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This can be done with functionality available in PCL, here's a example of using it that: cloud_to_mesh_node, cloud_to_mesh_ros.h. This node converts a point cloud it receives on the ~/cloud
topic to a mesh and publishes that as a Marker or Shape message.
Using PCL functionality like this might not be the most efficient method though. For real-time use you might want to look into using other tools like voxblox. This builds a TSDF or ESDF representation from sensor data and can efficiently mesh it in real-time.