00001 /* @HEADER@ */ 00002 // ************************************************************************ 00003 // 00004 // Sundance 00005 // Copyright (2005) Sandia Corporation 00006 // 00007 // Copyright (year first published) Sandia Corporation. Under the terms 00008 // of Contract DE-AC04-94AL85000 with Sandia Corporation, the U.S. Government 00009 // retains certain rights in this software. 00010 // 00011 // This library is free software; you can redistribute it and/or modify 00012 // it under the terms of the GNU Lesser General Public License as 00013 // published by the Free Software Foundation; either version 2.1 of the 00014 // License, or (at your option) any later version. 00015 // 00016 // This library is distributed in the hope that it will be useful, but 00017 // WITHOUT ANY WARRANTY; without even the implied warranty of 00018 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 00019 // Lesser General Public License for more details. 00020 // 00021 // You should have received a copy of the GNU Lesser General Public 00022 // License along with this library; if not, write to the Free Software 00023 // Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 00024 // USA 00025 // Questions? Contact Kevin Long (krlong@sandia.gov), 00026 // Sandia National Laboratories, Livermore, California, USA 00027 // 00028 // ************************************************************************ 00029 /* @HEADER@ */ 00030 00031 #ifndef SUNDANCE_CURVENORMEXPR_H 00032 #define SUNDANCE_CURVENORMEXPR_H 00033 00034 #include "SundanceEvaluatorFactory.hpp" 00035 #include "SundanceCurveNormEvaluator.hpp" 00036 00037 namespace Sundance 00038 { 00039 using namespace Sundance; 00040 00041 /** 00042 * CurveNormExpr is an 00043 * expression that returns the Cartesian coordinate component 00044 * of the normal vector. Which dimensional component will be returned 00045 * can be specified in the constructor argument. <br> 00046 * The normal vector of the curve is always pointing outwards. This 00047 * outwards direction is in terms of the parameterized curve equation 00048 * from positive values to negative values. 00049 */ 00050 class CurveNormExpr : public EvaluatableExpr, 00051 public GenericEvaluatorFactory<CurveNormExpr, CurveNormEvaluator> 00052 { 00053 public: 00054 /** */ 00055 CurveNormExpr(int dir, const std::string& name=""); 00056 00057 /** */ 00058 virtual ~CurveNormExpr() {;} 00059 00060 /** */ 00061 virtual XMLObject toXML() const ; 00062 00063 /** */ 00064 int dir() const {return dir_;} 00065 00066 /** */ 00067 const std::string& name() const {return name_;} 00068 00069 /** Write a simple text description suitable 00070 * for output to a terminal */ 00071 virtual std::ostream& toText(std::ostream& os, bool paren) const 00072 {os<<name(); return os;} 00073 00074 /** */ 00075 virtual Set<MultipleDeriv> 00076 internalFindW(int order, const EvalContext& context) const ; 00077 00078 /* we use the default implementation from the supper class */ 00079 //virtual Set<MultipleDeriv> 00080 //internalFindC(int order, const EvalContext& context) const ; 00081 00082 /* we use the default implementation from the supper class */ 00083 //virtual Set<MultipleDeriv> 00084 //internalFindV(int order, const EvalContext& context) const ; 00085 00086 /** */ 00087 virtual RCP<ExprBase> getRcp() {return rcp(this);} 00088 00089 /** Ordering operator for use in transforming exprs to standard form */ 00090 virtual bool lessThan(const ScalarExpr* other) const ; 00091 00092 static std::string coordName(int dir, const std::string& name); 00093 00094 private: 00095 int dir_; 00096 std::string name_; 00097 }; 00098 } 00099 00100 #endif