blob: ab93ea6a6e869d3f063085c5371315dfd653f2c1 (
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
76
|
//static const char* sccsid = "@(#)Expr_Absolute.cxx 3.2 95/01/10"; // Do not delete this line. Used by sccs.
// Copyright: Matra-Datavision 1991
// File: Expr_Absolute.cxx
// Created: Mon May 27 10:13:50 1991
// Author: Arnaud BOUZY
// <adn>
#include <Expr_Absolute.ixx>
#include <Expr_NumericValue.hxx>
#include <Expr_UnaryMinus.hxx>
#include <Expr_Sign.hxx>
#include <Expr_Product.hxx>
#include <Expr_Operators.hxx>
#include <Expr.hxx>
Expr_Absolute::Expr_Absolute (const Handle(Expr_GeneralExpression)& exp)
{
CreateOperand(exp);
}
Handle(Expr_GeneralExpression) Expr_Absolute::ShallowSimplified () const
{
Handle(Expr_GeneralExpression) op = Operand();
if (op->IsKind(STANDARD_TYPE(Expr_NumericValue))) {
Handle(Expr_NumericValue) valop = Handle(Expr_NumericValue)::DownCast(op);
return new Expr_NumericValue(Abs(valop->GetValue()));
}
if (op->IsKind(STANDARD_TYPE(Expr_UnaryMinus))) {
return new Expr_Absolute(op->SubExpression(1));
}
Handle(Expr_Absolute) me = this;
return me;
}
Handle(Expr_GeneralExpression) Expr_Absolute::Copy () const
{
return new Expr_Absolute(Expr::CopyShare(Operand()));
}
Standard_Boolean Expr_Absolute::IsIdentical (const Handle(Expr_GeneralExpression)& Other) const
{
if (!Other->IsKind(STANDARD_TYPE(Expr_Absolute))) {
return Standard_False;
}
Handle(Expr_GeneralExpression) op = Operand();
return op->IsIdentical(Other->SubExpression(1));
}
Standard_Boolean Expr_Absolute::IsLinear () const
{
return !ContainsUnknowns();
}
Handle(Expr_GeneralExpression) Expr_Absolute::Derivative (const Handle(Expr_NamedUnknown)& X) const
{
Handle(Expr_GeneralExpression) op = Operand();
Handle(Expr_GeneralExpression) derop = op->Derivative(X);
Handle(Expr_Sign) myder = new Expr_Sign(Expr::CopyShare(op));
Handle(Expr_Product) resul = myder->ShallowSimplified() * derop;
return resul->ShallowSimplified();
}
Standard_Real Expr_Absolute::Evaluate(const Expr_Array1OfNamedUnknown& vars, const TColStd_Array1OfReal& vals) const
{
return ::Abs(Operand()->Evaluate(vars,vals));
}
TCollection_AsciiString Expr_Absolute::String() const
{
TCollection_AsciiString str("Abs(");
str += Operand()->String();
str += ")";
return str;
}
|
