[5789] | 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 | #include <cassert> |
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| 35 | #include <cmath> |
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| 36 | #include <vector> |
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| 37 | #include <utility> |
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| 38 | #include <list> |
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| 39 | #include <limits> |
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| 40 | |
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| 41 | namespace Ogre |
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| 42 | { |
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| 43 | /** Wrapper class which indicates a given angle value is in Radians. |
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| 44 | @remarks |
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| 45 | Radian values are interchangeable with Degree values, and conversions |
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| 46 | will be done automatically between them. |
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| 47 | */ |
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| 48 | class Radian |
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| 49 | { |
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| 50 | Real mRad; |
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| 51 | |
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| 52 | public: |
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| 53 | explicit Radian ( Real r=0 ) : mRad(r) {} |
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| 54 | Radian ( const Degree& d ); |
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| 55 | Radian& operator = ( const Real& f ) { mRad = f; return *this; } |
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| 56 | Radian& operator = ( const Radian& r ) { mRad = r.mRad; return *this; } |
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| 57 | Radian& operator = ( const Degree& d ); |
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| 58 | |
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| 59 | Real valueDegrees() const; // see bottom of this file |
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| 60 | Real valueRadians() const { return mRad; } |
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| 61 | Real valueAngleUnits() const; |
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| 62 | |
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| 63 | const Radian& operator + () const { return *this; } |
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| 64 | Radian operator + ( const Radian& r ) const { return Radian ( mRad + r.mRad ); } |
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| 65 | Radian operator + ( const Degree& d ) const; |
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| 66 | Radian& operator += ( const Radian& r ) { mRad += r.mRad; return *this; } |
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| 67 | Radian& operator += ( const Degree& d ); |
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| 68 | Radian operator - () const { return Radian(-mRad); } |
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| 69 | Radian operator - ( const Radian& r ) const { return Radian ( mRad - r.mRad ); } |
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| 70 | Radian operator - ( const Degree& d ) const; |
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| 71 | Radian& operator -= ( const Radian& r ) { mRad -= r.mRad; return *this; } |
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| 72 | Radian& operator -= ( const Degree& d ); |
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| 73 | Radian operator * ( Real f ) const { return Radian ( mRad * f ); } |
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| 74 | Radian operator * ( const Radian& f ) const { return Radian ( mRad * f.mRad ); } |
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| 75 | Radian& operator *= ( Real f ) { mRad *= f; return *this; } |
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| 76 | Radian operator / ( Real f ) const { return Radian ( mRad / f ); } |
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| 77 | Radian& operator /= ( Real f ) { mRad /= f; return *this; } |
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| 78 | |
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| 79 | bool operator < ( const Radian& r ) const { return mRad < r.mRad; } |
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| 80 | bool operator <= ( const Radian& r ) const { return mRad <= r.mRad; } |
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| 81 | bool operator == ( const Radian& r ) const { return mRad == r.mRad; } |
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| 82 | bool operator != ( const Radian& r ) const { return mRad != r.mRad; } |
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| 83 | bool operator >= ( const Radian& r ) const { return mRad >= r.mRad; } |
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| 84 | bool operator > ( const Radian& r ) const { return mRad > r.mRad; } |
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| 85 | }; |
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| 86 | |
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| 87 | /** Wrapper class which indicates a given angle value is in Degrees. |
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| 88 | @remarks |
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| 89 | Degree values are interchangeable with Radian values, and conversions |
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| 90 | will be done automatically between them. |
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| 91 | */ |
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| 92 | class Degree |
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| 93 | { |
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| 94 | Real mDeg; // if you get an error here - make sure to define/typedef 'Real' first |
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| 95 | |
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| 96 | public: |
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| 97 | explicit Degree ( Real d=0 ) : mDeg(d) {} |
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| 98 | Degree ( const Radian& r ) : mDeg(r.valueDegrees()) {} |
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| 99 | Degree& operator = ( const Real& f ) { mDeg = f; return *this; } |
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| 100 | Degree& operator = ( const Degree& d ) { mDeg = d.mDeg; return *this; } |
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| 101 | Degree& operator = ( const Radian& r ) { mDeg = r.valueDegrees(); return *this; } |
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| 102 | |
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| 103 | Real valueDegrees() const { return mDeg; } |
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| 104 | Real valueRadians() const; // see bottom of this file |
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| 105 | Real valueAngleUnits() const; |
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| 106 | |
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| 107 | const Degree& operator + () const { return *this; } |
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| 108 | Degree operator + ( const Degree& d ) const { return Degree ( mDeg + d.mDeg ); } |
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| 109 | Degree operator + ( const Radian& r ) const { return Degree ( mDeg + r.valueDegrees() ); } |
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| 110 | Degree& operator += ( const Degree& d ) { mDeg += d.mDeg; return *this; } |
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| 111 | Degree& operator += ( const Radian& r ) { mDeg += r.valueDegrees(); return *this; } |
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| 112 | Degree operator - () const { return Degree(-mDeg); } |
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| 113 | Degree operator - ( const Degree& d ) const { return Degree ( mDeg - d.mDeg ); } |
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| 114 | Degree operator - ( const Radian& r ) const { return Degree ( mDeg - r.valueDegrees() ); } |
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| 115 | Degree& operator -= ( const Degree& d ) { mDeg -= d.mDeg; return *this; } |
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| 116 | Degree& operator -= ( const Radian& r ) { mDeg -= r.valueDegrees(); return *this; } |
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| 117 | Degree operator * ( Real f ) const { return Degree ( mDeg * f ); } |
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| 118 | Degree operator * ( const Degree& f ) const { return Degree ( mDeg * f.mDeg ); } |
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| 119 | Degree& operator *= ( Real f ) { mDeg *= f; return *this; } |
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| 120 | Degree operator / ( Real f ) const { return Degree ( mDeg / f ); } |
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| 121 | Degree& operator /= ( Real f ) { mDeg /= f; return *this; } |
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| 122 | |
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| 123 | bool operator < ( const Degree& d ) const { return mDeg < d.mDeg; } |
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| 124 | bool operator <= ( const Degree& d ) const { return mDeg <= d.mDeg; } |
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| 125 | bool operator == ( const Degree& d ) const { return mDeg == d.mDeg; } |
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| 126 | bool operator != ( const Degree& d ) const { return mDeg != d.mDeg; } |
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| 127 | bool operator >= ( const Degree& d ) const { return mDeg >= d.mDeg; } |
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| 128 | bool operator > ( const Degree& d ) const { return mDeg > d.mDeg; } |
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| 129 | }; |
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| 130 | |
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| 131 | /** Wrapper class which identifies a value as the currently default angle |
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| 132 | type, as defined by Math::setAngleUnit. |
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| 133 | @remarks |
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| 134 | Angle values will be automatically converted between radians and degrees, |
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| 135 | as appropriate. |
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| 136 | */ |
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| 137 | class Angle |
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| 138 | { |
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| 139 | Real mAngle; |
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| 140 | public: |
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| 141 | explicit Angle ( Real angle ) : mAngle(angle) {} |
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| 142 | operator Radian() const; |
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| 143 | operator Degree() const; |
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| 144 | }; |
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| 145 | |
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| 146 | // these functions could not be defined within the class definition of class |
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| 147 | // Radian because they required class Degree to be defined |
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| 148 | inline Radian::Radian ( const Degree& d ) : mRad(d.valueRadians()) { |
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| 149 | } |
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| 150 | inline Radian& Radian::operator = ( const Degree& d ) { |
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| 151 | mRad = d.valueRadians(); 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 | inline Radian Radian::operator - ( const Degree& d ) const { |
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| 161 | return Radian ( mRad - d.valueRadians() ); |
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| 162 | } |
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| 163 | inline Radian& Radian::operator -= ( const Degree& d ) { |
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| 164 | mRad -= d.valueRadians(); |
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| 165 | return *this; |
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| 166 | } |
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| 167 | |
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| 168 | /** Class to provide access to common mathematical functions. |
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| 169 | @remarks |
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| 170 | Most of the maths functions are aliased versions of the C runtime |
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| 171 | library functions. They are aliased here to provide future |
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| 172 | optimisation opportunities, either from faster RTLs or custom |
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| 173 | math approximations. |
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| 174 | @note |
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| 175 | <br>This is based on MgcMath.h from |
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| 176 | <a href="http://www.geometrictools.com/">Wild Magic</a>. |
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| 177 | */ |
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| 178 | class _OgreExport Math |
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| 179 | { |
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| 180 | public: |
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| 181 | /** The angular units used by the API. This functionality is now deprecated in favor |
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| 182 | of discreet angular unit types ( see Degree and Radian above ). The only place |
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| 183 | this functionality is actually still used is when parsing files. Search for |
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| 184 | usage of the Angle class for those instances |
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| 185 | */ |
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| 186 | enum AngleUnit |
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| 187 | { |
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| 188 | AU_DEGREE, |
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| 189 | AU_RADIAN |
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| 190 | }; |
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| 191 | |
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| 192 | protected: |
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| 193 | // angle units used by the api |
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| 194 | static AngleUnit msAngleUnit; |
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| 195 | |
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| 196 | /// Size of the trig tables as determined by constructor. |
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| 197 | static int mTrigTableSize; |
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| 198 | |
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| 199 | /// Radian -> index factor value ( mTrigTableSize / 2 * PI ) |
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| 200 | static Real mTrigTableFactor; |
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| 201 | static Real* mSinTable; |
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| 202 | static Real* mTanTable; |
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| 203 | |
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| 204 | /** Private function to build trig tables. |
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| 205 | */ |
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| 206 | void buildTrigTables(); |
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| 207 | |
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| 208 | static Real SinTable (Real fValue); |
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| 209 | static Real TanTable (Real fValue); |
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| 210 | public: |
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| 211 | /** Default constructor. |
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| 212 | @param |
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| 213 | trigTableSize Optional parameter to set the size of the |
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| 214 | tables used to implement Sin, Cos, Tan |
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| 215 | */ |
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| 216 | Math(unsigned int trigTableSize = 4096); |
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| 217 | |
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| 218 | /** Default destructor. |
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| 219 | */ |
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| 220 | ~Math(); |
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| 221 | |
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| 222 | static inline int IAbs (int iValue) { return ( iValue >= 0 ? iValue : -iValue ); } |
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| 223 | static inline int ICeil (float fValue) { return int(ceil(fValue)); } |
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| 224 | static inline int IFloor (float fValue) { return int(floor(fValue)); } |
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| 225 | static int ISign (int iValue); |
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| 226 | |
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| 227 | static inline Real Abs (Real fValue) { return Real(fabs(fValue)); } |
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| 228 | static inline Degree Abs (const Degree& dValue) { return Degree(fabs(dValue.valueDegrees())); } |
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| 229 | static inline Radian Abs (const Radian& rValue) { return Radian(fabs(rValue.valueRadians())); } |
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| 230 | static Radian ACos (Real fValue); |
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| 231 | static Radian ASin (Real fValue); |
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| 232 | static inline Radian ATan (Real fValue) { return Radian(atan(fValue)); } |
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| 233 | static inline Radian ATan2 (Real fY, Real fX) { return Radian(atan2(fY,fX)); } |
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| 234 | static inline Real Ceil (Real fValue) { return Real(ceil(fValue)); } |
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| 235 | |
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| 236 | /** Cosine function. |
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| 237 | @param |
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| 238 | fValue Angle in radians |
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| 239 | @param |
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| 240 | useTables If true, uses lookup tables rather than |
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| 241 | calculation - faster but less accurate. |
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| 242 | */ |
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| 243 | static inline Real Cos (const Radian& fValue, bool useTables = false) { |
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| 244 | return (!useTables) ? Real(cos(fValue.valueRadians())) : SinTable(fValue.valueRadians() + HALF_PI); |
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| 245 | } |
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| 246 | /** Cosine function. |
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| 247 | @param |
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| 248 | fValue Angle in radians |
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| 249 | @param |
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| 250 | useTables If true, uses lookup tables rather than |
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| 251 | calculation - faster but less accurate. |
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| 252 | */ |
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| 253 | static inline Real Cos (Real fValue, bool useTables = false) { |
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| 254 | return (!useTables) ? Real(cos(fValue)) : SinTable(fValue + HALF_PI); |
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| 255 | } |
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| 256 | |
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| 257 | static inline Real Exp (Real fValue) { return Real(exp(fValue)); } |
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| 258 | |
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| 259 | static inline Real Floor (Real fValue) { return Real(floor(fValue)); } |
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| 260 | |
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| 261 | static inline Real Log (Real fValue) { return Real(log(fValue)); } |
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| 262 | |
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| 263 | static inline Real Pow (Real fBase, Real fExponent) { return Real(pow(fBase,fExponent)); } |
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| 264 | |
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| 265 | static Real Sign (Real fValue); |
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| 266 | static inline Radian Sign ( const Radian& rValue ) |
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| 267 | { |
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| 268 | return Radian(Sign(rValue.valueRadians())); |
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| 269 | } |
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| 270 | static inline Degree Sign ( const Degree& dValue ) |
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| 271 | { |
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| 272 | return Degree(Sign(dValue.valueDegrees())); |
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| 273 | } |
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| 274 | |
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| 275 | /** Sine function. |
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| 276 | @param |
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| 277 | fValue Angle in radians |
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| 278 | @param |
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| 279 | useTables If true, uses lookup tables rather than |
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| 280 | calculation - faster but less accurate. |
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| 281 | */ |
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| 282 | static inline Real Sin (const Radian& fValue, bool useTables = false) { |
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| 283 | return (!useTables) ? Real(sin(fValue.valueRadians())) : SinTable(fValue.valueRadians()); |
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| 284 | } |
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| 285 | /** Sine function. |
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| 286 | @param |
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| 287 | fValue Angle in radians |
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| 288 | @param |
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| 289 | useTables If true, uses lookup tables rather than |
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| 290 | calculation - faster but less accurate. |
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| 291 | */ |
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| 292 | static inline Real Sin (Real fValue, bool useTables = false) { |
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| 293 | return (!useTables) ? Real(sin(fValue)) : SinTable(fValue); |
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| 294 | } |
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| 295 | |
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| 296 | static inline Real Sqr (Real fValue) { return fValue*fValue; } |
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| 297 | |
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| 298 | static inline Real Sqrt (Real fValue) { return Real(sqrt(fValue)); } |
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| 299 | |
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| 300 | static inline Radian Sqrt (const Radian& fValue) { return Radian(sqrt(fValue.valueRadians())); } |
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| 301 | |
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| 302 | static inline Degree Sqrt (const Degree& fValue) { return Degree(sqrt(fValue.valueDegrees())); } |
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| 303 | |
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| 304 | /** Inverse square root i.e. 1 / Sqrt(x), good for vector |
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| 305 | normalisation. |
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| 306 | */ |
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| 307 | static Real InvSqrt(Real fValue); |
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| 308 | |
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| 309 | static Real UnitRandom (); // in [0,1] |
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| 310 | |
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| 311 | static Real RangeRandom (Real fLow, Real fHigh); // in [fLow,fHigh] |
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| 312 | |
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| 313 | static Real SymmetricRandom (); // in [-1,1] |
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| 314 | |
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| 315 | /** Tangent function. |
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| 316 | @param |
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| 317 | fValue Angle in radians |
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| 318 | @param |
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| 319 | useTables If true, uses lookup tables rather than |
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| 320 | calculation - faster but less accurate. |
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| 321 | */ |
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| 322 | static inline Real Tan (const Radian& fValue, bool useTables = false) { |
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| 323 | return (!useTables) ? Real(tan(fValue.valueRadians())) : TanTable(fValue.valueRadians()); |
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| 324 | } |
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| 325 | /** Tangent function. |
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| 326 | @param |
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| 327 | fValue Angle in radians |
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| 328 | @param |
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| 329 | useTables If true, uses lookup tables rather than |
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| 330 | calculation - faster but less accurate. |
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| 331 | */ |
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| 332 | static inline Real Tan (Real fValue, bool useTables = false) { |
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| 333 | return (!useTables) ? Real(tan(fValue)) : TanTable(fValue); |
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| 334 | } |
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| 335 | |
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| 336 | static inline Real DegreesToRadians(Real degrees) { return degrees * fDeg2Rad; } |
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| 337 | static inline Real RadiansToDegrees(Real radians) { return radians * fRad2Deg; } |
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| 338 | |
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| 339 | /** These functions used to set the assumed angle units (radians or degrees) |
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| 340 | expected when using the Angle type. |
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| 341 | @par |
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| 342 | You can set this directly after creating a new Root, and also before/after resource creation, |
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| 343 | depending on whether you want the change to affect resource files. |
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| 344 | */ |
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| 345 | static void setAngleUnit(AngleUnit unit); |
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| 346 | /** Get the unit being used for angles. */ |
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| 347 | static AngleUnit getAngleUnit(void); |
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| 348 | |
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| 349 | /** Convert from the current AngleUnit to radians. */ |
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| 350 | static Real AngleUnitsToRadians(Real units); |
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| 351 | /** Convert from radians to the current AngleUnit . */ |
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| 352 | static Real RadiansToAngleUnits(Real radians); |
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| 353 | /** Convert from the current AngleUnit to degrees. */ |
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| 354 | static Real AngleUnitsToDegrees(Real units); |
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| 355 | /** Convert from degrees to the current AngleUnit. */ |
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| 356 | static Real DegreesToAngleUnits(Real degrees); |
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| 357 | |
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| 358 | /** Checks whether a given point is inside a triangle, in a |
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| 359 | 2-dimensional (Cartesian) space. |
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| 360 | @remarks |
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| 361 | The vertices of the triangle must be given in either |
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| 362 | trigonometrical (anticlockwise) or inverse trigonometrical |
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| 363 | (clockwise) order. |
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| 364 | @param |
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| 365 | p The point. |
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| 366 | @param |
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| 367 | a The triangle's first vertex. |
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| 368 | @param |
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| 369 | b The triangle's second vertex. |
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| 370 | @param |
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| 371 | c The triangle's third vertex. |
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| 372 | @returns |
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| 373 | If the point resides in the triangle, <b>true</b> is |
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| 374 | returned. |
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| 375 | @par |
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| 376 | If the point is outside the triangle, <b>false</b> is |
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| 377 | returned. |
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| 378 | */ |
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| 379 | static bool pointInTri2D(const Vector2& p, const Vector2& a, |
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| 380 | const Vector2& b, const Vector2& c); |
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| 381 | |
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| 382 | /** Checks whether a given 3D point is inside a triangle. |
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| 383 | @remarks |
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| 384 | The vertices of the triangle must be given in either |
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| 385 | trigonometrical (anticlockwise) or inverse trigonometrical |
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| 386 | (clockwise) order, and the point must be guaranteed to be in the |
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| 387 | same plane as the triangle |
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| 388 | @param |
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| 389 | p The point. |
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| 390 | @param |
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| 391 | a The triangle's first vertex. |
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| 392 | @param |
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| 393 | b The triangle's second vertex. |
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| 394 | @param |
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| 395 | c The triangle's third vertex. |
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| 396 | @param |
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| 397 | normal The triangle plane's normal (passed in rather than calculated |
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| 398 | on demand since the caller may already have it) |
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| 399 | @returns |
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| 400 | If the point resides in the triangle, <b>true</b> is |
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| 401 | returned. |
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| 402 | @par |
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| 403 | If the point is outside the triangle, <b>false</b> is |
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| 404 | returned. |
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| 405 | */ |
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| 406 | static bool pointInTri3D(const Vector3& p, const Vector3& a, |
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| 407 | const Vector3& b, const Vector3& c, const Vector3& normal); |
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| 408 | |
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| 409 | /** Compare 2 reals, using tolerance for inaccuracies. |
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| 410 | */ |
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| 411 | static bool RealEqual(Real a, Real b, |
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| 412 | Real tolerance = std::numeric_limits<Real>::epsilon()); |
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| 413 | |
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| 414 | /** Calculates the tangent space vector for a given set of positions / texture coords. */ |
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| 415 | static Vector3 calculateTangentSpaceVector( |
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| 416 | const Vector3& position1, const Vector3& position2, const Vector3& position3, |
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| 417 | Real u1, Real v1, Real u2, Real v2, Real u3, Real v3); |
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| 418 | |
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| 419 | /** Calculate a face normal, including the w component which is the offset from the origin. */ |
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| 420 | static Vector4 calculateFaceNormal(const Vector3& v1, const Vector3& v2, const Vector3& v3); |
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| 421 | /** Calculate a face normal, no w-information. */ |
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| 422 | static Vector3 calculateBasicFaceNormal(const Vector3& v1, const Vector3& v2, const Vector3& v3); |
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| 423 | /** Calculate a face normal without normalize, including the w component which is the offset from the origin. */ |
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| 424 | static Vector4 calculateFaceNormalWithoutNormalize(const Vector3& v1, const Vector3& v2, const Vector3& v3); |
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| 425 | /** Calculate a face normal without normalize, no w-information. */ |
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| 426 | static Vector3 calculateBasicFaceNormalWithoutNormalize(const Vector3& v1, const Vector3& v2, const Vector3& v3); |
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| 427 | |
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| 428 | /** Generates a value based on the Gaussian (normal) distribution function |
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| 429 | with the given offset and scale parameters. |
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| 430 | */ |
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| 431 | static Real gaussianDistribution(Real x, Real offset = 0.0f, Real scale = 1.0f); |
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| 432 | |
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| 433 | /** Clamp a value within an inclusive range. */ |
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| 434 | template <typename T> |
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| 435 | static T Clamp(T val, T minval, T maxval) |
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| 436 | { |
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| 437 | assert (minval < maxval && "Invalid clamp range"); |
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| 438 | return std::max(std::min(val, maxval), minval); |
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| 439 | } |
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| 440 | |
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| 441 | static Matrix4 makeViewMatrix(const Vector3& position, const Quaternion& orientation, |
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| 442 | const Matrix4* reflectMatrix = 0); |
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| 443 | |
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| 444 | |
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| 445 | |
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| 446 | static const Real POS_INFINITY; |
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| 447 | static const Real NEG_INFINITY; |
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| 448 | static const Real PI; |
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| 449 | static const Real TWO_PI; |
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| 450 | static const Real HALF_PI; |
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| 451 | static const Real fDeg2Rad; |
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| 452 | static const Real fRad2Deg; |
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| 453 | |
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| 454 | }; |
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| 455 | |
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| 456 | // these functions must be defined down here, because they rely on the |
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| 457 | // angle unit conversion functions in class Math: |
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| 458 | |
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| 459 | inline Real Radian::valueDegrees() const |
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| 460 | { |
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| 461 | return Math::RadiansToDegrees ( mRad ); |
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| 462 | } |
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| 463 | |
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| 464 | inline Real Radian::valueAngleUnits() const |
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| 465 | { |
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| 466 | return Math::RadiansToAngleUnits ( mRad ); |
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| 467 | } |
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| 468 | |
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| 469 | inline Real Degree::valueRadians() const |
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| 470 | { |
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| 471 | return Math::DegreesToRadians ( mDeg ); |
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| 472 | } |
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| 473 | |
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| 474 | inline Real Degree::valueAngleUnits() const |
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| 475 | { |
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| 476 | return Math::DegreesToAngleUnits ( mDeg ); |
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| 477 | } |
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| 478 | |
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| 479 | inline Angle::operator Radian() const |
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| 480 | { |
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| 481 | return Radian(Math::AngleUnitsToRadians(mAngle)); |
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| 482 | } |
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| 483 | |
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| 484 | inline Angle::operator Degree() const |
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| 485 | { |
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| 486 | return Degree(Math::AngleUnitsToDegrees(mAngle)); |
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| 487 | } |
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| 488 | |
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| 489 | inline Radian operator * ( Real a, const Radian& b ) |
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| 490 | { |
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| 491 | return Radian ( a * b.valueRadians() ); |
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| 492 | } |
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| 493 | |
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| 494 | inline Radian operator / ( Real a, const Radian& b ) |
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| 495 | { |
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| 496 | return Radian ( a / b.valueRadians() ); |
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| 497 | } |
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| 498 | |
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| 499 | inline Degree operator * ( Real a, const Degree& b ) |
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| 500 | { |
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| 501 | return Degree ( a * b.valueDegrees() ); |
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| 502 | } |
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| 503 | |
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| 504 | inline Degree operator / ( Real a, const Degree& b ) |
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| 505 | { |
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| 506 | return Degree ( a / b.valueDegrees() ); |
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| 507 | } |
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| 508 | |
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| 509 | } |
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| 510 | #endif |
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