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import glVector
class glPoint (list):
def __init__ (self, first = 0, second = 0, third = 0):
# Allow creation from a vector
if (isinstance (first, glVector.glVector)):
self.x = first.i
self.y = first.j
self.z = first.k
else:
self.x = first
self.y = second
self.z = third
def __str__ (self):
return "x=%f y=%f z=%f" % (self.x, self.y, self.z)
def __iadd__ (self, other):
self.x += other.x
self.y += other.y
self.z += other.z
return self
def __add__ (self, other):
result = glPoint (self.x, self.y, self.z)
result += other
return result
def __sub__ (self, other):
""" Create a vector from the difference between this point and another point """
result = glVector.glVector (self.x - other.x, self.y - other.y, self.z - other.z)
return result
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