[Changes] Added new PlacementFilter for Biome IDs

src/main/java/org/betterx/bclib/api/v3/levelgen/features/placement/InBiome.java

@@ -0,0 +1,69 @@
+package org.betterx.bclib.api.v3.levelgen.features.placement;
+
+import com.mojang.serialization.Codec;
+import com.mojang.serialization.codecs.RecordCodecBuilder;
+import net.minecraft.core.BlockPos;
+import net.minecraft.core.Holder;
+import net.minecraft.resources.ResourceLocation;
+import net.minecraft.util.RandomSource;
+import net.minecraft.world.level.biome.Biome;
+import net.minecraft.world.level.levelgen.placement.PlacementContext;
+import net.minecraft.world.level.levelgen.placement.PlacementFilter;
+import net.minecraft.world.level.levelgen.placement.PlacementModifierType;
+
+import java.util.List;
+import java.util.Optional;
+
+public class InBiome extends PlacementFilter {
+    public static final Codec<InBiome> CODEC = RecordCodecBuilder.create((instance) -> instance
+            .group(
+                    Codec.BOOL
+                            .fieldOf("negate")
+                            .orElse(false)
+                            .forGetter(cfg -> cfg.negate),
+                    Codec.list(ResourceLocation.CODEC)
+                         .fieldOf("biomes")
+                         .forGetter(cfg -> cfg.biomeIDs)
+            )
+            .apply(instance, InBiome::new));
+
+    public final List<ResourceLocation> biomeIDs;
+    public final boolean negate;
+
+    protected InBiome(boolean negate, List<ResourceLocation> biomeIDs) {
+        this.biomeIDs = biomeIDs;
+        this.negate = negate;
+    }
+
+    public static InBiome matchingID(ResourceLocation... id) {
+        return new InBiome(false, List.of(id));
+    }
+
+    public static InBiome matchingID(List<ResourceLocation> ids) {
+        return new InBiome(false, ids);
+    }
+
+    public static InBiome notMatchingID(ResourceLocation... id) {
+        return new InBiome(true, List.of(id));
+    }
+
+    public static InBiome notMatchingID(List<ResourceLocation> ids) {
+        return new InBiome(true, ids);
+    }
+
+    @Override
+    protected boolean shouldPlace(PlacementContext ctx, RandomSource random, BlockPos pos) {
+        Holder<Biome> holder = ctx.getLevel().getBiome(pos);
+        Optional<ResourceLocation> biomeLocation = holder.unwrapKey().map(key -> key.location());
+        if (biomeLocation.isPresent()) {
+            boolean contains = biomeIDs.contains(biomeLocation.get());
+            return negate != contains;
+        }
+        return false;
+    }
+
+    @Override
+    public PlacementModifierType<InBiome> type() {
+        return PlacementModifiers.IN_BIOME;
+    }
+}

src/main/java/org/betterx/bclib/api/v3/levelgen/features/placement/PlacementModifiers.java

@@ -71,6 +71,11 @@ public class PlacementModifiers {
             UnderEveryLayer.CODEC
     );
 
+    public static final PlacementModifierType<InBiome> IN_BIOME = register(
+            "in_biome",
+            InBiome.CODEC
+    );
+
 
     private static <P extends PlacementModifier> PlacementModifierType<P> register(String path, Codec<P> codec) {
         return register(BCLib.makeID(path), codec);