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//static const char* sccsid = "@(#)Expr_Cosine.cxx 3.2 95/01/10"; // Do not delete this line. Used by sccs.
// Copyright: Matra-Datavision 1991
// File: Expr_Cosine.cxx
// Created: Mon May 27 17:24:38 1991
// Author: Arnaud BOUZY
// <adn>
#include <Expr_Cosine.ixx>
#include <Expr_NumericValue.hxx>
#include <Expr_ArcCosine.hxx>
#include <Expr_Sine.hxx>
#include <Expr_UnaryMinus.hxx>
#include <Expr_Product.hxx>
#include <Expr_Operators.hxx>
#include <Expr.hxx>
Expr_Cosine::Expr_Cosine(const Handle(Expr_GeneralExpression)& exp)
{
CreateOperand(exp);
}
Handle(Expr_GeneralExpression) Expr_Cosine::ShallowSimplified () const
{
Handle(Expr_GeneralExpression) myexp = Operand();
if (myexp->IsKind(STANDARD_TYPE(Expr_NumericValue))) {
Handle(Expr_NumericValue) myNVexp = Handle(Expr_NumericValue)::DownCast(myexp);
return new Expr_NumericValue(Cos(myNVexp->GetValue()));
}
if (myexp->IsKind(STANDARD_TYPE(Expr_ArcCosine))) {
return myexp->SubExpression(1);
}
Handle(Expr_Cosine) me = this;
return me;
}
Handle(Expr_GeneralExpression) Expr_Cosine::Copy () const
{
return new Expr_Cosine(Expr::CopyShare(Operand()));
}
Standard_Boolean Expr_Cosine::IsIdentical (const Handle(Expr_GeneralExpression)& Other) const
{
if (Other->IsKind(STANDARD_TYPE(Expr_Cosine))) {
Handle(Expr_GeneralExpression) myexp = Operand();
return myexp->IsIdentical(Other->SubExpression(1));
}
return Standard_False;
}
Standard_Boolean Expr_Cosine::IsLinear () const
{
return !ContainsUnknowns();
}
Handle(Expr_GeneralExpression) Expr_Cosine::Derivative (const Handle(Expr_NamedUnknown)& X) const
{
if (!Contains(X)) {
return new Expr_NumericValue(0.0);
}
Handle(Expr_GeneralExpression) myexp = Operand();
Handle(Expr_GeneralExpression) myder = myexp->Derivative(X);
Handle(Expr_Sine) firstder = new Expr_Sine(Expr::CopyShare(myexp));
Handle(Expr_UnaryMinus) fder = - (firstder->ShallowSimplified());
Handle(Expr_Product) resu = fder->ShallowSimplified() * myder;
return resu->ShallowSimplified();
}
Standard_Real Expr_Cosine::Evaluate(const Expr_Array1OfNamedUnknown& vars, const TColStd_Array1OfReal& vals) const
{
return ::Cos(Operand()->Evaluate(vars,vals));
}
TCollection_AsciiString Expr_Cosine::String() const
{
TCollection_AsciiString str("Cos(");
str += Operand()->String();
str += ")";
return str;
}
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