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94 lines
2.9 KiB
C++
94 lines
2.9 KiB
C++
// Created on: 1991-05-27
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// Created by: Arnaud BOUZY
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// Copyright (c) 1991-1999 Matra Datavision
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// Copyright (c) 1999-2014 OPEN CASCADE SAS
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//
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// This file is part of Open CASCADE Technology software library.
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//
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// This library is free software; you can redistribute it and/or modify it under
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// the terms of the GNU Lesser General Public License version 2.1 as published
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// by the Free Software Foundation, with special exception defined in the file
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// OCCT_LGPL_EXCEPTION.txt. Consult the file LICENSE_LGPL_21.txt included in OCCT
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// distribution for complete text of the license and disclaimer of any warranty.
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//
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// Alternatively, this file may be used under the terms of Open CASCADE
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// commercial license or contractual agreement.
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#include <Expr.hxx>
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#include <Expr_Absolute.hxx>
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#include <Expr_GeneralExpression.hxx>
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#include <Expr_NamedUnknown.hxx>
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#include <Expr_NotEvaluable.hxx>
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#include <Expr_NumericValue.hxx>
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#include <Expr_Operators.hxx>
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#include <Expr_Product.hxx>
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#include <Expr_Sign.hxx>
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#include <Expr_UnaryMinus.hxx>
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#include <Standard_NumericError.hxx>
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#include <Standard_Type.hxx>
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#include <TCollection_AsciiString.hxx>
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IMPLEMENT_STANDARD_RTTIEXT(Expr_Absolute,Expr_UnaryExpression)
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Expr_Absolute::Expr_Absolute (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_Absolute::ShallowSimplified () const
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{
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Handle(Expr_GeneralExpression) op = Operand();
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if (op->IsKind(STANDARD_TYPE(Expr_NumericValue))) {
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Handle(Expr_NumericValue) valop = Handle(Expr_NumericValue)::DownCast(op);
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return new Expr_NumericValue(Abs(valop->GetValue()));
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}
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if (op->IsKind(STANDARD_TYPE(Expr_UnaryMinus))) {
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return new Expr_Absolute(op->SubExpression(1));
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}
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Handle(Expr_Absolute) me = this;
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return me;
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}
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Handle(Expr_GeneralExpression) Expr_Absolute::Copy () const
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{
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return new Expr_Absolute(Expr::CopyShare(Operand()));
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}
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Standard_Boolean Expr_Absolute::IsIdentical (const Handle(Expr_GeneralExpression)& Other) const
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{
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if (!Other->IsKind(STANDARD_TYPE(Expr_Absolute))) {
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return Standard_False;
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}
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Handle(Expr_GeneralExpression) op = Operand();
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return op->IsIdentical(Other->SubExpression(1));
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}
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Standard_Boolean Expr_Absolute::IsLinear () const
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{
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return !ContainsUnknowns();
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}
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Handle(Expr_GeneralExpression) Expr_Absolute::Derivative (const Handle(Expr_NamedUnknown)& X) const
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{
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Handle(Expr_GeneralExpression) op = Operand();
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Handle(Expr_GeneralExpression) derop = op->Derivative(X);
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Handle(Expr_Sign) myder = new Expr_Sign(Expr::CopyShare(op));
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Handle(Expr_Product) resul = myder->ShallowSimplified() * derop;
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return resul->ShallowSimplified();
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}
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Standard_Real Expr_Absolute::Evaluate(const Expr_Array1OfNamedUnknown& vars, const TColStd_Array1OfReal& vals) const
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{
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return ::Abs(Operand()->Evaluate(vars,vals));
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}
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TCollection_AsciiString Expr_Absolute::String() const
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{
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TCollection_AsciiString str("Abs(");
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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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