From ae6c0e9aac3097b4e12b2479acb67421626332c3 Mon Sep 17 00:00:00 2001
From: paulevsGitch <paulevs@yandex.ru>
Date: Fri, 3 Dec 2021 20:10:15 +0300
Subject: [PATCH] Surface builder for two blocks

---
 src/main/java/ru/bclib/BCLib.java              | 17 ++++++++++++-----
 .../ru/bclib/api/biomes/BCLBiomeBuilder.java   | 18 ++++++++++++++++++
 2 files changed, 30 insertions(+), 5 deletions(-)

diff --git a/src/main/java/ru/bclib/BCLib.java b/src/main/java/ru/bclib/BCLib.java
index 4478b912..5066dcd2 100644
--- a/src/main/java/ru/bclib/BCLib.java
+++ b/src/main/java/ru/bclib/BCLib.java
@@ -4,6 +4,8 @@ import net.fabricmc.api.EnvType;
 import net.fabricmc.api.ModInitializer;
 import net.fabricmc.loader.api.FabricLoader;
 import net.minecraft.resources.ResourceLocation;
+import net.minecraft.world.level.levelgen.Noises;
+import net.minecraft.world.level.levelgen.SurfaceRules;
 import ru.bclib.api.TagAPI;
 import ru.bclib.api.WorldDataAPI;
 import ru.bclib.api.dataexchange.DataExchangeAPI;
@@ -40,11 +42,11 @@ public class BCLib implements ModInitializer {
 		DataExchangeAPI.registerMod(MOD_ID);
 		
 		DataExchangeAPI.registerDescriptors(List.of(
-				HelloClient.DESCRIPTOR,
-				HelloServer.DESCRIPTOR,
-				RequestFiles.DESCRIPTOR,
-				SendFiles.DESCRIPTOR,
-				Chunker.DESCRIPTOR
+			HelloClient.DESCRIPTOR,
+			HelloServer.DESCRIPTOR,
+			RequestFiles.DESCRIPTOR,
+			SendFiles.DESCRIPTOR,
+			Chunker.DESCRIPTOR
 		));
 		
 		BCLibPatch.register();
@@ -62,4 +64,9 @@ public class BCLib implements ModInitializer {
 	public static ResourceLocation makeID(String path) {
 		return new ResourceLocation(MOD_ID, path);
 	}
+	
+	private static SurfaceRules.ConditionSource surfaceNoiseAbove(double d) {
+		
+		return SurfaceRules.noiseCondition(Noises.SURFACE, d / 8.25, Double.MAX_VALUE);
+	}
 }
diff --git a/src/main/java/ru/bclib/api/biomes/BCLBiomeBuilder.java b/src/main/java/ru/bclib/api/biomes/BCLBiomeBuilder.java
index 2299d185..d0a28865 100644
--- a/src/main/java/ru/bclib/api/biomes/BCLBiomeBuilder.java
+++ b/src/main/java/ru/bclib/api/biomes/BCLBiomeBuilder.java
@@ -24,9 +24,11 @@ import net.minecraft.world.level.biome.MobSpawnSettings.SpawnerData;
 import net.minecraft.world.level.block.Block;
 import net.minecraft.world.level.levelgen.GenerationStep;
 import net.minecraft.world.level.levelgen.GenerationStep.Decoration;
+import net.minecraft.world.level.levelgen.Noises;
 import net.minecraft.world.level.levelgen.SurfaceRules;
 import net.minecraft.world.level.levelgen.carver.ConfiguredWorldCarver;
 import net.minecraft.world.level.levelgen.feature.ConfiguredStructureFeature;
+import net.minecraft.world.level.levelgen.placement.CaveSurface;
 import net.minecraft.world.level.levelgen.placement.PlacedFeature;
 import ru.bclib.util.ColorUtil;
 import ru.bclib.world.biomes.BCLBiome;
@@ -40,6 +42,7 @@ import java.util.function.Consumer;
 
 public class BCLBiomeBuilder {
 	private static final BCLBiomeBuilder INSTANCE = new BCLBiomeBuilder();
+	private static final SurfaceRules.ConditionSource SURFACE_NOISE = SurfaceRules.noiseCondition(Noises.SOUL_SAND_LAYER, -0.012);
 	
 	private List<ConfiguredStructureFeature> structures = new ArrayList<>(16);
 	private BiomeGenerationSettings.Builder generationSettings;
@@ -494,6 +497,21 @@ public class BCLBiomeBuilder {
 		return surface(SurfaceRules.ifTrue(SurfaceRules.ON_FLOOR, SurfaceRules.state(surfaceBlock.defaultBlockState())));
 	}
 	
+	/**
+	 * Adds blocks to the biome surface and below it (with specified depth).
+	 * @param surfaceBlock {@link Block} that will cover biome.
+	 * @param subterrainBlock {@link Block} below it with specified depth.
+	 * @param depth thickness of bottom block layer.
+	 * @return same {@link BCLBiomeBuilder} instance.
+	 */
+	public BCLBiomeBuilder surface(Block surfaceBlock, Block subterrainBlock, int depth) {
+		SurfaceRules.RuleSource topRule = SurfaceRules.state(surfaceBlock.defaultBlockState());
+		SurfaceRules.RuleSource subterrainRule = SurfaceRules.state(subterrainBlock.defaultBlockState());
+		topRule = SurfaceRules.ifTrue(SurfaceRules.ON_FLOOR, topRule);
+		subterrainRule = SurfaceRules.ifTrue(SurfaceRules.stoneDepthCheck(depth, false, false, CaveSurface.FLOOR), subterrainRule);
+		return surface(SurfaceRules.sequence(topRule, subterrainRule));
+	}
+	
 	/**
 	 * Adds surface rule to this biome.
 	 * @param surfaceRule {link SurfaceRules.RuleSource} surface rule.