WCudaMSE/Student_OMP_Image/src/cpp/core/01_Rippling/c_math/RipplingMath.h

   1 #ifndef RIPPLING_MATH_H_
   2 #define RIPPLING_MATH_H_
   3
   4 #include "MathTools.h"
   5 #include <cmath>
   6 using namespace std;
   7
   8 /*----------------------------------------------------------------------*\
   9  |*                     Declaration                                     *|
  10  \*---------------------------------------------------------------------*/
  11
  12 /*--------------------------------------*\
  13  |*             Public                  *|
  14  \*-------------------------------------*/
  15
  16 /**
  17  * Dans un header only pour preparer la version cuda
  18  */
  19 class RipplingMath
  20     {
  21
  22         /*--------------------------------------*\
  23         |*              Constructeur            *|
  24          \*-------------------------------------*/
  25
  26     public:
  27         RipplingMath(unsigned int w, unsigned int h)
  28             : dim2 { w / 2.0 }
  29             {
  30             }
  31
  32         virtual ~RipplingMath()
  33             {
  34             //rien
  35             }
  36
  37         /*--------------------------------------*\
  38         |*              Methode                 *|
  39          \*-------------------------------------*/
  40
  41     public:
  42         void colorIJ(uchar4* ptrColor, int i, int j, float t)
  43             {
  44             const double dxy10 = dxy(j, i) / 10.0;
  45             const double grayLevelFloat = 128.0 + 127.0 * cos(dxy10 - t / 7.0) / (dxy10 + 1);
  46             const uchar grayLevel = (uchar)(long(grayLevelFloat) % 256);
  47
  48             ptrColor->x = grayLevel;
  49             ptrColor->y = grayLevel;
  50             ptrColor->z = grayLevel;
  51
  52             ptrColor->w = 255; // Opaque.
  53             }
  54
  55     private:
  56         inline double dxy(int x, int y) // par exmple
  57             {
  58             return sqrt(pow(x - this->dim2, 2.0) + pow(y - this->dim2, 2.0));
  59             }
  60
  61     private:
  62
  63         /*--------------------------------------*\
  64         |*              Attribut                *|
  65          \*-------------------------------------*/
  66
  67     private:
  68         const double dim2; // = dim / 2.
  69     };
  70
  71 #endif
  72
  73 /*----------------------------------------------------------------------*\
  74  |*                     End                                             *|
  75  \*---------------------------------------------------------------------*/