def getResult(self, deg):
if deg == 1.0:
f = Shape()
for p in self.f.points:
f.addPoint(p)
return f
if self.shape == "trap":
f = Shape()
(a, b, c, d) = self.points
dx = (b - a) * deg
dy = deg
b = a + dx
dx = (d - c) * deg
c = d - dx
f.setPoints([(a, 0), (b, dy), (c, dy), (d, 0)])
return f
if self.shape == "tri":
f = Shape()
(a, b, c) = self.points
dx1 = (b - a) * deg
dx2 = (c - b) * deg
b = a + dx1
d = c
c = d - dx2
dy = deg
f.setPoints([(a, 0), (b, dy), (c, dy), (d, 0)])
return f
class MembershipFunction:
def __init__(self):
self.name = "InitMF"
self.f = Shape()
self.shape = None
def trap(self, a, b, c, d):
self.f.setPoints([(a, 0), (b, 1), (c, 1), (d, 0)])
self.f.sortPoints()
self.shape = "trap"
self.points = (a, b, c, d)
def tri(self, a, b, c):
self.f.setPoints([(a, 0), (b, 1), (c, 0)])
self.f.sortPoints()
self.shape = "tri"
self.points = (a, b, c)
def getDegree(self, inp):
inp = float(inp)
if self.shape == "trap":
(a, b, c, d) = self.points
if inp < a:
return 0
if inp < b:
p = (inp - a) / (b - a)
return p
if inp < c:
return 1
if inp < d:
p = (d - inp) / (d - c)
return p
return 0
if self.shape == "tri":
(a, b, c) = self.points
if inp < a:
return 0
if inp < b:
p = (inp - a) / (b - a)
return p
if inp < c:
p = (c - inp) / (c - b)
return p
return 0
def getResult(self, deg):
if deg == 1.0:
f = Shape()
for p in self.f.points:
f.addPoint(p)
return f
if self.shape == "trap":
f = Shape()
(a, b, c, d) = self.points
dx = (b - a) * deg
dy = deg
b = a + dx
dx = (d - c) * deg
c = d - dx
f.setPoints([(a, 0), (b, dy), (c, dy), (d, 0)])
return f
if self.shape == "tri":
f = Shape()
(a, b, c) = self.points
dx1 = (b - a) * deg
dx2 = (c - b) * deg
b = a + dx1
d = c
c = d - dx2
dy = deg
f.setPoints([(a, 0), (b, dy), (c, dy), (d, 0)])
return f