Added water splash simulator, made settings saving work for all simulators, moved all the simulators into their respective directories, improved the README, fixed too much logging

game/physics_playground/body_inventory.py

@@ -0,0 +1,33 @@
+import arcade, arcade.gui, math
+
+class BodyInventory(arcade.gui.UIGridLayout):
+    def __init__(self, window_width, window_height, selected, items):
+        super().__init__(column_count=2, row_count=math.ceil(len(items) / 2), size_hint=(0.2, 0.1))
+
+        self.items = items
+        self.selected_item = selected
+        self.buttons = {}
+        self.window_width, self.window_height = window_width, window_height
+
+        n = 0
+        for name, image in items.items():
+            self.buttons[name] = self.add(arcade.gui.UITextureButton(width=(window_width * 0.2) / 4, height=(window_width * 0.2) / 4).with_background(texture=arcade.load_texture(image), color=arcade.color.WHITE if name == self.selected_item else arcade.color.TRANSPARENT_BLACK).with_border(color=arcade.color.WHITE), column=n % 2, row=n // 2)
+            self.buttons[name].on_click = lambda event, name=name: self.change_to(name)
+            
+            n += 1
+
+    def add_item(self, name, image):
+        if not (len(self.items) + 1 <= (self.column_count * self.row_count)):
+            self.row_count += 1
+
+            self._update_size_hints()
+
+        self.buttons[name] = self.add(arcade.gui.UITextureButton(width=(self.window_width * 0.2) / 4, height=(self.window_width * 0.2) / 4, color=arcade.color.TRANSPARENT_BLACK).with_background(texture=image).with_border(color=arcade.color.WHITE), column=len(self.items) % 2, row=len(self.items) // 2)
+        self.buttons[name].on_click = lambda event, name=name: self.change_to(name)
+
+        self.items[name] = image
+
+    def change_to(self, name):
+        self.buttons[self.selected_item] = self.buttons[self.selected_item].with_background(color=arcade.color.TRANSPARENT_BLACK)
+        self.selected_item = name
+        self.buttons[self.selected_item] = self.buttons[self.selected_item].with_background(color=arcade.color.WHITE)