Initial world system with tile rendering & ionization support.

src/mightypork/gamecore/gui/components/LayoutComponent.java

@@ -13,6 +13,7 @@ import mightypork.util.constraints.rect.proxy.RectBound;
 import mightypork.util.control.Enableable;
 import mightypork.util.control.eventbus.EventBus;
 import mightypork.util.control.eventbus.clients.ClientHub;
+import mightypork.util.logging.Log;
 
 
 public abstract class LayoutComponent extends VisualComponent implements Enableable, ClientHub, AppAccess {
@@ -131,6 +132,7 @@ public abstract class LayoutComponent extends VisualComponent implements Enablea
 	public final void attach(Component component)
 	{
 		if (component == null) return;
+		if (component == this) throw new IllegalArgumentException("Uruboros. (infinite recursion evaded)");
 		
 		components.add(component);
 		addChildClient(component);

src/mightypork/gamecore/gui/components/VisualComponent.java

@@ -77,6 +77,7 @@ public abstract class VisualComponent extends AbstractRectCache implements Compo
 	@Override
 	public final void onLayoutChanged()
 	{
+		if (source == null) throw new NullPointerException("Component is missing a bounding rect.");
 		poll();
 	}
 	

src/mightypork/gamecore/render/Render.java

@@ -434,6 +434,12 @@ public class Render {
 	}
 	
 	
+	public static void quadColor(Rect quad, Color color)
+	{
+		quadColor(quad, color, color, color, color);
+	}
+	
+	
 	/**
 	 * Draw quad with coloured vertices.
 	 * 

src/mightypork/rogue/App.java

@@ -22,10 +22,12 @@ import mightypork.rogue.screens.main_menu.ScreenMainMenu;
 import mightypork.rogue.screens.test_bouncyboxes.ScreenTestBouncy;
 import mightypork.rogue.screens.test_cat_sound.ScreenTestCat;
 import mightypork.rogue.screens.test_render.ScreenTestRender;
-import mightypork.rogue.world.WorldMap;
+import mightypork.rogue.world.LocalPlayer;
+import mightypork.rogue.world.World;
+import mightypork.rogue.world.WorldPos;
 import mightypork.rogue.world.item.Item;
+import mightypork.rogue.world.map.LevelMap;
 import mightypork.rogue.world.tile.Tile;
-import mightypork.rogue.world.tile.TileItems;
 import mightypork.util.control.eventbus.EventBus;
 import mightypork.util.control.eventbus.events.Event;
 import mightypork.util.files.ion.Ion;
@@ -107,10 +109,12 @@ public final class App extends BaseApp {
 	@Override
 	protected void preInit()
 	{
-		Ion.registerIonizable(Tile.ION_MARK, Tile.class);
 		Ion.registerIonizable(Item.ION_MARK, Item.class);
-		Ion.registerIonizable(WorldMap.ION_MARK, WorldMap.class);
-		Ion.registerIonizable(TileItems.ION_MARK, TileItems.class); // used by tile to store contained items
+		Ion.registerIonizable(LevelMap.ION_MARK, LevelMap.class);
+		Ion.registerIonizable(LocalPlayer.ION_MARK, LocalPlayer.class);
+		Ion.registerIonizable(Tile.ION_MARK, Tile.class);
+		Ion.registerIonizable(World.ION_MARK, World.class);
+		Ion.registerIonizable(WorldPos.ION_MARK, WorldPos.class);
 	}
 	
 	

src/mightypork/rogue/Res.java

@@ -80,8 +80,16 @@ public final class Res {
 		texture = textures.loadTexture("tiles", "/res/img/map_tiles.png", FilterMode.NEAREST, WrapMode.CLAMP);
 		final QuadGrid tiles = texture.grid(32, 32);
 		
-		textures.addSheet("tile.mossy_bricks.wall", tiles.makeSheet(4, 0, 7, 1));
-		textures.addSheet("tile.mossy_bricks.floor", tiles.makeSheet(16, 5, 7, 1));
+		textures.addSheet("tile.wall.mossy_bricks", tiles.makeSheet(4, 0, 7, 1));
+		textures.addSheet("tile.wall.small_bricks", tiles.makeSheet(0, 0, 4, 1));
+		textures.addSheet("tile.floor.mossy_bricks", tiles.makeSheet(16, 5, 7, 1));
+		textures.addSheet("tile.floor.rect_bricks", tiles.makeSheet(23, 5, 4, 1));
+		textures.addSheet("tile.wall.sandstone", tiles.makeSheet(0, 3, 10, 1));
+		textures.addSheet("tile.floor.sandstone", tiles.makeSheet(0, 6, 10, 1));
+		textures.addSheet("tile.wall.brown_cobble", tiles.makeSheet(0, 8, 8, 1));
+		textures.addSheet("tile.floor.brown_cobble", tiles.makeSheet(0, 11, 9, 1));
+		textures.addSheet("tile.floor.crystal", tiles.makeSheet(4, 5, 6, 1));
+		textures.addSheet("tile.wall.crystal", tiles.makeSheet(12, 2, 14, 1));
 	}
 	
 	

src/mightypork/rogue/screens/ingame/GameGui.java

@@ -8,14 +8,17 @@ import mightypork.gamecore.gui.components.painters.ImagePainter;
 import mightypork.gamecore.gui.components.painters.QuadPainter;
 import mightypork.gamecore.gui.screens.Screen;
 import mightypork.gamecore.gui.screens.ScreenLayer;
+import mightypork.gamecore.render.Render;
 import mightypork.rogue.Res;
 import mightypork.util.constraints.num.Num;
 import mightypork.util.constraints.rect.Rect;
 import mightypork.util.math.color.PAL16;
+import mightypork.util.math.color.RGB;
 
 
 public class GameGui extends ScreenLayer {
 	
+
 	public GameGui(Screen screen)
 	{
 		super(screen);
@@ -23,11 +26,7 @@ public class GameGui extends ScreenLayer {
 		final Num h = root.height();
 		final Num w = root.width();
 		final Num minWH = w.min(h).max(700); // avoid too small shrinking
-		
-		final Component qp = new QuadPainter(PAL16.VOID);
-		qp.setRect(root);
-		root.add(qp);
-		
+				
 		final ImagePainter nav = new ImagePainter(Res.getTxQuad("panel"));
 		nav.setRect(root.bottomEdge().growUp(minWH.perc(7)));
 		root.add(nav);
@@ -60,4 +59,12 @@ public class GameGui extends ScreenLayer {
 		return 100;
 	}
 	
+	@Override
+	public void render()
+	{
+		
+		
+		super.render();
+	}
+	
 }

src/mightypork/rogue/screens/ingame/ScreenGame.java

@@ -10,7 +10,8 @@ public class ScreenGame extends LayeredScreen {
 	public ScreenGame(AppAccess app)
 	{
 		super(app);
-		
+
+		addLayer(new WorldLayer(this)); //TODO with provided world
 		addLayer(new GameGui(this));
 	}
 	

src/mightypork/rogue/screens/ingame/WorldLayer.java

@@ -0,0 +1,32 @@
+package mightypork.rogue.screens.ingame;
+
+
+import java.util.Random;
+
+import mightypork.gamecore.gui.screens.Screen;
+import mightypork.gamecore.gui.screens.ScreenLayer;
+import mightypork.rogue.world.MapGenerator;
+import mightypork.rogue.world.World;
+
+
+public class WorldLayer extends ScreenLayer {
+	
+	public WorldLayer(Screen screen)
+	{
+		super(screen);
+		
+		Random rand = new Random();
+		World w = MapGenerator.createWorld(rand.nextLong());
+		
+		WorldRenderer wr = new WorldRenderer(w);
+		wr.setRect(root);
+		root.add(wr);
+	}
+	
+	@Override
+	public int getPriority()
+	{
+		return -1;
+	}
+	
+}

src/mightypork/rogue/screens/ingame/WorldRenderer.java

@@ -0,0 +1,68 @@
+package mightypork.rogue.screens.ingame;
+
+
+import mightypork.gamecore.control.events.MouseButtonEvent;
+import mightypork.gamecore.gui.components.InputComponent;
+import mightypork.gamecore.render.Render;
+import mightypork.rogue.world.World;
+import mightypork.util.constraints.num.Num;
+import mightypork.util.constraints.rect.Rect;
+import mightypork.util.control.timing.Updateable;
+import mightypork.util.math.color.PAL16;
+import mightypork.util.math.color.RGB;
+
+
+public class WorldRenderer extends InputComponent implements Updateable {
+	
+	private final World world;
+	private final Rect rightShadow;
+	private final Rect leftShadow;
+	private final Rect topShadow;
+	private final Rect bottomShadow;
+	
+	
+	public WorldRenderer(World world)
+	{
+		this.world = world;
+		
+		final Num h = height();
+		final Num w = width();
+		final Num minWH = w.min(h).max(700);
+				
+		Num grX = w.perc(30);
+		Num grY = h.perc(20);
+		
+		leftShadow = leftEdge().growRight(grX);
+		rightShadow = rightEdge().growLeft(grX);
+		topShadow = topEdge().growDown(grY);
+		bottomShadow = bottomEdge().growUp(grY).moveY(minWH.perc(-6));
+	}
+	
+	
+	@Override
+	public void receive(MouseButtonEvent event)
+	{
+		System.out.println("world clciked, yo");
+	}
+	
+	
+	@Override
+	protected void renderComponent()
+	{		
+		world.render(this, 8, 6, 64);
+		
+		Render.quadGradH(leftShadow, RGB.BLACK, RGB.NONE);
+		Render.quadGradH(rightShadow, RGB.NONE, RGB.BLACK);
+		
+		Render.quadGradV(topShadow, RGB.BLACK, RGB.NONE);
+		Render.quadGradV(bottomShadow, RGB.NONE, RGB.BLACK);
+	}
+	
+	
+	@Override
+	public void update(double delta)
+	{
+		world.update(delta);
+	}
+	
+}

src/mightypork/rogue/world/LocalPlayer.java

@@ -0,0 +1,83 @@
+package mightypork.rogue.world;
+
+
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.OutputStream;
+
+import mightypork.util.files.ion.Ion;
+import mightypork.util.files.ion.IonBundle;
+import mightypork.util.files.ion.IonConstructor;
+import mightypork.util.files.ion.Ionizable;
+
+
+/**
+ * Player info
+ * 
+ * @author MightyPork
+ */
+public class LocalPlayer implements Ionizable, MapObserver {
+	
+	public static final short ION_MARK = 708;
+	
+	public WorldPos position = new WorldPos();
+	
+	
+	@IonConstructor
+	public LocalPlayer()
+	{
+	}
+	
+	
+	public LocalPlayer(int x, int y, int floor)
+	{
+		this.position.setTo(x, y, floor);
+	}
+	
+	
+	public LocalPlayer(WorldPos pos)
+	{
+		this.position = pos;
+	}
+	
+	
+	@Override
+	public void load(InputStream in) throws IOException
+	{
+		IonBundle ib = (IonBundle) Ion.readObject(in);
+		
+		position = ib.get("pos", position);
+	}
+	
+	
+	@Override
+	public void save(OutputStream out) throws IOException
+	{
+		IonBundle ib = new IonBundle();
+		
+		ib.put("pos", position);
+		
+		Ion.writeObject(out, ib);
+	}
+	
+	
+	@Override
+	public short getIonMark()
+	{
+		return ION_MARK;
+	}
+	
+	
+	@Override
+	public WorldPos getPosition()
+	{
+		return position;
+	}
+	
+	
+	@Override
+	public int getViewRange()
+	{
+		return 15;
+	}
+}

src/mightypork/rogue/world/MapGenerator.java

@@ -0,0 +1,54 @@
+package mightypork.rogue.world;
+
+
+import java.util.Random;
+
+import mightypork.rogue.world.map.LevelMap;
+import mightypork.rogue.world.tile.Tiles;
+
+
+public class MapGenerator {
+	
+	public static final Random rand = new Random();
+	
+	
+	public static World createWorld(long seed)
+	{
+		synchronized (rand) {
+			rand.setSeed(seed);
+			
+			World w = new World();
+			w.setSeed(seed);
+			
+			int levels = 4 + rand.nextInt(6);
+			
+			for (int i = 0; i < levels; i++) {
+				w.addLevel(createLevel(rand.nextLong()));
+			}
+			
+			// TODO place on start position
+			w.setPlayer(new LocalPlayer(10, 10, 0));
+			return w;	
+		}
+	}
+	
+	
+	private static LevelMap createLevel(long seed)
+	{
+		// TODO
+		
+		LevelMap lm = new LevelMap(20, 20);
+		
+		lm.fill(Tiles.CRYSTAL_FLOOR);
+		
+		Random rand = new Random();
+		rand.setSeed(seed);
+		
+		for (int i = 0; i < 150; i++) {
+			lm.setTile(Tiles.CRYSTAL_WALL, rand.nextInt(20), rand.nextInt(20));
+		}
+		
+		return lm;
+	}
+	
+}

src/mightypork/rogue/world/MapObserver.java

@@ -0,0 +1,22 @@
+package mightypork.rogue.world;
+
+
+/**
+ * Player observing a map represented by an observer.
+ * 
+ * @author MightyPork
+ */
+public interface MapObserver {
+	
+	/**
+	 * @return observer's position
+	 */
+	public WorldPos getPosition();
+	
+	
+	/**
+	 * @return observed range (in tiles)
+	 */
+	public int getViewRange();
+	
+}

src/mightypork/rogue/world/World.java

@@ -0,0 +1,185 @@
+package mightypork.rogue.world;
+
+
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.OutputStream;
+import java.util.HashSet;
+import java.util.Set;
+
+import mightypork.gamecore.render.Render;
+import mightypork.rogue.world.map.LevelMap;
+import mightypork.rogue.world.map.TileRenderContext;
+import mightypork.rogue.world.structs.LevelList;
+import mightypork.util.constraints.rect.Rect;
+import mightypork.util.constraints.rect.RectConst;
+import mightypork.util.constraints.rect.proxy.RectBound;
+import mightypork.util.constraints.vect.Vect;
+import mightypork.util.constraints.vect.VectConst;
+import mightypork.util.control.timing.Updateable;
+import mightypork.util.error.CorruptedDataException;
+import mightypork.util.files.ion.Ion;
+import mightypork.util.files.ion.IonBundle;
+import mightypork.util.files.ion.Ionizable;
+import mightypork.util.math.color.RGB;
+
+
+public class World implements Ionizable, Updateable {
+	
+	public static final short ION_MARK = 706;
+	
+	private LevelList levels = new LevelList();
+	
+	private LocalPlayer player = new LocalPlayer();
+	
+	private transient final Set<MapObserver> observers = new HashSet<>();
+	
+	private long seed;
+	
+	
+	@Override
+	public void load(InputStream in) throws IOException
+	{
+		// world data
+		IonBundle ib = (IonBundle) Ion.readObject(in);
+		player = ib.get("player", player);
+		levels = ib.get("levels", levels);
+		seed = ib.get("seed", seed);
+		
+		// levels
+		Ion.readSequence(in, levels);
+		
+		if (player == null) throw new CorruptedDataException("Null player in world.");
+	}
+	
+	
+	@Override
+	public void save(OutputStream out) throws IOException
+	{
+		IonBundle ib = new IonBundle();
+		ib.put("player", player);
+		ib.put("levels", levels);
+		ib.put("seed", seed);
+	}
+	
+	
+	public void setPlayer(LocalPlayer player)
+	{
+		removeObserver(this.player);
+		
+		this.player = player;
+		
+		addObserver(player);
+	}
+	
+	
+	public void removeObserver(MapObserver observer)
+	{
+		observers.remove(observer);
+	}
+	
+	
+	public void addObserver(MapObserver observer)
+	{
+		observers.add(observer);
+	}
+	
+	
+	public void addLevel(LevelMap level)
+	{
+		levels.add(level);
+	}
+	
+	
+	@Override
+	public short getIonMark()
+	{
+		return ION_MARK;
+	}
+	
+	
+	@Override
+	public void update(double delta)
+	{
+		for (int level = 0; level < levels.size(); level++) {
+			for (MapObserver observer : observers) {
+				if (observer.getPosition().floor == level) {
+					levels.get(level).update(observer, delta);
+				}
+			}
+		}
+	}
+	
+	
+	public LevelMap getLevelForObserver(MapObserver observer)
+	{
+		return levels.get(observer.getPosition().floor);
+	}
+	
+	
+	/**
+	 * Draw on screen
+	 * 
+	 * @param viewport rendering area on screen
+	 * @param xTiles Desired nr of tiles horizontally
+	 * @param yTiles Desired nr of tiles vertically
+	 * @param minSize minimum tile size
+	 */
+	public void render(final RectBound viewport, final int yTiles, final int xTiles, final int minSize)
+	{
+		LevelMap floor = getLevelForObserver(player); // TODO fractional movement
+		
+		Rect r = viewport.getRect();
+		double vpH = r.height().value();
+		double vpW = r.width().value();
+		
+		// adjust tile size to fit desired amount of tiles
+		
+		double allowedSizeW = vpW / xTiles;
+		double allowedSizeH = vpH / yTiles;
+		int tileSize = (int) Math.round(Math.max(Math.min(allowedSizeH, allowedSizeW), minSize));
+		
+		tileSize -= tileSize % 16;
+		
+		VectConst vpCenter = r.center().sub(tileSize * 0.5, tileSize).freeze(); // 0.5 to center, 1 to move up (down is teh navbar)
+		
+		int playerX = player.getPosition().x;
+		int playerY = player.getPosition().y;
+		
+		// total map area
+		//@formatter:off
+		RectConst mapRect = vpCenter.startRect().grow(
+				playerX*tileSize,
+				playerY*tileSize,//
+				(floor.getWidth() - playerX) * tileSize,
+				(floor.getHeight() - playerY) * tileSize
+		).freeze();
+		//@formatter:on
+		
+		// tiles to render
+		int x1 = (int) Math.floor(playerX - (vpW / tileSize));
+		int y1 = (int) Math.floor(playerY - (vpH / tileSize));
+		int x2 = (int) Math.ceil(playerX + (vpW / tileSize));
+		int y2 = (int) Math.ceil(playerY + (vpH / tileSize));
+		
+		TileRenderContext trc = new TileRenderContext(floor, mapRect); //-tileSize*0.5
+		for (trc.y = y1; trc.y <= y2; trc.y++) {
+			for (trc.x = x1; trc.x <= x2; trc.x++) {
+				trc.render();
+			}
+		}
+	}
+	
+	
+	public void setSeed(long seed)
+	{
+		this.seed = seed;
+	}
+	
+	
+	public long getSeed()
+	{
+		return seed;
+	}
+	
+}

src/mightypork/rogue/world/WorldPos.java

@@ -0,0 +1,71 @@
+package mightypork.rogue.world;
+
+
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.OutputStream;
+
+import mightypork.util.files.ion.Ion;
+import mightypork.util.files.ion.IonConstructor;
+import mightypork.util.files.ion.Ionizable;
+
+
+/**
+ * A simple dimension data object
+ * 
+ * @author MightyPork
+ */
+public class WorldPos implements Ionizable {
+	
+	public static final short ION_MARK = 707;
+	
+	public int x, y, floor;
+	
+	
+	public WorldPos(int x, int y, int z)
+	{
+		super();
+		this.x = x;
+		this.y = y;
+		this.floor = z;
+	}
+	
+	
+	@IonConstructor
+	public WorldPos()
+	{
+	}
+	
+	
+	@Override
+	public void load(InputStream in) throws IOException
+	{
+		x = Ion.readInt(in);
+		y = Ion.readInt(in);
+		floor = Ion.readInt(in);
+	}
+	
+	
+	@Override
+	public void save(OutputStream out) throws IOException
+	{
+		Ion.writeInt(out, x);
+		Ion.writeInt(out, y);
+		Ion.writeInt(out, floor);
+	}
+	
+	
+	@Override
+	public short getIonMark()
+	{
+		return ION_MARK;
+	}
+	
+	
+	public void setTo(int x, int y, int z)
+	{
+		this.x = x;
+		this.y = y;
+		this.floor = z;
+	}
+}

src/mightypork/rogue/world/item/Item.java

@@ -5,7 +5,7 @@ import java.io.IOException;
 import java.io.InputStream;
 import java.io.OutputStream;
 
-import mightypork.rogue.world.tile.TileRenderContext;
+import mightypork.rogue.world.map.TileRenderContext;
 import mightypork.util.constraints.rect.proxy.RectBound;
 import mightypork.util.control.timing.Animator;
 import mightypork.util.control.timing.AnimatorBounce;
@@ -75,9 +75,9 @@ public class Item implements Updateable, Ionizable {
 	{
 		final IonBundle ib = (IonBundle) Ion.readObject(in);
 		
-		id = ib.get("id", id);
-		flags = ib.get("flags", flags);
-		numbers = ib.get("numbers", numbers);
+		id = ib.get("id", 0);
+		flags = ib.get("flags", null);
+		numbers = ib.get("numbers", null);
 		
 		if (id != model.id) {
 			model = Items.get(id);

src/mightypork/rogue/world/item/ItemModel.java

@@ -1,7 +1,7 @@
 package mightypork.rogue.world.item;
 
 
-import mightypork.rogue.world.tile.TileRenderContext;
+import mightypork.rogue.world.map.TileRenderContext;
 import mightypork.util.annotations.DefaultImpl;
 import mightypork.util.constraints.num.proxy.NumBoundAdapter;
 import mightypork.util.constraints.rect.Rect;

src/mightypork/rogue/world/map/LevelMap.java

@@ -1,19 +1,27 @@
-package mightypork.rogue.world;
+package mightypork.rogue.world.map;
 
 
 import java.io.IOException;
 import java.io.InputStream;
 import java.io.OutputStream;
 
+import mightypork.rogue.world.MapObserver;
+import mightypork.rogue.world.WorldPos;
 import mightypork.rogue.world.tile.Tile;
-import mightypork.rogue.world.tile.TileGrid;
+import mightypork.rogue.world.tile.TileModel;
 import mightypork.rogue.world.tile.Tiles;
 import mightypork.util.files.ion.Ion;
 import mightypork.util.files.ion.IonConstructor;
 import mightypork.util.files.ion.Ionizable;
+import mightypork.util.logging.Log;
 
 
-public class WorldMap implements TileGrid, Ionizable {
+/**
+ * One level of the dungeon
+ * 
+ * @author MightyPork
+ */
+public class LevelMap implements MapAccess, Ionizable {
 	
 	public static final int ION_MARK = 702;
 	
@@ -22,14 +30,17 @@ public class WorldMap implements TileGrid, Ionizable {
 	/** Array of tiles [y][x] */
 	private Tile[][] tiles;
 	
+	/** Level seed (used for generation and tile variation) */
+	public long seed;
+	
 	
 	@IonConstructor
-	public WorldMap()
+	public LevelMap()
 	{
 	}
 	
 	
-	public WorldMap(int width, int height)
+	public LevelMap(int width, int height)
 	{
 		this.width = width;
 		this.height = height;
@@ -41,9 +52,21 @@ public class WorldMap implements TileGrid, Ionizable {
 	{
 		this.tiles = new Tile[height][width];
 		
+		fill(Tiles.NULL_EMPTY);
+	}
+	
+	
+	public void fill(int id)
+	{
+		fill(Tiles.get(id));
+	}
+	
+	
+	public void fill(TileModel model)
+	{
 		for (int y = 0; y < height; y++) {
 			for (int x = 0; x < width; x++) {
-				tiles[y][x] = Tiles.NONE.create();
+				tiles[y][x] = model.createTile();
 			}
 		}
 	}
@@ -52,10 +75,18 @@ public class WorldMap implements TileGrid, Ionizable {
 	@Override
 	public final Tile getTile(int x, int y)
 	{
+		if (x < 0 || x >= width || y < 0 || y >= height) return Tiles.NULL_SOLID.createTile(); // out of range
+			
 		return tiles[y][x];
 	}
 	
 	
+	public final void setTile(TileModel model, int x, int y)
+	{
+		setTile(model.createTile(), x, y);
+	}
+	
+	
 	public final void setTile(int tileId, int x, int y)
 	{
 		setTile(new Tile(tileId), x, y);
@@ -64,6 +95,8 @@ public class WorldMap implements TileGrid, Ionizable {
 	
 	public final void setTile(Tile tile, int x, int y)
 	{
+		if (x < 0 || x > width || y < 0 || y >= height) return; // out of range
+			
 		tiles[y][x] = tile;
 	}
 	
@@ -82,6 +115,19 @@ public class WorldMap implements TileGrid, Ionizable {
 	}
 	
 	
+	public void setSeed(long seed)
+	{
+		this.seed = seed;
+	}
+	
+	
+	@Override
+	public long getSeed()
+	{
+		return seed;
+	}
+	
+	
 	@Override
 	public void load(InputStream in) throws IOException
 	{
@@ -132,4 +178,28 @@ public class WorldMap implements TileGrid, Ionizable {
 		return ION_MARK;
 	}
 	
+	
+	public void update(MapObserver observer, double delta)
+	{
+		int viewRange = observer.getViewRange();
+		WorldPos position = observer.getPosition();
+		
+		int x1 = position.x - viewRange;
+		int y1 = position.y - viewRange;
+		
+		int x2 = x1 + viewRange * 2;
+		int y2 = y1 + viewRange * 2;
+		
+		x1 = Math.min(Math.max(0, x1), width);
+		y1 = Math.min(Math.max(0, y1), height);
+		x2 = Math.min(x2, width);
+		y2 = Math.max(y2, height);
+		
+		for (int y = y1; y <= y2; y++) {
+			for (int x = x1; x <= x2; x++) {
+				getTile(x, y).update(delta);
+			}
+		}
+	}
+	
 }

src/mightypork/rogue/world/map/MapAccess.java

@@ -0,0 +1,40 @@
+package mightypork.rogue.world.map;
+
+
+import mightypork.rogue.world.tile.Tile;
+
+
+/**
+ * Access interface for a level map.
+ * 
+ * @author MightyPork
+ */
+public interface MapAccess {
+	
+	/**
+	 * Ge tile at X,Y
+	 * 
+	 * @param x
+	 * @param y
+	 * @return tile
+	 */
+	Tile getTile(int x, int y);
+	
+	
+	/**
+	 * @return map width in tiles
+	 */
+	int getWidth();
+	
+	
+	/**
+	 * @return map height in tiles
+	 */
+	int getHeight();
+	
+	
+	/**
+	 * @return map seed
+	 */
+	long getSeed();
+}

src/mightypork/rogue/world/map/TileRenderContext.java

@@ -1,45 +1,65 @@
-package mightypork.rogue.world.tile;
+package mightypork.rogue.world.map;
 
 
+import mightypork.rogue.world.tile.Tile;
 import mightypork.util.constraints.rect.Rect;
 import mightypork.util.constraints.rect.builders.TiledRect;
 import mightypork.util.constraints.rect.proxy.RectBound;
 import mightypork.util.math.noise.NoiseGen;
 
 
+/**
+ * Context for tile rendering. Provides tile rect, surrounding tiles, rendered
+ * tile and random noise values for position-static tile variation.
+ * 
+ * @author MightyPork
+ */
 public final class TileRenderContext implements RectBound {
 	
-	private final TileGrid map;
+	private final MapAccess map;
 	private final TiledRect tiler;
 	private final NoiseGen noise;
 	
 	public int x, y;
 	
 	
-	public TileRenderContext(TileGrid map, Rect drawArea, long renderNoiseSeed)
+	public TileRenderContext(MapAccess map, Rect drawArea)
 	{
 		this.map = map;
 		this.tiler = drawArea.tiles(map.getWidth(), map.getHeight());
-		this.noise = new NoiseGen(0.2, 0, 0.5, 1, renderNoiseSeed);
+		this.noise = new NoiseGen(0.2, 0, 0.5, 1, map.getSeed());
 	}
 	
 	
+	/**
+	 * @return the rendered tile.
+	 */
 	public Tile getTile()
 	{
 		return map.getTile(x, y);
 	}
 	
 	
+	/**
+	 * Get a neighbor tile
+	 * 
+	 * @param offsetX x offset (left-right)
+	 * @param offsetY y offset (up-down)
+	 * @return the tile at that position
+	 */
 	public Tile getAdjacentTile(int offsetX, int offsetY)
 	{
 		return map.getTile(x + offsetX, y + offsetY);
 	}
 	
 	
+	/**
+	 * Rect of the current tile to draw
+	 */
 	@Override
 	public Rect getRect()
 	{
-		return tiler.tile(x, y);
+		return tiler.tile(x, y).grow(0.01); // important to avoid gaps b/w tiles when scaled.
 	}
 	
 	
@@ -52,15 +72,8 @@ public final class TileRenderContext implements RectBound {
 	}
 	
 	
-	public void setCoord(int x, int y)
+	public void render()
 	{
-		this.x = x;
-		this.y = y;
-	}
-	
-	
-	public void renderTile(Tile t)
-	{
-		t.render(this);
+		map.getTile(x, y).render(this);
 	}
 }

src/mightypork/rogue/world/structs/ItemStack.java

@@ -0,0 +1,19 @@
+package mightypork.rogue.world.structs;
+
+
+import mightypork.rogue.world.item.Item;
+import mightypork.util.files.ion.templates.IonizableStack;
+
+
+public class ItemStack extends IonizableStack<Item> {
+	
+	private static final short ION_MARK = 710;
+	
+	
+	@Override
+	public short getIonMark()
+	{
+		return ION_MARK;
+	}
+	
+}

src/mightypork/rogue/world/structs/LevelList.java

@@ -0,0 +1,18 @@
+package mightypork.rogue.world.structs;
+
+
+import mightypork.rogue.world.map.LevelMap;
+import mightypork.util.files.ion.templates.IonizableArrayList;
+
+
+public class LevelList extends IonizableArrayList<LevelMap> {
+	
+	public static final short ION_MARK = 709;
+	
+	@Override
+	public short getIonMark()
+	{
+		return ION_MARK;
+	}
+	
+}

src/mightypork/rogue/world/tile/Tile.java

@@ -4,7 +4,10 @@ package mightypork.rogue.world.tile;
 import java.io.IOException;
 import java.io.InputStream;
 import java.io.OutputStream;
+import java.util.Stack;
 
+import mightypork.rogue.world.item.Item;
+import mightypork.rogue.world.map.TileRenderContext;
 import mightypork.util.control.timing.Animator;
 import mightypork.util.control.timing.Updateable;
 import mightypork.util.files.ion.Ion;
@@ -23,7 +26,7 @@ public final class Tile implements Ionizable, Updateable {
 	
 	public int id;
 	
-	public TileItems items;
+	public Stack<Item> items = new Stack<>();
 	
 	public boolean[] flags;
 	public int[] numbers;
@@ -45,13 +48,12 @@ public final class Tile implements Ionizable, Updateable {
 	{
 		this.model = model;
 		this.id = model.id;
-		this.items = new TileItems();
 	}
 	
 	
 	public void render(TileRenderContext context)
 	{
-		model.render(this, context);
+		model.render(context);
 		
 		if (!items.isEmpty()) {
 			items.peek().renderOnTile(context);
@@ -69,7 +71,8 @@ public final class Tile implements Ionizable, Updateable {
 		ib.put("id", id);
 		ib.put("flags", flags);
 		ib.put("numbers", numbers);
-		ib.put("items", items);
+		
+		Ion.writeSequence(out, items);
 		
 		Ion.writeObject(out, ib);
 	}
@@ -78,12 +81,15 @@ public final class Tile implements Ionizable, Updateable {
 	@Override
 	public void load(InputStream in) throws IOException
 	{
+		// bundle of data
 		final IonBundle ib = (IonBundle) Ion.readObject(in);
-		
 		id = ib.get("id", id);
 		flags = ib.get("flags", flags);
 		numbers = ib.get("numbers", numbers);
-		items = ib.get("items", items);
+		
+		// stored items
+		items.clear();
+		Ion.readSequence(in, items);
 		
 		// renew model
 		if (model == null || id != model.id) {
@@ -102,6 +108,7 @@ public final class Tile implements Ionizable, Updateable {
 	@Override
 	public void update(double delta)
 	{
+		model.update(this, delta);
 		if (!items.isEmpty()) {
 			items.peek().update(delta);
 		}

src/mightypork/rogue/world/tile/TileGrid.java

@@ -1,13 +0,0 @@
-package mightypork.rogue.world.tile;
-
-
-public interface TileGrid {
-	
-	Tile getTile(int x, int y);
-	
-	
-	int getWidth();
-	
-	
-	int getHeight();
-}

src/mightypork/rogue/world/tile/TileModel.java

@@ -1,6 +1,7 @@
 package mightypork.rogue.world.tile;
 
 
+import mightypork.rogue.world.map.TileRenderContext;
 import mightypork.util.annotations.DefaultImpl;
 
 
@@ -23,10 +24,14 @@ public abstract class TileModel {
 	
 	
 	/**
+	 * Create a tile. In case of null tiles / tiles with absolutely no
+	 * variability, the same instance can be returned over and over (created ie.
+	 * using lazy load)
+	 * 
 	 * @return new tile with this model
 	 */
 	@DefaultImpl
-	public Tile create()
+	public Tile createTile()
 	{
 		return new Tile(this);
 	}
@@ -35,10 +40,9 @@ public abstract class TileModel {
 	/**
 	 * Render the tile.
 	 * 
-	 * @param tile
 	 * @param context
 	 */
-	public abstract void render(Tile tile, TileRenderContext context);
+	public abstract void render(TileRenderContext context);
 	
 	
 	/**
@@ -49,7 +53,11 @@ public abstract class TileModel {
 	
 	
 	/**
-	 * @return true if the tile can be walkable at some conditions
+	 * Check if the tile is walkable at some conditions. Used for world
+	 * generation to distinguish between doors etc and regular walls.<br>
+	 * Null tile should return true, if it can be replaced by a regular floor.
+	 * 
+	 * @return if it's potentially walkable
 	 */
 	public abstract boolean isPotentiallyWalkable();
 	
@@ -59,4 +67,13 @@ public abstract class TileModel {
 		return false;
 	}
 	
+	
+	/**
+	 * Update a tile
+	 * 
+	 * @param tile tile
+	 * @param delta delta time
+	 */
+	public abstract void update(Tile tile, double delta);
+	
 }

src/mightypork/rogue/world/tile/Tiles.java

@@ -2,7 +2,9 @@ package mightypork.rogue.world.tile;
 
 
 import mightypork.rogue.world.tile.models.Floor;
-import mightypork.rogue.world.tile.models.NullTile;
+import mightypork.rogue.world.tile.models.NullFloor;
+import mightypork.rogue.world.tile.models.NullWall;
+import mightypork.rogue.world.tile.models.Wall;
 
 
 /**
@@ -14,14 +16,27 @@ public final class Tiles {
 	
 	private static final TileModel[] tiles = new TileModel[256];
 	
-	public static final TileModel NONE = new NullTile(0);
-	public static final TileModel FLOOR_MOSSY = new Floor(1, "tile.mossy_bricks.floor");
-	public static final TileModel WALL_MOSSY = new Floor(2, "tile.mossy_bricks.wall");
+	public static final TileModel NULL_SOLID = new NullWall(0);
+	public static final TileModel NULL_EMPTY = new NullFloor(1);
+	public static final TileModel BRICK_FLOOR_VINES = new Floor(2, "tile.floor.mossy_bricks");
+	public static final TileModel BRICK_WALL_VINES = new Wall(3, "tile.wall.mossy_bricks");
+	public static final TileModel BRICK_FLOOR_RECT = new Floor(4, "tile.floor.rect_bricks");
+	public static final TileModel BRICK_WALL_SMALL = new Wall(5, "tile.wall.small_bricks");
+	public static final TileModel SANDSTONE_FLOOR = new Floor(6, "tile.floor.sandstone");
+	public static final TileModel SANDSTONE_WALL = new Wall(7, "tile.wall.sandstone");
+	public static final TileModel BRCOBBLE_FLOOR = new Floor(8, "tile.floor.brown_cobble");
+	public static final TileModel BRCOBBLE_WALL = new Wall(9, "tile.wall.brown_cobble");
+	public static final TileModel CRYSTAL_FLOOR = new Floor(10, "tile.floor.crystal");
+	public static final TileModel CRYSTAL_WALL = new Wall(11, "tile.wall.crystal");
 	
 	
 	static void register(int id, TileModel model)
 	{
-		if (id < 0 || id >= tiles.length) if (tiles[id] != null) {
+		if (id < 0 || id >= tiles.length) {
+			throw new IllegalArgumentException("Tile ID " + id + " is out of range.");
+		}
+		
+		if (tiles[id] != null) {
 			throw new IllegalArgumentException("Tile ID " + id + " already in use.");
 		}
 		

src/mightypork/rogue/world/tile/models/AbstractNullTile.java

@@ -1,24 +1,35 @@
 package mightypork.rogue.world.tile.models;
 
 
+import mightypork.rogue.world.map.TileRenderContext;
 import mightypork.rogue.world.tile.Tile;
 import mightypork.rogue.world.tile.TileModel;
-import mightypork.rogue.world.tile.TileRenderContext;
 
 
-public class NullTile extends TileModel {
+/**
+ * Null tile
+ * 
+ * @author MightyPork
+ */
+public abstract class AbstractNullTile extends TileModel {
 	
 	private Tile inst;
 	
 	
-	public NullTile(int id)
+	public AbstractNullTile(int id)
 	{
 		super(id);
 	}
 	
 	
 	@Override
-	public void render(Tile tile, TileRenderContext context)
+	public void render(TileRenderContext context)
+	{
+	}
+	
+	
+	@Override
+	public void update(Tile tile, double delta)
 	{
 	}
 	
@@ -26,14 +37,7 @@ public class NullTile extends TileModel {
 	@Override
 	public boolean isWalkable(Tile tile)
 	{
-		return false;
-	}
-	
-	
-	@Override
-	public boolean isPotentiallyWalkable()
-	{
-		return true;
+		return isPotentiallyWalkable();
 	}
 	
 	
@@ -45,7 +49,7 @@ public class NullTile extends TileModel {
 	
 	
 	@Override
-	public Tile create()
+	public Tile createTile()
 	{
 		if (inst == null) {
 			inst = new Tile(this);

src/mightypork/rogue/world/tile/models/NullFloor.java

@@ -0,0 +1,18 @@
+package mightypork.rogue.world.tile.models;
+
+
+public class NullFloor extends AbstractNullTile {
+	
+	public NullFloor(int id)
+	{
+		super(id);
+	}
+	
+	
+	@Override
+	public boolean isPotentiallyWalkable()
+	{
+		return true;
+	}
+	
+}

src/mightypork/rogue/world/tile/models/NullWall.java

@@ -0,0 +1,18 @@
+package mightypork.rogue.world.tile.models;
+
+
+public class NullWall extends AbstractNullTile {
+	
+	public NullWall(int id)
+	{
+		super(id);
+	}
+	
+	
+	@Override
+	public boolean isPotentiallyWalkable()
+	{
+		return false;
+	}
+	
+}

src/mightypork/rogue/world/tile/models/SimpleTile.java

@@ -1,13 +1,16 @@
 package mightypork.rogue.world.tile.models;
 
 
+import mightypork.gamecore.render.DisplaySystem;
 import mightypork.gamecore.render.Render;
 import mightypork.gamecore.render.textures.TxSheet;
 import mightypork.rogue.Res;
+import mightypork.rogue.world.map.TileRenderContext;
 import mightypork.rogue.world.tile.Tile;
 import mightypork.rogue.world.tile.TileModel;
-import mightypork.rogue.world.tile.TileRenderContext;
 import mightypork.util.annotations.DefaultImpl;
+import mightypork.util.constraints.vect.Vect;
+import mightypork.util.math.color.RGB;
 
 
 public abstract class SimpleTile extends TileModel {
@@ -23,11 +26,17 @@ public abstract class SimpleTile extends TileModel {
 	
 	
 	@Override
-	public void render(Tile tile, TileRenderContext context)
+	public void render(TileRenderContext context)
 	{
 		Render.quadTextured(context.getRect(), sheet.getRandomQuad(context.getTileNoise()));
 	}
 	
+	@Override
+	@DefaultImpl
+	public void update(Tile tile, double delta)
+	{
+	}
+	
 	
 	@Override
 	@DefaultImpl

src/mightypork/test/testworldtofile.java

@@ -0,0 +1,6 @@
+package mightypork.test;
+
+
+public class testworldtofile {
+	
+}

src/mightypork/util/constraints/rect/Rect.java

@@ -725,6 +725,69 @@ public abstract class Rect implements RectBound, Digestable<RectDigest> {
 			
 		};
 	}
+
+	
+	
+	/**
+	 * Round coords down
+	 * 
+	 * @return result
+	 */
+	public Rect floor()
+	{
+		
+		return new Rect() {
+			
+			private final Rect t = Rect.this;
+			
+			
+			@Override
+			public Vect size()
+			{
+				return t.size().floor();
+			}
+			
+			
+			@Override
+			public Vect origin()
+			{
+				return t.origin().floor();
+			}
+			
+		};
+	}
+
+	
+	
+	/**
+	 * Round coords up
+	 * 
+	 * @return result
+	 */
+	public Rect ceil()
+	{
+		
+		return new Rect() {
+			
+			private final Rect t = Rect.this;
+			
+			
+			@Override
+			public Vect size()
+			{
+				return t.size().ceil();
+			}
+			
+			
+			@Override
+			public Vect origin()
+			{
+				return t.origin().ceil();
+			}
+			
+		};
+	}
+	
 	
 	
 	public Num x()
@@ -985,4 +1048,5 @@ public abstract class Rect implements RectBound, Digestable<RectDigest> {
 		//      overflow || intersect
 		return ((rw < rx || rw > tx) && (rh < ry || rh > ty) && (tw < tx || tw > rx) && (th < ty || th > ry));
 	}
+
 }

src/mightypork/util/constraints/rect/RectConst.java

@@ -36,6 +36,8 @@ public class RectConst extends Rect {
 	private RectConst v_edge_t;
 	private RectConst v_edge_b;
 	private RectDigest digest;
+	private RectConst v_floor;
+	private RectConst v_ceil;
 	
 	
 	/**
@@ -152,6 +154,20 @@ public class RectConst extends Rect {
 	}
 	
 	
+	@Override
+	public RectConst floor()
+	{
+		return (v_floor != null) ? v_floor : (v_floor = Rect.make(pos.floor(), size.floor()));
+	}
+	
+	
+	@Override
+	public RectConst ceil()
+	{
+		return (v_ceil != null) ? v_ceil : (v_ceil = Rect.make(pos.ceil(), size.ceil()));
+	}
+	
+	
 	@Override
 	public NumConst x()
 	{

src/mightypork/util/error/CorruptedDataException.java

@@ -0,0 +1,36 @@
+package mightypork.util.error;
+
+import java.io.IOException;
+
+
+/**
+ * To be used when a data could not be read successfully.
+ * 
+ * @author MightyPork
+ */
+public class CorruptedDataException extends IOException {
+	
+	public CorruptedDataException()
+	{
+		super();
+	}
+	
+	
+	public CorruptedDataException(String message, Throwable cause)
+	{
+		super(message, cause);
+	}
+	
+	
+	public CorruptedDataException(String message)
+	{
+		super(message);
+	}
+	
+	
+	public CorruptedDataException(Throwable cause)
+	{
+		super(cause);
+	}
+	
+}

src/mightypork/util/files/ion/Ion.java

@@ -6,6 +6,7 @@ import java.nio.ByteBuffer;
 import java.util.*;
 import java.util.Map.Entry;
 
+import mightypork.util.error.CorruptedDataException;
 import mightypork.util.logging.Log;
 
 
@@ -83,7 +84,7 @@ public class Ion {
 	static final short DATA_LIST = 81;
 	
 	/** Ionizables<Mark, Class> */
-	private static Map<Short, Class<?>> customIonizables = new HashMap<>();
+	private static Map<Short, Class<? extends Ionizable>> customIonizables = new HashMap<>();
 	
 	// buffers and helper arrays for storing to streams.
 	private static ByteBuffer bi = ByteBuffer.allocate(Integer.SIZE / 8);
@@ -122,7 +123,7 @@ public class Ion {
 	 *            except
 	 * @param objClass class of the registered Ionizable
 	 */
-	public static void registerIonizable(int mark, Class<?> objClass)
+	public static void registerIonizable(int mark, Class<? extends Ionizable> objClass)
 	{
 		// negative marks are allowed.
 		if (mark > Short.MAX_VALUE) throw new IllegalArgumentException("Mark too high (max " + Short.MAX_VALUE + ").");
@@ -147,9 +148,9 @@ public class Ion {
 	 * 
 	 * @param path file path
 	 * @return the loaded object
-	 * @throws IOException on failure
+	 * @throws CorruptedDataException
 	 */
-	public static Object fromFile(String path) throws IOException
+	public static Object fromFile(String path) throws CorruptedDataException
 	{
 		return fromFile(new File(path));
 	}
@@ -160,9 +161,9 @@ public class Ion {
 	 * 
 	 * @param file file
 	 * @return the loaded object
-	 * @throws IOException on failure
+	 * @throws CorruptedDataException
 	 */
-	public static Object fromFile(File file) throws IOException
+	public static Object fromFile(File file) throws CorruptedDataException
 	{
 		try(InputStream in = new FileInputStream(file)) {
 			
@@ -170,7 +171,7 @@ public class Ion {
 			return obj;
 			
 		} catch (final IOException e) {
-			throw new IOException("Error loading ION file.", e);
+			throw new CorruptedDataException("Error loading ION file.", e);
 		}
 	}
 	
@@ -257,7 +258,7 @@ public class Ion {
 				loaded = ((Ionizable) clz.newInstance());
 				
 			} catch (InstantiationException | IllegalAccessException e) {
-				throw new IOException("Cound not instantiate: " + Log.str(customIonizables.get(mark)), e);
+				throw new RuntimeException("Cound not instantiate: " + Log.str(customIonizables.get(mark)), e);
 			}
 			
 			loaded.load(in);
@@ -370,14 +371,14 @@ public class Ion {
 				return Strings;
 				
 			default:
-				throw new IOException("Invalid Ion mark: " + mark);
+				throw new CorruptedDataException("Invalid Ion mark: " + mark);
 		}
 	}
 	
 	
 	public static void expect(InputStream in, short mark) throws IOException
 	{
-		if (readMark(in) != mark) throw new IOException("Unexpected mark in ION stream.");
+		if (readMark(in) != mark) throw new CorruptedDataException("Unexpected mark in ION stream.");
 	}
 	
 	
@@ -403,7 +404,20 @@ public class Ion {
 	public static void writeObject(OutputStream out, Object obj) throws IOException
 	{
 		if (obj instanceof Ionizable) {
-			writeMark(out, ((Ionizable) obj).getIonMark());
+			
+			short mark = ((Ionizable) obj).getIonMark();
+			
+			Class<? extends Ionizable> clzRegistered = customIonizables.get(mark);
+			
+			if (clzRegistered == null) {
+				throw new IOException("Ionizable object not registered: " + Log.str(obj.getClass()));
+			}
+			
+			if (clzRegistered != obj.getClass()) {
+				throw new IOException("Registered class does not match actual one for " + Log.str(obj.getClass()));
+			}
+			
+			writeMark(out, mark);
 			((Ionizable) obj).save(out);
 			return;
 		}
@@ -1172,12 +1186,12 @@ public class Ion {
 		if (mark == ENTRY) return true;
 		if (mark == END) return false;
 		
-		throw new IOException("Unexpected mark encountered while reading sequence.");
+		throw new CorruptedDataException("Unexpected mark " + mark + " encountered in sequence, expected " + ENTRY + " or " + END);
 	}
 	
 	
 	/**
-	 * Read a sequence of elements
+	 * Read a sequence of elements into an ArrayList
 	 * 
 	 * @param in input stream
 	 * @return the collection
@@ -1185,12 +1199,12 @@ public class Ion {
 	 */
 	public static <T> Collection<T> readSequence(InputStream in) throws IOException
 	{
-		return readSequence(in, new LinkedList<T>());
+		return readSequence(in, new ArrayList<T>());
 	}
 	
 	
 	/**
-	 * Load entries into a collection
+	 * Load entries into a collection. The collection is cleaned first.
 	 * 
 	 * @param in input stream
 	 * @param filled collection to populate
@@ -1201,12 +1215,13 @@ public class Ion {
 	public static <T> Collection<T> readSequence(InputStream in, Collection<T> filled) throws IOException
 	{
 		try {
+			filled.clear();
 			while (hasNextEntry(in)) {
 				filled.add((T) readObject(in));
 			}
 			return filled;
 		} catch (final ClassCastException e) {
-			throw new IOException("Unexpected element type.");
+			throw new CorruptedDataException("Unexpected element type.", e);
 		}
 	}
 	
@@ -1229,7 +1244,7 @@ public class Ion {
 	
 	
 	/**
-	 * Read a map of elements
+	 * Read element pairs into a HashMap
 	 * 
 	 * @param in input stream
 	 * @return the map
@@ -1237,12 +1252,12 @@ public class Ion {
 	 */
 	public static <K, V> Map<K, V> readMap(InputStream in) throws IOException
 	{
-		return readMap(in, new LinkedHashMap<K, V>());
+		return readMap(in, new HashMap<K, V>());
 	}
 	
 	
 	/**
-	 * Load data into a map
+	 * Load data into a map. The map is cleaned first.
 	 * 
 	 * @param in input stream
 	 * @param filled filled map
@@ -1253,6 +1268,7 @@ public class Ion {
 	public static <K, V> Map<K, V> readMap(InputStream in, Map<K, V> filled) throws IOException
 	{
 		try {
+			filled.clear();
 			while (hasNextEntry(in)) {
 				final K key = (K) readObject(in);
 				final V value = (V) readObject(in);
@@ -1261,7 +1277,7 @@ public class Ion {
 			}
 			return filled;
 		} catch (final ClassCastException e) {
-			throw new IOException("Unexpected element type.");
+			throw new CorruptedDataException("Unexpected element type.", e);
 		}
 	}
 	

src/mightypork/util/files/ion/IonBundle.java

@@ -1,18 +1,21 @@
 package mightypork.util.files.ion;
 
-
-import java.io.IOException;
-import java.io.InputStream;
-import java.io.OutputStream;
-import java.util.LinkedHashMap;
+import mightypork.util.files.ion.templates.IonizableHashMap;
 
 
 /**
+ * <p>
  * Data bundle.
+ * </p>
+ * <p>
+ * Storing data in a bundle guarantees that future versions will be compatible
+ * with the older format. Reading using default values ensures that you will get
+ * some value even if it was not saved in the file.
+ * </p>
  * 
  * @author MightyPork
  */
-public class IonBundle extends LinkedHashMap<String, Object> implements Ionizable {
+public class IonBundle extends IonizableHashMap<String, Object> {
 	
 	/**
 	 * Get an object. If not found, fallback is returned.
@@ -51,19 +54,4 @@ public class IonBundle extends LinkedHashMap<String, Object> implements Ionizabl
 		return Ion.DATA_BUNDLE;
 	}
 	
-	
-	@Override
-	public void load(InputStream in) throws IOException
-	{
-		clear();
-		Ion.readMap(in, this);
-	}
-	
-	
-	@Override
-	public void save(OutputStream out) throws IOException
-	{
-		Ion.writeMap(out, this);
-	}
-	
 }

src/mightypork/util/files/ion/IonConstructor.java

@@ -9,8 +9,17 @@ import java.lang.annotation.Target;
 
 
 /**
+ * <p>
  * Implicit constructor marked like this is intended to be solely used for ION
- * de-serialization. This is a description annotation and has no other function.
+ * de-serialization.
+ * </p>
+ * <p>
+ * Constructors marked like this should create a functional instance with
+ * default values.
+ * </p>
+ * <p>
+ * This is a descriptive annotation and has no other function.
+ * </p>
  * 
  * @author MightyPork
  */

src/mightypork/util/files/ion/templates/IonizableArrayList.java

@@ -0,0 +1,28 @@
+package mightypork.util.files.ion.templates;
+
+
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.OutputStream;
+import java.util.ArrayList;
+
+import mightypork.util.files.ion.Ion;
+import mightypork.util.files.ion.Ionizable;
+
+
+public abstract class IonizableArrayList<E> extends ArrayList<E> implements Ionizable {
+	
+	@Override
+	public void load(InputStream in) throws IOException
+	{
+		Ion.readSequence(in, this);
+	}
+	
+	
+	@Override
+	public void save(OutputStream out) throws IOException
+	{
+		Ion.writeSequence(out, this);
+	}
+	
+}

src/mightypork/util/files/ion/templates/IonizableHashMap.java

@@ -0,0 +1,28 @@
+package mightypork.util.files.ion.templates;
+
+
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.OutputStream;
+import java.util.HashMap;
+
+import mightypork.util.files.ion.Ion;
+import mightypork.util.files.ion.Ionizable;
+
+
+public abstract class IonizableHashMap<K, V> extends HashMap<K, V> implements Ionizable {
+	
+	@Override
+	public void load(InputStream in) throws IOException
+	{
+		Ion.readMap(in, this);
+	}
+	
+	
+	@Override
+	public void save(OutputStream out) throws IOException
+	{
+		Ion.writeMap(out, this);
+	}
+	
+}

src/mightypork/util/files/ion/templates/IonizableHashSet.java

@@ -0,0 +1,28 @@
+package mightypork.util.files.ion.templates;
+
+
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.OutputStream;
+import java.util.HashSet;
+
+import mightypork.util.files.ion.Ion;
+import mightypork.util.files.ion.Ionizable;
+
+
+public abstract class IonizableHashSet<E> extends HashSet<E> implements Ionizable {
+	
+	@Override
+	public void load(InputStream in) throws IOException
+	{
+		Ion.readSequence(in, this);
+	}
+	
+	
+	@Override
+	public void save(OutputStream out) throws IOException
+	{
+		Ion.writeSequence(out, this);
+	}
+	
+}

src/mightypork/util/files/ion/templates/IonizableLinkedHashMap.java

@@ -0,0 +1,28 @@
+package mightypork.util.files.ion.templates;
+
+
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.OutputStream;
+import java.util.LinkedHashMap;
+
+import mightypork.util.files.ion.Ion;
+import mightypork.util.files.ion.Ionizable;
+
+
+public abstract class IonizableLinkedHashMap<K, V> extends LinkedHashMap<K, V> implements Ionizable {
+	
+	@Override
+	public void load(InputStream in) throws IOException
+	{
+		Ion.readMap(in, this);
+	}
+	
+	
+	@Override
+	public void save(OutputStream out) throws IOException
+	{
+		Ion.writeMap(out, this);
+	}
+	
+}

src/mightypork/util/files/ion/templates/IonizableLinkedList.java

@@ -0,0 +1,28 @@
+package mightypork.util.files.ion.templates;
+
+
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.OutputStream;
+import java.util.LinkedList;
+
+import mightypork.util.files.ion.Ion;
+import mightypork.util.files.ion.Ionizable;
+
+
+public abstract class IonizableLinkedList<E> extends LinkedList<E> implements Ionizable {
+	
+	@Override
+	public void load(InputStream in) throws IOException
+	{
+		Ion.readSequence(in, this);
+	}
+	
+	
+	@Override
+	public void save(OutputStream out) throws IOException
+	{
+		Ion.writeSequence(out, this);
+	}
+	
+}

src/mightypork/util/files/ion/templates/IonizableStack.java

@@ -1,4 +1,4 @@
-package mightypork.rogue.world.tile;
+package mightypork.util.files.ion.templates;
 
 
 import java.io.IOException;
@@ -6,15 +6,11 @@ import java.io.InputStream;
 import java.io.OutputStream;
 import java.util.Stack;
 
-import mightypork.rogue.world.item.Item;
 import mightypork.util.files.ion.Ion;
 import mightypork.util.files.ion.Ionizable;
 
 
-public class TileItems extends Stack<Item> implements Ionizable {
-	
-	public static final short ION_MARK = 703;
-	
+public abstract class IonizableStack<E> extends Stack<E> implements Ionizable {
 	
 	@Override
 	public void load(InputStream in) throws IOException
@@ -29,11 +25,4 @@ public class TileItems extends Stack<Item> implements Ionizable {
 		Ion.writeSequence(out, this);
 	}
 	
-	
-	@Override
-	public short getIonMark()
-	{
-		return ION_MARK;
-	}
-	
 }

src/mightypork/util/files/ion/templates/IonizableTreeSet.java

@@ -0,0 +1,28 @@
+package mightypork.util.files.ion.templates;
+
+
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.OutputStream;
+import java.util.TreeSet;
+
+import mightypork.util.files.ion.Ion;
+import mightypork.util.files.ion.Ionizable;
+
+
+public abstract class IonizableTreeSet<E> extends TreeSet<E> implements Ionizable {
+	
+	@Override
+	public void load(InputStream in) throws IOException
+	{
+		Ion.readSequence(in, this);
+	}
+	
+	
+	@Override
+	public void save(OutputStream out) throws IOException
+	{
+		Ion.writeSequence(out, this);
+	}
+	
+}

src/mightypork/util/math/color/RGB.java

@@ -23,4 +23,6 @@ public interface RGB {
 	
 	Color PINK = Color.fromHex(0xFF3FFC);
 	Color ORANGE = Color.fromHex(0xFC4800);
+	
+	Color NONE = Color.NONE;
 }