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90 lines
2.9 KiB
C++
Executable File
90 lines
2.9 KiB
C++
Executable File
// Created on: 1991-05-28
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// Created by: Arnaud BOUZY
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// Copyright (c) 1991-1999 Matra Datavision
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// Copyright (c) 1999-2012 OPEN CASCADE SAS
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//
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// The content of this file is subject to the Open CASCADE Technology Public
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// License Version 6.5 (the "License"). You may not use the content of this file
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// except in compliance with the License. Please obtain a copy of the License
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// at http://www.opencascade.org and read it completely before using this file.
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//
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// The Initial Developer of the Original Code is Open CASCADE S.A.S., having its
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// main offices at: 1, place des Freres Montgolfier, 78280 Guyancourt, France.
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//
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// The Original Code and all software distributed under the License is
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// distributed on an "AS IS" basis, without warranty of any kind, and the
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// Initial Developer hereby disclaims all such warranties, including without
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// limitation, any warranties of merchantability, fitness for a particular
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// purpose or non-infringement. Please see the License for the specific terms
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// and conditions governing the rights and limitations under the License.
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#include <Expr_LogOfe.ixx>
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#include <Expr_NumericValue.hxx>
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#include <Expr_Division.hxx>
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#include <Expr_Exponential.hxx>
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#include <Expr_Operators.hxx>
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#include <Expr.hxx>
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Expr_LogOfe::Expr_LogOfe(const Handle(Expr_GeneralExpression)& exp)
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{
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CreateOperand(exp);
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}
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Handle(Expr_GeneralExpression) Expr_LogOfe::ShallowSimplified () const
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{
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Handle(Expr_GeneralExpression) myexp = Operand();
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if (myexp->IsKind(STANDARD_TYPE(Expr_NumericValue))) {
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Handle(Expr_NumericValue) myNVexp = Handle(Expr_NumericValue)::DownCast(myexp);
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return new Expr_NumericValue(Log(myNVexp->GetValue()));
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}
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if (myexp->IsKind(STANDARD_TYPE(Expr_Exponential))) {
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return myexp->SubExpression(1);
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}
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Handle(Expr_LogOfe) me = this;
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return me;
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}
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Handle(Expr_GeneralExpression) Expr_LogOfe::Copy () const
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{
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return new Expr_LogOfe(Expr::CopyShare(Operand()));
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}
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Standard_Boolean Expr_LogOfe::IsIdentical (const Handle(Expr_GeneralExpression)& Other) const
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{
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if (Other->IsKind(STANDARD_TYPE(Expr_LogOfe))) {
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Handle(Expr_GeneralExpression) myexp = Operand();
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return myexp->IsIdentical(Other->SubExpression(1));
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}
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return Standard_False;
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}
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Standard_Boolean Expr_LogOfe::IsLinear () const
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{
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return !ContainsUnknowns();
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}
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Handle(Expr_GeneralExpression) Expr_LogOfe::Derivative (const Handle(Expr_NamedUnknown)& X) const
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{
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if (!Contains(X)) {
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return new Expr_NumericValue(0.0);
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}
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Handle(Expr_GeneralExpression) myexp = Operand();
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Handle(Expr_GeneralExpression) myder = myexp->Derivative(X);
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Handle(Expr_Division) thediv = myder / Expr::CopyShare(myexp);
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return thediv->ShallowSimplified();
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}
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Standard_Real Expr_LogOfe::Evaluate(const Expr_Array1OfNamedUnknown& vars, const TColStd_Array1OfReal& vals) const
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{
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return ::Log(Operand()->Evaluate(vars,vals));
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}
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TCollection_AsciiString Expr_LogOfe::String() const
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{
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TCollection_AsciiString str("Ln(");
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str += Operand()->String();
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str += ")";
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return str;
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}
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