From 6809c19db45d5cdb40ce28c52a8a86d94f890473 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?J=C3=A9r=C3=A9my=20Zurcher?= <jeremy@asynk.ch>
Date: Fri, 3 Oct 2014 01:58:54 +0200
Subject: Board,SearchBoard: add getFinalPath(getFinalPath(Vector<GridPoint3>
 path)

---
 core/src/ch/asynk/tankontank/engine/Board.java     | 50 ++++++++++++++++++++++
 .../ch/asynk/tankontank/engine/SearchBoard.java    |  4 ++
 2 files changed, 54 insertions(+)

diff --git a/core/src/ch/asynk/tankontank/engine/Board.java b/core/src/ch/asynk/tankontank/engine/Board.java
index d754883..9b05b9f 100644
--- a/core/src/ch/asynk/tankontank/engine/Board.java
+++ b/core/src/ch/asynk/tankontank/engine/Board.java
@@ -18,6 +18,7 @@ import com.badlogic.gdx.utils.Pool;
 import com.badlogic.gdx.math.Vector2;
 import com.badlogic.gdx.math.Vector3;
 import com.badlogic.gdx.math.GridPoint2;
+import com.badlogic.gdx.math.GridPoint3;
 import com.badlogic.gdx.math.Matrix4;
 
 import ch.asynk.tankontank.engine.gfx.Image;
@@ -134,6 +135,13 @@ public abstract class Board implements Disposable
         }
     };
 
+    private final Pool<GridPoint3> gridPoint3Pool = new Pool<GridPoint3>() {
+        @Override
+        protected GridPoint3 newObject() {
+            return new GridPoint3();
+        }
+    };
+
     protected Config cfg;
     private Tile[] tiles;
     protected SearchBoard searchBoard;
@@ -393,6 +401,48 @@ public abstract class Board implements Disposable
         return nodesToSet(paths, points);
     }
 
+    private Orientation getOrientation(SearchBoard.Node from, SearchBoard.Node to)
+    {
+        int dx = to.col - from .col;
+        int dy = to.row - from.row;
+
+        if (dy == 0) {
+            if (dx > 0) return Orientation.NORTH;
+            return Orientation.SOUTH;
+        }
+        if (dy > 0) {
+            if (dx > 0) return Orientation.NORTH_WEST;
+            return Orientation.SOUTH_WEST;
+        } else {
+            if (dx > 0) return Orientation.NORTH_EAST;
+            return Orientation.SOUTH_EAST;
+        }
+    }
+
+    public int getFinalPath(Vector<GridPoint3> path)
+    {
+        List<Vector<SearchBoard.Node>> paths = searchBoard.possiblePaths();
+
+        for (GridPoint3 v : path)
+            gridPoint3Pool.free(v);
+        path.clear();
+
+        if (paths.size() != 1)
+            return 0;
+
+        Vector<SearchBoard.Node> nodes = paths.get(0);
+        SearchBoard.Node prev = nodes.get(nodes.size() - 1);
+        for (int i = (nodes.size() - 2); i >= 0; i--) {
+            SearchBoard.Node node = nodes.get(i);
+            GridPoint3 point = gridPoint3Pool.obtain();
+            point.set(node.col, node.row, getOrientation(prev, node).r);
+            path.add(point);
+            prev = node;
+        }
+
+        return path.size();
+    }
+
     public boolean hasUnits(GridPoint2 hex)
     {
         return getTile(hex.x, hex.y).hasUnits();
diff --git a/core/src/ch/asynk/tankontank/engine/SearchBoard.java b/core/src/ch/asynk/tankontank/engine/SearchBoard.java
index 6b5ef26..0fd21e1 100644
--- a/core/src/ch/asynk/tankontank/engine/SearchBoard.java
+++ b/core/src/ch/asynk/tankontank/engine/SearchBoard.java
@@ -504,7 +504,11 @@ public class SearchBoard
             possiblePathsFilters.remove(n);
         else
             possiblePathsFilters.add(n);
+        return possiblePaths();
+    }
 
+    public List<Vector<Node>> possiblePaths()
+    {
         int s = possiblePathsFilters.size();
 
         List<Vector<Node>> paths = new LinkedList<Vector<Node>>();
-- 
cgit v1.1-2-g2b99