use column in ChunkInterpolator

common/addons/biome-provider-extrusion/src/main/java/com/dfsek/terra/addons/biome/extrusion/BiomeExtrusionProvider.java

@@ -42,6 +42,13 @@ public class BiomeExtrusionProvider implements BiomeProvider {
         return delegate.getBaseBiome(x, z, seed);
     }
     
+    public Biome getBiome(int x, int y, int z, long seed, Biome biome) {
+        for(Extrusion extrusion : extrusions) {
+            biome = extrusion.extrude(biome, x, y, z, seed);
+        }
+        return biome;
+    }
+    
     @Override
     public Iterable<Biome> getBiomes() {
         return biomes;
@@ -51,8 +58,12 @@ public class BiomeExtrusionProvider implements BiomeProvider {
         return resolution;
     }
     
+    public BiomeProvider getDelegate() {
+        return delegate;
+    }
+    
     @Override
     public Column<Biome> getColumn(int x, int z, WorldProperties properties) {
-        return new ExtrusionColumn(properties, this, x, z);
+        return new ExtrusionColumn(properties, this, x, z, properties.getSeed());
     }
 }

common/addons/biome-provider-extrusion/src/main/java/com/dfsek/terra/addons/biome/extrusion/ExtrusionColumn.java

@@ -12,14 +12,16 @@ public class ExtrusionColumn implements Column<Biome> {
     private final BiomeExtrusionProvider provider;
     private final int x, z;
     private final long seed;
+    private final Column<Biome> delegate;
     
-    public ExtrusionColumn(WorldProperties worldProperties, BiomeExtrusionProvider provider, int x, int z) {
+    public ExtrusionColumn(WorldProperties worldProperties, BiomeExtrusionProvider provider, int x, int z, long seed) {
         this.min = worldProperties.getMinHeight();
         this.max = worldProperties.getMaxHeight();
         this.provider = provider;
         this.x = x;
         this.z = z;
         this.seed = worldProperties.getSeed();
+        this.delegate = provider.getDelegate().getColumn(x, z, seed, min, max);
     }
     
     @Override
@@ -44,7 +46,7 @@ public class ExtrusionColumn implements Column<Biome> {
     
     @Override
     public Biome get(int y) {
-        return provider.getBiome(x, y, z, seed);
+        return provider.getBiome(x, y, z, seed, delegate.get(y));
     }
     
     @Override