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973c2be1e1
The copying permission statements at the beginning of source files updated to refer to LGPL. Copyright dates extended till 2014 in advance.
89 lines
2.8 KiB
C++
89 lines
2.8 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
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// under the terms of the GNU Lesser General Public 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_Cosine.ixx>
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#include <Expr_NumericValue.hxx>
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#include <Expr_ArcCosine.hxx>
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#include <Expr_Sine.hxx>
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#include <Expr_UnaryMinus.hxx>
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#include <Expr_Product.hxx>
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#include <Expr_Operators.hxx>
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#include <Expr.hxx>
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Expr_Cosine::Expr_Cosine(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_Cosine::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(Cos(myNVexp->GetValue()));
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}
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if (myexp->IsKind(STANDARD_TYPE(Expr_ArcCosine))) {
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return myexp->SubExpression(1);
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}
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Handle(Expr_Cosine) me = this;
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return me;
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}
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Handle(Expr_GeneralExpression) Expr_Cosine::Copy () const
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{
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return new Expr_Cosine(Expr::CopyShare(Operand()));
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}
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Standard_Boolean Expr_Cosine::IsIdentical (const Handle(Expr_GeneralExpression)& Other) const
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{
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if (Other->IsKind(STANDARD_TYPE(Expr_Cosine))) {
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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_Cosine::IsLinear () const
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{
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return !ContainsUnknowns();
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}
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Handle(Expr_GeneralExpression) Expr_Cosine::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_Sine) firstder = new Expr_Sine(Expr::CopyShare(myexp));
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Handle(Expr_UnaryMinus) fder = - (firstder->ShallowSimplified());
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Handle(Expr_Product) resu = fder->ShallowSimplified() * myder;
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return resu->ShallowSimplified();
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}
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Standard_Real Expr_Cosine::Evaluate(const Expr_Array1OfNamedUnknown& vars, const TColStd_Array1OfReal& vals) const
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{
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return ::Cos(Operand()->Evaluate(vars,vals));
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}
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TCollection_AsciiString Expr_Cosine::String() const
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{
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TCollection_AsciiString str("Cos(");
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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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