERS.get()).save(consumer);
+
 		BioForgeRecipeBuilder.create(ModItems.FLESH_FENCE.get(), 4)
 				.addIngredient(ModItems.FLESH_BITS.get(), fleshBlockCost)
 				.addIngredient(ModItems.BONE_FRAGMENTS.get(), 2)

src/datagen/java/com/github/elenterius/biomancy/datagen/tags/ModBlockTagsProvider.java

@@ -59,6 +59,8 @@ protected void addTags() {
 				ModBlocks.PRIMAL_FLESH_SLAB.get(),
 				ModBlocks.MALIGNANT_FLESH_SLAB.get()
 		);
+
+		tag(BlockTags.IMPERMEABLE).add(ModBlocks.FLESH_MEMBRANE.get());
 	}
 
 	private void addFleshyBlocksToHoeTag() {

src/main/java/com/github/elenterius/biomancy/block/MembraneBlock.java

@@ -0,0 +1,70 @@
+package com.github.elenterius.biomancy.block;
+
+import net.minecraft.core.BlockPos;
+import net.minecraft.world.entity.Entity;
+import net.minecraft.world.entity.LivingEntity;
+import net.minecraft.world.entity.Mob;
+import net.minecraft.world.entity.item.ItemEntity;
+import net.minecraft.world.level.BlockGetter;
+import net.minecraft.world.level.block.HalfTransparentBlock;
+import net.minecraft.world.level.block.state.BlockBehaviour;
+import net.minecraft.world.level.block.state.BlockState;
+import net.minecraft.world.level.pathfinder.BlockPathTypes;
+import net.minecraft.world.phys.shapes.CollisionContext;
+import net.minecraft.world.phys.shapes.EntityCollisionContext;
+import net.minecraft.world.phys.shapes.Shapes;
+import net.minecraft.world.phys.shapes.VoxelShape;
+import org.jetbrains.annotations.Nullable;
+
+public class MembraneBlock extends HalfTransparentBlock {
+
+	protected final IgnoreEntityCollisionPredicate ignoreEntityCollisionPredicate;
+
+	public MembraneBlock(BlockBehaviour.Properties properties, IgnoreEntityCollisionPredicate predicate) {
+		super(properties);
+		ignoreEntityCollisionPredicate = predicate;
+	}
+
+	public VoxelShape getVisualShape(BlockState state, BlockGetter level, BlockPos pos, CollisionContext context) {
+		return Shapes.empty();
+	}
+
+	public float getShadeBrightness(BlockState state, BlockGetter level, BlockPos pos) {
+		return 1f;
+	}
+
+	public boolean propagatesSkylightDown(BlockState state, BlockGetter level, BlockPos pos) {
+		return true;
+	}
+
+	@Override
+	public VoxelShape getCollisionShape(BlockState state, BlockGetter level, BlockPos pos, CollisionContext context) {
+		if (context instanceof EntityCollisionContext entityContext && ignoreEntityCollisionPredicate.test(state, level, pos, entityContext.getEntity())) {
+			return Shapes.empty();
+		}
+		return state.getShape(level, pos);
+	}
+
+	/**
+	 * WARNING: broken Forge API
+	 * <p>
+	 * Gets the path type of this block when an entity is pathfinding. When
+	 * {@code null}, uses vanilla behavior.
+	 *
+	 * @param mob is always null
+	 * @see <a href="https://github.com/MinecraftForge/MinecraftForge/issues/9283">Forge Issue 9283</a>
+	 */
+	@Override
+	public @Nullable BlockPathTypes getBlockPathType(BlockState state, BlockGetter level, BlockPos pos, @Nullable Mob mob) {
+		//		if (ignoreEntityCollisionPredicate.test(state, level, pos, mob)) return BlockPathTypes.DOOR_OPEN; //doesn't work due to broken Forge API
+		return BlockPathTypes.STICKY_HONEY;
+	}
+
+	public interface IgnoreEntityCollisionPredicate {
+		IgnoreEntityCollisionPredicate IS_BABY_MOB = (state, level, pos, entity) -> entity instanceof LivingEntity livingEntity && livingEntity.isBaby();
+		IgnoreEntityCollisionPredicate IS_ADULT_MOB = (state, level, pos, entity) -> entity instanceof LivingEntity livingEntity && !livingEntity.isBaby();
+		IgnoreEntityCollisionPredicate IS_ITEM = (state, level, pos, entity) -> entity instanceof ItemEntity;
+
+		boolean test(BlockState state, BlockGetter level, BlockPos pos, @Nullable Entity entity);
+	}
+}

src/main/java/com/github/elenterius/biomancy/init/ModBlocks.java

@@ -105,6 +105,10 @@ public final class ModBlocks {
 
 	//## Misc
 	public static final RegistryObject<VoiceBoxBlock> VOICE_BOX = register("voice_box", VoiceBoxBlock::new);
+	public static final RegistryObject<MembraneBlock> FLESH_MEMBRANE = register("flesh_membrane", props -> {
+		props = props.noOcclusion().isRedstoneConductor(ModBlocks::neverValid).isSuffocating(ModBlocks::neverValid).isViewBlocking(ModBlocks::neverValid);
+		return new MembraneBlock(props, MembraneBlock.IgnoreEntityCollisionPredicate.IS_BABY_MOB);
+	});
 	public static final RegistryObject<LadderBlock> FLESH_LADDER = register("flesh_ladder", () -> new LadderBlock(createFleshyBoneProperties().noOcclusion()));
 	public static final RegistryObject<FleshFenceBlock> FLESH_FENCE = register("flesh_fence", FleshFenceBlock::new);
 	public static final RegistryObject<FleshFenceGateBlock> FLESH_FENCE_GATE = register("flesh_fence_gate", () -> new FleshFenceGateBlock(createFleshyBoneProperties().noOcclusion()));
@@ -171,6 +175,15 @@ public static boolean isValidFleshkinSpawn(BlockState state, BlockGetter level,
 		return entityType.is(ModEntityTags.FLESHKIN) && state.isFaceSturdy(level, pos, Direction.UP);
 	}
 
+	public static boolean neverValid(BlockState state, BlockGetter level, BlockPos pos, EntityType<?> entityType) {
+		return false;
+	}
+
+	public static boolean neverValid(BlockState state, BlockGetter level, BlockPos pos) {
+		return false;
+	}
+
+
 	interface StairBlockFactory<T extends StairBlock> {
 		T create(Supplier<BlockState> state, BlockBehaviour.Properties properties);
 	}

src/main/java/com/github/elenterius/biomancy/init/ModItems.java

@@ -152,6 +152,7 @@ public final class ModItems {
 
 	//## Misc
 	public static final RegistryObject<SimpleBlockItem> VOICE_BOX = registerSimpleBlockItem(ModBlocks.VOICE_BOX, () -> createProperties().tab(null));
+	public static final RegistryObject<SimpleBlockItem> FLESH_MEMBRANE = registerSimpleBlockItem(ModBlocks.FLESH_MEMBRANE);
 	public static final RegistryObject<SimpleBlockItem> FLESH_LADDER = registerSimpleBlockItem(ModBlocks.FLESH_LADDER);
 	public static final RegistryObject<SimpleBlockItem> FLESH_FENCE = registerSimpleBlockItem(ModBlocks.FLESH_FENCE);
 	public static final RegistryObject<SimpleBlockItem> FLESH_FENCE_GATE = registerSimpleBlockItem(ModBlocks.FLESH_FENCE_GATE);