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//static const char* sccsid = "@(#)Expr_Sine.cxx 3.2 95/01/10"; // Do not delete this line. Used by sccs.
// Copyright: Matra-Datavision 1991
// File: Expr_Sine.cxx
// Created: Tue May 28 13:00:09 1991
// Author: Arnaud BOUZY
// <adn>
#include <Expr_Sine.ixx>
#include <Expr_NumericValue.hxx>
#include <Expr_ArcSine.hxx>
#include <Expr_Cosine.hxx>
#include <Expr_Product.hxx>
#include <Expr_Operators.hxx>
#include <Expr.hxx>
Expr_Sine::Expr_Sine(const Handle(Expr_GeneralExpression)& exp)
{
CreateOperand(exp);
}
Handle(Expr_GeneralExpression) Expr_Sine::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(Sin(myNVexp->GetValue()));
}
if (myexp->IsKind(STANDARD_TYPE(Expr_ArcSine))) {
return myexp->SubExpression(1);
}
Handle(Expr_Sine) me = this;
return me;
}
Handle(Expr_GeneralExpression) Expr_Sine::Copy () const
{
return new Expr_Sine(Expr::CopyShare(Operand()));
}
Standard_Boolean Expr_Sine::IsIdentical (const Handle(Expr_GeneralExpression)& Other) const
{
if (Other->IsKind(STANDARD_TYPE(Expr_Sine))) {
Handle(Expr_GeneralExpression) myexp = Operand();
return myexp->IsIdentical(Other->SubExpression(1));
}
return Standard_False;
}
Standard_Boolean Expr_Sine::IsLinear () const
{
return !ContainsUnknowns();
}
Handle(Expr_GeneralExpression) Expr_Sine::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_Cosine) firstder = new Expr_Cosine(Expr::CopyShare(myexp));
Handle(Expr_Product) resu = firstder->ShallowSimplified() * myder;
return resu->ShallowSimplified();
}
Standard_Real Expr_Sine::Evaluate(const Expr_Array1OfNamedUnknown& vars, const TColStd_Array1OfReal& vals) const
{
return ::Sin(Operand()->Evaluate(vars,vals));
}
TCollection_AsciiString Expr_Sine::String() const
{
TCollection_AsciiString str("Sin(");
str += Operand()->String();
str += ")";
return str;
}
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