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-rw-r--r--src/ch/epfl/maze/physical/World.java12
-rw-r--r--src/ch/epfl/maze/util/Direction.java10
2 files changed, 13 insertions, 9 deletions
diff --git a/src/ch/epfl/maze/physical/World.java b/src/ch/epfl/maze/physical/World.java
index 257fa65..9f4f155 100644
--- a/src/ch/epfl/maze/physical/World.java
+++ b/src/ch/epfl/maze/physical/World.java
@@ -7,6 +7,7 @@ import java.util.ArrayList;
7import java.util.EnumSet; 7import java.util.EnumSet;
8import java.util.List; 8import java.util.List;
9import java.util.Set; 9import java.util.Set;
10import java.util.stream.Collectors;
10 11
11/** 12/**
12 * World that is represented by a labyrinth of tiles in which an {@code Animal} 13 * World that is represented by a labyrinth of tiles in which an {@code Animal}
@@ -136,13 +137,12 @@ public abstract class World {
136 * @return A set of all available choices at a position 137 * @return A set of all available choices at a position
137 */ 138 */
138 public final Set<Direction> getChoiceSet(Vector2D position) { 139 public final Set<Direction> getChoiceSet(Vector2D position) {
139 Set<Direction> choices = EnumSet.noneOf(Direction.class); 140 Set<Direction> freeDirections = Direction.MOVING_DIRECTIONS
141 .stream()
142 .filter(dir -> this.isFree(position.addDirectionTo(dir)))
143 .collect(Collectors.toSet());
140 144
141 for (Direction dir : Direction.POSSIBLE_DIRECTIONS) 145 return freeDirections.isEmpty() ? EnumSet.of(Direction.NONE) : freeDirections;
142 if (this.isFree(position.addDirectionTo(dir)))
143 choices.add(dir);
144
145 return choices.isEmpty() ? EnumSet.of(Direction.NONE) : choices;
146 } 146 }
147 147
148 /** 148 /**
diff --git a/src/ch/epfl/maze/util/Direction.java b/src/ch/epfl/maze/util/Direction.java
index ac172cb..b3f2e9c 100644
--- a/src/ch/epfl/maze/util/Direction.java
+++ b/src/ch/epfl/maze/util/Direction.java
@@ -1,5 +1,9 @@
1package ch.epfl.maze.util; 1package ch.epfl.maze.util;
2 2
3import java.util.Collections;
4import java.util.EnumSet;
5import java.util.Set;
6
3/** 7/**
4 * Directions that an animal can take to move. They represent the four cardinal 8 * Directions that an animal can take to move. They represent the four cardinal
5 * points ({@code DOWN, UP, RIGHT, LEFT}) from the frame of reference of the 9 * points ({@code DOWN, UP, RIGHT, LEFT}) from the frame of reference of the
@@ -12,14 +16,14 @@ public enum Direction {
12 DOWN, UP, RIGHT, LEFT, NONE; 16 DOWN, UP, RIGHT, LEFT, NONE;
13 17
14 /** 18 /**
15 * An array of all the possible directions that can be taken. 19 * A set of all the possible directions that can be taken.
16 */ 20 */
17 public static final Direction[] POSSIBLE_DIRECTIONS = new Direction[]{ 21 public static final Set<Direction> MOVING_DIRECTIONS = Collections.unmodifiableSet(EnumSet.of(
18 Direction.DOWN, 22 Direction.DOWN,
19 Direction.UP, 23 Direction.UP,
20 Direction.RIGHT, 24 Direction.RIGHT,
21 Direction.LEFT 25 Direction.LEFT
22 }; 26 ));
23 27
24 /** 28 /**
25 * Returns the integer value of the direction 29 * Returns the integer value of the direction