From 7a1a3025b664c861016e8178331ce246aed08e8a Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?J=C3=A9r=C3=A9my=20Zurcher?= <jeremy@asynk.ch>
Date: Thu, 25 Sep 2014 11:14:05 +0200
Subject: Board.Orientation: getBackSides(), oppositeSide(), left(), right()

---
 core/src/ch/asynk/tankontank/engine/Board.java | 57 ++++++++++++++++++++++++--
 1 file changed, 54 insertions(+), 3 deletions(-)

diff --git a/core/src/ch/asynk/tankontank/engine/Board.java b/core/src/ch/asynk/tankontank/engine/Board.java
index 20bf494..6236478 100644
--- a/core/src/ch/asynk/tankontank/engine/Board.java
+++ b/core/src/ch/asynk/tankontank/engine/Board.java
@@ -29,20 +29,71 @@ public abstract class Board extends Image implements Disposable
     public enum Orientation
     {
         KEEP(0, 0),
-        NORTH(-90, 1),
-        NORTH_EAST(-150, 2),
+        NORTH(270, 1),
+        NORTH_EAST(210, 2),
         SOUTH_EAST(150, 4),
         SOUTH(90, 8),
         SOUTH_WEST (30, 16),
-        NORTH_WEST(-30, 32);
+        NORTH_WEST(330, 32);
 
         public static int offset = 0;
+        public static float delta = 5f;
         private final int r;
         public final int s;
 
         Orientation(int r, int s) { this.r = r; this.s = s; }
 
         public float r() { return offset + r; }
+
+        public Orientation left()
+        {
+            if (this == NORTH) return NORTH_WEST;
+            else return fromSide(s >> 1);
+        }
+
+        public Orientation right()
+        {
+            if (this == NORTH_WEST) return NORTH;
+            else return fromSide(s << 1);
+        }
+
+        public Orientation oppositeSide()
+        {
+            return left().left().left();
+        }
+
+        public int getFrontSides()
+        {
+            return s | left().s | right().s;
+        }
+
+        public int getBackSides()
+        {
+            return oppositeSide().getFrontSides();
+        }
+
+        public static Orientation fromSide(int s)
+        {
+            if (s == 1) return NORTH;
+            else if (s == NORTH_EAST.s) return NORTH_EAST;
+            else if (s == SOUTH_EAST.s) return SOUTH_EAST;
+            else if (s == SOUTH.s) return SOUTH;
+            else if (s == SOUTH_WEST.s) return SOUTH_WEST;
+            else if (s == NORTH_WEST.s) return NORTH_WEST;
+            else return KEEP;
+        }
+
+        public static Orientation fromRotation(float r)
+        {
+            if (r < 0) r += 360f;
+            if ((r > (NORTH.r - 5f)) && (r < (NORTH.r + 5f))) return NORTH;
+            else if ((r > (NORTH_EAST.r - delta)) && (r < (NORTH_EAST.r + delta))) return NORTH_EAST;
+            else if ((r > (SOUTH_EAST.r - delta)) && (r < (SOUTH_EAST.r + delta))) return SOUTH_EAST;
+            else if ((r > (SOUTH.r - delta)) && (r < (SOUTH.r + delta))) return SOUTH;
+            else if ((r > (SOUTH_WEST.r - delta)) && (r < (SOUTH_WEST.r + delta))) return SOUTH_WEST;
+            else if ((r > (NORTH_WEST.r - delta)) && (r < (NORTH_WEST.r + delta))) return NORTH_WEST;
+            else return KEEP;
+        }
     }
 
     public static class Config
-- 
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