Si Shubin-HEU

Results 3 issues of Si Shubin-HEU

![0616_1](https://user-images.githubusercontent.com/30363654/122151884-ed7ef680-ce92-11eb-8c14-fd40553b3502.jpg) Hello, I want to know how to draw the red b-spline as shown in the above picture? Now I can get the bottom point coordinate traversed by the green...

Hello, thanks for your great work! I would like to test the BALM with 128-scans lidar of robosense, I have modified the params named "N_SCANS" and "scan_line" in balm_velo16.launch, but...

Does the current version of this project support pure LiDAR odometry?