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2012-02-14 07:27:15 -0500	asked a question	Default values inside a message or srv definition elements in a srv or msg definition are assigned zero values by the default constructor. What about when I wish to assign a non-zero or other special value as the default initialization value to a msg element. using a construct such as: `int32 x=100` regards x as a constant when the msg headers are generated. Is what I'm looking for possible at all? Thanks much
2011-11-22 02:27:22 -0500	asked a question	PointCloud vs. PointCloud2 for unstructured point clouds Hi, I have an application that publishes an unstructured point cloud, which in turn will be used to update a costmap. I remember reading that PointCloud is going to be retired in future a versions in favor of PointCloud2. However, a cursory look at PointCloud2 seems as though it needs well-defined height & width fields. How can I represent an unstructured point cloud using PointCloud2? Can I simply set height to 1 and width to N, and expect the library to treat it as a simple vector of (x,y,z) co-ordinates? K