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