CLHEP 2.0.4.7 Reference Documentation
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00001 // -*- C++ -*- 00002 // $Id: FunctionProduct.cc,v 1.3 2003/09/06 14:04:14 boudreau Exp $ 00003 #include "CLHEP/GenericFunctions/FunctionProduct.hh" 00004 #include <assert.h> 00005 00006 namespace Genfun { 00007 FUNCTION_OBJECT_IMP(FunctionProduct) 00008 00009 FunctionProduct::FunctionProduct(const AbsFunction *arg1, const AbsFunction *arg2): 00010 _arg1(arg1->clone()), 00011 _arg2(arg2->clone()) 00012 { 00013 if (arg1->dimensionality()!=arg2->dimensionality()) { 00014 std::cout 00015 << "Warning: dimension mismatch in function product" 00016 << std::endl; 00017 assert(0); 00018 } 00019 } 00020 00021 FunctionProduct::FunctionProduct(const FunctionProduct & right) : 00022 _arg1(right._arg1->clone()), 00023 _arg2(right._arg2->clone()) 00024 { 00025 } 00026 00027 FunctionProduct::~FunctionProduct() 00028 { 00029 delete _arg1; 00030 delete _arg2; 00031 } 00032 00033 00034 unsigned int FunctionProduct::dimensionality() const { 00035 return _arg1->dimensionality(); 00036 } 00037 00038 double FunctionProduct::operator ()(double x) const 00039 { 00040 return (*_arg1)(x)*(*_arg2)(x); 00041 } 00042 00043 double FunctionProduct::operator ()(const Argument & x) const 00044 { 00045 return (*_arg1)(x)*(*_arg2)(x); 00046 } 00047 00048 Derivative FunctionProduct::partial(unsigned int index) const { 00049 const AbsFunction & fPrime = 00050 (*_arg1)*(_arg2->partial(index)) + (_arg1->partial(index))*(*_arg2); 00051 return Derivative(&fPrime); 00052 } 00053 00054 } // namespace Genfun