easy-iso

Iso-surface extraction from volume data
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M2.h (622B)

      1 // File       : M2.h
      2 // Date       : Thu Nov 24 16:14:51 2016
      3 // Author     : Fabian Wermelinger
      4 // Description: M2 interpolation kernel (Monaghan 19885) -- triangular function
      5 // Copyright 2016 ETH Zurich. All Rights Reserved.
      6 #ifndef M2_H_LQ69GRM8
      7 #define M2_H_LQ69GRM8
      8 
      9 #include <cmath>
     10 #include "common.h"
     11 
     12 class M2
     13 {
     14 public:
     15     static constexpr int start = 0;
     16     static constexpr int end   = 2;
     17 
     18     inline Real operator()(const Real x) const
     19     {
     20         const Real IxI = std::abs(x);
     21         if (IxI <= 1.0)
     22             return 1.0 - IxI;
     23         else
     24             return 0.0;
     25     }
     26 };
     27 
     28 #endif /* M2_H_LQ69GRM8 */