1 | /* |
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2 | ----------------------------------------------------------------------------- |
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3 | This source file is part of OGRE |
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4 | (Object-oriented Graphics Rendering Engine) |
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5 | For the latest info, see http://www.ogre3d.org/ |
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6 | |
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7 | Copyright (c) 2000-2006 Torus Knot Software Ltd |
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8 | Also see acknowledgements in Readme.html |
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9 | |
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10 | This program is free software; you can redistribute it and/or modify it under |
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11 | the terms of the GNU Lesser General Public License as published by the Free Software |
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12 | Foundation; either version 2 of the License, or (at your option) any later |
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13 | version. |
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14 | |
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15 | This program is distributed in the hope that it will be useful, but WITHOUT |
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16 | ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS |
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17 | FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details. |
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18 | |
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19 | You should have received a copy of the GNU Lesser General Public License along with |
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20 | this program; if not, write to the Free Software Foundation, Inc., 59 Temple |
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21 | Place - Suite 330, Boston, MA 02111-1307, USA, or go to |
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22 | http://www.gnu.org/copyleft/lesser.txt. |
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23 | |
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24 | You may alternatively use this source under the terms of a specific version of |
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25 | the OGRE Unrestricted License provided you have obtained such a license from |
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26 | Torus Knot Software Ltd. |
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27 | ----------------------------------------------------------------------------- |
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28 | */ |
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29 | #ifndef __Math_H__ |
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30 | #define __Math_H__ |
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31 | |
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32 | #include "OgrePrerequisites.h" |
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33 | |
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34 | namespace Ogre |
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35 | { |
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36 | /** Wrapper class which indicates a given angle value is in Radians. |
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37 | @remarks |
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38 | Radian values are interchangeable with Degree values, and conversions |
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39 | will be done automatically between them. |
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40 | */ |
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41 | class Radian |
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42 | { |
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43 | Real mRad; |
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44 | |
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45 | public: |
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46 | explicit Radian ( Real r=0 ) : mRad(r) {} |
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47 | Radian ( const Degree& d ); |
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48 | Radian& operator = ( const Real& f ) { mRad = f; return *this; } |
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49 | Radian& operator = ( const Radian& r ) { mRad = r.mRad; return *this; } |
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50 | Radian& operator = ( const Degree& d ); |
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51 | |
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52 | Real valueDegrees() const; // see bottom of this file |
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53 | Real valueRadians() const { return mRad; } |
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54 | Real valueAngleUnits() const; |
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55 | |
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56 | const Radian& operator + () const { return *this; } |
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57 | Radian operator + ( const Radian& r ) const { return Radian ( mRad + r.mRad ); } |
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58 | Radian operator + ( const Degree& d ) const; |
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59 | Radian& operator += ( const Radian& r ) { mRad += r.mRad; return *this; } |
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60 | Radian& operator += ( const Degree& d ); |
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61 | Radian operator - () const { return Radian(-mRad); } |
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62 | Radian operator - ( const Radian& r ) const { return Radian ( mRad - r.mRad ); } |
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63 | Radian operator - ( const Degree& d ) const; |
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64 | Radian& operator -= ( const Radian& r ) { mRad -= r.mRad; return *this; } |
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65 | Radian& operator -= ( const Degree& d ); |
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66 | Radian operator * ( Real f ) const { return Radian ( mRad * f ); } |
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67 | Radian operator * ( const Radian& f ) const { return Radian ( mRad * f.mRad ); } |
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68 | Radian& operator *= ( Real f ) { mRad *= f; return *this; } |
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69 | Radian operator / ( Real f ) const { return Radian ( mRad / f ); } |
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70 | Radian& operator /= ( Real f ) { mRad /= f; return *this; } |
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71 | |
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72 | bool operator < ( const Radian& r ) const { return mRad < r.mRad; } |
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73 | bool operator <= ( const Radian& r ) const { return mRad <= r.mRad; } |
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74 | bool operator == ( const Radian& r ) const { return mRad == r.mRad; } |
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75 | bool operator != ( const Radian& r ) const { return mRad != r.mRad; } |
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76 | bool operator >= ( const Radian& r ) const { return mRad >= r.mRad; } |
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77 | bool operator > ( const Radian& r ) const { return mRad > r.mRad; } |
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78 | }; |
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79 | |
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80 | /** Wrapper class which indicates a given angle value is in Degrees. |
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81 | @remarks |
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82 | Degree values are interchangeable with Radian values, and conversions |
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83 | will be done automatically between them. |
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84 | */ |
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85 | class Degree |
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86 | { |
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87 | Real mDeg; // if you get an error here - make sure to define/typedef 'Real' first |
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88 | |
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89 | public: |
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90 | explicit Degree ( Real d=0 ) : mDeg(d) {} |
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91 | Degree ( const Radian& r ) : mDeg(r.valueDegrees()) {} |
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92 | Degree& operator = ( const Real& f ) { mDeg = f; return *this; } |
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93 | Degree& operator = ( const Degree& d ) { mDeg = d.mDeg; return *this; } |
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94 | Degree& operator = ( const Radian& r ) { mDeg = r.valueDegrees(); return *this; } |
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95 | |
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96 | Real valueDegrees() const { return mDeg; } |
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97 | Real valueRadians() const; // see bottom of this file |
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98 | Real valueAngleUnits() const; |
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99 | |
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100 | const Degree& operator + () const { return *this; } |
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101 | Degree operator + ( const Degree& d ) const { return Degree ( mDeg + d.mDeg ); } |
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102 | Degree operator + ( const Radian& r ) const { return Degree ( mDeg + r.valueDegrees() ); } |
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103 | Degree& operator += ( const Degree& d ) { mDeg += d.mDeg; return *this; } |
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104 | Degree& operator += ( const Radian& r ) { mDeg += r.valueDegrees(); return *this; } |
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105 | Degree operator - () const { return Degree(-mDeg); } |
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106 | Degree operator - ( const Degree& d ) const { return Degree ( mDeg - d.mDeg ); } |
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107 | Degree operator - ( const Radian& r ) const { return Degree ( mDeg - r.valueDegrees() ); } |
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108 | Degree& operator -= ( const Degree& d ) { mDeg -= d.mDeg; return *this; } |
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109 | Degree& operator -= ( const Radian& r ) { mDeg -= r.valueDegrees(); return *this; } |
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110 | Degree operator * ( Real f ) const { return Degree ( mDeg * f ); } |
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111 | Degree operator * ( const Degree& f ) const { return Degree ( mDeg * f.mDeg ); } |
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112 | Degree& operator *= ( Real f ) { mDeg *= f; return *this; } |
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113 | Degree operator / ( Real f ) const { return Degree ( mDeg / f ); } |
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114 | Degree& operator /= ( Real f ) { mDeg /= f; return *this; } |
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115 | |
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116 | bool operator < ( const Degree& d ) const { return mDeg < d.mDeg; } |
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117 | bool operator <= ( const Degree& d ) const { return mDeg <= d.mDeg; } |
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118 | bool operator == ( const Degree& d ) const { return mDeg == d.mDeg; } |
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119 | bool operator != ( const Degree& d ) const { return mDeg != d.mDeg; } |
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120 | bool operator >= ( const Degree& d ) const { return mDeg >= d.mDeg; } |
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121 | bool operator > ( const Degree& d ) const { return mDeg > d.mDeg; } |
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122 | }; |
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123 | |
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124 | /** Wrapper class which identifies a value as the currently default angle |
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125 | type, as defined by Math::setAngleUnit. |
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126 | @remarks |
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127 | Angle values will be automatically converted between radians and degrees, |
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128 | as appropriate. |
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129 | */ |
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130 | class Angle |
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131 | { |
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132 | Real mAngle; |
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133 | public: |
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134 | explicit Angle ( Real angle ) : mAngle(angle) {} |
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135 | operator Radian() const; |
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136 | operator Degree() const; |
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137 | }; |
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138 | |
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139 | // these functions could not be defined within the class definition of class |
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140 | // Radian because they required class Degree to be defined |
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141 | inline Radian::Radian ( const Degree& d ) : mRad(d.valueRadians()) { |
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142 | } |
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143 | inline Radian& Radian::operator = ( const Degree& d ) { |
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144 | mRad = d.valueRadians(); return *this; |
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145 | } |
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146 | inline Radian Radian::operator + ( const Degree& d ) const { |
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147 | return Radian ( mRad + d.valueRadians() ); |
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148 | } |
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149 | inline Radian& Radian::operator += ( const Degree& d ) { |
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150 | mRad += d.valueRadians(); |
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151 | return *this; |
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152 | } |
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153 | inline Radian Radian::operator - ( const Degree& d ) const { |
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154 | return Radian ( mRad - d.valueRadians() ); |
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155 | } |
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156 | inline Radian& Radian::operator -= ( const Degree& d ) { |
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157 | mRad -= d.valueRadians(); |
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158 | return *this; |
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159 | } |
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160 | |
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161 | /** Class to provide access to common mathematical functions. |
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162 | @remarks |
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163 | Most of the maths functions are aliased versions of the C runtime |
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164 | library functions. They are aliased here to provide future |
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165 | optimisation opportunities, either from faster RTLs or custom |
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166 | math approximations. |
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167 | @note |
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168 | <br>This is based on MgcMath.h from |
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169 | <a href="http://www.geometrictools.com/">Wild Magic</a>. |
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170 | */ |
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171 | class _OgreExport Math |
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172 | { |
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173 | public: |
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174 | /** The angular units used by the API. This functionality is now deprecated in favor |
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175 | of discreet angular unit types ( see Degree and Radian above ). The only place |
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176 | this functionality is actually still used is when parsing files. Search for |
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177 | usage of the Angle class for those instances |
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178 | */ |
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179 | enum AngleUnit |
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180 | { |
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181 | AU_DEGREE, |
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182 | AU_RADIAN |
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183 | }; |
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184 | |
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185 | protected: |
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186 | // angle units used by the api |
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187 | static AngleUnit msAngleUnit; |
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188 | |
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189 | /// Size of the trig tables as determined by constructor. |
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190 | static int mTrigTableSize; |
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191 | |
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192 | /// Radian -> index factor value ( mTrigTableSize / 2 * PI ) |
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193 | static Real mTrigTableFactor; |
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194 | static Real* mSinTable; |
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195 | static Real* mTanTable; |
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196 | |
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197 | /** Private function to build trig tables. |
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198 | */ |
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199 | void buildTrigTables(); |
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200 | |
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201 | static Real SinTable (Real fValue); |
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202 | static Real TanTable (Real fValue); |
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203 | public: |
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204 | /** Default constructor. |
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205 | @param |
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206 | trigTableSize Optional parameter to set the size of the |
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207 | tables used to implement Sin, Cos, Tan |
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208 | */ |
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209 | Math(unsigned int trigTableSize = 4096); |
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210 | |
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211 | /** Default destructor. |
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212 | */ |
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213 | ~Math(); |
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214 | |
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215 | static inline int IAbs (int iValue) { return ( iValue >= 0 ? iValue : -iValue ); } |
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216 | static inline int ICeil (float fValue) { return int(ceil(fValue)); } |
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217 | static inline int IFloor (float fValue) { return int(floor(fValue)); } |
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218 | static int ISign (int iValue); |
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219 | |
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220 | static inline Real Abs (Real fValue) { return Real(fabs(fValue)); } |
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221 | static inline Degree Abs (const Degree& dValue) { return Degree(fabs(dValue.valueDegrees())); } |
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222 | static inline Radian Abs (const Radian& rValue) { return Radian(fabs(rValue.valueRadians())); } |
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223 | static Radian ACos (Real fValue); |
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224 | static Radian ASin (Real fValue); |
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225 | static inline Radian ATan (Real fValue) { return Radian(atan(fValue)); } |
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226 | static inline Radian ATan2 (Real fY, Real fX) { return Radian(atan2(fY,fX)); } |
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227 | static inline Real Ceil (Real fValue) { return Real(ceil(fValue)); } |
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228 | |
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229 | /** Cosine function. |
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230 | @param |
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231 | fValue Angle in radians |
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232 | @param |
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233 | useTables If true, uses lookup tables rather than |
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234 | calculation - faster but less accurate. |
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235 | */ |
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236 | static inline Real Cos (const Radian& fValue, bool useTables = false) { |
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237 | return (!useTables) ? Real(cos(fValue.valueRadians())) : SinTable(fValue.valueRadians() + HALF_PI); |
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238 | } |
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239 | /** Cosine function. |
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240 | @param |
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241 | fValue Angle in radians |
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242 | @param |
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243 | useTables If true, uses lookup tables rather than |
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244 | calculation - faster but less accurate. |
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245 | */ |
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246 | static inline Real Cos (Real fValue, bool useTables = false) { |
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247 | return (!useTables) ? Real(cos(fValue)) : SinTable(fValue + HALF_PI); |
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248 | } |
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249 | |
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250 | static inline Real Exp (Real fValue) { return Real(exp(fValue)); } |
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251 | |
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252 | static inline Real Floor (Real fValue) { return Real(floor(fValue)); } |
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253 | |
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254 | static inline Real Log (Real fValue) { return Real(log(fValue)); } |
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255 | |
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256 | static inline Real Pow (Real fBase, Real fExponent) { return Real(pow(fBase,fExponent)); } |
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257 | |
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258 | static Real Sign (Real fValue); |
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259 | static inline Radian Sign ( const Radian& rValue ) |
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260 | { |
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261 | return Radian(Sign(rValue.valueRadians())); |
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262 | } |
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263 | static inline Degree Sign ( const Degree& dValue ) |
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264 | { |
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265 | return Degree(Sign(dValue.valueDegrees())); |
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266 | } |
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267 | |
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268 | /** Sine function. |
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269 | @param |
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270 | fValue Angle in radians |
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271 | @param |
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272 | useTables If true, uses lookup tables rather than |
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273 | calculation - faster but less accurate. |
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274 | */ |
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275 | static inline Real Sin (const Radian& fValue, bool useTables = false) { |
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276 | return (!useTables) ? Real(sin(fValue.valueRadians())) : SinTable(fValue.valueRadians()); |
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277 | } |
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278 | /** Sine function. |
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279 | @param |
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280 | fValue Angle in radians |
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281 | @param |
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282 | useTables If true, uses lookup tables rather than |
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283 | calculation - faster but less accurate. |
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284 | */ |
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285 | static inline Real Sin (Real fValue, bool useTables = false) { |
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286 | return (!useTables) ? Real(sin(fValue)) : SinTable(fValue); |
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287 | } |
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288 | |
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289 | static inline Real Sqr (Real fValue) { return fValue*fValue; } |
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290 | |
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291 | static inline Real Sqrt (Real fValue) { return Real(sqrt(fValue)); } |
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292 | |
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293 | static inline Radian Sqrt (const Radian& fValue) { return Radian(sqrt(fValue.valueRadians())); } |
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294 | |
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295 | static inline Degree Sqrt (const Degree& fValue) { return Degree(sqrt(fValue.valueDegrees())); } |
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296 | |
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297 | /** Inverse square root i.e. 1 / Sqrt(x), good for vector |
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298 | normalisation. |
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299 | */ |
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300 | static Real InvSqrt(Real fValue); |
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301 | |
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302 | static Real UnitRandom (); // in [0,1] |
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303 | |
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304 | static Real RangeRandom (Real fLow, Real fHigh); // in [fLow,fHigh] |
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305 | |
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306 | static Real SymmetricRandom (); // in [-1,1] |
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307 | |
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308 | /** Tangent function. |
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309 | @param |
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310 | fValue Angle in radians |
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311 | @param |
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312 | useTables If true, uses lookup tables rather than |
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313 | calculation - faster but less accurate. |
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314 | */ |
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315 | static inline Real Tan (const Radian& fValue, bool useTables = false) { |
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316 | return (!useTables) ? Real(tan(fValue.valueRadians())) : TanTable(fValue.valueRadians()); |
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317 | } |
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318 | /** Tangent function. |
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319 | @param |
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320 | fValue Angle in radians |
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321 | @param |
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322 | useTables If true, uses lookup tables rather than |
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323 | calculation - faster but less accurate. |
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324 | */ |
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325 | static inline Real Tan (Real fValue, bool useTables = false) { |
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326 | return (!useTables) ? Real(tan(fValue)) : TanTable(fValue); |
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327 | } |
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328 | |
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329 | static inline Real DegreesToRadians(Real degrees) { return degrees * fDeg2Rad; } |
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330 | static inline Real RadiansToDegrees(Real radians) { return radians * fRad2Deg; } |
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331 | |
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332 | /** These functions used to set the assumed angle units (radians or degrees) |
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333 | expected when using the Angle type. |
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334 | @par |
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335 | You can set this directly after creating a new Root, and also before/after resource creation, |
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336 | depending on whether you want the change to affect resource files. |
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337 | */ |
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338 | static void setAngleUnit(AngleUnit unit); |
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339 | /** Get the unit being used for angles. */ |
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340 | static AngleUnit getAngleUnit(void); |
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341 | |
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342 | /** Convert from the current AngleUnit to radians. */ |
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343 | static Real AngleUnitsToRadians(Real units); |
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344 | /** Convert from radians to the current AngleUnit . */ |
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345 | static Real RadiansToAngleUnits(Real radians); |
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346 | /** Convert from the current AngleUnit to degrees. */ |
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347 | static Real AngleUnitsToDegrees(Real units); |
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348 | /** Convert from degrees to the current AngleUnit. */ |
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349 | static Real DegreesToAngleUnits(Real degrees); |
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350 | |
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351 | /** Checks whether a given point is inside a triangle, in a |
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352 | 2-dimensional (Cartesian) space. |
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353 | @remarks |
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354 | The vertices of the triangle must be given in either |
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355 | trigonometrical (anticlockwise) or inverse trigonometrical |
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356 | (clockwise) order. |
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357 | @param |
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358 | p The point. |
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359 | @param |
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360 | a The triangle's first vertex. |
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361 | @param |
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362 | b The triangle's second vertex. |
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363 | @param |
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364 | c The triangle's third vertex. |
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365 | @returns |
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366 | If the point resides in the triangle, <b>true</b> is |
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367 | returned. |
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368 | @par |
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369 | If the point is outside the triangle, <b>false</b> is |
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370 | returned. |
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371 | */ |
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372 | static bool pointInTri2D(const Vector2& p, const Vector2& a, |
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373 | const Vector2& b, const Vector2& c); |
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374 | |
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375 | /** Checks whether a given 3D point is inside a triangle. |
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376 | @remarks |
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377 | The vertices of the triangle must be given in either |
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378 | trigonometrical (anticlockwise) or inverse trigonometrical |
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379 | (clockwise) order, and the point must be guaranteed to be in the |
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380 | same plane as the triangle |
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381 | @param |
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382 | p The point. |
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383 | @param |
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384 | a The triangle's first vertex. |
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385 | @param |
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386 | b The triangle's second vertex. |
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387 | @param |
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388 | c The triangle's third vertex. |
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389 | @param |
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390 | normal The triangle plane's normal (passed in rather than calculated |
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391 | on demand since the callermay already have it) |
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392 | @returns |
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393 | If the point resides in the triangle, <b>true</b> is |
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394 | returned. |
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395 | @par |
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396 | If the point is outside the triangle, <b>false</b> is |
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397 | returned. |
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398 | */ |
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399 | static bool pointInTri3D(const Vector3& p, const Vector3& a, |
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400 | const Vector3& b, const Vector3& c, const Vector3& normal); |
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401 | /** Ray / plane intersection, returns boolean result and distance. */ |
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402 | static std::pair<bool, Real> intersects(const Ray& ray, const Plane& plane); |
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403 | |
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404 | /** Ray / sphere intersection, returns boolean result and distance. */ |
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405 | static std::pair<bool, Real> intersects(const Ray& ray, const Sphere& sphere, |
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406 | bool discardInside = true); |
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407 | |
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408 | /** Ray / box intersection, returns boolean result and distance. */ |
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409 | static std::pair<bool, Real> intersects(const Ray& ray, const AxisAlignedBox& box); |
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410 | |
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411 | /** Ray / box intersection, returns boolean result and two intersection distance. |
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412 | @param |
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413 | ray The ray. |
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414 | @param |
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415 | box The box. |
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416 | @param |
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417 | d1 A real pointer to retrieve the near intersection distance |
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418 | from the ray origin, maybe <b>null</b> which means don't care |
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419 | about the near intersection distance. |
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420 | @param |
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421 | d2 A real pointer to retrieve the far intersection distance |
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422 | from the ray origin, maybe <b>null</b> which means don't care |
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423 | about the far intersection distance. |
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424 | @returns |
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425 | If the ray is intersects the box, <b>true</b> is returned, and |
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426 | the near intersection distance is return by <i>d1</i>, the |
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427 | far intersection distance is return by <i>d2</i>. Guarantee |
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428 | <b>0</b> <= <i>d1</i> <= <i>d2</i>. |
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429 | @par |
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430 | If the ray isn't intersects the box, <b>false</b> is returned, and |
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431 | <i>d1</i> and <i>d2</i> is unmodified. |
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432 | */ |
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433 | static bool intersects(const Ray& ray, const AxisAlignedBox& box, |
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434 | Real* d1, Real* d2); |
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435 | |
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436 | /** Ray / triangle intersection, returns boolean result and distance. |
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437 | @param |
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438 | ray The ray. |
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439 | @param |
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440 | a The triangle's first vertex. |
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441 | @param |
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442 | b The triangle's second vertex. |
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443 | @param |
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444 | c The triangle's third vertex. |
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445 | @param |
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446 | normal The triangle plane's normal (passed in rather than calculated |
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447 | on demand since the callermay already have it), doesn't need |
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448 | normalised since we don't care. |
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449 | @param |
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450 | positiveSide Intersect with "positive side" of the triangle |
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451 | @param |
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452 | negativeSide Intersect with "negative side" of the triangle |
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453 | @returns |
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454 | If the ray is intersects the triangle, a pair of <b>true</b> and the |
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455 | distance between intersection point and ray origin returned. |
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456 | @par |
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457 | If the ray isn't intersects the triangle, a pair of <b>false</b> and |
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458 | <b>0</b> returned. |
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459 | */ |
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460 | static std::pair<bool, Real> intersects(const Ray& ray, const Vector3& a, |
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461 | const Vector3& b, const Vector3& c, const Vector3& normal, |
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462 | bool positiveSide = true, bool negativeSide = true); |
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463 | |
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464 | /** Ray / triangle intersection, returns boolean result and distance. |
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465 | @param |
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466 | ray The ray. |
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467 | @param |
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468 | a The triangle's first vertex. |
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469 | @param |
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470 | b The triangle's second vertex. |
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471 | @param |
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472 | c The triangle's third vertex. |
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473 | @param |
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474 | positiveSide Intersect with "positive side" of the triangle |
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475 | @param |
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476 | negativeSide Intersect with "negative side" of the triangle |
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477 | @returns |
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478 | If the ray is intersects the triangle, a pair of <b>true</b> and the |
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479 | distance between intersection point and ray origin returned. |
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480 | @par |
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481 | If the ray isn't intersects the triangle, a pair of <b>false</b> and |
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482 | <b>0</b> returned. |
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483 | */ |
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484 | static std::pair<bool, Real> intersects(const Ray& ray, const Vector3& a, |
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485 | const Vector3& b, const Vector3& c, |
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486 | bool positiveSide = true, bool negativeSide = true); |
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487 | |
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488 | /** Sphere / box intersection test. */ |
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489 | static bool intersects(const Sphere& sphere, const AxisAlignedBox& box); |
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490 | |
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491 | /** Plane / box intersection test. */ |
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492 | static bool intersects(const Plane& plane, const AxisAlignedBox& box); |
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493 | |
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494 | /** Ray / convex plane list intersection test. |
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495 | @param ray The ray to test with |
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496 | @param plaeList List of planes which form a convex volume |
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497 | @param normalIsOutside Does the normal point outside the volume |
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498 | */ |
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499 | static std::pair<bool, Real> intersects( |
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500 | const Ray& ray, const std::vector<Plane>& planeList, |
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501 | bool normalIsOutside); |
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502 | /** Ray / convex plane list intersection test. |
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503 | @param ray The ray to test with |
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504 | @param plaeList List of planes which form a convex volume |
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505 | @param normalIsOutside Does the normal point outside the volume |
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506 | */ |
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507 | static std::pair<bool, Real> intersects( |
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508 | const Ray& ray, const std::list<Plane>& planeList, |
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509 | bool normalIsOutside); |
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510 | |
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511 | /** Sphere / plane intersection test. |
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512 | @remarks NB just do a plane.getDistance(sphere.getCenter()) for more detail! |
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513 | */ |
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514 | static bool intersects(const Sphere& sphere, const Plane& plane); |
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515 | |
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516 | /** Compare 2 reals, using tolerance for inaccuracies. |
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517 | */ |
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518 | static bool RealEqual(Real a, Real b, |
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519 | Real tolerance = std::numeric_limits<Real>::epsilon()); |
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520 | |
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521 | /** Calculates the tangent space vector for a given set of positions / texture coords. */ |
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522 | static Vector3 calculateTangentSpaceVector( |
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523 | const Vector3& position1, const Vector3& position2, const Vector3& position3, |
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524 | Real u1, Real v1, Real u2, Real v2, Real u3, Real v3); |
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525 | |
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526 | /** Build a reflection matrix for the passed in plane. */ |
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527 | static Matrix4 buildReflectionMatrix(const Plane& p); |
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528 | /** Calculate a face normal, including the w component which is the offset from the origin. */ |
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529 | static Vector4 calculateFaceNormal(const Vector3& v1, const Vector3& v2, const Vector3& v3); |
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530 | /** Calculate a face normal, no w-information. */ |
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531 | static Vector3 calculateBasicFaceNormal(const Vector3& v1, const Vector3& v2, const Vector3& v3); |
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532 | /** Calculate a face normal without normalize, including the w component which is the offset from the origin. */ |
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533 | static Vector4 calculateFaceNormalWithoutNormalize(const Vector3& v1, const Vector3& v2, const Vector3& v3); |
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534 | /** Calculate a face normal without normalize, no w-information. */ |
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535 | static Vector3 calculateBasicFaceNormalWithoutNormalize(const Vector3& v1, const Vector3& v2, const Vector3& v3); |
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536 | |
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537 | /** Generates a value based on the gaussian (normal) distribution function |
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538 | with the given offset and scale parameters. |
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539 | */ |
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540 | static Real gaussianDistribution(Real x, Real offset = 0.0f, Real scale = 1.0f); |
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541 | |
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542 | static const Real POS_INFINITY; |
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543 | static const Real NEG_INFINITY; |
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544 | static const Real PI; |
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545 | static const Real TWO_PI; |
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546 | static const Real HALF_PI; |
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547 | static const Real fDeg2Rad; |
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548 | static const Real fRad2Deg; |
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549 | |
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550 | }; |
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551 | |
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552 | // these functions must be defined down here, because they rely on the |
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553 | // angle unit conversion functions in class Math: |
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554 | |
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555 | inline Real Radian::valueDegrees() const |
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556 | { |
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557 | return Math::RadiansToDegrees ( mRad ); |
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558 | } |
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559 | |
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560 | inline Real Radian::valueAngleUnits() const |
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561 | { |
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562 | return Math::RadiansToAngleUnits ( mRad ); |
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563 | } |
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564 | |
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565 | inline Real Degree::valueRadians() const |
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566 | { |
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567 | return Math::DegreesToRadians ( mDeg ); |
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568 | } |
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569 | |
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570 | inline Real Degree::valueAngleUnits() const |
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571 | { |
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572 | return Math::DegreesToAngleUnits ( mDeg ); |
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573 | } |
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574 | |
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575 | inline Angle::operator Radian() const |
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576 | { |
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577 | return Radian(Math::AngleUnitsToRadians(mAngle)); |
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578 | } |
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579 | |
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580 | inline Angle::operator Degree() const |
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581 | { |
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582 | return Degree(Math::AngleUnitsToDegrees(mAngle)); |
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583 | } |
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584 | |
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585 | inline Radian operator * ( Real a, const Radian& b ) |
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586 | { |
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587 | return Radian ( a * b.valueRadians() ); |
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588 | } |
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589 | |
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590 | inline Radian operator / ( Real a, const Radian& b ) |
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591 | { |
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592 | return Radian ( a / b.valueRadians() ); |
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593 | } |
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594 | |
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595 | inline Degree operator * ( Real a, const Degree& b ) |
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596 | { |
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597 | return Degree ( a * b.valueDegrees() ); |
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598 | } |
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599 | |
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600 | inline Degree operator / ( Real a, const Degree& b ) |
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601 | { |
---|
602 | return Degree ( a / b.valueDegrees() ); |
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603 | } |
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604 | |
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605 | } |
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606 | #endif |
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