@xavier_BUHOT I see you've gotten some pointers here. However going forward I'd like to request that you follow [our guidelines](http://wiki.ros.org/Support) and ask questions on http://answers.ros.org . ROS Discourse is for news and general interest discussions. --- [Visit Topic](https://discourse.ros.org/t/normal-of-pointcloud2/3314/5) or reply to this email to respond. If you do not want to receive messages from ros-users please use the unsubscribe link below. If you use the one above, you will stop all of ros-users from receiving updates. ______________________________________________________________________________ ros-users mailing list ros-users@lists.ros.org http://lists.ros.org/mailman/listinfo/ros-users Unsubscribe: