def recognize(self, traces):
		#security verification
		for trace in traces:
			if len(trace) < 2:
				return (None, 0)	#return none gesture
		#information about the gesture	
		numTracesGesture = len(traces)
		pointsGesture = Helper.normalizeGesture(traces)
		#comparison process
		bestDistance = float('infinity')
		bestTemplate = None
		for template in self.templates:
			distance = Helper.distanceAtBestAngle(pointsGesture, numTracesGesture, template, -angleRange, +angleRange, anglePrecision)
			if distance < bestDistance:
				bestDistance = distance
				bestTemplate = template
				score = 1.0 - (bestDistance / halfDiagonal)
		#get the best template
		if bestTemplate == None:
			return(None, 0)
		else:
			return (bestTemplate.name, score)
	def __init__(self, name, gesture):
		self.name = name
		self.numTracesGesture = len(gesture)
		self.points = Helper.normalizeGesture(gesture)