added foundation for basic ore generation

Signed-off-by: Zelophed <zefren1@googlemail.com>

src/main/java/com/simibubi/create/Create.java

@@ -1,5 +1,6 @@
 package com.simibubi.create;
 
+import com.simibubi.create.foundation.world.OreGeneration;
 import org.apache.logging.log4j.LogManager;
 import org.apache.logging.log4j.Logger;
 
@@ -51,6 +52,7 @@ public class Create {
 	public Create() {
 		IEventBus modEventBus = FMLJavaModLoadingContext.get().getModEventBus();
 		modEventBus.addListener(Create::init);
+		modEventBus.addListener(Create::preInit);
 		modEventBus.addGenericListener(Block.class, Create::registerBlocks);
 		modEventBus.addGenericListener(Item.class, Create::registerItems);
 		modEventBus.addGenericListener(IRecipeSerializer.class, Create::registerRecipes);
@@ -66,6 +68,12 @@ public class Create {
 		ModLoadingContext.get().registerConfig(ModConfig.Type.CLIENT, CreateClientConfig.specification);
 	}
 
+	public static void preInit(FMLCommonSetupEvent event) {
+
+		OreGeneration.setupOreGeneration();
+
+	}
+
 	public static void init(final FMLCommonSetupEvent event) {
 		schematicReceiver = new ServerSchematicLoader();
 		frequencyHandler = new FrequencyHandler();

src/main/java/com/simibubi/create/foundation/world/OreGeneration.java

@@ -0,0 +1,102 @@
+package com.simibubi.create.foundation.world;
+
+import com.simibubi.create.AllBlocks;
+import net.minecraft.block.Block;
+import net.minecraft.block.Blocks;
+import net.minecraft.world.biome.Biome;
+import net.minecraft.world.biome.Biomes;
+import net.minecraft.world.gen.GenerationStage;
+import net.minecraft.world.gen.feature.Feature;
+import net.minecraft.world.gen.feature.OreFeatureConfig;
+import net.minecraft.world.gen.placement.CountRangeConfig;
+import net.minecraft.world.gen.placement.Placement;
+import net.minecraftforge.registries.ForgeRegistries;
+
+import java.util.Arrays;
+import java.util.LinkedList;
+import java.util.List;
+
+public enum OreGeneration {
+
+	TEST_BLOB_1(new BasicOreGenConfig(Blocks.EMERALD_BLOCK, 25, 2, 128)),
+	TEST_BLOB_2(new BasicOreGenConfig(Blocks.QUARTZ_BLOCK, 41, 3, 25)),
+	TEST_BLOB_3(new OnlyInBiomes(new BasicOreGenConfig(Blocks.BLUE_GLAZED_TERRACOTTA, 5, 10, 30), Biome.Category.OCEAN)),
+	TEST_BLOB_4(new OnlyInBiomes(new BasicOreGenConfig(AllBlocks.GABBRO.get(), 31, 2, 128), Biomes.TAIGA, Biomes.TAIGA_HILLS, Biomes.TAIGA_MOUNTAINS)),
+
+	;
+
+	IOreGenConfig config;
+
+	OreGeneration(IOreGenConfig oreGenConfig) {
+		this.config = oreGenConfig;
+	}
+
+	public static void setupOreGeneration() {
+
+		for (Biome biome :
+				ForgeRegistries.BIOMES) {
+
+			Arrays.stream(values()).forEach(oreGen -> oreGen.config.addFeature(biome));
+		}
+	}
+
+	private static class BasicOreGenConfig implements IOreGenConfig {
+
+		Block block;
+		//im not 100% certain that these names are accurate but at least they seem that way
+		int clusterSize, clusterCount/*per chunk*/, maxHeight;
+
+		private BasicOreGenConfig(Block block, int clusterSize, int clusterCount, int maxHeight) {
+			this.block = block;
+			this.clusterSize = clusterSize;
+			this.clusterCount = clusterCount;
+			this.maxHeight = maxHeight;
+		}
+
+		@Override
+		public void addFeature(Biome biome) {
+			biome.addFeature(GenerationStage.Decoration.UNDERGROUND_ORES,
+					Biome.createDecoratedFeature(Feature.ORE,
+							new OreFeatureConfig(OreFeatureConfig.FillerBlockType.NATURAL_STONE,
+									block.getDefaultState(), clusterSize),
+							Placement.COUNT_RANGE, new CountRangeConfig(clusterCount, 0, 0, maxHeight)));
+		}
+
+	}
+
+	private static class OnlyInBiomes implements IOreGenConfig {
+
+		//not sure if this is really needed but w/e
+
+		IOreGenConfig config;
+		List<Biome> biomes;
+
+		private OnlyInBiomes(IOreGenConfig config, Biome... biomes) {
+			this.config = config;
+			this.biomes = Arrays.asList(biomes);
+		}
+
+		private OnlyInBiomes(IOreGenConfig config, Biome.Category category){
+			this.config = config;
+			this.biomes = new LinkedList<>();
+			for (Biome biome:
+			     ForgeRegistries.BIOMES) {
+				if (biome.getCategory() == category)
+					biomes.add(biome);
+			}
+		}
+
+		@Override
+		public void addFeature(Biome biome) {
+			if (biomes.contains(biome)) {
+				config.addFeature(biome);
+			}
+		}
+	}
+
+	private interface IOreGenConfig {
+
+		void addFeature(Biome biome);
+
+	}
+}