With half of the readers of this site away from work for the holidays, it's a great opportunity to replay one of my favorites, One2Pt20462262185th ...

I believe that we may have had a first yesterday. The coder behind yesterday's post offered a perfectly reasonable explanation: one-time use with a tight deadline. Fair enough. Now I really want to see Isaac's coworker offer some sort of explanation for this ... seriously ...

const double Pi             = 3.14159265358979323846264;
const double TWO_Pi         = Pi*2.0;
const double HALF_Pi        = Pi/2.0;
const double QUARTER_Pi     = Pi/4.0;
const double Deg2Rad        = Pi/180.0;
const double Rad2Deg        = 180.0/Pi;
const float  fDeg2Rad       = static_cast(Deg2Rad);
const float  fRad2Deg       = static_cast(Rad2Deg);
const double OneThird       = 1.0/3.0;
const double One3point6th   = 1.0/3.6;
const double OneTwelfth     = 1.0/12.0;
const double OneThirtysixth = 1.0/36.0;
const double One1760th      = 1.0/1760;
const double One5280th      = 1.0/5280;
const double One63360th     = 1.0/63360.0;
const double One25Pt4th     = 1.0/25.4;       // 0.0393700787401575   mm -> inches
const double One2Pt54th     = 1.0/2.54;       // 0.393700787401575    cm -> inches
const double OnePt0254th    = 1.0/0.0254;     // 39.3700787401575     m  -> inches
const double OnePt0000254th = 1.0/0.0000254;  // 39370.0787401575     km -> inches
const double One2Pt20462262185th = 1.0/2.20462262185;  // 0.453592369999748    Lbs-> Kg
const double One304Pt8th    = 1.0/304.8;      // 0.00328083989501312    mm -> feet
const double One30Pt48th    = 1.0/30.48;      // 0.0328083989501312   cm -> feet
const double OnePt3048th    = 1.0/.3048;      // 3.28083989501312     m  -> feet
const double OnePt0003048th = 1.0/.0003048;   // 3280.83989501312     km -> feet
const double One914Pt4th    = 1.0/914.4;      // 0.00109361329833771    mm -> yards 
const double One91Pt44th    = 1.0/91.44;      // 0.0109361329833771   cm -> yards
const double OnePt9144th    = 1.0/.9144;      // 1.09361329833771     m  -> yards
const double OnePt0009144th = 1.0/.0009144;   // 1093.61329833771     km -> yards
const double One1609344th   = 1.0/1609344;    // 0.000000621371192237334  mm -> Miles
const double One160934Pt4th = 1.0/160934.4;   // 0.00000621371192237334 cm -> Miles
const double One1609Pt344th = 1.0/1609.344;   // 0.000621371192237334   m  -> Miles
const double One1Pt609344th = 1.0/1.609344;   // 0.621371192237334    km -> Miles
const double One4Pt44822th  = 1.0/4.44822161525;  // 0.224808943100241    Nt -> LbForce
const double OnePt737562th  = 1.0/0.7375621493;   // 1.35581794828961     FtLbs -> NtM
const double OnePt44704th   = 1.0/0.44704;    // 2.2369362920544      Mps -> Mph
const double One3Pt785411th = 1.0/3.78541178401;  // 0.264172052357451    Liters -> Gallons
inline double Inches2Feet( const double &i )    { return i*OneTwelfth; }      // 1/12
inline double Inches2Yards( const double &i )   { return i*OneThirtysixth; }  // 1/36
inline double Inches2Miles( const double &i )   { return i*One63360th; }      // 1/63360.0
inline double Inches2MM( const double &i )      { return i*25.4; }
inline double Inches2CM( const double &i )      { return i*2.54; }
inline double Inches2Meters( const double &i )  { return i*.0254; }
inline double Inches2KM( const double &i )      { return i*.0000254; }
//[Ed: Snip]
inline double CM2MM( const double &cm )         { return cm*10.0; }
inline double CM2Meters( const double &cm )     { return cm*.01; }
inline double CM2KM( const double &cm )         { return cm*.00001; }
inline double CM2Inches( const double &cm )     { return cm*One2Pt54th; }     // 0.393700787401575
inline double CM2Feet( const double &cm )       { return cm*One30Pt48th; }    // 0.0328083989501312
inline double CM2Yards( const double &cm )      { return cm*One91Pt44th; }    // 0.0109361329833771
inline double CM2Miles( const double &cm )      { return cm*One160934Pt4th; } // 0.00000621371192237334
inline double Meters2MM( const double &m )      { return m*1000.0; }
inline double Meters2CM( const double &m )      { return m*100.0; }
inline double Meters2KM( const double &m )      { return m*.001; }
inline double Meters2Inches( const double &m )  { return m*OnePt0254th; }     // 39.3700787401575
inline double Meters2Feet( const double &m )    { return m*OnePt3048th; }     // 3.28083989501312
inline double Meters2Yards( const double &m )   { return m*OnePt9144th; }     // 1.09361329833771
inline double Meters2Miles( const double &m )   { return m*One1609Pt344th; }  // 0.000621371192237334
//[Ed: Snip, full file]