boundary_condition.py
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	#!/usr/bin/env python3
	__copyright__ = (
	"Copyright (©) 2020-2023 EPFL (Ecole Polytechnique Fédérale de Lausanne)"
	"Laboratory (LSMS - Laboratoire de Simulation en Mécanique des Solides)"
	)
	__license__ = "LGPLv3"


	import math


	class SinBoundary:
	def __init__(self, amplitude, phase):
	self.amplitude = amplitude
	self.phase = phase

	def compute(self, disp, coord, flags):
	disp[1] = - self.amplitude * math.sin(self.phase * coord[1])
	flags[1] = True