From a842d134397747a0f72d2f70ca604c28784d05a3 Mon Sep 17 00:00:00 2001
From: Pacien TRAN-GIRARD
Date: Mon, 23 Nov 2015 12:01:02 +0100
Subject: Implement Clyde A.I.

---
 src/ch/epfl/maze/physical/GhostPredator.java | 11 ++++++-
 src/ch/epfl/maze/physical/pacman/Clyde.java  | 46 +++++++++++++++++++++++-----
 2 files changed, 49 insertions(+), 8 deletions(-)

(limited to 'src/ch/epfl/maze')

diff --git a/src/ch/epfl/maze/physical/GhostPredator.java b/src/ch/epfl/maze/physical/GhostPredator.java
index 44bb1f6..8188c00 100644
--- a/src/ch/epfl/maze/physical/GhostPredator.java
+++ b/src/ch/epfl/maze/physical/GhostPredator.java
@@ -187,6 +187,15 @@ abstract public class GhostPredator extends Predator {
         return this.move(bestPaths);
     }
 
+    /**
+     * Returns the current Mode.
+     *
+     * @return The current Mode
+     */
+    protected Mode getMode(Daedalus daedalus) {
+        return this.mode;
+    }
+
     /**
      * Returns the position to target according to the current Mode.
      *
@@ -194,7 +203,7 @@ abstract public class GhostPredator extends Predator {
      * @return The position to target
      */
     protected Vector2D getTargetPosition(Daedalus daedalus) {
-        switch (this.mode) {
+        switch (this.getMode(daedalus)) {
             case CHASE:
                 return this.getPreyTargetPosition(daedalus);
             case SCATTER:
diff --git a/src/ch/epfl/maze/physical/pacman/Clyde.java b/src/ch/epfl/maze/physical/pacman/Clyde.java
index 6b3bef3..7e8bdd7 100644
--- a/src/ch/epfl/maze/physical/pacman/Clyde.java
+++ b/src/ch/epfl/maze/physical/pacman/Clyde.java
@@ -3,35 +3,67 @@ package ch.epfl.maze.physical.pacman;
 import ch.epfl.maze.physical.Animal;
 import ch.epfl.maze.physical.Daedalus;
 import ch.epfl.maze.physical.GhostPredator;
-import ch.epfl.maze.util.Direction;
 import ch.epfl.maze.util.Vector2D;
 
 /**
  * Orange ghost from the Pac-Man game, alternates between direct chase if far
  * from its target and SCATTER if close.
+ *
+ * @author Pacien TRAN-GIRARD
  */
-
 public class Clyde extends GhostPredator {
 
+    private static double PROXIMITY_THRESHOLD = 4.0d;
+
     /**
      * Constructs a Clyde with a starting position.
      *
      * @param position Starting position of Clyde in the labyrinth
      */
-
     public Clyde(Vector2D position) {
         super(position);
-        // TODO
     }
 
+    /**
+     * Checks if Clyde is close to the targeted Prey.
+     *
+     * @param daedalus The Daedalus
+     * @return T(the Prey is reckless)
+     */
+    private boolean closeToTarget(Daedalus daedalus) {
+        double dist = this
+                .getPosition()
+                .sub(this.getPreyPosition(daedalus))
+                .dist();
+
+        return dist < Clyde.PROXIMITY_THRESHOLD;
+    }
+
+    /**
+     * Returns the current Mode, forcing the SCATTER Mode if far from the target.
+     *
+     * @param daedalus The Daedalus
+     * @return The current Mode
+     */
     @Override
-    public Direction move(Direction[] choices, Daedalus daedalus) {
-        // TODO
-        return Direction.NONE;
+    protected Mode getMode(Daedalus daedalus) {
+        return this.closeToTarget(daedalus) ? super.getMode(daedalus) : Mode.SCATTER;
+    }
+
+    /**
+     * Targets directly the current position of the Prey.
+     *
+     * @param daedalus The Daedalus
+     * @return The position of the Prey
+     */
+    @Override
+    protected Vector2D getPreyTargetPosition(Daedalus daedalus) {
+        return getPreyPosition(daedalus);
     }
 
     @Override
     public Animal copy() {
         return new Clyde(this.getPosition());
     }
+
 }
-- 
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