[PCL]FPFH描述子

fpfh_est.setSearchSurface(data);

如果没有设置SearchSurface，使用input数据集作为查找的表面

1 // If no search surface has been defined, use the input dataset as the search surface itself
2   if (!surface_)
3   {
4     fake_surface_ = true;
5     surface_ = input_;
6   }