def testComputeLength(self):
l1 = Line(1, 2, 4, 10)
self.assertAlmostEqual(8.544, l1.computeLength(), places=3)
l2 = Line(1, 2, 1, 3)
self.assertAlmostEqual(1, l2.computeLength(), places=3)
l3 = Line(3, -2, -4, 10)
self.assertAlmostEqual(13.892, l3.computeLength(), places=3)
class Triangle:
def __init__(self, *args, **kwargs):
try:
if not self.__constructWithPoints(args[0], args[1], args[2]):
if not self.__constructWithLines(args[0], args[1], args[2]):
if not self.__constructWithCoords(
args[0], args[1], args[2], args[3], args[4],
args[5]):
raise ShapeException("Triangle construction failed")
except IndexError:
raise ShapeException("Invalid arguments for triangle construction")
def __constructWithCoords(self, x1, y1, x2, y2, x3, y3):
try:
self.__line1 = Line(x1, y1, x2, y2)
self.__line2 = Line(x2, y2, x3, y3)
self.__line3 = Line(x3, y3, x1, y1)
Validator.validateTriangle(value=self,
errorMessage="Triangle invalid")
return True
except ShapeException:
return False
def __constructWithPoints(self, point1, point2, point3):
try:
self.__line1 = Line(point1, point2)
self.__line2 = Line(point2, point3)
self.__line3 = Line(point3, point1)
Validator.validateTriangle(value=self,
errorMessage="Triangle invalid")
return True
except ShapeException:
return False
def __constructWithLines(self, line1, line2, line3):
try:
self.__line1 = line1
self.__line2 = line2
self.__line3 = line3
Validator.validateTriangle(value=self,
errorMessage="Triangle invalid")
return True
except ShapeException:
return False
@property
def point1(self):
return self.__line1.point1
@property
def point2(self):
return self.__line2.point1
@property
def point3(self):
return self.__line3.point1
@property
def line1(self):
return self.__line1
@property
def line2(self):
return self.__line2
@property
def line3(self):
return self.__line3
def move(self, deltaX, deltaY):
self.__line1.move(deltaX, deltaY)
self.__line2.move(deltaX, deltaY)
self.__line3.move(deltaX, deltaY)
def computeArea(self):
"""Compute area using Heron's formula"""
a = self.__line1.computeLength()
b = self.__line2.computeLength()
c = self.__line3.computeLength()
s = (a + b + c) / 2
return math.sqrt(s * (s - a) * (s - b) * (s - c))
class Rectangle:
def __init__(self, *args, **kwargs):
try: # Construct with x1, y1, x2, y2, x3, y3, x4, y4
if not self.__constructWithPoints(args[0], args[1], args[2],
args[3]):
if not self.__constructWithLines(args[0], args[1], args[2],
args[3]):
if not self.__constructWithCoords(
args[0], args[1], args[2], args[3], args[4],
args[5], args[6], args[7]):
raise ShapeException("Rectangle construction failed")
except IndexError:
raise ShapeException("Invalid arguments for shape construction")
def __constructWithCoords(self, x1, y1, x2, y2, x3, y3, x4, y4):
try:
self.__line1 = Line(x1, y1, x2, y2)
self.__line2 = Line(x2, y2, x3, y3)
self.__line3 = Line(x3, y3, x4, y4)
self.__line4 = Line(x4, y4, x1, y1)
Validator.validateRectangle(value=self,
errorMessage="Invalid Rectangle")
return True
except ShapeException:
return False
def __constructWithPoints(self, point1, point2, point3, point4):
try:
self.__line1 = Line(point1, point2)
self.__line2 = Line(point2, point3)
self.__line3 = Line(point3, point4)
self.__line4 = Line(point4, point1)
Validator.validateRectangle(value=self,
errorMessage="Invalid Rectangle")
return True
except ShapeException:
return False
def __constructWithLines(self, line1, line2, line3, line4):
try:
self.__line1 = line1
self.__line2 = line2
self.__line3 = line3
self.__line4 = line4
Validator.validateRectangle(value=self,
errorMessage="Invalid Rectangle")
return True
except ShapeException:
return False
@property
def point1(self):
return self.__line1.point1
@property
def point2(self):
return self.__line2.point1
@property
def point3(self):
return self.__line3.point1
@property
def point4(self):
return self.__line4.point1
@property
def line1(self):
return self.__line1
@property
def line2(self):
return self.__line2
@property
def line3(self):
return self.__line3
@property
def line4(self):
return self.__line4
def move(self, deltaX, deltaY):
self.__line1.move(deltaX, deltaY)
self.__line2.move(deltaX, deltaY)
self.__line3.move(deltaX, deltaY)
self.__line4.move(deltaX, deltaY)
def computeWidth(self):
return self.__line1.computeLength()
def computeHeight(self):
return self.__line2.computeLength()
def computeArea(self):
return self.computeWidth() * self.computeHeight()