blob: 1d9b3ff7e224aacc9d5d210326d285f1bd0a8f2f (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
|
//static const char* sccsid = "@(#)Expr_LogOfe.cxx 3.2 95/01/10"; // Do not delete this line. Used by sccs.
// Copyright: Matra-Datavision 1991
// File: Expr_LogOfe.cxx
// Created: Tue May 28 12:33:48 1991
// Author: Arnaud BOUZY
// <adn>
#include <Expr_LogOfe.ixx>
#include <Expr_NumericValue.hxx>
#include <Expr_Division.hxx>
#include <Expr_Exponential.hxx>
#include <Expr_Operators.hxx>
#include <Expr.hxx>
Expr_LogOfe::Expr_LogOfe(const Handle(Expr_GeneralExpression)& exp)
{
CreateOperand(exp);
}
Handle(Expr_GeneralExpression) Expr_LogOfe::ShallowSimplified () const
{
Handle(Expr_GeneralExpression) myexp = Operand();
if (myexp->IsKind(STANDARD_TYPE(Expr_NumericValue))) {
Handle(Expr_NumericValue) myNVexp = Handle(Expr_NumericValue)::DownCast(myexp);
return new Expr_NumericValue(Log(myNVexp->GetValue()));
}
if (myexp->IsKind(STANDARD_TYPE(Expr_Exponential))) {
return myexp->SubExpression(1);
}
Handle(Expr_LogOfe) me = this;
return me;
}
Handle(Expr_GeneralExpression) Expr_LogOfe::Copy () const
{
return new Expr_LogOfe(Expr::CopyShare(Operand()));
}
Standard_Boolean Expr_LogOfe::IsIdentical (const Handle(Expr_GeneralExpression)& Other) const
{
if (Other->IsKind(STANDARD_TYPE(Expr_LogOfe))) {
Handle(Expr_GeneralExpression) myexp = Operand();
return myexp->IsIdentical(Other->SubExpression(1));
}
return Standard_False;
}
Standard_Boolean Expr_LogOfe::IsLinear () const
{
return !ContainsUnknowns();
}
Handle(Expr_GeneralExpression) Expr_LogOfe::Derivative (const Handle(Expr_NamedUnknown)& X) const
{
if (!Contains(X)) {
return new Expr_NumericValue(0.0);
}
Handle(Expr_GeneralExpression) myexp = Operand();
Handle(Expr_GeneralExpression) myder = myexp->Derivative(X);
Handle(Expr_Division) thediv = myder / Expr::CopyShare(myexp);
return thediv->ShallowSimplified();
}
Standard_Real Expr_LogOfe::Evaluate(const Expr_Array1OfNamedUnknown& vars, const TColStd_Array1OfReal& vals) const
{
return ::Log(Operand()->Evaluate(vars,vals));
}
TCollection_AsciiString Expr_LogOfe::String() const
{
TCollection_AsciiString str("Ln(");
str += Operand()->String();
str += ")";
return str;
}
|
