diff --git a/NOTE.md b/NOTE.md
index 6387271..4de26d0 100644
--- a/NOTE.md
+++ b/NOTE.md
@@ -17,6 +17,7 @@ Bug :
    - (incertain) Dans de rare cas (souvent en fermant brutalement la fenêtre) le processus ne s'arrête pas
    - Quitter pendant que l'on décide de si l'on doit charger ou non une ancienne sauvegarde fait crash l'adversaire
    - Les champs invalides n'empêchent pas de faire l'action
+   - Si le port est déjà utilisé, le jeu n'indique par l'erreur à l'hote
 
 Autre :
     - Tester sur Linux
diff --git a/source/gui/position.py b/source/gui/position.py
deleted file mode 100644
index e71de9a..0000000
--- a/source/gui/position.py
+++ /dev/null
@@ -1,37 +0,0 @@
-from typing import Callable
-
-
-# pourcentage
-
-
-def w_percent(value: float) -> Callable:  # positionne en pourcentage la largeur
-    return lambda widget: int(widget.scene.window.width * (value / 100))
-
-
-def h_percent(value: float) -> Callable:  # positionne en pourcentage la hauteur
-    return lambda widget: int(widget.scene.window.height * (value / 100))
-
-
-# pixel
-
-
-def right(px: int) -> Callable:  # positionne depuis la droite
-    return lambda widget: widget.scene.window.width - px
-
-
-def up(px: int) -> Callable:  # positionne depuis le haut
-    return lambda widget: widget.scene.window.height - px
-
-
-def right_content(px: int) -> Callable:  # positionne depuis la droite avec la taille du widget compris
-    return lambda widget: widget.scene.window.width - widget.width - px
-
-
-def up_content(px: int) -> Callable:  # positionne depuis le haut avec la taille du widget compris
-    return lambda widget: widget.scene.window.height - widget.height - px
-
-
-# raccourci
-
-w_full = w_percent(100)
-h_full = h_percent(100)
diff --git a/source/gui/position/Unit.py b/source/gui/position/Unit.py
new file mode 100644
index 0000000..55eaf31
--- /dev/null
+++ b/source/gui/position/Unit.py
@@ -0,0 +1,29 @@
+from typing import Callable, TYPE_CHECKING
+
+from source.gui.position import Value
+from source.type import DistanceFunc
+
+if TYPE_CHECKING:
+    pass
+
+
+class Unit:
+    """
+    Cette classe représente une unité de position (px, vw, ...).
+    """
+
+    def __init__(self, converter: Callable[[float], DistanceFunc]):
+        self.converter = converter
+
+    def __mul__(self, other: float):  # opérateur *
+        """
+        Lorsque que cet object est multiplié avec une valeur, renvoie un objet Value
+        utilisant le convertisseur de l'unité.
+        :param other: l'autre élément utilisé dans la multiplication.
+        :return: l'objet Value
+        """
+
+        return Value(self.converter(other))
+
+    def __rmul__(self, other):  # opérateur *, lorsque cet objet est situé à droite de l'opération
+        return self.__mul__(other)
diff --git a/source/gui/position/Value.py b/source/gui/position/Value.py
new file mode 100644
index 0000000..5b6771d
--- /dev/null
+++ b/source/gui/position/Value.py
@@ -0,0 +1,47 @@
+from typing import TYPE_CHECKING
+
+from source.type import DistanceFunc
+
+if TYPE_CHECKING:
+    from source.gui.widget.abc import BoxWidget
+
+
+class Value:
+    """
+    Une valeur utilisée pour calculer la position des objets.
+    Elle utilise une fonction permettant à partir d'un widget, d'obtenir une position dans la fenêtre
+    """
+
+    def __init__(self, calc: DistanceFunc):
+        self.calc = calc  # fonction calculant la position depuis la taille d'un widget
+
+    def __add__(self, other) -> "Value":  # opérateur +
+        """
+        Créer un nouvel objet Value correspondant à l'addition des deux opérandes
+        :param other: l'autre élément utilisé dans la multiplication.
+        :return: le nouvel objet Value
+        """
+        return self.__class__(lambda widget: self.calc(widget) + other.calc(widget))
+
+    def __radd__(self, other):  # opérateur +, lorsque cet objet est situé à droite de l'opération
+        return self.__add__(other)
+
+    def __sub__(self, other) -> "Value":  # opérateur -
+        """
+        Créer un nouvel objet Value correspondant à la soustraction des deux opérandes
+        :param other: l'autre élément utilisé dans la multiplication.
+        :return: le nouvel objet Value
+        """
+        return self.__class__(lambda widget: self.calc(widget) - other.calc(widget))
+
+    def __rsub__(self, other):  # opérateur -, lorsque cet objet est situé à droite de l'opération
+        # similaire à __sub__, mais c'est cette valeur qui est soustraite à l'autre
+        return self.__class__(lambda widget: other.calc(widget) - self.calc(widget))
+
+    def __call__(self, widget: "BoxWidget") -> int:  # lorsque cet objet est appelé comme une fonction
+        """
+        Calcul pour le widget en paramètre la valeur associé.
+        :param widget: Le widget à utiliser pour les calculs
+        :return: la position correspondant à ce widget.
+        """
+        return self.calc(widget)
diff --git a/source/gui/position/__init__.py b/source/gui/position/__init__.py
new file mode 100644
index 0000000..f84efb2
--- /dev/null
+++ b/source/gui/position/__init__.py
@@ -0,0 +1,31 @@
+from .Value import Value
+from .Unit import Unit
+
+px = Unit(lambda value: (lambda widget: value))  # PiXel
+vw = Unit(lambda value: (lambda widget: int(widget.scene.window.width * (value / 100))))  # Viewport Width
+vh = Unit(lambda value: (lambda widget: int(widget.scene.window.height * (value / 100))))   # Viewport Height
+ww = Unit(lambda value: (lambda widget: int(widget.width * (value / 100))))  # Widget Width
+wh = Unit(lambda value: (lambda widget: int(widget.height * (value / 100))))  # Widget Height
+
+
+vw_full, vh_full = 100*vw, 100*vh
+vw_center, vh_center = 50*vw, 50*vh
+
+ww_full, wh_full = 100*ww, 100*wh
+ww_center, wh_center = 50*ww, 50*wh
+
+
+def real_right(value: Value) -> Value:  # positionne depuis la droite avec la taille du widget compris
+    return vw_full - value
+
+
+def real_top(value: Value) -> Value:  # positionne depuis le haut avec la taille du widget compris
+    return vh_full - value
+
+
+def right(value: Value) -> Value:  # positionne depuis la droite
+    return real_right(value) - ww_full
+
+
+def top(value: Value) -> Value:  # positionne depuis le haut
+    return real_top(value) - wh_full
diff --git a/source/gui/scene/Game.py b/source/gui/scene/Game.py
index 3e5a0e0..5d87bde 100644
--- a/source/gui/scene/Game.py
+++ b/source/gui/scene/Game.py
@@ -4,7 +4,7 @@ from datetime import datetime, timedelta
 from pathlib import Path
 from typing import TYPE_CHECKING, Optional
 
-from source.gui.position import w_percent, h_percent
+from source.gui.position import vw, vh
 from source.path import path_save, path_history
 from source.core.enums import BombState
 from source.core.error import InvalidBombPosition, PositionAlreadyShot
@@ -50,7 +50,7 @@ class Game(BaseGame):
         self.chat_log = self.add_widget(
             widget.Text,
 
-            x=10, y=45, width=w_percent(40),
+            x=10, y=45, width=40*vw,
 
             text="",
             anchor_x="left", anchor_y="bottom",
@@ -60,7 +60,7 @@ class Game(BaseGame):
         self.chat_input = self.add_widget(
             widget.Input,
 
-            x=10, y=10, width=w_percent(50), height=30,
+            x=10, y=10, width=50*vw, height=30,
 
             type_regex=".{0,60}",
 
@@ -79,7 +79,7 @@ class Game(BaseGame):
         self.button_save = self.add_widget(
             widget.Button,
 
-            x=w_percent(70), y=0, width=w_percent(15), height=h_percent(10),
+            x=70*vw, y=0, width=15*vw, height=10*vh,
 
             label_text="Sauvegarder",
 
@@ -104,7 +104,7 @@ class Game(BaseGame):
         self.label_state = self.add_widget(
             widget.Text,
 
-            x=w_percent(50), y=h_percent(15),
+            x=50*vw, y=15*vh,
 
             anchor_x="center",
 
diff --git a/source/gui/scene/GameError.py b/source/gui/scene/GameError.py
index f77588d..82c591a 100644
--- a/source/gui/scene/GameError.py
+++ b/source/gui/scene/GameError.py
@@ -1,7 +1,7 @@
 from typing import TYPE_CHECKING
 
 from source.gui import widget, texture
-from source.gui.position import w_full, h_percent, w_percent, right_content
+from source.gui.position import vw_full, vw_center, vh_center, right, px, vw, vh
 from source.gui.scene.abc import Scene
 
 
@@ -16,7 +16,7 @@ class GameError(Scene):
         self.label = self.add_widget(
             widget.Text,
 
-            x=w_percent(50), y=h_percent(50), width=w_full,
+            x=vw_center, y=vh_center, width=vw_full,
 
             anchor_x="center",
 
@@ -29,7 +29,7 @@ class GameError(Scene):
         self.back = self.add_widget(
             widget.Button,
 
-            x=right_content(20), y=20, width=w_percent(20), height=h_percent(10),
+            x=right(20*px), y=20, width=20*vw, height=10*vh,
 
             label_text="Retour",
 
diff --git a/source/gui/scene/GameLoad.py b/source/gui/scene/GameLoad.py
index 1c111ca..b19d7d4 100644
--- a/source/gui/scene/GameLoad.py
+++ b/source/gui/scene/GameLoad.py
@@ -2,7 +2,7 @@ from pathlib import Path
 from typing import TYPE_CHECKING
 
 from source.gui import widget, texture
-from source.gui.position import w_percent, w_full, h_percent, right_content
+from source.gui.position import vw_full, vw, vh, right, px, vw_center, vh_center
 from source.gui.scene.abc import Scene
 from source.network import Host
 from source.utils import path_ctime_str
@@ -20,7 +20,7 @@ class GameLoad(Scene):
         self.label = self.add_widget(
             widget.Text,
 
-            x=w_percent(50), y=h_percent(50), width=w_full,
+            x=vw_center, y=vh_center, width=vw_full,
 
             anchor_x="center",
 
@@ -35,7 +35,7 @@ class GameLoad(Scene):
         self.refuse = self.add_widget(
             widget.Button,
 
-            x=20, y=20, width=w_percent(20), height=h_percent(10),
+            x=20, y=20, width=20*vw, height=10*vh,
 
             label_text="Refuser",
 
@@ -47,7 +47,7 @@ class GameLoad(Scene):
         self.accept = self.add_widget(
             widget.Button,
 
-            x=right_content(20), y=20, width=w_percent(20), height=h_percent(10),
+            x=right(20*px), y=20, width=20*vw, height=10*vh,
 
             label_text="Accepter",
 
diff --git a/source/gui/scene/GameQuit.py b/source/gui/scene/GameQuit.py
index 0d80c30..ac6b990 100644
--- a/source/gui/scene/GameQuit.py
+++ b/source/gui/scene/GameQuit.py
@@ -1,7 +1,7 @@
 from typing import TYPE_CHECKING
 
 from source.gui import widget, texture
-from source.gui.position import w_full, h_full, w_percent, h_percent
+from source.gui.position import vw_full, vh_full, vh_center, vw_center, vw, vh
 from source.gui.scene.abc.Popup import Popup
 from source.network.packet import PacketQuit
 
@@ -19,7 +19,7 @@ class GameQuit(Popup):
         self.background = self.add_widget(
             widget.Image,
 
-            x=0, y=0, width=w_full, height=h_full,
+            x=0, y=0, width=vw_full, height=vh_full,
 
             image=texture.Popup.Style1.background
         )
@@ -27,7 +27,7 @@ class GameQuit(Popup):
         self.text = self.add_widget(
             widget.Text,
 
-            x=w_percent(50), y=h_percent(50), width=w_full,
+            x=vw_center, y=vh_center, width=vw_full,
 
             anchor_x="center",
 
@@ -39,7 +39,7 @@ class GameQuit(Popup):
 
         self.cancel = self.add_widget(
             widget.Button,
-            x=w_percent(20), y=h_percent(20), width=w_percent(20), height=h_percent(10),
+            x=20*vw, y=20*vh, width=20*vw, height=10*vh,
 
             label_text="Annuler",
 
@@ -50,7 +50,7 @@ class GameQuit(Popup):
 
         self.confirm = self.add_widget(
             widget.Button,
-            x=w_percent(60), y=h_percent(20), width=w_percent(20), height=h_percent(10),
+            x=60*vw, y=20*vh, width=20*vw, height=10*vh,
 
             label_text="Confirmer",
 
diff --git a/source/gui/scene/GameResult.py b/source/gui/scene/GameResult.py
index 901bc97..2e94953 100644
--- a/source/gui/scene/GameResult.py
+++ b/source/gui/scene/GameResult.py
@@ -3,7 +3,7 @@ from typing import TYPE_CHECKING
 import pyglet.clock
 
 from source.gui import texture, widget, sound
-from source.gui.position import w_full, h_full
+from source.gui.position import vw_full, vh_full
 from source.gui.scene.abc.Popup import Popup
 
 if TYPE_CHECKING:
@@ -20,7 +20,7 @@ class GameResult(Popup):
         self.image = self.add_widget(
             widget.Image,
 
-            x=0, y=0, width=w_full, height=h_full,
+            x=0, y=0, width=vw_full, height=vh_full,
             image=texture.Result.Style1.get("victory" if won else "defeat")
         )
 
diff --git a/source/gui/scene/GameSave.py b/source/gui/scene/GameSave.py
index 032a75a..5d75430 100644
--- a/source/gui/scene/GameSave.py
+++ b/source/gui/scene/GameSave.py
@@ -1,7 +1,7 @@
 from typing import TYPE_CHECKING
 
 from source.gui import widget, texture
-from source.gui.position import h_full, w_full, w_percent, h_percent
+from source.gui.position import vh_full, vw_full, vw, vh
 from source.gui.scene.abc.Popup import Popup
 from source.network.packet import PacketResponseSave
 
@@ -19,7 +19,7 @@ class GameSave(Popup):
         self.background = self.add_widget(
             widget.Image,
 
-            x=0, y=0, width=w_full, height=h_full,
+            x=0, y=0, width=vw_full, height=vh_full,
 
             image=texture.Popup.Style1.background
         )
@@ -27,7 +27,7 @@ class GameSave(Popup):
         self.text = self.add_widget(
             widget.Text,
 
-            x=w_percent(50), y=h_percent(50),
+            x=50*vw, y=50*vh,
 
             anchor_x="center",
 
@@ -38,7 +38,7 @@ class GameSave(Popup):
 
         self.refuse = self.add_widget(
             widget.Button,
-            x=w_percent(20), y=h_percent(20), width=w_percent(20), height=h_percent(10),
+            x=20*vw, y=20*vh, width=20*vw, height=10*vh,
 
             label_text="Refuser",
 
@@ -49,7 +49,7 @@ class GameSave(Popup):
 
         self.accept = self.add_widget(
             widget.Button,
-            x=w_percent(60), y=h_percent(20), width=w_percent(20), height=h_percent(10),
+            x=60*vw, y=20*vh, width=20*vw, height=10*vh,
 
             label_text="Accepter",
 
diff --git a/source/gui/scene/GameWaitLoad.py b/source/gui/scene/GameWaitLoad.py
index 0a02cd7..801097e 100644
--- a/source/gui/scene/GameWaitLoad.py
+++ b/source/gui/scene/GameWaitLoad.py
@@ -2,7 +2,7 @@ from pathlib import Path
 from typing import TYPE_CHECKING
 
 from source.gui import widget
-from source.gui.position import w_percent, h_percent, w_full
+from source.gui.position import vw_full, vh, vw
 from source.gui.scene.abc import Scene
 from source.utils import path_ctime_str
 
@@ -17,7 +17,7 @@ class GameWaitLoad(Scene):
         self.label = self.add_widget(
             widget.Text,
 
-            x=w_percent(50), y=h_percent(50), width=w_full,
+            x=50*vw, y=50*vh, width=vw_full,
 
             anchor_x="center",
 
diff --git a/source/gui/scene/HistoryGame.py b/source/gui/scene/HistoryGame.py
index 9d2c601..bf165bf 100644
--- a/source/gui/scene/HistoryGame.py
+++ b/source/gui/scene/HistoryGame.py
@@ -3,7 +3,7 @@ from pathlib import Path
 from typing import TYPE_CHECKING
 
 from source.gui import widget, texture
-from source.gui.position import h_percent, w_percent
+from source.gui.position import vw, vh, vw_center
 from source.gui.scene.abc import BaseGame
 
 if TYPE_CHECKING:
@@ -41,7 +41,7 @@ class HistoryGame(BaseGame):
 
         self.previous = self.add_widget(
             widget.Button,
-            x=w_percent(20), y=h_percent(10), width=w_percent(20), height=h_percent(10),
+            x=20*vw, y=10*vh, width=20*vw, height=10*vh,
 
             label_text="Précédent",
 
@@ -52,7 +52,7 @@ class HistoryGame(BaseGame):
 
         self.next = self.add_widget(
             widget.Button,
-            x=w_percent(60), y=h_percent(10), width=w_percent(20), height=h_percent(10),
+            x=60*vw, y=10*vh, width=20*vw, height=10*vh,
 
             label_text="Suivant",
 
@@ -63,7 +63,7 @@ class HistoryGame(BaseGame):
 
         self.text_move = self.add_widget(
             widget.Text,
-            x=w_percent(50), y=h_percent(12),
+            x=vw_center, y=12*vh,
 
             anchor_x="center",
 
diff --git a/source/gui/scene/HistoryMenu.py b/source/gui/scene/HistoryMenu.py
index 642b8bc..fd16bff 100644
--- a/source/gui/scene/HistoryMenu.py
+++ b/source/gui/scene/HistoryMenu.py
@@ -2,7 +2,7 @@ import math
 from pathlib import Path
 from typing import TYPE_CHECKING
 
-from source.gui.position import w_percent, h_percent
+from source.gui.position import vw, vh, top
 from source.path import path_history
 from source.gui import widget, texture
 from source.gui.scene.abc import Scene
@@ -20,7 +20,7 @@ class HistoryMenu(Scene):
 
         self.back = self.add_widget(
             widget.Button,
-            x=20, y=20, width=w_percent(20), height=h_percent(10),
+            x=20, y=20, width=20*vw, height=10*vh,
 
             label_text="Retour",
 
@@ -37,7 +37,7 @@ class HistoryMenu(Scene):
         self.title = self.add_widget(
             widget.Text,
 
-            x=w_percent(50), y=h_percent(80),
+            x=50*vw, y=80*vh,
 
             anchor_x="center",
 
@@ -49,7 +49,7 @@ class HistoryMenu(Scene):
             button = self.add_widget(
                 widget.Button,
 
-                x=w_percent(25), y=h_percent(75 - ((i+1) * 9)), width=w_percent(50), height=h_percent(8),
+                x=25*vw, y=top((25 + (i*9))*vh), width=50*vw, height=8*vh,
 
                 label_text=path.stem,
 
@@ -66,7 +66,7 @@ class HistoryMenu(Scene):
             # si nous ne sommes pas à la première page, ajoute un bouton "précédent".
             self.previous = self.add_widget(
                 widget.Button,
-                x=w_percent(10), y=h_percent(45), width=w_percent(10), height=h_percent(10),
+                x=10*vw, y=45*vh, width=10*vw, height=10*vh,
 
                 label_text="Précédent",
 
@@ -82,7 +82,7 @@ class HistoryMenu(Scene):
             # si nous ne sommes pas à la dernière page, ajoute un bouton "suivant".
             self.next = self.add_widget(
                 widget.Button,
-                x=w_percent(80), y=h_percent(45), width=w_percent(10), height=h_percent(10),
+                x=80*vw, y=45*vh, width=10*vw, height=10*vh,
 
                 label_text="Suivant",
 
diff --git a/source/gui/scene/MainMenu.py b/source/gui/scene/MainMenu.py
index eb786d8..58c01c4 100644
--- a/source/gui/scene/MainMenu.py
+++ b/source/gui/scene/MainMenu.py
@@ -1,6 +1,6 @@
 from typing import TYPE_CHECKING
 
-from source.gui.position import w_full, h_full, h_percent, w_percent
+from source.gui.position import vw_full, vh_full, vw, vh
 from source.gui.scene.abc import Scene
 from source.gui import widget, scene, texture
 
@@ -15,7 +15,7 @@ class MainMenu(Scene):
         self.background = self.add_widget(
             widget.Image,
 
-            x=0, y=0, width=w_full, height=h_full,
+            x=0, y=0, width=vw_full, height=vh_full,
 
             image=texture.Background.main
         )
@@ -23,7 +23,7 @@ class MainMenu(Scene):
         self.title = self.add_widget(
             widget.Text,
 
-            x=50, y=h_percent(85),
+            x=50, y=85*vh,
 
             text="Bataille Navale",
             font_size=50
@@ -31,7 +31,7 @@ class MainMenu(Scene):
 
         self.game_create = self.add_widget(
             widget.Button,
-            x=50, y=h_percent(50), width=w_percent(30), height=h_percent(10),
+            x=50, y=50*vh, width=30*vw, height=10*vh,
 
             label_text="Créer une salle",
             label_font_size=20,
@@ -44,7 +44,7 @@ class MainMenu(Scene):
         self.game_join = self.add_widget(
             widget.Button,
 
-            x=50, y=h_percent(35), width=w_percent(30), height=h_percent(10),
+            x=50, y=35*vh, width=30*vw, height=10*vh,
 
             label_text="Rejoindre une salle",
             label_font_size=20,
@@ -57,7 +57,7 @@ class MainMenu(Scene):
         self.history = self.add_widget(
             widget.Button,
 
-            x=50, y=h_percent(20), width=w_percent(30), height=h_percent(10),
+            x=50, y=20*vh, width=30*vw, height=10*vh,
 
             label_text="Historique",
             label_font_size=20,
@@ -70,7 +70,7 @@ class MainMenu(Scene):
         self.settings = self.add_widget(
             widget.Button,
 
-            x=50, y=h_percent(5), width=w_percent(30), height=h_percent(10),
+            x=50, y=5*vh, width=30*vw, height=10*vh,
 
             label_text="Paramètres",
             label_font_size=20,
diff --git a/source/gui/scene/RoomCreate.py b/source/gui/scene/RoomCreate.py
index dd90743..b9c7652 100644
--- a/source/gui/scene/RoomCreate.py
+++ b/source/gui/scene/RoomCreate.py
@@ -1,7 +1,7 @@
 from typing import TYPE_CHECKING
 
 from source.gui import widget, texture, regex
-from source.gui.position import w_percent, h_percent, right_content
+from source.gui.position import vw, vh, right, px
 from source.gui.scene import RoomHost
 from source.gui.scene.abc import Scene
 from source.network.packet import PacketSettings
@@ -16,7 +16,7 @@ class RoomCreate(Scene):
 
         self.back = self.add_widget(
             widget.Button,
-            x=20, y=20, width=w_percent(20), height=h_percent(10),
+            x=20, y=20, width=20*vw, height=10*vh,
 
             label_text="Retour",
 
@@ -31,7 +31,7 @@ class RoomCreate(Scene):
         self.add_widget(
             widget.Text,
 
-            x=w_percent(10), y=h_percent(65),
+            x=10*vw, y=65*vh,
 
             anchor_x="center", anchor_y="center",
 
@@ -41,7 +41,7 @@ class RoomCreate(Scene):
         self.input_port = self.add_widget(
             widget.Input,
 
-            x=w_percent(20), y=h_percent(60), width=w_percent(15), height=h_percent(10),
+            x=20*vw, y=60*vh, width=15*vw, height=10*vh,
 
             style=texture.Input.Style1,
 
@@ -56,7 +56,7 @@ class RoomCreate(Scene):
         self.add_widget(
             widget.Text,
 
-            x=w_percent(10), y=h_percent(50),
+            x=10*vw, y=50*vh,
 
             anchor_x="center", anchor_y="center",
 
@@ -66,7 +66,7 @@ class RoomCreate(Scene):
         self.input_username = self.add_widget(
             widget.Input,
 
-            x=w_percent(20), y=h_percent(45), width=w_percent(15), height=h_percent(10),
+            x=20*vw, y=45*vh, width=15*vw, height=10*vh,
 
             type_regex=regex.username_type,
             check_regex=regex.username_check,
@@ -81,7 +81,7 @@ class RoomCreate(Scene):
         self.add_widget(
             widget.Text,
 
-            x=w_percent(10), y=h_percent(90),
+            x=10*vw, y=90*vh,
             anchor_x="center", anchor_y="center",
             text=f"Largeur de la grille"
         )
@@ -89,7 +89,7 @@ class RoomCreate(Scene):
         self.input_width = self.add_widget(
             widget.Input,
 
-            x=w_percent(20), y=h_percent(86), width=w_percent(10), height=h_percent(8),
+            x=20*vw, y=86*vh, width=10*vw, height=8*vh,
 
             type_regex=regex.number(min_length=0, max_length=4),
             check_regex=regex.number(min_length=1, max_length=4),
@@ -102,7 +102,7 @@ class RoomCreate(Scene):
         self.add_widget(
             widget.Text,
 
-            x=w_percent(10), y=h_percent(80),
+            x=10*vw, y=80*vh,
             anchor_x="center", anchor_y="center",
             text=f"Longueur de la grille"
         )
@@ -110,7 +110,7 @@ class RoomCreate(Scene):
         self.input_height = self.add_widget(
             widget.Input,
 
-            x=w_percent(20), y=h_percent(76), width=w_percent(10), height=h_percent(8),
+            x=20*vw, y=76*vh, width=10*vw, height=8*vh,
 
             type_regex=regex.number(min_length=0, max_length=4),
             check_regex=regex.number(min_length=1, max_length=4),
@@ -125,7 +125,7 @@ class RoomCreate(Scene):
         self.checkbox_host_start = self.add_widget(
             widget.Checkbox,
 
-            x=w_percent(40), y=h_percent(80), width=w_percent(5), height=h_percent(10),
+            x=40*vw, y=80*vh, width=5*vw, height=10*vh,
 
             style=texture.Checkbox.Style1,
 
@@ -135,7 +135,7 @@ class RoomCreate(Scene):
         self.add_widget(
             widget.Text,
 
-            x=w_percent(46), y=h_percent(85),
+            x=46*vw, y=85*vh,
 
             anchor_y="center",
 
@@ -158,7 +158,7 @@ class RoomCreate(Scene):
         self.button_boat_size_previous = self.add_widget(
             widget.Button,
 
-            x=w_percent(70), y=h_percent(80), width=w_percent(3), height=h_percent(10),
+            x=70*vw, y=80*vh, width=3*vw, height=10*vh,
 
             label_text="<",
             label_font_size=25,
@@ -176,7 +176,7 @@ class RoomCreate(Scene):
         self.label_boat_size = self.add_widget(
             widget.Text,
 
-            x=w_percent(80), y=h_percent(85),
+            x=80*vw, y=85*vh,
 
             anchor_x="center", anchor_y="center"
         )
@@ -184,7 +184,7 @@ class RoomCreate(Scene):
         self.button_boat_size_next = self.add_widget(
             widget.Button,
 
-            x=w_percent(87), y=h_percent(80), width=w_percent(3), height=h_percent(10),
+            x=87*vw, y=80*vh, width=3*vw, height=10*vh,
 
             label_text=">",
             label_font_size=25,
@@ -201,7 +201,7 @@ class RoomCreate(Scene):
         self.input_boat_amount = self.add_widget(
             widget.Input,
 
-            x=w_percent(70), y=h_percent(68), width=w_percent(20), height=h_percent(8),
+            x=70*vw, y=68*vh, width=20*vw, height=8*vh,
 
             type_regex=regex.number(min_length=0, max_length=4),
             check_regex=regex.number(min_length=1, max_length=4),
@@ -228,7 +228,7 @@ class RoomCreate(Scene):
         self.label_boat_recap = self.add_widget(
             widget.Text,
 
-            x=w_percent(70), y=h_percent(60), width=w_percent(20), height=h_percent(10),
+            x=70*vw, y=60*vh, width=20*vw, height=10*vh,
 
             multiline=True
         )
@@ -239,7 +239,7 @@ class RoomCreate(Scene):
 
         self.start = self.add_widget(
             widget.Button,
-            x=right_content(20), y=20, width=w_percent(20), height=h_percent(10),
+            x=right(20*px), y=20, width=20*vw, height=10*vh,
 
             label_text="Continuer",
 
diff --git a/source/gui/scene/RoomHost.py b/source/gui/scene/RoomHost.py
index 6a448b7..df7ecdb 100644
--- a/source/gui/scene/RoomHost.py
+++ b/source/gui/scene/RoomHost.py
@@ -3,7 +3,7 @@ from typing import TYPE_CHECKING
 import requests
 
 from source import network
-from source.gui.position import w_percent, h_percent
+from source.gui.position import vw, vh
 from source.gui.scene.abc import Scene
 from source.gui import widget, texture
 from source.utils.thread import in_pyglet_context, StoppableThread
@@ -23,7 +23,7 @@ class RoomHost(Scene):
 
         self.back = self.add_widget(
             widget.Button,
-            x=20, y=20, width=w_percent(20), height=h_percent(10),
+            x=20, y=20, width=20*vw, height=10*vh,
 
             label_text="Retour",
 
@@ -35,7 +35,7 @@ class RoomHost(Scene):
         self.label_ip = self.add_widget(
             widget.Text,
 
-            x=w_percent(50), y=h_percent(55),
+            x=50*vw, y=55*vh,
 
             anchor_x="center", anchor_y="center",
             font_size=20
@@ -44,7 +44,7 @@ class RoomHost(Scene):
         self.description = self.add_widget(
             widget.Text,
 
-            x=w_percent(50), y=h_percent(45),
+            x=50*vw, y=45*vh,
 
             anchor_x="center", anchor_y="center",
             text="En attente d'un second joueur..."
diff --git a/source/gui/scene/RoomJoin.py b/source/gui/scene/RoomJoin.py
index 493347c..ba72d18 100644
--- a/source/gui/scene/RoomJoin.py
+++ b/source/gui/scene/RoomJoin.py
@@ -1,7 +1,7 @@
 from typing import TYPE_CHECKING, Optional
 
 from source import network
-from source.gui.position import w_percent, h_percent
+from source.gui.position import vw, vh
 from source.gui.scene.abc import Scene
 from source.gui import widget, texture, regex
 
@@ -15,7 +15,7 @@ class RoomJoin(Scene):
 
         self.back = self.add_widget(
             widget.Button,
-            x=20, y=20, width=w_percent(20), height=h_percent(10),
+            x=20, y=20, width=20*vw, height=10*vh,
 
             label_text="Retour",
 
@@ -28,7 +28,7 @@ class RoomJoin(Scene):
 
         self.entry_username = self.add_widget(
             widget.Input,
-            x=w_percent(40), y=h_percent(55), width=w_percent(20), height=h_percent(10),
+            x=40*vw, y=55*vh, width=20*vw, height=10*vh,
 
             type_regex=regex.username_type,
             check_regex=regex.username_check,
@@ -42,7 +42,7 @@ class RoomJoin(Scene):
 
         self.entry_ip = self.add_widget(
             widget.Input,
-            x=w_percent(40), y=h_percent(45), width=w_percent(13), height=h_percent(10),
+            x=40*vw, y=45*vh, width=13*vw, height=10*vh,
 
             type_regex=regex.ipv4_type,
             check_regex=regex.ipv4_check,
@@ -54,7 +54,7 @@ class RoomJoin(Scene):
 
         self.entry_port = self.add_widget(
             widget.Input,
-            x=w_percent(53), y=h_percent(45), width=w_percent(7), height=h_percent(10),
+            x=53*vw, y=45*vh, width=7*vw, height=10*vh,
 
             type_regex=regex.port_type,
             check_regex=regex.port_check,
@@ -66,7 +66,7 @@ class RoomJoin(Scene):
 
         self.connect = self.add_widget(
             widget.Button,
-            x=w_percent(40), y=h_percent(35), width=w_percent(20), height=h_percent(10),
+            x=40*vw, y=35*vh, width=20*vw, height=10*vh,
 
             label_text="Se connecter",
 
@@ -77,7 +77,7 @@ class RoomJoin(Scene):
 
         self.status = self.add_widget(
             widget.Text,
-            x=w_percent(50), y=h_percent(25),
+            x=50*vw, y=25*vh,
 
             anchor_x="center",
         )
diff --git a/source/gui/scene/Settings.py b/source/gui/scene/Settings.py
index a178f7d..38cfc03 100644
--- a/source/gui/scene/Settings.py
+++ b/source/gui/scene/Settings.py
@@ -1,7 +1,7 @@
 from typing import TYPE_CHECKING
 
 from source.gui import widget, texture
-from source.gui.position import w_full, h_full, w_percent, h_percent
+from source.gui.position import vw_full, vh_full, vw, vh
 from source.gui.scene.abc.Popup import Popup
 
 if TYPE_CHECKING:
@@ -15,14 +15,14 @@ class Settings(Popup):
         self.background = self.add_widget(
             widget.Image,
 
-            x=0, y=0, width=w_full, height=h_full,
+            x=0, y=0, width=vw_full, height=vh_full,
 
             image=texture.Popup.Style1.background
         )
 
         self.back = self.add_widget(
             widget.Button,
-            x=20, y=20, width=w_percent(20), height=h_percent(10),
+            x=20, y=20, width=20*vw, height=10*vh,
 
             label_text="Retour",
 
@@ -34,7 +34,7 @@ class Settings(Popup):
         self.checkbox = self.add_widget(
             widget.Checkbox,
 
-            x=w_percent(45), y=h_percent(45), width=w_percent(10), height=h_percent(10),
+            x=45*vw, y=45*vh, width=10*vw, height=10*vh,
 
             style=texture.Checkbox.Style1
         )
@@ -45,7 +45,7 @@ class Settings(Popup):
         self.scroller = self.add_widget(
             widget.Scroller,
 
-            x=w_percent(30), y=h_percent(20), width=w_percent(30), height=h_percent(10),
+            x=30*vw, y=20*vh, width=30*vw, height=10*vh,
 
             style=texture.Scroller.Style1,
 
diff --git a/source/gui/scene/abc/BaseGame.py b/source/gui/scene/abc/BaseGame.py
index 3ac7c1c..6773259 100644
--- a/source/gui/scene/abc/BaseGame.py
+++ b/source/gui/scene/abc/BaseGame.py
@@ -2,7 +2,7 @@ from abc import ABC
 from typing import TYPE_CHECKING
 
 from source.gui import widget, texture
-from source.gui.position import right_content, h_percent, w_percent, w_full, h_full
+from source.gui.position import right, vw, vh, vw_full, vh_full, px
 from source.gui.scene.abc import Scene
 from source.type import Point2D
 
@@ -35,7 +35,7 @@ class BaseGame(Scene, ABC):
         self.background = self.add_widget(
             widget.Image,
 
-            x=0, y=0, width=w_full, height=h_full,
+            x=0, y=0, width=vw_full, height=vh_full,
 
             image=texture.Background.game,
         )
@@ -43,7 +43,7 @@ class BaseGame(Scene, ABC):
         self.grid_ally = self.add_widget(
             widget.GameGrid,
 
-            x=75, y=h_percent(25), width=w_percent(35), height=h_percent(50),
+            x=75, y=25*vh, width=35*vw, height=50*vh,
 
             boats_length=self.boats_length,
 
@@ -57,7 +57,7 @@ class BaseGame(Scene, ABC):
         self.grid_enemy = self.add_widget(
             widget.GameGrid,
 
-            x=right_content(75), y=h_percent(25), width=w_percent(35), height=h_percent(50),
+            x=right(75*px), y=25*vh, width=35*vw, height=50*vh,
 
             grid_style=texture.Grid.Style1,
             boat_style=texture.Grid.Boat.Style1,
@@ -69,7 +69,7 @@ class BaseGame(Scene, ABC):
         self.add_widget(
             widget.Text,
 
-            x=w_percent(27), y=h_percent(99.5),
+            x=27*vw, y=99.5*vh,
 
             text=self.name_ally,
             font_size=20,
@@ -79,7 +79,7 @@ class BaseGame(Scene, ABC):
         self.add_widget(
             widget.Text,
 
-            x=w_percent(73), y=h_percent(99.5),
+            x=73*vw, y=99.5*vh,
 
             text=self.name_enemy,
             font_size=20,
@@ -89,7 +89,7 @@ class BaseGame(Scene, ABC):
         self.score_ally = self.add_widget(
             widget.Text,
 
-            x=w_percent(44), y=h_percent(99.5),
+            x=44*vw, y=99.5*vh,
 
             text="0",
             font_size=25,
@@ -99,7 +99,7 @@ class BaseGame(Scene, ABC):
         self.score_enemy = self.add_widget(
             widget.Text,
 
-            x=w_percent(56), y=h_percent(99.5),
+            x=56*vw, y=99.5*vh,
 
             text="0",
             font_size=25,
@@ -109,7 +109,7 @@ class BaseGame(Scene, ABC):
         self.button_quit = self.add_widget(
             widget.Button,
 
-            x=w_percent(85), y=0, width=w_percent(15), height=h_percent(10),
+            x=85*vw, y=0, width=15*vw, height=10*vh,
 
             label_text="Quitter",
 
diff --git a/source/gui/widget/abc/BoxWidget.py b/source/gui/widget/abc/BoxWidget.py
index 4a847ad..16649f7 100644
--- a/source/gui/widget/abc/BoxWidget.py
+++ b/source/gui/widget/abc/BoxWidget.py
@@ -2,7 +2,7 @@ from abc import ABC
 from typing import TYPE_CHECKING, Optional
 
 from source.gui.widget.abc import Widget
-from source.type import Distance, Percentage
+from source.type import Distance
 from source.utils import in_bbox
 
 if TYPE_CHECKING:
@@ -33,15 +33,13 @@ class BoxWidget(Widget, ABC):
 
     # property
 
-    def _getter_distance(self, max_distance: int, raw_distance: Distance) -> int:
+    def _getter_distance(self, raw_distance: Distance) -> int:
         """
         Return the true distance in pixel from a more abstract distance
-        :param max_distance: the max value the distance in pixel should have
         :param raw_distance: the distance object to convert to pixel
         :return: the true distance in pixel
         """
 
-        if isinstance(raw_distance, Percentage): return int(max_distance * raw_distance)
         if isinstance(raw_distance, int): return raw_distance
         if callable(raw_distance): return raw_distance(self)
         if raw_distance is None: return 0
@@ -50,7 +48,7 @@ class BoxWidget(Widget, ABC):
 
     @property
     def x(self) -> int:
-        return self._getter_distance(self.scene.window.width, self._x)
+        return self._getter_distance(self._x)
 
     @x.setter
     def x(self, x: Distance):
@@ -58,7 +56,7 @@ class BoxWidget(Widget, ABC):
 
     @property
     def y(self) -> int:
-        return self._getter_distance(self.scene.window.height, self._y)
+        return self._getter_distance(self._y)
 
     @y.setter
     def y(self, y: Distance):
@@ -82,7 +80,7 @@ class BoxWidget(Widget, ABC):
 
     @property
     def width(self) -> int:
-        return self._getter_distance(self.scene.window.width, self._width)
+        return self._getter_distance(self._width)
 
     @width.setter
     def width(self, width: Optional[Distance]):
@@ -90,7 +88,7 @@ class BoxWidget(Widget, ABC):
 
     @property
     def height(self) -> int:
-        return self._getter_distance(self.scene.window.height, self._height)
+        return self._getter_distance(self._height)
 
     @height.setter
     def height(self, height: Optional[Distance]):
diff --git a/source/type.py b/source/type.py
index 2dc0786..e44e637 100644
--- a/source/type.py
+++ b/source/type.py
@@ -1,10 +1,10 @@
-from typing import Union, Callable, Any
+from typing import Union, Callable
+
 
 Point2D = tuple[int, int]  # a 2D point
 BBox = tuple[int, int, int, int]  # a boundary box
-Percentage = float  # a percentage, represented as a number between 0 and 1
 ColorRGB = tuple[int, int, int]  # a RGB Color
 ColorRGBA = tuple[int, int, int, int]  # a RGBA Color
 
-DistanceFunction = Callable[[Any], int]  # a function that return a distance
-Distance = Union[int, Percentage, DistanceFunction]  # a distance, represented by a number, a percentage or a function
+DistanceFunc = Callable[["BoxWidget"], int]  # a function that return a position / distance
+Distance = Union[int, DistanceFunc]  # a position / distance, represented by a number or a function