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German Larrain committed 30a21ae

utils.matrix: added 'dot_product' and 'cross_product' method stubs

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 		raise NotImplementedError()
 
 	def unitize(self):
-		# see utils.math.unitize
+		# see utils.mathematical.unitize
+		raise NotImplementedError()
+
+	@classmethod
+	def dot_product(cls, v1, v2):
+		# see utils.mathematical.dot_product
 		raise NotImplementedError()
 
 	@classmethod
 		raise NotImplementedError()
 
 	@classmethod
+	def cross_product(cls, v1, v2):
+		# see utils.mathematical.cross_product
+		raise NotImplementedError()
+
+	@classmethod
 	def is_vector3(cls, vector_):
 		# See RTB's 'isvec.m'.
 		raise NotImplementedError()