    CImg<T>& fillC(const unsigned int x, const unsigned int y, const unsigned int z, const int a0, ...) {
      const ulongT whd = (ulongT)_width*_height*_depth;
      if (x<_width && y<_height && z<_depth) _cimg_fill1(x,y,z,0,whd,_spectrum,int);
      return *this;
    }
    CImg<T>& fillC(const unsigned int x, const unsigned int y, const unsigned int z, const int a0, ...) {
      const ulongT whd = (ulongT)_width*_height*_depth;
      if (x<_width && y<_height && z<_depth) _cimg_fill1(x,y,z,0,whd,_spectrum,int);
      return *this;
    }