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  1. const double Pi                    = 3.14159265358979323846264;
  2. const double TWO_Pi                = Pi*2.0;
  3. const double HALF_Pi            = Pi/2.0;
  4. const double QUARTER_Pi            = Pi/4.0;
  5. const double Deg2Rad            = Pi/180.0;
  6. const double Rad2Deg            = 180.0/Pi;
  7. const float  fDeg2Rad            = static_cast(Deg2Rad);
  8. const float  fRad2Deg            = static_cast(Rad2Deg);
  9. const double OneThird            = 1.0/3.0;
  10. const double One3point6th        = 1.0/3.6;
  11. const double OneTwelfth            = 1.0/12.0;
  12. const double OneThirtysixth        = 1.0/36.0;
  13. const double One1760th            = 1.0/1760;
  14. const double One5280th            = 1.0/5280;
  15. const double One63360th            = 1.0/63360.0;
  16. const double One25Pt4th            = 1.0/25.4;                // 0.0393700787401575        mm -> inches
  17. const double One2Pt54th            = 1.0/2.54;                // 0.393700787401575        cm -> inches
  18. const double OnePt0254th        = 1.0/0.0254;            // 39.3700787401575            m  -> inches
  19. const double OnePt0000254th        = 1.0/0.0000254;        // 39370.0787401575            km -> inches
  20. const double One2Pt20462262185th= 1.0/2.20462262185;    // 0.453592369999748        Lbs-> Kg
  21. const double One304Pt8th        = 1.0/304.8;            // 0.00328083989501312        mm -> feet
  22. const double One30Pt48th        = 1.0/30.48;            // 0.0328083989501312        cm -> feet
  23. const double OnePt3048th        = 1.0/.3048;            // 3.28083989501312            m  -> feet
  24. const double OnePt0003048th        = 1.0/.0003048;            // 3280.83989501312            km -> feet
  25. const double One914Pt4th        = 1.0/914.4;            // 0.00109361329833771        mm -> yards
  26. const double One91Pt44th        = 1.0/91.44;            // 0.0109361329833771        cm -> yards
  27. const double OnePt9144th        = 1.0/.9144;            // 1.09361329833771            m  -> yards
  28. const double OnePt0009144th        = 1.0/.0009144;            // 1093.61329833771            km -> yards
  29. const double One1609344th        = 1.0/1609344;            // 0.000000621371192237334    mm -> Miles
  30. const double One160934Pt4th        = 1.0/160934.4;            // 0.00000621371192237334    cm -> Miles
  31. const double One1609Pt344th        = 1.0/1609.344;            // 0.000621371192237334        m  -> Miles
  32. const double One1Pt609344th        = 1.0/1.609344;            // 0.621371192237334        km -> Miles
  33. const double One4Pt44822th        = 1.0/4.44822161525;    // 0.224808943100241        Nt -> LbForce
  34. const double OnePt737562th        = 1.0/0.7375621493;        // 1.35581794828961            FtLbs -> NtM
  35. const double OnePt44704th        = 1.0/0.44704;            // 2.2369362920544            Mps -> Mph
  36. const double One3Pt785411th        = 1.0/3.78541178401;    // 0.264172052357451        Liters -> Gallons
  37.  
  38. inline double Inches2Feet( const double &i )        { return i*OneTwelfth; }            // 1/12
  39. inline double Inches2Yards( const double &i )        { return i*OneThirtysixth; }        // 1/36
  40. inline double Inches2Miles( const double &i )        { return i*One63360th; }            // 1/63360.0
  41. inline double Inches2MM( const double &i )            { return i*25.4; }
  42. inline double Inches2CM( const double &i )            { return i*2.54; }
  43. inline double Inches2Meters( const double &i )        { return i*.0254; }
  44. inline double Inches2KM( const double &i )            { return i*.0000254; }
  45.  
  46. inline double Feet2Inches( const double &f )        { return f*12.0; }
  47. inline double Feet2Yards( const double &f )            { return f*OneThird; }                // 1/3
  48. inline double Feet2Miles( const double &f )            { return f*One5280th; }                // 1/5280
  49. inline double Feet2MM( const double &f )            { return f*304.8; }
  50. inline double Feet2CM( const double &f )            { return f*30.48; }
  51. inline double Feet2Meters( const double &f )        { return f*0.3048; }
  52. inline double Feet2KM( const double &f )            { return f*0.0003048; }
  53.  
  54. inline double Yards2Inches( const double &y )        { return y*36.0; }
  55. inline double Yards2Feet( const double &y )            { return y*3.0; }
  56. inline double Yards2Miles( const double &y )        { return y*One1760th; }                // 1/1760.0
  57. inline double Yards2MM( const double &y )            { return y*914.4; }
  58. inline double Yards2CM( const double &y )            { return y*91.44; }
  59. inline double Yards2Meters( const double &y )        { return y*.9144; }
  60. inline double Yards2KM( const double &y )            { return y*.0009144; }
  61.  
  62. inline double Miles2Inches( const double &mi )        { return mi*63360.0; }
  63. inline double Miles2Feet( const double &mi )        { return mi*5280; }
  64. inline double Miles2Yards( const double &mi )        { return mi*1760.0; }
  65. inline double Miles2MM( const double &mi )            { return mi*1609344.0; }
  66. inline double Miles2CM( const double &mi )            { return mi*160934.4; }
  67. inline double Miles2Meters( const double &mi )        { return mi*1609.344; }
  68. inline double Miles2KM( const double &mi )            { return mi*1.609344; }
  69.  
  70. inline double MM2CM( const double &mm )                { return mm*.1; }
  71. inline double MM2Meters( const double &mm )            { return mm*.001; }
  72. inline double MM2KM( const double &mm )                { return mm*.000001; }
  73. inline double MM2Inches( const double &mm )            { return mm*One25Pt4th; }            // 0.0393700787401575
  74. inline double MM2Feet( const double &mm )            { return mm*One304Pt8th; }            // 0.00328083989501312
  75. inline double MM2Yards( const double &mm )            { return mm*One914Pt4th; }            // 0.00109361329833771
  76. inline double MM2Miles( const double &mm )            { return mm*One1609344th; }            // 0.000000621371192237334
  77.  
  78. inline double CM2MM( const double &cm )                { return cm*10.0; }
  79. inline double CM2Meters( const double &cm )            { return cm*.01; }
  80. inline double CM2KM( const double &cm )                { return cm*.00001; }
  81. inline double CM2Inches( const double &cm )            { return cm*One2Pt54th; }            // 0.393700787401575
  82. inline double CM2Feet( const double &cm )            { return cm*One30Pt48th; }            // 0.0328083989501312
  83. inline double CM2Yards( const double &cm )            { return cm*One91Pt44th; }            // 0.0109361329833771
  84. inline double CM2Miles( const double &cm )            { return cm*One160934Pt4th; }        // 0.00000621371192237334
  85.  
  86. inline double Meters2MM( const double &m )            { return m*1000.0; }
  87. inline double Meters2CM( const double &m )            { return m*100.0; }
  88. inline double Meters2KM( const double &m )            { return m*.001; }
  89. inline double Meters2Inches( const double &m )        { return m*OnePt0254th; }            // 39.3700787401575
  90. inline double Meters2Feet( const double &m )        { return m*OnePt3048th; }            // 3.28083989501312
  91. inline double Meters2Yards( const double &m )        { return m*OnePt9144th; }            // 1.09361329833771
  92. inline double Meters2Miles( const double &m )        { return m*One1609Pt344th; }        // 0.000621371192237334
  93.  
  94. inline double KM2Meters( const double &km )            { return km*1000.0; }
  95. inline double KM2CM( const double &km )                { return km*100000.0; }
  96. inline double KM2MM( const double &km )                { return km*1000000.0; }
  97. inline double KM2Inches( const double &km )            { return km*OnePt0000254th; }        // 39370.0787401575
  98. inline double KM2Feet( const double &km )            { return km*OnePt0003048th; }        // 3280.83989501312
  99. inline double KM2Yards( const double &km )            { return km*OnePt0009144th; }        // 1093.61329833771
  100. inline double KM2Miles( const double &km )            { return km*One1Pt609344th; }        // 0.621371192237334
  101.  
  102. inline double Kph2Mph( const double &kph )            { return kph*One1Pt609344th; }        // 0.621371192237334
  103. inline double Mph2Kph( const double &mph )            { return mph*1.609344; }
  104.  
  105. inline double Kph2Mps( const double &kph )            { return kph*One3point6th; }        // 1/3.6
  106. inline double Mph2Mps( const double &mph )            { return mph*0.44704; }
  107. inline double Fps2Mps( const double &fps )            { return fps*0.3048; }
  108.  
  109. inline double Mps2Mph( const double &mps )            { return mps*OnePt44704th; }        // 2.2369362920544
  110. inline double Mps2Kph( const double &mps )            { return mps*3.6; }
  111. inline double Mps2Fps( const double &mps )            { return mps*OnePt3048th; }            // 3.28083989501312
  112.  
  113. inline double Lbs2Kg( const double &lbs )            { return lbs*One2Pt20462262185th; }    // 0.453592369999748
  114. inline double Kg2Lbs( const double &kg )            { return kg*2.20462262185; }
  115.  
  116. inline double LbForce2Newtons( const double &lbs )    { return lbs*4.44822161525; }
  117. inline double Newtons2LbForce( const double &nt )    { return nt*One4Pt44822th; }        // 0.224808943100241
  118. inline double FtLbs2NtMeters( const double &ftlbs )    { return ftlbs*OnePt737562th; }        // 1.35581794828961
  119. inline double NtMeters2FtLbs( const double &ntm )    { return ntm*0.7375621493; }
  120.  
  121. inline double Gallons2Liters( const double &l )        { return l*3.78541178401; }
  122. inline double Liters2Gallons( const double &g )        { return g*One3Pt785411th; }        // 0.264172052357451
  123.  
  124. inline double Radians2Degrees( const double &r )    { return r*Rad2Deg; }                // rad*180/Pi
  125. inline double Degrees2Radians( const double &d )    { return d*Deg2Rad; }                // deg*Pi/180
  126. inline double Rad2DegreesIfloat( const float &r )    { return double(r*fRad2Deg); }        // rad*180/Pi
  127. inline double Deg2RadiansIfloat( const float &d )    { return double(d*fDeg2Rad); }        // deg*Pi/180
  128. inline float  floatRadians2Degrees(const double &r)    { return float(r*Rad2Deg); }        // rad*180/Pi
  129. inline float  floatDegrees2Radians(const double &d)    { return float(d*Deg2Rad); }        // deg*Pi/180
  130. inline float  floatRad2Degrees( const float &r )    { return r*fRad2Deg; }                // rad*180/Pi
  131. inline float  floatDeg2Radians( const float &d )    { return d*fDeg2Rad; }                // deg*Pi/180
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