Added comments so its less of an impenetrable mess.

readme.md

@@ -16,7 +16,7 @@ Unless otherwise specified per file, or per package via the package-info.java fi
 
 Copyright © 2015 - Dries007 - Available under [GPLv3](license.md)
 
-This program conains code from the [Terrafirmacraft mod](https://github.com/Deadrik/TFCraft).
+This program contains code from the [Terrafirmacraft mod](https://github.com/Deadrik/TFCraft).
 
 Done/Todo
 ----

src/main/java/net/dries007/tfc/seedmaker/CommandLineInterface.java

@@ -55,23 +55,26 @@ public void run()
         System.out.println("- maps: " + maps);
 
         final JsonArray rootArray = new JsonArray();
-        Thread[] threadAray = new Thread[threads];
-        if (!seeds.isEmpty())
+        final Thread[] threadArray = new Thread[threads];
+
+        if (!seeds.isEmpty()) // We got seeds via CLI
         {
+            // Queue up all the seeds
             final ConcurrentLinkedQueue<WorldGen> queue = new ConcurrentLinkedQueue<>();
             for (String seed : seeds) queue.add(new WorldGen(seed, treesAboveWater, rocksInWater, radius, chunkSize, maps));
 
+            // Make a bunch of worker threads
             for (int i = 0; i < threads; i++)
             {
-                threadAray[i] = new Thread(new Runnable()
+                threadArray[i] = new Thread(new Runnable()
                 {
                     @Override
                     public void run()
                     {
                         while (!queue.isEmpty())
                         {
                             WorldGen worldGen = queue.poll();
-                            if (worldGen == null) continue;
+                            if (worldGen == null) continue; // Just in case
 
                             worldGen.run();
 
@@ -81,12 +84,14 @@ public void run()
                 });
             }
         }
-        else
+        else // We didn't get seeds via CLI, make some at random
         {
+            // todo: evaluate so we actually only count good seeds
             final AtomicInteger goodCount = new AtomicInteger();
+            // Make a bunch of worker threads
             for (int i = 0; i < threads; i++)
             {
-                threadAray[i] = new Thread(new Runnable()
+                threadArray[i] = new Thread(new Runnable()
                 {
                     @Override
                     public void run()
@@ -104,12 +109,14 @@ public void run()
             }
         }
 
-        for (int i = 0; i < threads; i++) threadAray[i].start();
+        // Now actually start the threads
+        for (int i = 0; i < threads; i++) threadArray[i].start();
 
+        // Output routine, quick and dirty.
         while (true)
         {
             boolean done = true;
-            for (int i = 0; i < threads; i++) if (threadAray[i].isAlive()) done = false;
+            for (int i = 0; i < threads; i++) if (threadArray[i].isAlive()) done = false;
             if (done) break;
             try
             {

src/main/java/net/dries007/tfc/seedmaker/util/Helper.java

@@ -40,10 +40,13 @@ public static <K, V> JsonElement toJson(Map<K, V> biomeMap)
         return object;
     }
 
-    public static PngWriter[] prepareGraphics(String[] filenames, int size, File folder, boolean[] maps)
+    /**
+     * Makes array of either null (if maps[n] is false) or a new PngWriter
+     */
+    public static PngWriter[] prepareGraphics(int size, File folder, boolean[] maps)
     {
-        PngWriter[] out = new PngWriter[filenames.length];
-        for (int i = 0; i < out.length; i++) if (maps[i]) out[i] = new PngWriter(new File(folder, filenames[i] + ".png"), new ImageInfo(size, size, 8, false), true);
+        PngWriter[] out = new PngWriter[Layers.values().length];
+        for (int i = 0; i < out.length; i++) if (maps[i]) out[i] = new PngWriter(new File(folder, Layers.values()[i].name().toLowerCase() + ".png"), new ImageInfo(size, size, 8, false), true);
         return out;
     }
 }

src/main/java/net/dries007/tfc/seedmaker/util/Layers.java

@@ -0,0 +1,28 @@
+package net.dries007.tfc.seedmaker.util;
+
+/**
+ * @author Dries007
+ */
+public enum Layers
+{
+    COMBINED(false),
+    BIOMES(false),
+    ROCK_TOP(true),
+    ROCK_MIDDLE(true),
+    ROCK_BOTTOM(true),
+    TREE_0(true),
+    TREE_1(true),
+    TREE_2(true),
+    EVT(false),
+    RAIN(false),
+    STABILITY(false),
+    PH(false),
+    DRAINAGE(false);
+
+    public final boolean addToCombined;
+
+    Layers(boolean addToCombined)
+    {
+        this.addToCombined = addToCombined;
+    }
+}