root/OpenSceneGraph/trunk/include/osg/Vec3b @ 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_VEC3B
15#define OSG_VEC3B 1
16
17namespace osg {
18
19/** General purpose float triple.
20  * Uses include representation of color coordinates.
21  * No support yet added for float * Vec3b - is it necessary?
22  * Need to define a non-member non-friend operator*  etc.
23  * Vec3b * float is okay
24*/
25class Vec3b
26{
27    public:
28
29        /** Data type of vector components.*/
30        typedef signed char value_type;
31
32        /** Number of vector components. */
33        enum { num_components = 3 };
34
35        value_type _v[3];
36
37        /** Constructor that sets all components of the vector to zero */
38        Vec3b() { _v[0]=0; _v[1]=0; _v[2]=0; }
39
40        Vec3b(value_type r, value_type g, value_type b) { _v[0]=r; _v[1]=g; _v[2]=b;  }
41
42        inline bool operator == (const Vec3b& v) const { return _v[0]==v._v[0] && _v[1]==v._v[1] && _v[2]==v._v[2]; }
43
44        inline bool operator != (const Vec3b& v) const { return _v[0]!=v._v[0] || _v[1]!=v._v[1] || _v[2]!=v._v[2]; }
45
46        inline bool operator <  (const Vec3b& v) const
47        {
48            if (_v[0]<v._v[0]) return true;
49            else if (_v[0]>v._v[0]) return false;
50            else if (_v[1]<v._v[1]) return true;
51            else if (_v[1]>v._v[1]) return false;
52            else return (_v[2]<v._v[2]);
53        }
54
55        inline value_type* ptr() { return _v; }
56        inline const value_type* ptr() const { return _v; }
57
58        inline void set(value_type r, value_type g, value_type b)
59        {
60            _v[0]=r; _v[1]=g; _v[2]=b;
61        }
62
63        inline void set( const Vec3b& rhs)
64        {
65            _v[0]=rhs._v[0]; _v[1]=rhs._v[1]; _v[2]=rhs._v[2];
66        }
67
68        inline value_type& operator [] (unsigned int i) { return _v[i]; }
69        inline value_type operator [] (unsigned int i) const { return _v[i]; }
70
71        inline value_type& x() { return _v[0]; }
72        inline value_type& y() { return _v[1]; }
73        inline value_type& z() { return _v[2]; }
74
75        inline value_type x() const { return _v[0]; }
76        inline value_type y() const { return _v[1]; }
77        inline value_type z() const { return _v[2]; }
78
79        inline value_type& r() { return _v[0]; }
80        inline value_type& g() { return _v[1]; }
81        inline value_type& b() { return _v[2]; }
82
83        inline value_type r() const { return _v[0]; }
84        inline value_type g() const { return _v[1]; }
85        inline value_type b() const { return _v[2]; }
86
87        /** Multiply by scalar. */
88        inline Vec3b operator * (float rhs) const
89        {
90            Vec3b col(*this);
91            col *= rhs;
92            return col;
93        }
94
95        /** Unary multiply by scalar. */
96        inline Vec3b& operator *= (float rhs)
97        {
98            _v[0]=(value_type)((float)_v[0]*rhs);
99            _v[1]=(value_type)((float)_v[1]*rhs);
100            _v[2]=(value_type)((float)_v[2]*rhs);
101            return *this;
102        }
103
104        /** Divide by scalar. */
105        inline Vec3b operator / (float rhs) const
106        {
107            Vec3b col(*this);
108            col /= rhs;
109            return col;
110        }
111
112        /** Unary divide by scalar. */
113        inline Vec3b& operator /= (float rhs)
114        {
115            float div = 1.0f/rhs;
116            *this *= div;
117            return *this;
118        }
119
120        /** Binary vector add. */
121        inline Vec3b operator + (const Vec3b& rhs) const
122        {
123            return Vec3b(_v[0]+rhs._v[0], _v[1]+rhs._v[1],
124                        _v[2]+rhs._v[2]);
125        }
126
127        /** Unary vector add. Slightly more efficient because no temporary
128          * intermediate object.
129        */
130        inline Vec3b& operator += (const Vec3b& rhs)
131        {
132            _v[0] += rhs._v[0];
133            _v[1] += rhs._v[1];
134            _v[2] += rhs._v[2];
135            return *this;
136        }
137
138        /** Binary vector subtract. */
139        inline Vec3b operator - (const Vec3b& rhs) const
140        {
141            return Vec3b(_v[0]-rhs._v[0], _v[1]-rhs._v[1],
142                        _v[2]-rhs._v[2]);
143        }
144
145        /** Unary vector subtract. */
146        inline Vec3b& operator -= (const Vec3b& rhs)
147        {
148            _v[0]-=rhs._v[0];
149            _v[1]-=rhs._v[1];
150            _v[2]-=rhs._v[2];
151            return *this;
152        }
153
154};    // end of class Vec3b
155
156
157
158}    // end of namespace osg
159
160#endif
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