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### Author Topic: Golfed code snippets  (Read 856 times)

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#### _iPhoenix_

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##### Re: Golfed code snippets
« on: December 08, 2018, 04:28:09 am »
As far as weird/cool constants in golfed code goes, this is my absolute favorite.

From the Quake III Arena source code, a routine to calculate an inverse square root
Code: [Select]
`float Q_rsqrt( float number ){   long i;   float x2, y;   const float threehalfs = 1.5F;   x2 = number * 0.5F;   y  = number;   i  = * ( long * ) &y;                       // evil floating point bit level hacking   i  = 0x5f3759df - ( i >> 1 );               // what the f***?    y  = * ( float * ) &i;   y  = y * ( threehalfs - ( x2 * y * y ) );   // 1st iteration//   y  = y * ( threehalfs - ( x2 * y * y ) );   // 2nd iteration, this can be removed   return y;}`

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