made Array2D ensure width and heigth are ints.

ursina/array_tools.py

@@ -16,17 +16,21 @@ def __init__(self, width:int=None, height:int=None, default_value=0, data:List[L
 
         if data is not None:                # initialize with provided data
             self.width = len(data)
-            self.height = len(data[0]) if self.width > 0 else 0
+            self.height = len(data[0])
+            if self.width == 0 or self.height == 0:
+                raise ValueError("width and height must be >= 1.")
+
             if any(len(row) != self.height for row in data):
-                raise ValueError("All rows in the data must have the same length.")
+                raise ValueError("all rows in the data must have the same length.")
+
             super().__init__(data)
 
         else:   # Initialize with default values 
             if width is None or height is None:
-                raise ValueError("Width and height must be provided if no data is given.")
+                raise ValueError("width and height must be provided if no data is given.")
 
-            self.width = width
-            self.height = height
+            self.width = int(width)
+            self.height = int(height)
             super().__init__([[self.default_value for _ in range(self.height)] for _ in range(self.width)])
 
     def to_string(self):

ursina/vec3.py

@@ -105,6 +105,12 @@ def Y(self):
     @property
     def Z(self):
         return int(self.z)
+    @property
+    def XY(self):
+        return (self.X, self.Y)
+    @property
+    def XZ(self):
+        return (self.X, self.Z)
 
 
     def __mul__(self, value):