Points & Rectangles
A pair of classes to provide points and rectangles.
Surprisingly, I haven't been able to find a single Python module providing such primitive support.
WxPython supports wxPoint and wxRect, but it lacks many basic functions (such as, say, adding two points together to produce a third point..!)
This code is lacking a zillion essential features (such as "Length"). I only put in the ones I needed immediately. Please add, refactor, optimize, rename stuff to be more standard, etc., as you see fit..!
If there's an actual, accessible, easy-to-include Python module, not tied to a graphics library, that does this stuff already, please write about it here! No sense in reinventing the wheel. I've looked, but haven't found one. Hence this.
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1 # Code is Public Domain.
2 def normalize(x1, y1, x2, y2):
3 return min(x1,x2), min(y1,y2), max(x1,x2), max(y1,y2)
4
5 class Point:
6 def __init__(self, x, y):
7 self.x = x
8 self.y = y
9 def __add__(self, other):
10 return Point(self.x+other.x, self.y+other.y)
11 def __sub__(self, other):
12 return Point(self.x-other.x, self.y-other.y)
13 def __mul__( self, scalar ):
14 return Point(self.x*scalar, self.y*scalar)
15 def __div__(self, scalar):
16 return Point(self.x/scalar, self.y/scalar)
17 def __str__(self):
18 return "(%s, %s)" % (self.x, self.y)
19 def __repr__(self):
20 return "%s(%r, %r)" % (self.__class__.__name__, self.x, self.y)
21 def XY(self):
22 return self.x,self.y
23 def Clone(self):
24 return Point(self.x, self.y)
25 def Integerize(self):
26 self.x = int(self.x)
27 self.y = int(self.y)
28 def Floatize(self):
29 self.x = float(self.x)
30 self.y = float(self.y)
31
32 class Rect:
33 def __init__(self, pt1, pt2):
34 self.Set(pt1, pt2)
35 def Contains(self, pt):
36 x,y = pt.XY()
37 return self.left <= x <= self.right and self.top <= y <= self.bottom
38 def Set( self, pt1, pt2 ):
39 extrema = normalize(pt1.x, pt1.y, pt2.x, pt2.y)
40 self.left, self.top, self.right, self.bottom = extrema
41 def Overlaps(self, other):
42 return (self.right > other.left and self.left < other.right
43 and self.top < other.bottom and self.bottom > other.top)
44 def GetTL(self):
45 return Point(self.left, self.top)
46 def GetBR(self):
47 return Point(self.right, self.bottom)
48 def ExpandedBy(self, n):
49 p1 = Point(self.left-n, self.top+n)
50 p2 = Point(self.right+n, self.bottom+n)
51 return Rect(p1, p2)
52 def TransformedByFunction(self, foo):
53 p1 = Point(self.left, self.top)
54 p2 = Point(self.right, self.bottom)
55 return Rect(foo(p1), foo(p2))
56 def __str__( self ):
57 return "<Rect (%s,%s)-(%s,%s)>" % (self.left,self.top,
58 self.right,self.bottom)