text: #ifndef WVTICS_KERNEL_H
  #define WVTICS_KERNEL_H
  
  float sph_kernel ( const float r, const float h );
  float sph_kernel_derivative ( const float r, const float h );
  double bias_correction ( const float h );
  
  float sph_kernel_M4 ( const float r, const float h );
  float sph_kernel_derivative_M4 ( const float r, const float h );
  
  float sph_kernel_WC2 ( const float r, const float h );
  float sph_kernel_derivative_WC2 ( const float r, const float h );
  double bias_correction_WC2 ( const float h );
  
  float sph_kernel_WC6 ( const float r, const float h );
  float sph_kernel_derivative_WC6 ( const float r, const float h );
  double bias_correction_WC6 ( const float h );
  
  #endif //WVTICS_KERNEL_H
  