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ImfRational.h
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34 
35 
36 #ifndef INCLUDED_IMF_RATIONAL_H
37 #define INCLUDED_IMF_RATIONAL_H
38 
39 #include "ImfExport.h"
40 #include "ImfNamespace.h"
41 
42 //-----------------------------------------------------------------------------
43 //
44 // Rational numbers
45 //
46 // A rational number is represented as pair of integers, n and d.
47 // The value of of the rational number is
48 //
49 // n/d for d > 0
50 // positive infinity for n > 0, d == 0
51 // negative infinity for n < 0, d == 0
52 // not a number (NaN) for n == 0, d == 0
53 //
54 //-----------------------------------------------------------------------------
55 
57 
58 
60 {
61  public:
62 
63  int n; // numerator
64  unsigned int d; // denominator
65 
66 
67  //----------------------------------------
68  // Default constructor, sets value to zero
69  //----------------------------------------
70 
71  Rational (): n (0), d (1) {}
72 
73 
74  //-------------------------------------
75  // Constructor, explicitly sets n and d
76  //-------------------------------------
77 
78  Rational (int n, int d): n (n), d (d) {}
79 
80 
81  //----------------------------
82  // Constructor, approximates x
83  //----------------------------
84 
85  explicit Rational (double x);
86 
87 
88  //---------------------------------
89  // Approximate conversion to double
90  //---------------------------------
91 
92  operator double () const {return double (n) / double (d);}
93 };
94 
95 
97 
98 #endif
#define OPENEXR_IMF_INTERNAL_NAMESPACE_HEADER_EXIT
Definition: ImfNamespace.h:109
GLdouble n
Definition: glcorearb.h:2007
#define IMF_EXPORT
Definition: ImfExport.h:59
GLint GLenum GLint x
Definition: glcorearb.h:408
#define OPENEXR_IMF_INTERNAL_NAMESPACE_HEADER_ENTER
Definition: ImfNamespace.h:108
Rational(int n, int d)
Definition: ImfRational.h:78
unsigned int d
Definition: ImfRational.h:64