From d3b9d0f40f23d9ae6439e733a7e41c0d0a2899c3 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?J=C3=A9r=C3=A9my=20Zurcher?= <jeremy@asynk.ch>
Date: Mon, 29 Sep 2014 23:51:20 +0200
Subject: add lineOfSight testing code

---
 core/src/ch/asynk/tankontank/engine/Board.java     | 24 +++++++++++++++++++++
 core/src/ch/asynk/tankontank/game/Map.java         | 25 ++++++++++++++++++++++
 .../ch/asynk/tankontank/screens/GameScreen.java    |  3 +++
 3 files changed, 52 insertions(+)

diff --git a/core/src/ch/asynk/tankontank/engine/Board.java b/core/src/ch/asynk/tankontank/engine/Board.java
index 440f38b..871f9e8 100644
--- a/core/src/ch/asynk/tankontank/engine/Board.java
+++ b/core/src/ch/asynk/tankontank/engine/Board.java
@@ -348,6 +348,25 @@ public abstract class Board implements Disposable
         return areaPoints;
     }
 
+    public List<GridPoint2> lineOfSight(int col0, int row0, int col1, int row1)
+    {
+        for (GridPoint2 p : areaPoints)
+            gridPoint2Pool.free(p);
+        areaPoints.clear();
+
+        for (SearchBoard.Node node : searchBoard.lineOfSight(col0, row0, col1, row1)) {
+            GridPoint2 point = gridPoint2Pool.obtain();
+            if (point != null) {
+                point.set(node.col, node.row);
+                areaPoints.add(point);
+            } else {
+                System.err.println("null point");
+            }
+        }
+
+        return areaPoints;
+    }
+
     public void disableOverlaysOn(int col, int row)
     {
         disableOverlaysOn(getTile(col, row));
@@ -413,6 +432,11 @@ public abstract class Board implements Disposable
         return n;
     }
 
+    public Vector2 getTileCenter(int col, int row)
+    {
+        return getTile(col, row).getCenter();
+    }
+
     public Vector2 getPawnPosAt(Pawn pawn, GridPoint2 tile)
     {
         return getPawnPosAt(pawn, tile.x, tile.y);
diff --git a/core/src/ch/asynk/tankontank/game/Map.java b/core/src/ch/asynk/tankontank/game/Map.java
index 0406b6d..5a5f5b0 100644
--- a/core/src/ch/asynk/tankontank/game/Map.java
+++ b/core/src/ch/asynk/tankontank/game/Map.java
@@ -2,7 +2,9 @@ package ch.asynk.tankontank.game;
 
 import com.badlogic.gdx.graphics.Texture;
 import com.badlogic.gdx.graphics.g2d.TextureAtlas;
+import com.badlogic.gdx.math.Vector2;
 import com.badlogic.gdx.math.GridPoint2;
+import com.badlogic.gdx.graphics.glutils.ShapeRenderer;
 
 import ch.asynk.tankontank.engine.Board;
 import ch.asynk.tankontank.engine.Pawn;
@@ -15,6 +17,9 @@ public abstract class Map extends Board
 
     private Pawn currentPawn;
     private GridPoint2 currentHex = new GridPoint2(-1, -1);
+    private GridPoint2 lineHex = new GridPoint2(-1, -1);
+    private Vector2 line0 = new Vector2(0, 0);
+    private Vector2 line1 = new Vector2(0, 0);
 
     protected abstract void setup();
 
@@ -42,6 +47,7 @@ public abstract class Map extends Board
         if (currentHex.x != -1) {
             currentPawn = removeTopPawnFrom(currentHex);
             if (currentPawn != null) pawnsToDraw.add(currentPawn);
+            line0 = getTileCenter(currentHex.x, currentHex.y);
         }
     }
 
@@ -71,6 +77,25 @@ public abstract class Map extends Board
             enableOverlayOn(hex.x, hex.y, Hex.RED, true);
     }
 
+    public void lineOfSight(float x, float y)
+    {
+        getHexAt(lineHex, x, y);
+        line1 = getTileCenter(lineHex.x, lineHex.y);
+
+        for(GridPoint2 hex : areaPoints)
+            enableOverlayOn(hex.x, hex.y, Hex.RED, false);
+
+        for(GridPoint2 hex : lineOfSight(currentHex.x, currentHex.y, lineHex.x, lineHex.y))
+            enableOverlayOn(hex.x, hex.y, Hex.RED, true);
+    }
+
+    @Override
+    public void drawDebug(ShapeRenderer debugShapes)
+    {
+        super.drawDebug(debugShapes);
+        debugShapes.line(line0.x, line0.y, line1.x, line1.y);
+    }
+
     private void debugMap()
     {
         int o = Hex.FOG;
diff --git a/core/src/ch/asynk/tankontank/screens/GameScreen.java b/core/src/ch/asynk/tankontank/screens/GameScreen.java
index 1f4e986..6a0c715 100644
--- a/core/src/ch/asynk/tankontank/screens/GameScreen.java
+++ b/core/src/ch/asynk/tankontank/screens/GameScreen.java
@@ -156,6 +156,9 @@ public class GameScreen implements Screen
                 } else if (button == Input.Buttons.RIGHT) {
                     cam.unproject(touchPos.set(x, y, 0));
                     map.showMoves(touchPos.x, touchPos.y);
+                } else {
+                    cam.unproject(touchPos.set(x, y, 0));
+                    map.lineOfSight(touchPos.x, touchPos.y);
                 }
                 return true;
             }
-- 
cgit v1.1-2-g2b99