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//static const char* sccsid = "@(#)Expr_UnaryFunction.cxx 3.2 95/01/10"; // Do not delete this line. Used by sccs.
// Copyright: Matra-Datavision 1991
// File: Expr_UnaryFunction.cxx
// Created: Tue May 28 14:40:33 1991
// Author: Arnaud BOUZY
// <adn>
#ifndef DEB
#define No_Standard_RangeError
#define No_Standard_OutOfRange
#endif
#include <Expr_UnaryFunction.ixx>
#include <Expr_InvalidFunction.hxx>
#include <Expr_Array1OfNamedUnknown.hxx>
#include <Expr_Array1OfGeneralExpression.hxx>
#include <Expr_FunctionDerivative.hxx>
#include <Expr_Product.hxx>
#include <Expr_Operators.hxx>
#include <Expr.hxx>
Expr_UnaryFunction::Expr_UnaryFunction (const Handle(Expr_GeneralFunction)& func, const Handle(Expr_GeneralExpression)& exp)
{
if (func->NbOfVariables() != 1) {
Expr_InvalidFunction::Raise();
}
myFunction = func;
CreateOperand(exp);
}
Handle(Expr_GeneralFunction) Expr_UnaryFunction::Function () const
{
return myFunction;
}
Handle(Expr_GeneralExpression) Expr_UnaryFunction::ShallowSimplified () const
{
Handle(Expr_GeneralExpression) op = Operand();
if (op->IsKind(STANDARD_TYPE(Expr_NumericValue))) {
Handle(Expr_NumericValue) nval = Handle(Expr_NumericValue)::DownCast(op);
TColStd_Array1OfReal tabval(1,1);
tabval(1) = nval->GetValue();
Expr_Array1OfNamedUnknown vars(1,1);
vars(1) = myFunction->Variable(1);
Standard_Real res = myFunction->Evaluate(vars,tabval);
return new Expr_NumericValue(res);
}
Handle(Expr_UnaryFunction) me = this;
return me;
}
Handle(Expr_GeneralExpression) Expr_UnaryFunction::Copy () const
{
return new Expr_UnaryFunction(myFunction,Expr::CopyShare(Operand()));
}
Standard_Boolean Expr_UnaryFunction::IsIdentical (const Handle(Expr_GeneralExpression)& Other) const
{
if (!Other->IsKind(STANDARD_TYPE(Expr_UnaryFunction))) {
return Standard_False;
}
Handle(Expr_UnaryFunction) fother = Handle(Expr_UnaryFunction)::DownCast(Other);
Handle(Expr_GeneralExpression) otherexp = fother->Operand();
if (otherexp->IsIdentical(Operand())) {
if (myFunction->IsIdentical(fother->Function())) {
return Standard_True;
}
}
return Standard_False;
}
Standard_Boolean Expr_UnaryFunction::IsLinear () const
{
if (!ContainsUnknowns()) {
return Standard_True;
}
if (!Operand()->IsLinear()) {
return Standard_False;
}
return myFunction->IsLinearOnVariable(1);
}
Handle(Expr_GeneralExpression) Expr_UnaryFunction::Derivative (const Handle(Expr_NamedUnknown)& X) const
{
Handle(Expr_NamedUnknown) myvar = myFunction->Variable(1);
Handle(Expr_GeneralExpression) myop = Operand();
Handle(Expr_GeneralExpression) myexpder = myop->Derivative(X);
Handle(Expr_GeneralFunction) myfuncder = myFunction->Derivative(myvar);
Handle(Expr_UnaryFunction) firstpart = new Expr_UnaryFunction(myfuncder,Expr::CopyShare(myop));
Handle(Expr_Product) resu = firstpart->ShallowSimplified() * myexpder;
return resu->ShallowSimplified();
}
Standard_Real Expr_UnaryFunction::Evaluate(const Expr_Array1OfNamedUnknown& vars, const TColStd_Array1OfReal& vals) const
{
Expr_Array1OfNamedUnknown varsfunc(1,1);
varsfunc(1) = myFunction->Variable(1);
TColStd_Array1OfReal valsfunc(1,1);
valsfunc(1) = Operand()->Evaluate(vars,vals);
return myFunction->Evaluate(varsfunc,valsfunc);
}
TCollection_AsciiString Expr_UnaryFunction::String() const
{
TCollection_AsciiString res = myFunction->GetStringName();
res += "(";
res += Operand()->String();
res += ")";;
return res;
}
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