--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/skaapsteker/utils.py	Fri May 06 16:37:43 2011 +0200
@@ -0,0 +1,34 @@
+import operator
+import functools
+
+
+def mktuple(thing):
+    if isinstance(thing, (list, tuple)):
+        return tuple(thing)
+    return (thing, thing)
+
+
+def coord_op(fun, coord, operand):
+    operand = mktuple(operand)
+    return (fun(coord[0], operand[0]),
+            fun(coord[1], operand[1]))
+
+
+def mk_cop(op):
+    return functools.partial(coord_op, op)
+
+
+def mk_cuop(op):
+    return lambda coord: (op(coord[0]), op(coord[1]))
+
+
+cadd = mk_cop(operator.add)
+csub = mk_cop(operator.sub)
+cmul = mk_cop(operator.mul)
+cdiv = mk_cop(operator.div)
+cclamp = mk_cop(lambda a, b: max(min(a, b), -b))
+
+cint = mk_cuop(int)
+cneg = mk_cuop(lambda a: -a)
+cabs = mk_cuop(abs)
+