00001 /**************************************************************************** 00002 Copyright (C)2002 David Jung <opensim@pobox.com> 00003 00004 This program/file is free software; you can redistribute it and/or modify 00005 it under the terms of the GNU General Public License as published by 00006 the Free Software Foundation; either version 2 of the License, or 00007 (at your option) any later version. 00008 00009 This program is distributed in the hope that it will be useful, 00010 but WITHOUT ANY WARRANTY; without even the implied warranty of 00011 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 00012 GNU General Public License for more details. (http://www.gnu.org) 00013 00014 You should have received a copy of the GNU General Public License 00015 along with this program; if not, write to the Free Software 00016 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 00017 00018 $Id: CosExpression.cpp 1029 2004-02-11 20:45:54Z jungd $ 00019 $Revision: 1.3 $ 00020 $Date: 2004-02-11 15:45:54 -0500 (Wed, 11 Feb 2004) $ 00021 $Author: jungd $ 00022 00023 ****************************************************************************/ 00024 00025 #include <base/CosExpression> 00026 #include <base/NegateExpression> 00027 #include <base/ProductExpression> 00028 #include <base/SinExpression> 00029 00030 using base::ExpressionNode; 00031 using base::NegateExpression; 00032 using base::ProductExpression; 00033 using base::SinExpression; 00034 using base::CosExpression; 00035 00036 void CosExpression::cacheDerivative(Int withRespectToIndex) const 00037 { 00038 derivative = ref<ExpressionNode>( NewObj NegateExpression(ref<ExpressionNode>( 00039 NewObj ProductExpression( ref<ExpressionNode>(NewObj SinExpression(arg)), 00040 arg->differentiate(withRespectToIndex)) ) ) ); 00041 derivWithRespToIndex = withRespectToIndex; 00042 derivCached = true; 00043 }