double vortex_xml_rpc_struct_get_member_value_as_double ( XmlRpcStruct _struct,
const char *  member_name 
)

Return the double value inside the provided struct at the selected member.

See also:

Parameters:
_struct The struct where the operation will be performed.
member_name The member name to look up for the double value inside.
Returns:
Returns the double inside the struct or 0.0 if it fails.