Adding Pieces positions

app/src/main/java/school_project/Map.java

@@ -1,19 +1,46 @@
 package school_project;
 
 import java.util.ArrayList;
+import java.util.Arrays;
 
 /**
  * Represent the map with its pieces.
  * Every piece has a position element that represent its position on the map
  */
 public class Map extends Shape{
-    private ArrayList<Piece> pieces;
+    private final ArrayList<Piece> pieces = new ArrayList<>();
 
     public Map(boolean[][] matrix) {
         super(matrix);
     }
 
     public void addPiece(Piece piece){
+        piece.setLinked_map(this);
         pieces.add(piece);
     }
+
+    /**
+     * Return a matrix with all used space on the map to see if a piece can fit in a space
+     *
+     * @return matrix of boolean with false being the not used space
+     */
+    public boolean[][] getUsedSpace(){
+
+        // Copy of the map to avoid side effect
+        boolean[][] used = new boolean[height][width];
+        for (int i = 0; i < height; i++) {
+            used[i] = Arrays.copyOf(matrix[i], width);
+        }
+
+        for (Piece p : pieces) {
+            for(int x = 0; x < p.height; x++){
+                for(int y = 0; y < p.width; y++){
+                    if (p.getShape()[x][y]){
+                        used[p.getPosition().x + x][p.getPosition().y + y] = false;
+                    }
+                }
+            }
+        }
+        return used;
+    }
 }

app/src/main/java/school_project/Piece.java

@@ -9,6 +9,7 @@ package school_project;
 public class Piece extends Shape{
 
     private Vec2 Position;
+    private Map linked_map;
 
     public Piece() {
         super();
@@ -22,7 +23,21 @@ public class Piece extends Shape{
         return Position;
     }
 
-    public void getPo
+    public void setPosition(Vec2 position){
+        if (linked_map == null) {
+            return;
+        }
+
+        this.Position = position;
+    }
+
+    /**
+     * set the map the piece is into the the map argument
+     * @param map map where to place the piece
+     */
+    public void setLinked_map(Map map){
+        this.linked_map = map;
+    }
 
     /**
      * Rotate the matrix of the piece. Used when the player right click

app/src/main/java/school_project/Shape.java

@@ -1,6 +1,10 @@
 package school_project;
 
 
+/**
+ * Base class for everything that is a shape kind, like map and pieces
+ * it contain a matrix of boolean where the shape is defined by the true's
+ */
 public class Shape {
 
     protected boolean[][] matrix;