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122 lines
3.9 KiB
C++
122 lines
3.9 KiB
C++
// Created on: 1991-04-19
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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_Exponentiate.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_SequenceOfGeneralExpression.hxx>
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#include <Expr_Square.hxx>
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#include <Expr_SquareRoot.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_Square,Expr_UnaryExpression)
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Expr_Square::Expr_Square (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_Square::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(Square(myNVexp->GetValue()));
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}
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if (myexp->IsKind(STANDARD_TYPE(Expr_SquareRoot))) {
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return myexp->SubExpression(1);
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}
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if (myexp->IsKind(STANDARD_TYPE(Expr_Square))) {
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Handle(Expr_GeneralExpression) op = myexp->SubExpression(1);
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Handle(Expr_NumericValue) val4 = new Expr_NumericValue(4.0);
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return new Expr_Exponentiate(op,val4);
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}
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if (myexp->IsKind(STANDARD_TYPE(Expr_Exponentiate))) {
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Handle(Expr_GeneralExpression) op = myexp->SubExpression(1);
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Handle(Expr_GeneralExpression) puis = myexp->SubExpression(2);
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Handle(Expr_Product) newpuis = 2.0 * puis;
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Handle(Expr_Exponentiate) res = new Expr_Exponentiate(op,newpuis->ShallowSimplified());
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return res->ShallowSimplified();
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}
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Handle(Expr_Square) me = this;
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return me;
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}
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Handle(Expr_GeneralExpression) Expr_Square::Copy () const
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{
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return new Expr_Square(Expr::CopyShare(Operand()));
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}
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Standard_Boolean Expr_Square::IsIdentical (const Handle(Expr_GeneralExpression)& Other) const
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{
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if (Other->IsKind(STANDARD_TYPE(Expr_Square))) {
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return Operand()->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_Square::IsLinear () const
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{
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return !ContainsUnknowns();
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}
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Handle(Expr_GeneralExpression) Expr_Square::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) myder = Operand();
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myder = myder->Derivative(X);
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Handle(Expr_NumericValue) coef = new Expr_NumericValue(2.0);
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Expr_SequenceOfGeneralExpression ops;
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ops.Append(coef);
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ops.Append(myder);
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Handle(Expr_GeneralExpression) usedop = Expr::CopyShare(Operand());
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ops.Append(usedop);
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Handle(Expr_Product) resu = new Expr_Product(ops);
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return resu->ShallowSimplified();
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}
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Standard_Real Expr_Square::Evaluate(const Expr_Array1OfNamedUnknown& vars, const TColStd_Array1OfReal& vals) const
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{
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Standard_Real val = Operand()->Evaluate(vars,vals);
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return val*val;
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}
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TCollection_AsciiString Expr_Square::String() const
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{
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TCollection_AsciiString str;
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Handle(Expr_GeneralExpression) op = Operand();
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if (op->NbSubExpressions() > 1) {
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str = "(";
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str += op->String();
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str += ")^2";
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}
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else {
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str = op->String();
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str += "^2";
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}
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return str;
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}
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