9 files changed, 34 insertions, 22 deletions
diff --git a/core/src/ch/asynk/tankontank/game/Map.java b/core/src/ch/asynk/tankontank/engine/Map.java
index d410502..75aedd9 100644
--- a/core/src/ch/asynk/tankontank/game/Map.java
+++ b/core/src/ch/asynk/tankontank/engine/Map.java
@@ -1,4 +1,4 @@
-package ch.asynk.tankontank.game;
+package ch.asynk.tankontank.engine;
 
 import com.badlogic.gdx.math.Vector2;
 import com.badlogic.gdx.math.Vector3;
@@ -31,13 +31,13 @@ public interface Map
     {
         public int cols;
         public int rows;
-        public int x0 = 83;       // map offset
-        public int y0 = 182;      // map offset
-        public int h = 110;       // hex side
-        public float dh = 53.6f;  // hex top     should be h/2
-        public int w = 189;       // hex width
-        public int dw = 94;       // half hex    should be w/2
-        public float H = h + dh;  // total height
-        public float slope = (dh / (float) dw);
+        public int x0;          // bottom left x offset
+        public int y0;          // bottom left y offset
+        public int w;           // hex width
+        public int dw;          // half hex : w/2
+        public int h;           // hex side
+        public float dh;        // hex top : h/2
+        public float H;         // square height : h + dh
+        public float slope;     // north-west side slope : (dh / (float) dw)
     }
 }
diff --git a/core/src/ch/asynk/tankontank/game/MapImage.java b/core/src/ch/asynk/tankontank/engine/MapImage.java
index 2bb330d..07ab9cf 100644
--- a/core/src/ch/asynk/tankontank/game/MapImage.java
+++ b/core/src/ch/asynk/tankontank/engine/MapImage.java
@@ -1,4 +1,4 @@
-package ch.asynk.tankontank.game;
+package ch.asynk.tankontank.engine;
 
 import com.badlogic.gdx.Gdx;
 
diff --git a/core/src/ch/asynk/tankontank/game/Pawn.java b/core/src/ch/asynk/tankontank/engine/Pawn.java
index 8bbdec4..969e1e9 100644
--- a/core/src/ch/asynk/tankontank/game/Pawn.java
+++ b/core/src/ch/asynk/tankontank/engine/Pawn.java
@@ -1,4 +1,4 @@
-package ch.asynk.tankontank.game;
+package ch.asynk.tankontank.engine;
 
 import com.badlogic.gdx.math.Vector3;
 
diff --git a/core/src/ch/asynk/tankontank/game/PawnImage.java b/core/src/ch/asynk/tankontank/engine/PawnImage.java
index d8b6d56..77ef752 100644
--- a/core/src/ch/asynk/tankontank/game/PawnImage.java
+++ b/core/src/ch/asynk/tankontank/engine/PawnImage.java
@@ -1,4 +1,4 @@
-package ch.asynk.tankontank.game;
+package ch.asynk.tankontank.engine;
 
 import java.util.ArrayDeque;
 
diff --git a/core/src/ch/asynk/tankontank/game/Tile.java b/core/src/ch/asynk/tankontank/engine/Tile.java
index a52e728..eaaaf24 100644
--- a/core/src/ch/asynk/tankontank/game/Tile.java
+++ b/core/src/ch/asynk/tankontank/engine/Tile.java
@@ -1,4 +1,6 @@
-package ch.asynk.tankontank.game;
+package ch.asynk.tankontank.engine;
+
+import java.util.List;
 
 public interface Tile
 {
@@ -8,6 +10,8 @@ public interface Tile
 
     public Pawn getTop();
 
+    public int costFrom(Side side);
+
     public enum Orientation
     {
         KEEP(0),
diff --git a/core/src/ch/asynk/tankontank/game/GameFactory.java b/core/src/ch/asynk/tankontank/game/GameFactory.java
index 961a39a..3b77f1a 100644
--- a/core/src/ch/asynk/tankontank/game/GameFactory.java
+++ b/core/src/ch/asynk/tankontank/game/GameFactory.java
@@ -5,6 +5,10 @@ import com.badlogic.gdx.graphics.Texture;
 import com.badlogic.gdx.graphics.g2d.TextureAtlas;
 import com.badlogic.gdx.graphics.g2d.TextureRegion;
 
+import ch.asynk.tankontank.engine.Map;
+import ch.asynk.tankontank.engine.MapImage;
+import ch.asynk.tankontank.engine.Tile;
+
 public class GameFactory
 {
     private static TextureAtlas usAtlas;
diff --git a/core/src/ch/asynk/tankontank/game/Hex.java b/core/src/ch/asynk/tankontank/game/Hex.java
index e3889f9..1222363 100644
--- a/core/src/ch/asynk/tankontank/game/Hex.java
+++ b/core/src/ch/asynk/tankontank/game/Hex.java
@@ -2,6 +2,9 @@ package ch.asynk.tankontank.game;
 
 import java.util.ArrayDeque;
 
+import ch.asynk.tankontank.engine.Tile;
+import ch.asynk.tankontank.engine.Pawn;
+
 public class Hex implements Tile
 {
     public enum Terrain
diff --git a/core/src/ch/asynk/tankontank/game/Unit.java b/core/src/ch/asynk/tankontank/game/Unit.java
index 965ed47..61833eb 100644
--- a/core/src/ch/asynk/tankontank/game/Unit.java
+++ b/core/src/ch/asynk/tankontank/game/Unit.java
@@ -2,6 +2,8 @@ package ch.asynk.tankontank.game;
 
 import com.badlogic.gdx.graphics.g2d.TextureRegion;
 
+import ch.asynk.tankontank.engine.PawnImage;
+
 public class Unit extends PawnImage
 {
     public int rng;
diff --git a/core/src/ch/asynk/tankontank/screens/GameScreen.java b/core/src/ch/asynk/tankontank/screens/GameScreen.java
index 1dde462..765fae2 100644
--- a/core/src/ch/asynk/tankontank/screens/GameScreen.java
+++ b/core/src/ch/asynk/tankontank/screens/GameScreen.java
@@ -30,13 +30,12 @@ import ch.asynk.tankontank.TankOnTank;
 import ch.asynk.tankontank.game.GameFactory;
 import ch.asynk.tankontank.game.GameFactory.UnitType;
 
-// interfaces
-import ch.asynk.tankontank.game.Map;
-import ch.asynk.tankontank.game.Tile;
-import ch.asynk.tankontank.game.Pawn;
+import ch.asynk.tankontank.engine.Map;
+import ch.asynk.tankontank.engine.Tile;
+import ch.asynk.tankontank.engine.Pawn;
 
-import ch.asynk.tankontank.game.MapImage;   // addActor
-import ch.asynk.tankontank.game.Unit;       // addActor
+import ch.asynk.tankontank.engine.PawnImage;    // addActor
+import ch.asynk.tankontank.engine.MapImage;     // addActor
 
 public class GameScreen implements Screen
 {
@@ -113,9 +112,9 @@ public class GameScreen implements Screen
 
     private void addUnit(Stage stage, UnitType t, int col, int row, Tile.Orientation o)
     {
-        Unit u = GameFactory.getUnit(t);
-        map.setPawnAt((Pawn) u, col, row, o);
-        stage.addActor(u);
+        PawnImage p = GameFactory.getUnit(t);
+        map.setPawnAt(p, col, row, o);
+        stage.addActor(p);
     }
 
     private InputMultiplexer getMultiplexer()