INMS Additions

src/main/java/com/volmit/iris/core/nms/INMSBinding.java

@@ -25,8 +25,12 @@ import org.bukkit.block.Biome;
 import org.bukkit.generator.ChunkGenerator;
 
 public interface INMSBinding {
+    boolean supportsCustomHeight();
+
     Object getBiomeBaseFromId(int id);
 
+    int getMinHeight(World world);
+
     boolean supportsCustomBiomes();
 
     int getTrueBiomeBaseId(Object biomeBase);

src/main/java/com/volmit/iris/core/nms/v16_1/NMSBinding16_1.java

@@ -68,6 +68,16 @@ public class NMSBinding16_1 implements INMSBinding {
         return null;
     }
 
+    @Override
+    public int getMinHeight(World world) {
+        return 0;
+    }
+
+    @Override
+    public boolean supportsCustomHeight() {
+        return false;
+    }
+
     @Override
     public boolean supportsCustomBiomes() {
         return false;

src/main/java/com/volmit/iris/core/nms/v16_2/NMSBinding16_2.java

@@ -125,6 +125,16 @@ public class NMSBinding16_2 implements INMSBinding {
         return false;
     }
 
+    @Override
+    public int getMinHeight(World world) {
+        return 0;
+    }
+
+    @Override
+    public boolean supportsCustomHeight() {
+        return false;
+    }
+
     private Class<?>[] classify(Object... par) {
         Class<?>[] g = new Class<?>[par.length];
         for (int i = 0; i < g.length; i++) {

src/main/java/com/volmit/iris/core/nms/v16_3/NMSBinding16_3.java

@@ -53,6 +53,16 @@ public class NMSBinding16_3 implements INMSBinding {
         return null;
     }
 
+    @Override
+    public boolean supportsCustomHeight() {
+        return false;
+    }
+
+    @Override
+    public int getMinHeight(World world) {
+        return 0;
+    }
+
     @Override
     public boolean supportsCustomBiomes() {
         return false;

src/main/java/com/volmit/iris/core/nms/v17_1/NMSBinding17_1.java

@@ -58,6 +58,11 @@ public class NMSBinding17_1 implements INMSBinding {
         return null;
     }
 
+    @Override
+    public boolean supportsCustomHeight() {
+        return false;
+    }
+
     private Field getFieldForBiomeStorage(Object storage) {
         Field f = biomeStorageCache;
 
@@ -108,6 +113,11 @@ public class NMSBinding17_1 implements INMSBinding {
         return true;
     }
 
+    @Override
+    public int getMinHeight(World world) {
+        return world.getMinHeight();
+    }
+
     @Override
     public Object getCustomBiomeBaseFor(String mckey) {
         try {

src/main/java/com/volmit/iris/core/nms/v1X/NMSBinding1X.java

@@ -24,12 +24,44 @@ import org.bukkit.World;
 import org.bukkit.block.Biome;
 import org.bukkit.generator.ChunkGenerator;
 
+import java.lang.reflect.Method;
+
 public class NMSBinding1X implements INMSBinding {
+    private static final boolean supportsCustomHeight = testCustomHeight();
+
+    @SuppressWarnings("ConstantConditions")
+    private static boolean testCustomHeight() {
+        try
+        {
+            if(World.class.getDeclaredMethod("getMaxHeight") != null && World.class.getDeclaredMethod("getMinHeight") != null);
+            {
+                return true;
+            }
+        }
+
+        catch(Throwable ignored)
+        {
+
+        }
+
+        return false;
+    }
+
+    @Override
+    public boolean supportsCustomHeight() {
+        return supportsCustomHeight;
+    }
+
     @Override
     public Object getBiomeBaseFromId(int id) {
         return null;
     }
 
+    @Override
+    public int getMinHeight(World world) {
+        return supportsCustomHeight ? world.getMinHeight() : 0;
+    }
+
     @Override
     public boolean supportsCustomBiomes() {
         return false;