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# Copyright 2006-2007 Nanorex, Inc. See LICENSE file for details.
__author__ = 'oleksandr'
"""interval representation"""
class Interval:
def __init__(self, *args):
"""interval constructor"""
self.min = 0
self.max = 0
if len(args) == 0:
pass
if len(args) == 2:
self.min, self.max = args
def __str__(self):
"""returns the interval in a textual form"""
s = ""
s += "%s " % self.min
s += "%s " % self.max
return s
def Empty(self):
"""clear interval"""
self.min = 1000000
self.max = -1000000
def Center(self):
"""calculate center"""
return (self.max + self.min) / 2
def Extent(self):
"""calculate extent"""
return (self.max - self.min) / 2
def Point(self, u):
"""calculate point"""
return (1 - u) * self.min + u * self.max
def Normalize(self, u):
"""normalization"""
return (u - self.min) / (self.max - self.min)
def Contains(self, p):
"""interval contains point"""
return p >= self.min and p <= self.max
def Enclose(self, p):
"""adjust interval"""
if (p < self.min):
self.min = p;
if (p > self.max):
self.max = p;
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