XBeach structure

A few very specific functions in the XBeach Toolbox just return the desired result. If any flexibility of the returned value is needed, the XBeach structure is used. For example, the result of the xb_read_input function, which reads an entire model input, returns such a structure. Several XBeach structures can be nested into each other. The xb_human collection of functions provides low-level interaction functions for the XBeach structure.

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