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131 lines
4.2 KiB
C++
131 lines
4.2 KiB
C++
// 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) 1999-2014 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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#ifndef OCCT_DEBUG
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#define No_Standard_RangeError
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#define No_Standard_OutOfRange
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#endif
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#include <Expr.hxx>
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#include <Expr_Array1OfGeneralExpression.hxx>
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#include <Expr_Array1OfNamedUnknown.hxx>
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#include <Expr_FunctionDerivative.hxx>
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#include <Expr_GeneralExpression.hxx>
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#include <Expr_GeneralFunction.hxx>
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#include <Expr_InvalidFunction.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_UnaryFunction.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_UnaryFunction,Expr_UnaryExpression)
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Expr_UnaryFunction::Expr_UnaryFunction (const Handle(Expr_GeneralFunction)& func, const Handle(Expr_GeneralExpression)& exp)
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{
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if (func->NbOfVariables() != 1) {
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throw Expr_InvalidFunction();
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}
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myFunction = func;
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CreateOperand(exp);
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}
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Handle(Expr_GeneralFunction) Expr_UnaryFunction::Function () const
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{
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return myFunction;
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}
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Handle(Expr_GeneralExpression) Expr_UnaryFunction::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) nval = Handle(Expr_NumericValue)::DownCast(op);
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TColStd_Array1OfReal tabval(1,1);
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tabval(1) = nval->GetValue();
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Expr_Array1OfNamedUnknown vars(1,1);
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vars(1) = myFunction->Variable(1);
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Standard_Real res = myFunction->Evaluate(vars,tabval);
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return new Expr_NumericValue(res);
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}
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Handle(Expr_UnaryFunction) me = this;
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return me;
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}
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Handle(Expr_GeneralExpression) Expr_UnaryFunction::Copy () const
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{
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return new Expr_UnaryFunction(myFunction,Expr::CopyShare(Operand()));
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}
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Standard_Boolean Expr_UnaryFunction::IsIdentical (const Handle(Expr_GeneralExpression)& Other) const
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{
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if (!Other->IsKind(STANDARD_TYPE(Expr_UnaryFunction))) {
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return Standard_False;
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}
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Handle(Expr_UnaryFunction) fother = Handle(Expr_UnaryFunction)::DownCast(Other);
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Handle(Expr_GeneralExpression) otherexp = fother->Operand();
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if (otherexp->IsIdentical(Operand())) {
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if (myFunction->IsIdentical(fother->Function())) {
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return Standard_True;
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}
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}
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return Standard_False;
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}
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Standard_Boolean Expr_UnaryFunction::IsLinear () const
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{
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if (!ContainsUnknowns()) {
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return Standard_True;
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}
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if (!Operand()->IsLinear()) {
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return Standard_False;
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}
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return myFunction->IsLinearOnVariable(1);
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}
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Handle(Expr_GeneralExpression) Expr_UnaryFunction::Derivative (const Handle(Expr_NamedUnknown)& X) const
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{
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Handle(Expr_NamedUnknown) myvar = myFunction->Variable(1);
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Handle(Expr_GeneralExpression) myop = Operand();
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Handle(Expr_GeneralExpression) myexpder = myop->Derivative(X);
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Handle(Expr_GeneralFunction) myfuncder = myFunction->Derivative(myvar);
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Handle(Expr_UnaryFunction) firstpart = new Expr_UnaryFunction(myfuncder,Expr::CopyShare(myop));
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Handle(Expr_Product) resu = firstpart->ShallowSimplified() * myexpder;
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return resu->ShallowSimplified();
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}
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Standard_Real Expr_UnaryFunction::Evaluate(const Expr_Array1OfNamedUnknown& vars, const TColStd_Array1OfReal& vals) const
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{
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Expr_Array1OfNamedUnknown varsfunc(1,1);
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varsfunc(1) = myFunction->Variable(1);
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TColStd_Array1OfReal valsfunc(1,1);
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valsfunc(1) = Operand()->Evaluate(vars,vals);
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return myFunction->Evaluate(varsfunc,valsfunc);
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}
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TCollection_AsciiString Expr_UnaryFunction::String() const
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{
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TCollection_AsciiString res = myFunction->GetStringName();
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res += "(";
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res += Operand()->String();
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res += ")";
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return res;
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}
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