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//static const char* sccsid = "@(#)Expr_ArgSinh.cxx 3.2 95/01/10"; // Do not delete this line. Used by sccs.
// Copyright: Matra-Datavision 1991
// File: Expr_ArgSinh.cxx
// Created: Mon May 27 12:10:02 1991
// Author: Arnaud BOUZY
// <adn>
#include <Expr_ArgSinh.ixx>
#include <Expr_NumericValue.hxx>
#include <Expr_Sinh.hxx>
#include <Expr_Division.hxx>
#include <Expr_Square.hxx>
#include <Expr_Sum.hxx>
#include <Expr_SquareRoot.hxx>
#include <Expr_Operators.hxx>
#include <Expr.hxx>
Expr_ArgSinh::Expr_ArgSinh (const Handle(Expr_GeneralExpression)& exp)
{
CreateOperand(exp);
}
Handle(Expr_GeneralExpression) Expr_ArgSinh::ShallowSimplified () const
{
Handle(Expr_GeneralExpression) op = Operand();
if (op->IsKind(STANDARD_TYPE(Expr_NumericValue))) {
Handle(Expr_NumericValue) valop = Handle(Expr_NumericValue)::DownCast(op);
return new Expr_NumericValue(ASinh(valop->GetValue()));
}
if (op->IsKind(STANDARD_TYPE(Expr_Sinh))) {
return op->SubExpression(1);
}
Handle(Expr_ArgSinh) me = this;
return me;
}
Handle(Expr_GeneralExpression) Expr_ArgSinh::Copy () const
{
return new Expr_ArgSinh(Expr::CopyShare(Operand()));
}
Standard_Boolean Expr_ArgSinh::IsIdentical (const Handle(Expr_GeneralExpression)& Other) const
{
if (!Other->IsKind(STANDARD_TYPE(Expr_ArgSinh))) {
return Standard_False;
}
Handle(Expr_GeneralExpression) op = Operand();
return op->IsIdentical(Other->SubExpression(1));
}
Standard_Boolean Expr_ArgSinh::IsLinear () const
{
if (ContainsUnknowns()) {
return Standard_False;
}
return Standard_True;
}
Handle(Expr_GeneralExpression) Expr_ArgSinh::Derivative (const Handle(Expr_NamedUnknown)& X) const
{
if (!Contains(X)) {
return new Expr_NumericValue(0.0);
}
Handle(Expr_GeneralExpression) op = Operand();
Handle(Expr_GeneralExpression) derop = op->Derivative(X);
Handle(Expr_Square) sq = new Expr_Square(Expr::CopyShare(op));
// X2 + 1
Handle(Expr_Sum) thesum = sq->ShallowSimplified() + 1.0;
// sqrt(X2 + 1)
Handle(Expr_SquareRoot) theroot = new Expr_SquareRoot(thesum->ShallowSimplified());
// ArgSinh'(F(X)) = F'(X)/sqrt(F(X)2+1)
Handle(Expr_Division) thediv = derop / theroot->ShallowSimplified();
return thediv->ShallowSimplified();
}
Standard_Real Expr_ArgSinh::Evaluate(const Expr_Array1OfNamedUnknown& vars, const TColStd_Array1OfReal& vals) const
{
Standard_Real val = Operand()->Evaluate(vars,vals);
return ::Log(val + ::Sqrt(::Square(val)+1.0));
}
TCollection_AsciiString Expr_ArgSinh::String() const
{
TCollection_AsciiString str("ASinh(");
str += Operand()->String();
str += ")";
return str;
}
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