Filtering for matter

src/main/java/com/volmit/iris/util/hunk/Hunk.java

@@ -28,6 +28,7 @@ import com.volmit.iris.util.function.Consumer5;
 import com.volmit.iris.util.function.Consumer6;
 import com.volmit.iris.util.function.Consumer8;
 import com.volmit.iris.util.function.Function3;
+import com.volmit.iris.util.function.Function4;
 import com.volmit.iris.util.function.NoiseProvider;
 import com.volmit.iris.util.function.NoiseProvider3;
 import com.volmit.iris.util.function.Supplier3R;
@@ -749,6 +750,18 @@ public interface Hunk<T> {
         return this;
     }
 
+    default Hunk<T> updateSync(Function4<Integer, Integer, Integer, T, T> c) {
+        for (int i = 0; i < getWidth(); i++) {
+            for (int j = 0; j < getHeight(); j++) {
+                for (int k = 0; k < getDepth(); k++) {
+                    set(i,j,k,c.apply(i, j, k, get(i, j, k)));
+                }
+            }
+        }
+
+        return this;
+    }
+
     default Hunk<T> iterateSyncIO(Consumer4IO<Integer, Integer, Integer, T> c) throws IOException {
         for (int i = 0; i < getWidth(); i++) {
             for (int j = 0; j < getHeight(); j++) {

src/main/java/com/volmit/iris/util/matter/MatterFilter.java

@@ -0,0 +1,24 @@
+/*
+ * Iris is a World Generator for Minecraft Bukkit Servers
+ * Copyright (c) 2021 Arcane Arts (Volmit Software)
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+package com.volmit.iris.util.matter;
+
+@FunctionalInterface
+public interface MatterFilter<T> {
+    T update(int x, int y, int z, T t);
+}

src/main/java/com/volmit/iris/util/matter/MatterSlice.java

@@ -34,6 +34,11 @@ import java.io.IOException;
 public interface MatterSlice<T> extends Hunk<T> {
     Class<T> getType();
 
+    default void applyFilter(MatterFilter<T> filter)
+    {
+        updateSync(filter::update);
+    }
+
     void writeNode(T b, DataOutputStream dos) throws IOException;
 
     T readNode(DataInputStream din) throws IOException;