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//static const char* sccsid = "@(#)Expr_BinaryFunction.cxx 3.2 95/01/10"; // Do not delete this line. Used by sccs.
// Copyright: Matra-Datavision 1991
// File: Expr_BinaryFunction.cxx
// Created: Thu May 30 09:15:26 1991
// Author: Arnaud BOUZY
// <adn>
#ifndef DEB
#define No_Standard_RangeError
#define No_Standard_OutOfRange
#endif
#include <Expr_BinaryFunction.ixx>
#include <Expr_InvalidFunction.hxx>
#include <Expr_Array1OfNamedUnknown.hxx>
#include <Expr_Array1OfGeneralExpression.hxx>
#include <Expr_FunctionDerivative.hxx>
#include <Expr_Product.hxx>
#include <Expr_Sum.hxx>
#include <Expr_Operators.hxx>
#include <Expr.hxx>
Expr_BinaryFunction::Expr_BinaryFunction (const Handle(Expr_GeneralFunction)& func, const Handle(Expr_GeneralExpression)& exp1, const Handle(Expr_GeneralExpression)& exp2)
{
if (func->NbOfVariables() != 2) {
Expr_InvalidFunction::Raise();
}
myFunction = func;
CreateFirstOperand(exp1);
CreateSecondOperand(exp2);
}
Handle(Expr_GeneralExpression) Expr_BinaryFunction::ShallowSimplified () const
{
if (FirstOperand()->IsKind(STANDARD_TYPE(Expr_NumericValue))) {
if (SecondOperand()->IsKind(STANDARD_TYPE(Expr_NumericValue))) {
TColStd_Array1OfReal tabval(1,2);
tabval(1) = Handle(Expr_NumericValue)::DownCast(FirstOperand())->GetValue();
tabval(2) = Handle(Expr_NumericValue)::DownCast(SecondOperand())->GetValue();
Expr_Array1OfNamedUnknown vars(1,2);
vars(1) = myFunction->Variable(1);
vars(2) = myFunction->Variable(2);
Standard_Real res = myFunction->Evaluate(vars,tabval);
return new Expr_NumericValue(res);
}
}
Handle(Expr_BinaryFunction) me = this;
return me;
}
Handle(Expr_GeneralExpression) Expr_BinaryFunction::Copy () const
{
return new Expr_BinaryFunction(myFunction,
Expr::CopyShare(FirstOperand()),
Expr::CopyShare(SecondOperand()));
}
Standard_Boolean Expr_BinaryFunction::IsIdentical (const Handle(Expr_GeneralExpression)& Other) const
{
if (!Other->IsKind(STANDARD_TYPE(Expr_BinaryFunction))) {
return Standard_False;
}
Handle(Expr_BinaryFunction) fother = Handle(Expr_BinaryFunction)::DownCast(Other);
Handle(Expr_GeneralExpression) otherexp = fother->FirstOperand();
if (otherexp->IsIdentical(FirstOperand())) {
otherexp = fother->SecondOperand();
if (otherexp->IsIdentical(SecondOperand())) {
if (myFunction->IsIdentical(fother->Function())) {
return Standard_True;
}
}
}
return Standard_False;
}
Standard_Boolean Expr_BinaryFunction::IsLinear () const
{
if (!ContainsUnknowns()) {
return Standard_True;
}
if (!FirstOperand()->IsLinear()) {
return Standard_False;
}
if (!SecondOperand()->IsLinear()) {
return Standard_False;
}
if (!myFunction->IsLinearOnVariable(1)) {
return Standard_False;
}
return myFunction->IsLinearOnVariable(2);
}
Handle(Expr_GeneralExpression) Expr_BinaryFunction::Derivative (const Handle(Expr_NamedUnknown)& X) const
{
Handle(Expr_NamedUnknown) myvar1 = myFunction->Variable(1);
Handle(Expr_NamedUnknown) myvar2 = myFunction->Variable(2);
Handle(Expr_GeneralExpression) myfop = FirstOperand();
Handle(Expr_GeneralExpression) mysop = SecondOperand();
Handle(Expr_GeneralExpression) myexpder1 = myfop->Derivative(X);
Handle(Expr_GeneralExpression) myexpder2 = mysop->Derivative(X);
Handle(Expr_GeneralFunction) myfuncder1 = myFunction->Derivative(myvar1);
Handle(Expr_BinaryFunction) firstpart
= new Expr_BinaryFunction(myfuncder1,
Expr::CopyShare(myfop),
Expr::CopyShare(mysop));
Handle(Expr_GeneralExpression) fpart = firstpart->ShallowSimplified() * myexpder1;
Handle(Expr_GeneralFunction) myfuncder2 = myFunction->Derivative(myvar2);
Handle(Expr_BinaryFunction) secondpart
= new Expr_BinaryFunction(myfuncder2,
Expr::CopyShare(myfop),
Expr::CopyShare(mysop));
Handle(Expr_GeneralExpression) spart = secondpart->ShallowSimplified() * myexpder2;
fpart = fpart->ShallowSimplified();
spart = spart->ShallowSimplified();
return (fpart + spart)->ShallowSimplified();
}
Handle(Expr_GeneralFunction) Expr_BinaryFunction::Function () const
{
return myFunction;
}
Standard_Real Expr_BinaryFunction::Evaluate(const Expr_Array1OfNamedUnknown& vars, const TColStd_Array1OfReal& vals) const
{
Expr_Array1OfNamedUnknown varsfunc(1,2);
varsfunc(1) = myFunction->Variable(1);
varsfunc(2) = myFunction->Variable(2);
TColStd_Array1OfReal valsfunc(1,2);
valsfunc(1) = FirstOperand()->Evaluate(vars,vals);
valsfunc(2) = SecondOperand()->Evaluate(vars,vals);
return myFunction->Evaluate(varsfunc,valsfunc);
}
TCollection_AsciiString Expr_BinaryFunction::String() const
{
TCollection_AsciiString res = myFunction->GetStringName();
res += TCollection_AsciiString('(');
res += FirstOperand()->String();
res += ",";
res += SecondOperand()->String();
res += ")";
return res;
}
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