added world spawn of ores

src/main/java/de/jottyfan/minecraft/gta/Uno.java

@@ -5,6 +5,7 @@ import org.apache.logging.log4j.Logger;
 
 import de.jottyfan.minecraft.gta.block.UnoBlocks;
 import de.jottyfan.minecraft.gta.item.UnoItems;
+import de.jottyfan.minecraft.gta.feature.UnoFeatures;
 import net.fabricmc.api.ModInitializer;
 
 public class Uno implements ModInitializer {
@@ -17,5 +18,6 @@ public class Uno implements ModInitializer {
 		LOGGER.info("initializing uno");
 		UnoItems.registerUnoItems();
 		UnoBlocks.registerModBlocks();
+		UnoFeatures.registerFeatures();
 	}
 }

src/main/java/de/jottyfan/minecraft/gta/feature/UnoFeatures.java

@@ -0,0 +1,29 @@
+package de.jottyfan.minecraft.gta.feature;
+
+import de.jottyfan.minecraft.gta.Uno;
+import net.fabricmc.fabric.api.biome.v1.BiomeModifications;
+import net.fabricmc.fabric.api.biome.v1.BiomeSelectors;
+import net.minecraft.core.registries.Registries;
+import net.minecraft.resources.Identifier;
+import net.minecraft.resources.ResourceKey;
+import net.minecraft.world.level.levelgen.GenerationStep;
+import net.minecraft.world.level.levelgen.feature.ConfiguredFeature;
+import net.minecraft.world.level.levelgen.placement.PlacedFeature;
+
+public class UnoFeatures {
+    public static final ResourceKey<ConfiguredFeature<?, ?>> CF_RUBY_ORE = genCf("ruby_ore");
+
+    public static final ResourceKey<PlacedFeature> PF_RUBY_ORE = genPf("ruby_ore");
+
+    private static ResourceKey<ConfiguredFeature<?, ?>> genCf(String name) {
+		return ResourceKey.create(Registries.CONFIGURED_FEATURE, Identifier.fromNamespaceAndPath(Uno.MOD_ID, name));
+	}
+
+	private static ResourceKey<PlacedFeature> genPf(String name) {
+		return ResourceKey.create(Registries.PLACED_FEATURE, Identifier.fromNamespaceAndPath(Uno.MOD_ID, name));
+	}
+
+    public static final void registerFeatures() {
+		BiomeModifications.addFeature(BiomeSelectors.foundInOverworld(), GenerationStep.Decoration.UNDERGROUND_ORES, PF_RUBY_ORE);
+    }
+}

src/main/resources/data/uno/tag/block/mineable/pickaxe.json

@@ -0,0 +1,6 @@
+	{
+		"replace": false,
+		"values": [
+			"uno:ruby_ore"
+		]
+	}

src/main/resources/data/uno/tag/items/ores/ruby_ore.json

@@ -0,0 +1,6 @@
+{
+  "replace": false,
+  "values": [
+    "uno:ruby_ore"
+  ]
+}

src/main/resources/data/uno/worldgen/configured_feature/ruby_ore.json

@@ -0,0 +1,18 @@
+{
+  "type": "minecraft:ore",
+  "config": {
+    "discard_chance_on_air_exposure": 0.0,
+    "size": 10,
+    "targets": [
+      {
+        "state": {
+          "Name": "uno:ruby_ore"
+        },
+        "target": {
+          "predicate_type": "minecraft:tag_match",
+          "tag": "minecraft:stone_ore_replaceables"
+        }
+      }
+    ]
+  }
+}

src/main/resources/data/uno/worldgen/placed_feature/ruby_ore.json

@@ -0,0 +1,27 @@
+{
+  "feature": "uno:ruby_ore",
+  "placement": [
+    {
+      "type": "minecraft:count",
+      "count": 9
+    },
+    {
+      "type": "minecraft:in_square"
+    },
+    {
+      "type": "minecraft:height_range",
+      "height": {
+        "type": "minecraft:trapezoid",
+        "max_inclusive": {
+          "absolute": 128
+        },
+        "min_inclusive": {
+          "absolute": -128
+        }
+      }
+    },
+    {
+      "type": "minecraft:biome"
+    }
+  ]
+}