root/OpenSceneGraph/trunk/include/osg/Vec2b @ 13041

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1/* -*-c++-*- OpenSceneGraph - Copyright (C) 1998-2006 Robert Osfield
2 *
3 * This library is open source and may be redistributed and/or modified under
4 * the terms of the OpenSceneGraph Public License (OSGPL) version 0.0 or
5 * (at your option) any later version.  The full license is in LICENSE file
6 * included with this distribution, and on the openscenegraph.org website.
7 *
8 * This library is distributed in the hope that it will be useful,
9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
11 * OpenSceneGraph Public License for more details.
12*/
13
14#ifndef OSG_VEC2B
15#define OSG_VEC2B 1
16
17namespace osg {
18
19/** General purpose float triple.
20  * Uses include representation of color coordinates.
21  * No support yet added for float * Vec2b - is it necessary?
22  * Need to define a non-member non-friend operator*  etc.
23  * Vec2b * float is okay
24*/
25class Vec2b
26{
27    public:
28
29        // Methods are defined here so that they are implicitly inlined
30
31        /** Data type of vector components.*/
32        typedef signed char value_type;
33
34        /** Number of vector components. */
35        enum { num_components = 2 };
36
37        /** Vec member variable. */
38        value_type _v[2];
39
40        /** Constructor that sets all components of the vector to zero */
41        Vec2b() { _v[0]=0; _v[1]=0; }
42
43        Vec2b(value_type r, value_type g)
44        {
45            _v[0]=r; _v[1]=g;
46        }
47
48        inline bool operator == (const Vec2b& v) const { return _v[0]==v._v[0] && _v[1]==v._v[1]; }
49
50        inline bool operator != (const Vec2b& v) const { return _v[0]!=v._v[0] || _v[1]!=v._v[1]; }
51
52        inline bool operator <  (const Vec2b& v) const
53        {
54            if (_v[0]<v._v[0]) return true;
55            else if (_v[0]>v._v[0]) return false;
56            else return (_v[1]<v._v[1]);
57        }
58
59        inline value_type* ptr() { return _v; }
60        inline const value_type* ptr() const { return _v; }
61
62        inline void set( value_type x, value_type y)
63        {
64            _v[0]=x; _v[1]=y;
65        }
66
67        inline void set( const Vec2b& rhs)
68        {
69            _v[0]=rhs._v[0]; _v[1]=rhs._v[1];
70        }
71
72        inline value_type& operator [] (int i) { return _v[i]; }
73        inline value_type operator [] (int i) const { return _v[i]; }
74
75        inline value_type& x() { return _v[0]; }
76        inline value_type& y() { return _v[1]; }
77
78        inline value_type x() const { return _v[0]; }
79        inline value_type y() const { return _v[1]; }
80
81        inline value_type& r() { return _v[0]; }
82        inline value_type& g() { return _v[1]; }
83
84        inline value_type r() const { return _v[0]; }
85        inline value_type g() const { return _v[1]; }
86
87        /** Multiply by scalar. */
88        inline Vec2b operator * (float rhs) const
89        {
90            Vec2b col(*this);
91            col *= rhs;
92            return col;
93        }
94
95        /** Unary multiply by scalar. */
96        inline Vec2b& operator *= (float rhs)
97        {
98            _v[0]=(value_type)((float)_v[0]*rhs);
99            _v[1]=(value_type)((float)_v[1]*rhs);
100            return *this;
101        }
102
103        /** Divide by scalar. */
104        inline Vec2b operator / (float rhs) const
105        {
106            Vec2b col(*this);
107            col /= rhs;
108            return col;
109        }
110
111        /** Unary divide by scalar. */
112        inline Vec2b& operator /= (float rhs)
113        {
114            float div = 1.0f/rhs;
115            *this *= div;
116            return *this;
117        }
118
119        /** Binary vector add. */
120        inline Vec2b operator + (const Vec2b& rhs) const
121        {
122            return Vec2b(_v[0]+rhs._v[0], _v[1]+rhs._v[1]);
123        }
124
125        /** Unary vector add. Slightly more efficient because no temporary
126          * intermediate object.
127        */
128        inline Vec2b& operator += (const Vec2b& rhs)
129        {
130            _v[0] += rhs._v[0];
131            _v[1] += rhs._v[1];
132            return *this;
133        }
134
135        /** Binary vector subtract. */
136        inline Vec2b operator - (const Vec2b& rhs) const
137        {
138            return Vec2b(_v[0]-rhs._v[0], _v[1]-rhs._v[1]);
139        }
140
141        /** Unary vector subtract. */
142        inline Vec2b& operator -= (const Vec2b& rhs)
143        {
144            _v[0]-=rhs._v[0];
145            _v[1]-=rhs._v[1];
146            return *this;
147        }
148
149};    // end of class Vec2b
150
151
152
153}    // end of namespace osg
154
155#endif
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