Hello (Radu), I'm doing cylinder segmentation and displaying a rviz cylinder marker based on the result. It took me a while to figure out where the definition of the model coefficients were for it (finally looked in the source and found sac_model_cylinder.hpp). Can I suggest that the model coefficients for each type be listed in the comments in model_types.h? That would be a nice place for reference without having to look at the source for each different type. Might also make a good wiki entry. I might work on the latter. Thanks, --Adam Adam Leeper Stanford University aleeper@stanford.edu 719.358.3804