build more layers basic on inpaint and smooth

[xaioqi]

thanks for your open source code!! it provide to build elevation map used by quad robot, our quad robot use more layers to control i have looked at your example layer and try to build own layer, include "z_inpainted", "z_smooth", "normal_vectors_x", "normal_vectors_y", "normal_vectors_z", "smooth_normal_vectors_x", "smooth_normal_vectors_y", "smooth_normal_vectors_z", "traversability", "slope", "roughness" but own code make lots of error to run that elevation map unsuccessfully, please offer us more information about make layers thank you in advance

[mktk1117]

Could you provide more information? Like what kind of error etc.