Add some basic geometry primitives

Point, Vector, Size, and Rect. These are modeled on the CoreGraphics types.

roguebasin/geometry.py

@@ -0,0 +1,65 @@
+#!/usr/bin/env python3
+# Eryn Wells <eryn@erynwells.me>
+
+class Point:
+    __slots__ = ('x', 'y')
+
+    def __init__(self, x: int = 0, y: int = 0):
+        self.x = x
+        self.y = y
+
+    def __str__(self):
+        return f'(x:{self.x}, y:{self.y})'
+
+    def __repr__(self):
+        return f'Point({self.x}, {self.y})'
+
+class Vector:
+    __slots__ = ('dx', 'dy')
+
+    def __init__(self, dx: int = 0, dy: int = 0):
+        self.dx = dx
+        self.dy = dy
+
+    def __str__(self):
+        return f'(δx:{self.x}, δy:{self.y})'
+
+    def __repr__(self):
+        return f'Vector({self.x}, {self.y})'
+
+class Size:
+    __slots__ = ('width', 'height')
+
+    def __init__(self, width: int = 0, height: int = 0):
+        self.width = width
+        self.height = height
+
+    def __str__(self):
+        return f'(w:{self.width}, h:{self.height})'
+
+    def __repr__(self):
+        return f'Size({self.width}, {self.height})'
+
+class Rect:
+    __slots__ = ('origin', 'size')
+
+    def __init__(self, x: int = 0, y: int = 0, w: int = 0, h: int = 0):
+        '''
+        Construct a new rectangle.
+        '''
+        self.origin = Point(x, y)
+        self.size = Size(w, h)
+
+    @property
+    def max_x(self) -> int:
+        return self.origin.x + self.size.width
+
+    @property
+    def max_y(self) -> int:
+        return self.origin.y + self.size.height
+
+    def __str__(self):
+        return f'({self.origin}, {self.size})'
+
+    def __repr__(self):
+        return f'Rect({self.origin.x}, {self.origin.y}, {self.size.width}, {self.size.height})'