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Vector.py
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Vector.py
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from Point import Point
class Vector(object):
def __init__(self,point_a,point_b):
self.point_a = point_a
self.point_b = point_b
def to_position_vector(self):
x = self.point_b.x - self.point_a.x
y = self.point_b.y - self.point_a.y
z = self.point_b.z - self.point_a.z
return PositionVector(x,y,z)
def __add__(self,other):
return self.to_position_vector() + other.to_position_vector()
def __sub__(self,other):
return self.to_position_vector() - other.to_position_vector()
def __mul__(self,other):
return self.to_position_vector() * other.to_position_vector()
def cross(self,other):
return self.to_position_vector().cross(other.to_position_vector())
def __repr__(self):
return '%s to %s' % (self.point_a,self.point_b)
class PositionVector(Vector):
def __init__(self,x,y,z):
self.x = x
self.y = y
self.z = z
Vector.__init__(self,Point(0,0,0),Point(x,y,z))
def cross(self,other):
x = self.y * other.z - self.z * other.y
y = self.z * other.x - self.x * other.z
z = self.x * other.y - self.y * other.x
return PositionVector(x,y,z)
def __add__(self,other):
x = self.x + other.x
y = self.y + other.y
z = self.z + other.z
return PositionVector(x,y,z)
def __sub__(self,other):
x = self.x - other.x
y = self.y - other.y
z = self.z - other.z
return PositionVector(x,y,z)
def __mul__(self,other):
if isinstance(other, (int, long, float, complex)):
x = self.x *other
y = self.y *other
z = self.z *other
return PositionVector(x,y,z)
else:
x = self.x * other.x
y = self.y * other.y
z = self.z * other.z
return x + y + z
def __repr__(self):
return '<%s,%s,%s>' % (self.x,self.y,self.z)