ahengn

> The intensity information is lost in the frame merge in sub mapping. If you want intensity data, you need to modify the following part to retain the original intensity...

> `merge_frames_*` are in [gtsam_points](https://github.com/koide3/gtsam_points/blob/f5eb8d3a7aa555d68801a66762136fc672cd3bca/src/gtsam_points/types/gaussian_voxelmap_cpu_funcs.cpp#L25). I'm thinking of implementing a merge function with intensity support, but it has a low priority for now. Thanks，I found the declaration of merge_frames_* in...