/************************************************************************************* * * exponentialmodel.cpp: relizes exponential model * * Copyright (c) 2007 Jakub Schwarzmeier * University of West Bohemia, Department of General Physics * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or (at * your option) any later version. * * This program is distributed in the hope that it will be useful, but * WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. * ************************************************************************/ #include "../includes.h" #include "../../../inc/ics/exponentialmodel.h" CExponentialModel::CExponentialModel() { m_name = "ExponentialModel"; m_a = 1.0; } double CExponentialModel::sigma( double r ) { return ( m_totalMass / ( 2.0 * M_PI * pow(m_a, 2.0) ) ) * exp( - r / m_a ); }