diguy_module_net.h

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/****************************************************************************
 * Copyright (c) 2019 VT MAK
 * All rights reserved.
 ****************************************************************************/


#pragma once

/*********************************************************************
 **
 *t  DI-Guy API, VR-Link
 **
 *b  Link against: libdiguy_module_dis or libdiguy_module_hla
 **
 */

#include <declspec_diguy.h>

class diguyCharacter;
class diguyScenario;
class diguyNetInterface;
struct diguyNetInterfaceData;
class bdiDataTracker;


/****************************************************************************/
typedef enum
{
        DIGUY_COORDINATE_SYSTEM_NONE       = 0,
        DIGUY_COORDINATE_SYSTEM_UTM        = 1,
        DIGUY_COORDINATE_SYSTEM_FLAT_EARTH = 2,
        DIGUY_COORDINATE_SYSTEM_GEOCENTRIC = 3

} diguyCoordinateSystemType;


extern "C"
{

/*l
 *b  Description:
 **
 **    This function allows VR-Link to install some callbacks so that DSS file
 **    load and save will include VR-Link-specific info.
 **
 **    It should be called BEFORE the scenario object is constructed.
 **
 *b  Returns:
 **
 **    0 on success, -1 on failure
 **
 *b  Example:
 **
 *e    diguy_module_net_initialize();
 */
BDI_DECLSPEC_diguy int diguy_module_net_initialize();

/*l
 *b  Description:
 **
 **    This function allows DI-Guy networking to clean up.
 **
 **    It should be called once, on application shutdown, after the scenario
 **    object has been destroyed.
 **
 *b  Returns:
 **
 **    0 on success, -1 on failure
 **
 *b  Example:
 **
 *e    diguy_module_net_deinitialize();
 */
BDI_DECLSPEC_diguy int diguy_module_net_deinitialize();

/*l
 *b  Description:
 **
 **    This function returns a diguyNetInterface which can be used to change
 **    settings on the networking module.  This will be an appropriate
 **    version of the net interface, i.e. a DIS or a HLA interface, depending
 **    on which library was linked in.
 **
 *b  Returns:
 **
 **    pointer to a diguyNetInterface
 */
BDI_DECLSPEC_diguy diguyNetInterface* get_net_interface();

}


/****************************************************************************/
/*l
 *b  Description:
 **
 **    This class provides accessors to the interface parameters, as well as
 **    functions for going online and offline.
 **
 */
class BDI_DECLSPEC_diguy diguyNetInterface
{

public:

        /*l
         *b  Description:
         **
         **    This function tells DI-Guy that it should start talking over
         **    VR-Link.
         **
         **    It should be called when DI-Guy should join an exercise.
         **
         *b  Arguments:
         **
         *a    scenario - pointer to the diguyScenario which will be connected to
         *a               the network
         *a    exconn   - optional pointer to a VR-Link exercise connection to use
         **
         *b  Returns:
         **
         **    0 on success, -1 on failure
         */
        virtual int go_online(diguyScenario* scenario, void* exconn = NULL) = 0;

        /*l
         *b  Description:
         **
         **    This function tells DI-Guy that it should stop talking over
         **    VR-Link.
         **
         *b  Returns:
         **
         **    0 on success, -1 on failure
         */
        virtual int go_offline() = 0;

        /*l
         *b  Description:
         **
         **    This function asks if DI-Guy is connected to the network.
         **
         *b  Returns:
         **
         **    1 if yes, 0 if no
         */
        virtual int get_online() = 0;

        /*l
         *b  Description:
         **
         **    This function sets the filename of the VR-Link configuration file
         **    that will be read by the DI-Guy software.  The default is
         **    "network.cfg".  This function must be called before the network
         **    module is initialized.
         **
         *i  C++ only
         **
         *b  Arguments:
         **
         *a    cfg_file - filename of desired configuration file
         **
         *b  Returns:
         **
         **    0 on success, -1 on failure
         */
        virtual int set_cfg_file(const char* cfg_filename) = 0;

        /*l
         *b  Description:
         **
         **    This function tells DI-Guy that it should read PDUs from the
         **    network and process them.  Call this function periodically.
         **
         *b  Returns:
         **
         **    0 on success, -1 on failure
         */
        virtual int update() = 0;

        /*l
         *b  Description:
         **
         **    Sets the exercise id to be used by DI-Guy networking.
         **
         **    The function will fail if DI-Guy is on-line (is participating in
         **    an exercise).
         **
         *b  Arguments:
         **
         *a    exercise - the exercise id to use. Must be <= 255 in DIS
         **
         *b  Returns:
         **
         **    0 on success, -1 on failure
         */
        virtual int set_exercise(int exercise) = 0;

        /*l
         *b  Description:
         **
         **    Gets the exercise id being used by DI-Guy networking.
         **
         *b  Returns:
         **
         **    the exercise id
         */
        virtual int get_exercise() = 0;

        /*l
         *b  Description:
         **
         **    Sets the host id to be used by DI-Guy networking.
         **
         **    The function will fail if DI-Guy is on-line (is participating in
         **    an exercise).
         **
         *b  Arguments:
         **
         *a    host - the host id to use; the host id identifies the local
         *a           machine
         **
         *b  Returns:
         **
         **    0 on success, -1 on failure
         */
         virtual int set_host(int host) = 0;

        /*l
         *b  Description:
         **
         **    Gets the host id being used by DI-Guy networking.
         **
         *b  Returns:
         **
         **    the host id
         */
        virtual int get_host() = 0;

        /*l
         *b  Description:
         **
         **    Sets the site id to be used by DI-Guy networking.
         **
         **    The function will fail if DI-Guy is on-line (is participating in
         **    an exercise).
         **
         *b  Arguments:
         **
         *a    site - the site id to use; the site id identifies where the local
         *a           machine is located
         **
         *b  Returns:
         **
         **    0 on success, -1 on failure
         */
        virtual int set_site(int site) = 0;

        /*l
         *b  Description:
         **
         **    Gets the site id being used by DI-Guy networking.
         **
         *b  Returns:
         **
         **    the site id
         */
        virtual int get_site() = 0;

        /*l
         *b  Description:
         **
         **    Sets the network port number to be used by DI-Guy networking.
         **
         **    The function will fail if DI-Guy is on-line (is participating in
         **    an exercise).
         **
         *b  Arguments:
         **
         *a    port - the port number to use
         **
         *b  Returns:
         **
         **    0 on success, -1 on failure
         */
        virtual int set_port(int port) = 0;

        /*l
         *b  Description:
         **
         **    Gets the port number of the port being used for DI-Guy networking.
         **
         *b  Returns:
         **
         **    the port address
         */
        virtual int get_port() = 0;

        /*l
         *b  Description:
         **
         **    Sets the IP address to be used by DI-Guy networking.  This address
         **    is the address to which messages are sent.  Normally, it is a
         **    broadcast or multicast address.
         **
         **    The function will fail if DI-Guy is on-line (is participating in
         **    an exercise).
         **
         *b  Arguments:
         **
         *a    ipaddr - the IP address
         **
         **    ipaddr is a string containing 4 integers separated by periods, or
         **    the null string, which means "let DI-Guy choose the address".  An
         **    address of "0" or "0.0.0.0" means broadcast.
         **
         *b  Returns:
         **
         **    0 on success, -1 on failure
         */
        virtual int set_ipaddr(const char* ipaddr) = 0;

        /*l
         *b  Description:
         **
         **    Gets the IP address currently being used by DI-Guy networking.
         **    This address is the address to which messages are sent.  Normally
         **    this is a broadcast or multicast address.
         **
         *b  Arguments:
         **
         *a    ipaddr - IP address, returned; see below
         **
         *b  Returns:
         **
         **    0 on success, -1 on failure
         **
         **    ipaddr is a char**, into which a char* will be placed.  This char*
         **    points to static data owned by DI-Guy.  Do not store this pointer,
         **    and do not modify what it points to.  Copy the strings you need
         **    out of the static buffer.  (Assignment of a char* to a Microsoft
         **    CString will work very nicely, for example.)
         **
         **    ipaddr is a string containing 4 integers separated by periods.
         */
        virtual int get_ipaddr(char** ipaddr) = 0;

        /*l
         *b  Description:
         **
         **    Sets the HLA Federation name you wish to create or join.
         **
         *b  Arguments:
         **
         *a    federation_name - as string
         **
         *b  Returns:
         **
         **    0 on success, -1 on failure
         */
        virtual int set_federation_name(const char* federation_name);

        /*l
         *b  Description:
         **
         **    Gets the HLA Federation name.
         **
         *b  Returns:
         **
         **    String containing HLA federation name
         */
        virtual const char* get_federation_name();

        /*l
         *b  Description:
         **
         **    Sets the HLA Federate name to use. Federate names should be
         **    unique for each connection instance.
         **
         *b  Arguments:
         **
         *a    federate_name - as string
         **
         *b  Returns:
         **
         **    0 on success, -1 on failure
         */
        virtual int set_federate_name(const char* federate_name);

        /*l
         *b  Description:
         **
         **    Gets the HLA Federate name.
         **
         *b  Returns:
         **
         **    String containing HLA federate name
         */
        virtual const char* get_federate_name();

        /*l
         *b  Description:
         **
         **    Sets the HLA Federate type to identify as.
         **
         *b  Arguments:
         **
         *a    federate_type - as string
         **
         *b  Returns:
         **
         **    0 on success, -1 on failure
         */
        virtual int set_federate_type(const char* federate_type);

        /*l
         *b  Description:
         **
         **    Gets the HLA Federate name.
         **
         *b  Returns:
         **
         **    String containing HLA federate type
         */
        virtual const char* get_federate_type();

        /*l
         *b  Description:
         **
         **    Sets whether DI-Guy networking will display remote characters.
         **
         **    The function will fail if DI-Guy is on-line (is participating in
         **    an exercise).
         **
         *b  Arguments:
         **
         *a    display - pass 1 if DI-Guy networking should display remote
         *a              characters, 0 if not
         **
         *b  Returns:
         **
         **    0 on success, -1 on failure
         */
        virtual int set_display_remote_chars(int display) = 0;

        /*l
         *b  Description:
         **
         **    Returns whether DI-Guy networking will display remote characters
         **    when online.
         **
         *b  Returns:
         **
         **    1 if enabled, 0 if not
         */
        virtual int get_display_remote_chars() = 0;

        /*l
         *b  Description:
         **
         **    This function sets whether DI-Guy is sending custom pdus.
         **
         *b  Arguments:
         **
         **    0 if custom pdus should not be sent,
         **    1 if custom pdus should be sent
         */
        virtual void set_send_custom_pdus(int) = 0;

        /*l
         *b  Description:
         **
         **    This function returns whether DI-Guy is sending custom pdus.
         **
         *b  Returns:
         **
         **    0 if custom pdus are not being sent,
         **    1 if custom pdus are being sent
         */
        virtual int get_send_custom_pdus() = 0;

        /*l
         *b  Description:
         **
         **    This function returns whether DI-Guy sends custom pdus that concatenate
         **    hand item with the body appearance name. DI-Guy 13.0 and up separate these.
         */
        virtual int get_send_diguy_125_appearance_packets() = 0;
        /*l
         *b  Description:
         **
         **    This function set whether whether DI-Guy sends custom pdus that concatenate
         **    hand item with the body appearance name. DI-Guy 13.0 and up separate these.
         */
        virtual void set_send_diguy_125_appearance_packets(int) = 0;


        /*l
         *b  Description:
         **
         **    Turns the 'never create character' bit on.
         */
        virtual void enter_vpnet_mode() = 0;

        /*l
         *b  Description:
         **
         **    returns the diguyCharacter associated with the entity id specified.
         **
         *b  Arguments:
         **
         *a    id - Under HLA, two formats are permitted: the H L A object name,
         *a         or the DIS entity identifier ("site:application:entity", where
         *a         each is an integer)
         **
         **    Under DIS, only the DIS Entity Identifier is permitted.
         */
        virtual diguyCharacter* get_character_from_id(char const* id) = 0;

        /*l
         *b  Description:
         **
         **    Returns the name corresponding to the entity.  The caller must
         **    delete the returned string.
         **
         *b  Arguments:
         **
         *a    reflected_entity - entity to be named
         **
         *b  Returns:
         **
         **    name of reflected entity
         */
        virtual char* get_name_from_entity(void* reflected_entity) = 0;

        /*l
         *b  Description:
         **
         **    Sets whether DI-Guy networking will publish local characters to the
         **    network.
         **
         **    This function WILL succeed even if DI-Guy is on-line (is
         **    participating in an exercise).
         **
         *b  Arguments:
         **
         *a    publish - pass 1 if DI-Guy networking should publish local characters
         *a              to the network, 0 if not
         **
         *b  Returns:
         **
         **    0 on success, -1 on failure
         */
        virtual int set_publish_local_chars(int publish) = 0;

        /*l
         *b  Description:
         **
         **    Returns whether DI-Guy networking will publish local characters
         **    when online.
         **
         *b  Returns:
         **
         **    1 if enabled, 0 if not
         */
         virtual int get_publish_local_chars() = 0;

        /*l
         *b  Description:
         **
         **    This function sets the position offset which is currently added to
         **    each character when it is published, and subtracted from each
         **    character when it is reflected.  This is useful to compensate for
         **    inter-application location error.
         **
         *b  Arguments:
         **
         *a    z     - z offset in meters
         *a    yaw   - orientation offset in degrees
         *a    roll  - orientation offset in degrees
         *a    pitch - orientation offset in degrees
         **
         *b  Returns:
         **
         **    0 on success, -1 on failure
         */
        virtual int set_position_offset(float z, float yaw, float roll, float pitch) = 0;

        /*l
         *b  Description:
         **
         **    This function gets the position offset which is currently added to
         **    each character when it is published, and subtracted from each
         **    character when it is reflected.  The offset is useful to
         **    compensate for inter-application database location and orientation
         **    error.
         **
         *b  Arguments:
         **
         *a    z     -  z offset in meters
         *a    yaw   -  orientation offset in degrees
         *a    roll  -  orientation offset in degrees
         *a    pitch -  orientation offset in degrees
         **
         *b  Returns:
         **
         **    0 on success, -1 on failure
         */
        virtual int get_position_offset(float* z,
                float* yaw,
                float* roll,
                float* pitch) = 0;

        /*l
         *b  Description:
         **
         **    This function allows iteration through the list of names remote
         **    VR-Link hosts that DI-Guy knows about.
         **
         *b  Arguments:
         **
         *a    buf     - destination buffer for host name (64 bytes is plenty)
         *a    handle  - return value from last call to the function; pass NULL
         *a              to get the first host name; pass previous return value
         *a              to get the next host name
         **
         *b  Returns:
         **
         **    void* to be passed as handle argument on the next call; NULL when
         **    end of list is reached
         */
        virtual void* get_next_participant_name(char* buf, void* handle) = 0;

        /*l
         *b  Description:
         **
         **    Fetches what character type and what appearance should be used for
         **    a given DIS entity type septet.
         **
         *b  Arguments:
         **
         *a    chartype     - address of char*, for returning a string which
         *a                   names the DI-Guy character type
         *a    appearance   - address of char*, for returning a string which
         *a                   names the DI-Guy character appearance
         *a    septet       - array of seven integers specifying the kind,
         *a                   domain, country, category, subCategory, specific,
         *a                   and extra of the entity in question
         **
         *b  Returns:
         **
         **    0 on success, -1 on failure
         */
         virtual int get_model_from_septet(const char** chartype,
                const char** appearance,
                const char** hand_item,
                const int septet[7]) = 0;

        /*l
         *b  Description:
         **
         **    Fetches what DIS entity type septet should be used for a given
         **    character type and appearance.
         **
         *b  Arguments:
         **
         *a    chartype     - a string which names the DI-Guy character type
         *a    appearance   - a string which names the DI-Guy character appearance
         *a    septet       - array of seven integers, returned, indicating the kind,
         *a                   domain, country, category, subCategory, specific, and
         *a                   extra of the entity in question
         **
         *b  Returns:
         **
         **    0 on success, -1 on failure
         */
        virtual int get_septet_from_model(int septet[7],
                const char* chartype,
                const char* appearance,
                const char* hand_item) = 0;

        /*l
         *b  Description:
         **
         **    This functions sets the amount of time that can elapse since the
         **    last update before an entity is timed out.  The default is 12
         **    seconds.
         **
         *b  Arguments:
         **
         *a    interval - number of seconds until timeout
         */
        virtual void set_timeout_interval(float interval) = 0;

        /*l
         *b  Returns:
         **
         **    timeout value in seconds; see set_timeout_interval()
         */
        virtual float get_timeout_interval() = 0;

        /*l
         *b  Description:
         **
         **    This function sets the number of hops a packet can take before
         **    being killed.  Setting this value to -1 means that the system
         **    default will be used.
         **
         **    This value must be set before the connection goes online.
         **
         *b  Arguments:
         **
         *a    time_to_live - number of hops until packed is killed
         */
        virtual void set_time_to_live(int time_to_live) = 0;

        /*l
         *b  Returns:
         **
         **    number of hops until packed is killed; see set_time_to_live()
         */
        virtual int get_time_to_live() = 0;


/*****************************************************************************/
/****************************************************************************/

        /*l
         *b  Description:
         **
         **    Sets the latitude and longitude to be used by DI-Guy networking.
         **    The latitude and longitude are taken as the location, on Earth, of
         **    the origin of the database.
         **
         **    The function will fail if DI-Guy is on-line (is participating in
         **    an exercise).
         **
         *b  Arguments:
         **
         *a    lat - the latitude in radians, positive north
         *a    lon - the longitude in radians, positive east
         **
         *b  Returns:
         **
         **    0 on success, -1 on failure
         */
        virtual int set_lat_lon(double lat, double lon) = 0;

        /*l
         *b  Description:
         **
         **    Gets the latitude and longitude currently being used by DI-Guy
         **    networking for the placement of the database origin.
         **
         *b  Arguments:
         **
         *a    lat - latitude of origin, returned; see below
         *a    lon - longitude of origin, returned; see below
         **
         *b  Returns:
         **
         **    0 on success, -1 on failure
         **
         **    lat and lon are char**'s, into which char*'s will be placed.
         **    These char*'s point to static data owned by DI-Guy.  Do not
         **    store these pointers, and do not modify what they point to.  Copy
         **    the strings needed out of the static buffers.  (Assignment of a
         **    char* to a Microsoft CString will work very nicely, for example.)
         **
         **    lat and lon are expressed as strings of the form:
         **
         *-       - [-]d [N|W|S|E]     or
         *-       - [-]d m [N|W|S|E]   or
         *-       - [-]d m s [N|W|S|E]
         **
         **    N and E are taken as positive.  S and W will negate the value
         **    otherwise computed.  d, m, and s are positive, floating point
         **    values, taken as degrees, minutes, and seconds, respectively.
         **    A leading minus sign will negate the entire value otherwise
         **    computed (so, e.g., a '-' and a 'S' will result in a double-
         **    negation).
         */
        virtual int get_lat_lon(double* lat, double* lon) = 0;

        /*l
         *b  Description:
         **
         **    returns a string of the form
         **
         *-       - d [N|W|S|E]     or
         *-       - d m s [N|W|S|E]
         **
         **    N and E are used for positive angles.  S and W are used for
         **    negative angles.  In the d m s format, d and m are integers
         **    (degrees and minutes) and s (seconds) is a floating point value.
         **    In the d format, d (degrees) is a floating point value.
         **
         *b  Arguments:
         **
         *a    outbuf - a buffer into which to copy the resulting string
         *a    value  - the lat or lon value to be converted into a string
         *a    is_lat - boolean indicating latitude (North/South) rather than
         *a             longitude(East/West)
         *a    is_decimal - boolean indicating that decimal degrees are
         *a                 desired, rather than degrees, minutes, and seconds
         *a    value_is_degrees - boolean indicating whether the input value is
         *a                       in degrees (as opposed to radians)
         */
        virtual void format_lat_or_lon(char* outbuf,
                double value,
                bool is_lat,
                bool is_decimal,
                bool value_is_degrees) = 0;

        /*l
         *b  Description:
         **
         **    Sets the UTM zone of the location currently being used by DI-Guy
         **    networking for the placement of the database origin.  The easting
         **    and northing are assumed not to change.
         **
         *b  Arguments:
         **
         *a    zone - the utm zone
         *a    southzone - pass 1 if the origin is in the southern hemisphere
         **
         *b  Returns:
         **
         **    0 on success, -1 on failure
         */
        virtual int set_utm_zone(int zone, int southzone) = 0;

        /*l
         *b  Description:
         **
         **    Sets, in UTM coordinates, the location currently being used by
         **    DI-Guy networking for the placement of the database origin.
         **
         *b  Arguments:
         **
         *a    zone      - the utm zone
         *a    southzone - pass 1 if the origin is in the southern hemisphere
         *a    easting   - the normalized (positive only) easting of the database
         *a                origin within the zone
         *a    northing  - the normalized (positive only) northing of the
         *a                database origin within the zone
         **
         *b  Returns:
         **
         **    0 on success, -1 on failure
         */
        virtual int set_utm(int zone,
                int southzone,
                double easting,
                double northing) = 0;

        /*l
         *b  Description:
         **
         **    Gets, in UTM coordinates, the location currently being used by
         **    DI-Guy networking for the placement of the database origin.
         **
         *b  Arguments:
         **
         *a    zone      - the utm zone, returned
         *a    southzone - 1 if the origin is in the southern hemisphere,
         *a                returned
         *a    easting   - the normalized (positive only) easting of the database
         *a                origin within the zone, returned
         *a    northing  - the normalized (positive only) northing of the
         *a                database origin within the zone, returned
         **
         *b  Returns:
         **
         **    0 on success, -1 on failure
         */
        virtual int get_utm(int* zone,
                int* southzone,
                double* easting,
                double* northing) = 0;

        /*l
         *b  Description:
         **
         **    This function sets whether user-defined latitude/longitude
         **    coordinates should be used for the origin of the database, or the
         **    coordinates that come from graphics files for scenario scene
         **    objects.
         **
         *b  Arguments:
         **
         *a    use_user_defined - pass 1 if user-defined coordinates should be
         *a                       used, 0 if coordinates from graphics file
         *a                       should be used
         **
         *b  Returns:
         **
         **    0 on success, -1 on failure
         */
        virtual int set_use_user_defined_coords(int use_user_defined) = 0;

        /*l
         *b  Returns:
         **
         **    0 if graphics file coordinates are used,
         **    1 if user-defined coordinates are used
         */
        virtual int get_use_user_defined_coords() = 0;

        /*l
         *b  Description:
         **
         **    Converts a 3d database-origin-relative location into a string
         **    describing it in earth coordinates.  This string could be in a
         **    number of different formats including decimal lat/lon, dms
         **    lat/lon, and UTM.
         **
         *b  Arguments:
         **
         *a    outbuf  - buffer into which to put the output string
         *a    x, y, z - 3 floats specifying location
         **
         *b  Returns:
         **
         **    0 on success, -1 on failure.  Fails if DI-Guy Scenario is not currently
         **    on the network, meaning that a database-to-earth coordinate conversion
         **    cannot be performed.
         */
        virtual int get_earth_coord(char* outbuf,
                const float x,
                const float y,
                const float z) = 0;

        /*l
         *b  Description:
         **
         **    Changes the format of the output of get_earth_coord.  Toggles
         **    between UTM, dms lat/lon, decimal lat/lon, and "punting", meaning
         **    that the caller of get_earth_coord() should fend for itself.  This
         **    generally means that the caller will use database-origin-relative
         **    coordinates.
         */
        virtual void toggle_earth_coord_format() = 0;

        /*l
         *b  Description:
         **
         **    Sets whether networking should use database coordinates or not.
         **    If database coordinates are used, the database origin is placed at
         **    the center of the earth.  This makes coordinate conversion to and
         **    from UTM unnecessary.  Using database coordinates renders
         **    ineffective any UTM-related settings which would position the
         **    database.
         **
         *b  Arguments:
         **
         *a    use_database_coords - 1 if database coordinates should be used,
         *a                          0 otherwise
         **
         *b  Returns:
         **
         **    0 if successful, -1 on failure.
         */
        virtual int set_use_database_coords(int use_dbc) = 0;

        /*l
         *b  Description:
         **
         **    This function returns the number of potential coordinate converters
         **    that the networking module supports.
         **
         *b  Returns:
         **
         **    number of converters
         */
        virtual int get_num_coordinate_systems();

        /*l
         *b  Description:
         **
         **    This function returns the name of the coordinate system at the
         **    specified index.  This is a string representation of a
         **    diguyCoordinateSystemType enumeration.
         **
         *b  Returns:
         **
         **    name of converter
         */
        virtual const char* get_coordinate_system_name(int index);

        /*l
         *b  Description:
         **
         **    Sets the coordinate system based on the name given. Currently
         **    supports: "No Conversion", "UTM", "Flat Earth", "Geocentric".
         **
         *b  Returns:
         **
         **    0 on success, -1 on failure.
         */
        virtual int set_coordinate_system_type(const char* name);

        /*l
         *b  Description:
         **
         **    returns the coordinate system name. Current possible values are
         **    "No Conversion", "UTM", "Flat Earth", "Geocentric".
         **
         *b  Returns:
         **
         **    name of coordinate system type
         */
        virtual const char* get_coordinate_system_type_name();

        /*l
         *b  Description:
         **
         **    Sets the coordinate system based on the system type.
         **
         *b  Returns:
         **
         **    0 on success, -1 on failure.
         */
        virtual int set_coordinate_system_type(diguyCoordinateSystemType system_type);

        /*l
         **
         *b  Description:
         **
         **    Gets the current coordinate system in use.
         **
         *b  Returns:
         **
         **    diguyCoordinateSystemType enumeration
         */
        virtual diguyCoordinateSystemType get_coordinate_system_type();

        /*l
         *b  Description:
         **
         **    Documentation Pending
         */
        virtual void set_use_UTM_standard_offsets(int standard_offsets);

        /*l
         *b  Description:
         **
         **    Documentation Pending
         */
        virtual int get_use_UTM_standard_offsets();

        /*l
         *b  Description:
         **
         **    Parses a string of the form
         **
         *-       - [-]d [N|W|S|E]     or
         *-       - [-]d m [N|W|S|E]   or
         *-       - [-]d m s [N|W|S|E]
         **
         **    N and E are taken as positive.  S and W will negate the value
         **    otherwise computed.  d m and s are positive, floating point
         **    values, taken as degrees, minutes, and seconds, respectively.  A
         **    leading minus sign will negate the entire value otherwise computed
         **    (so, e.g., a '-' and a 'S' will result in a double-negation).
         **
         *b  Arguments:
         **
         *a    dms_string - a string of the format described above
         **
         *b  Returns:
         **
         **    a double precision floating point value in radians.
         */
        virtual double parse_dms_to_radians(const char* dms_string) = 0;

        /*l
         *b  Description:
         **
         **    Documentation Pending
         */
        virtual int convert_mgrs_to_local(const char* MGRS_str,
                float* x,
                float* y,
                float* z) = 0;

        /*l
         *b  Description:
         **
         **    Documentation Pending
         */
        virtual const char* convert_local_to_mgrs(float x, float y, float z) = 0;

        /*l
         *b  Description:
         **
         **    Documentation Pending
         */
        // returns straightforward latitude and longitude coordinates
        virtual float convert_local_to_lat(float x, float y, float z) = 0;

        /*l
         *b  Description:
         **
         **    Documentation Pending
         */
        // returns straightforward latitude and longitude coordinates
        virtual double convert_local_to_lat_double(double x, double y, double z) = 0;

        /*l
         *b  Description:
         **
         **    Documentation Pending
         */
        virtual float convert_local_to_long(float x, float y, float z) = 0;

        /*l
         *b  Description:
         **
         **    Documentation Pending
         */
        virtual double convert_local_to_long_double(double x, double y, double z) = 0;

        /*l
         *b  Description:
         **
         **    Documentation Pending
         */
        // returns latitude and longitude in degrees, minutes, seconds
        virtual const char* convert_local_to_lat_long_string(float x, float y, float z) = 0;

        /*l
         *b  Description:
         **
         **    Documentation Pending
         */
        virtual int convert_lat_long_to_local(float lat, float lon, float* x, float* y, float* z) = 0;

        /*l
         *b  Description:
         **
         **    Documentation Pending
         */
        virtual int convert_lat_long_to_local_double(double lat, double lon, float* x, float* y, float* z) = 0;

/*****************************************************************************/
        /*l
         *b  Description:
         **
         **    Sets whether land-based network entities will be ground clamped,
         **    changing their altitude to better correlate with the local
         **    terrain.
         **
         *b  Arguments:
         **
         *a    enabled - pass 1 to enable automatic ground clamping; 0 to disable
         **
         *b  Returns:
         **
         **    0 on success, -1 on failure
         */
        virtual int set_ground_clamp_reflected_land_entities_enabled(int enabled);

        /*l
         *b  Returns:
         **
         **    1 if land-based network entities will be ground clamped, 0 if not
         */
        virtual int get_ground_clamp_reflected_land_entities_enabled();

        /*l
         *b  Description:
         **
         **    Similar to set_ground_clamp_reflected_land_entities_enabled(), but
         **    will clamp only entities from the specified host.  If there is one
         **    host on the network that has particular trouble sending correlated
         **    altitudes this function can be used to clamp its entities without
         **    clamping all entities from all hosts.
         **
         **    This has been useful in some simulation exercises where
         **    participants from multiple vendors are in use.  Entities from
         **    JCATS in particular have required this.
         **
         *b  Arguments:
         **
         *a    from_host - host whose land entities will be clamped
         **
         *b  Returns:
         **
         **    0 on success, -1 on failure
         */
        virtual int set_ground_clamp_reflected_land_entities_from_host(int from_host);

        /*l
         *b  Returns:
         **
         **    host whose land entities will be clamped; see
         **    set_ground_clamp_reflected_land_entities_from_host()
         */
        virtual int get_ground_clamp_reflected_land_entities_from_host();

        /*l
         *b  Description:
         **
         **    Sets the maximum upward change in altitude that ground clamping
         **    will have.
         **
         *b  Arguments:
         **
         *a    max_climb - maximum upward change in altitude, in meters
         **
         *b  Returns:
         **
         **    0 on success, -1 on failure
         */
        virtual int set_ground_clamp_max_climb(float max_climb);

        /*l
         *b  Returns:
         **
         **    maximum upward change in altitude from ground clamping, in meters
         */
        virtual float get_ground_clamp_max_climb();

        /*l
         *b  Description:
         **
         **    Similar to set_ground_clamp_max_climb(), but for downward change.
         */
        virtual int set_ground_clamp_max_drop(float max_drop);

        /*l
         *b  Returns:
         **
         **    maximum downward change in altitude from ground clamping, in
         **    meters
         */
        virtual float get_ground_clamp_max_drop();

        virtual void set_translation_threshold(float value);
        virtual float get_translation_threshold();

        virtual void set_z_velocity_threshold(float value);
        virtual float get_z_velocity_threshold();

        virtual void set_rotation_threshold(float value);
        virtual float get_rotation_threshold();

/****************************************************************************/
        /*l
         *b  Description:
         **
         **    Sets whether network datetime data will be broadcast, received, or
         **    ignored.  See documentation for diguyDatetimeNetworkMode for more
         **    information.
         **
         *b  Arguments:
         **
         *a    network_datetime_mode - how to handle network datetime data
         */
        virtual void set_network_datetime_mode(diguyDatetimeNetworkMode network_datetime_mode);

        /*l
         *b  Returns:
         **
         **    how handle network datetime data will be handled; see
         **    set_network_datetime_mode().
         */
        virtual diguyDatetimeNetworkMode get_network_datetime_mode();

        /*l
         *b  Description:
         **
         **    Sets how often datetime data will be broadcast if this host is
         **    in mode DIGUY_DATETIME_NETWORK_MODE_BROADCAST.
         **
         **    Default is broadcast every 5 seconds.
         **
         *b  Arguments:
         **
         *a    broadcast_interval - how often to broadcast datetime data, in
         *a                         seconds
         */
        virtual void set_network_datetime_broadcast_interval(float broadcast_interval);

        /*l
         *b  Returns:
         **
         **    how often datetime data will broadcast, in seconds
         */
        virtual float get_network_datetime_broadcast_interval();


/****************************************************************************/
/****************************************************************************/

        /*l
         *b  Description:
         **
         **    Sets whether sync mode will be enabled when online.
         **
         **    The function will fail if DI-Guy is already online, participating
         **    in an exercise.
         **
         *b  Arguments:
         **
         *a    enabled - pass 1 if sync mode should be enabled when online,
         *a              0 if not
         **
         *b  Returns:
         **
         **    0 on success, -1 on failure
         */
        virtual int set_sync_mode_enabled(int enabled) = 0;

        /*l
         *b  Description:
         **
         **    Gets whether sync mode is enabled when online.
         **
         *b  Returns:
         **
         **    1 if sync mode is enabled when online, 0 if not
         */
        virtual int get_sync_mode_enabled() = 0;

        /*l
         *b  Description:
         **
         **    Sets whether this machine will serve as sync master when online
         **    and in sync mode.
         **
         *b  Arguments:
         **
         *a    master - pass 1 if this machine will serve as sync master when
         *a             online and in sync mode, 0 if not
         **
         *b  Returns:
         **
         **    0 on success, -1 on failure
         */
        virtual int set_sync_mode_master(int master) = 0;

        /*l
         *b  Description:
         **
         **    Gets whether this machine will serve as sync master when online
         **    and in sync mode.
         **
         *b  Returns:
         **
         **    1 if this machine will serve as sync master when online
         **    and in sync mode, 0 if not
         */
        virtual int get_sync_mode_master() = 0;

        /*l
         *b  Description:
         **
         **    Sets whether this machine's camera will be slaved to a remote
         **    master when online and in sync mode and not sync master.
         **
         **    The function will fail if DI-Guy is already online, participating
         **    in an exercise.
         **
         *b  Arguments:
         **
         **    sl_cam - pass 1 if this machine's camera will be slaved to a
         **             remote master when online and in sync mode and not sync
         **             master, 0 if not
         **
         *b  Returns:
         **
         **    0 on success, -1 on failure
         */
        virtual int set_sync_mode_slave_cam(int sl_cam) = 0;

        /*l
         *b  Description:
         **
         **    Gets whether this machine's camera will be slaved to a remote
         **    master when online, in sync mode, and not sync master.
         **
         *b  Returns:
         **
         **    1 if this machine's camera will be slaved, 0 if not
         */
        virtual int get_sync_mode_slave_cam() = 0;

        /*l
         *b  Description:
         **
         **    This function sets the camera orientation offset to be used in
         **    sync_mode (when VR-Link is online).
         **
         *b  Arguments:
         **
         *a    offset_r - orientation offset
         *a    offset_y - orientation offset
         *a    offset_p - orientation offset
         **
         **    yaw and pitch represent PERCENTAGES of the camera's
         **    horizontal and vertical field of view, respectively.  The
         **    ROLL (which is in degrees) is applied first, then the yaw,
         **    then the pitch.
         **
         **    A typical two screen arrangement would use yaws of 50 and -50 for the
         **    left screen, and right screen, respectively.  For three screens, the
         **    yaws would be -100, 0, and 100.
         **
         **    Using percentages this way makes the screens contiguous even if the
         **    camera's field of view changes.
         **
         **    THIS FUNCTION DOES NOTHING (and returns -1) if called while VR-Link is
         **    online
         **
         *b  Returns:
         **
         **    0 on success, -1 on failure (VR-Link is online).
         */
        virtual int set_sync_mode_camera_offset(float offset_r, float offset_y, float offset_p) = 0;

        /*l
         *b  Description:
         **
         **    This function gets the camera orientation offset to be used in
         **    sync_mode (when VR-Link is online).
         **
         *b  Arguments:
         **
         *a    offset_r - orientation offset
         *a    offset_y - orientation offset
         *a    offset_p - orientation offset
         **
         **    yaw and pitch represent PERCENTAGES of the camera's
         **    horizontal and vertical field of view, respectively.  The
         **    ROLL (which is in degrees) is applied first, then the yaw,
         **    then the pitch.
         **
         **    In the orientation offset the yaw and pitch
         **    represent PERCENTAGES of the camera's horizontal and vertical field
         **    of view, respectively.  The ROLL (which is in degrees) is applied
         **    first, then the yaw, then the pitch.
         **
         **    A typical two screen arrangement would use yaws of 50 and -50 for the
         **    left screen, and right screen, respectively.  For three screens, the
         **    yaws would be 100, 0, and -100 going from left to right.
         **
         **    Using percentages this way makes the screens contiguous even if the
         **    camera's field of view changes.
         **
         *b  Returns:
         **
         **    0 on success, -1 on failure
         */
        virtual int get_sync_mode_camera_offset(float* offset_r,
                float* offset_y,
                float* offset_p) = 0;

        /*l
         *b  Description:
         **
         **    This function sets whether the camera will be slaved when VR-Link is
         **    online, in sync mode, and not sync master.
         **
         **    It can be set even when VR-Link is online.
         **
         *b  Arguments:
         **
         *a    slaved   - whether the camera will be slaved when VR-Link is
         **               online, in sync mode, and not sync master.
         **
         *b  Returns:
         **
         **    0 on success, -1 on failure
         */
        virtual int set_sync_mode_camera_slaved(int slaved) = 0;

        /*l
         *b  Description:
         **
         **    This function gets whether the camera is currently slaved.  It does
         **    NOT simply return what was passed to set_sync_mode_camera_slaved().
         **
         *b  Returns:
         **
         **    Whether the camera is currently slaved.  This will be 1 only if
         **    VR-link is online, is in sync mode, and is not the sync master, and if
         **    sync_mode_camera_slaved has been set to 1.
         */
        virtual int get_sync_mode_camera_slaved() = 0;

        /*l
         *b  Description:
         **
         **    Lets VR-Link know that the user has moved the camera, so that if
         **    it is in sync mode, and is the sync master, it can let other hosts
         **    know the new camera position so they can move their cameras.
         **
         *b  Returns:
         **
         **    0 on success, -1 on failure
         */
        virtual int set_camera_details_out_of_date() = 0;


        /*l
         *b  Description:
         **
         **    Lets DI-Guy know that it should use an adaptive guide that attempts
         **    to fix reckoning errors by stepping. Defaults to on.
         **
         *b  Returns:
         **
         **    0 on success, -1 on failure
         */
        virtual int set_use_adaptive_guide(int use_adaptive_guide) = 0;

        /*l
         *b  Returns:
         **
         **    0 if adaptive guide is disabled 1 otherwise.
         */
        virtual int get_use_adaptive_guide() = 0;


/****************************************************************************/
/****************************************************************************/
/*****************************************************************************/
/****************************************************************************/
/****************************************************************************/
/****************************************************************************/

        virtual int set_fom_file_name(const char* file_name);
        virtual const char* get_fom_file_name();

        virtual int set_base_module_name(const char* file_name);
        virtual const char* get_base_module_name();

        virtual int set_rpr_fom_version( float version );
        virtual float get_rpr_fom_version() const;

        virtual int set_rpr_fom_revision( int revision );
        virtual int get_rpr_fom_revision() const;

        virtual int set_culling_enabled(int culling);
        virtual int get_culling_enabled();

        /*l
         *b  Description:
         **
         **    Sets whether network datetime data will be broadcast via custom
         **    PDUs.
         **
         **    *NOTE:*  This is functionality that is under development and
         **    should currently not be used by non DI-Guy programmers.
         **
         *b  Arguments:
         **
         *a    enable_diguy_custom_pdus - pass 1 to broadcast network datetime
         *a                               data via custom PDUs, 0 to not
         */
        virtual void set_network_datetime_enable_diguy_custom_pdus(int enable_diguy_custom_pdus);

        /*l
         *b  Returns:
         **
         **    1 if network datetime data will be broadcast via custom PDUs, 0 if
         **    not
         */
        virtual int  get_network_datetime_enable_diguy_custom_pdus();

        /*l
         *b  Description:
         **
         **    Sets whether this host will send DIS standard start/resume PDUs.
         **
         **    *NOTE:*  This is functionality that is under development and
         **    should currently not be used by non DI-Guy programmers.
         **
         *b  Arguments:
         **
         *a    enable_dis_start_resume_pdus - pass 1 to send DIS start/resume
         *a                                   PDUs, 0 to not
         */
        virtual void set_network_datetime_enable_dis_start_resume_pdus(int enable_dis_start_resume_pdus);

        /*l
         *b  Returns:
         **
         **    1 if DIS start/resume should be send, 0 if not
         */
        virtual int  get_network_datetime_enable_dis_start_resume_pdus();

        virtual int set_draw_laser_designators_effects(int enabled) = 0;
        virtual int get_draw_laser_designators_effects() = 0;

        virtual int set_laser_designators_effects_visible(int visible) = 0;

        virtual int set_draw_laser_designators_lines(int enabled) = 0;
        virtual int get_draw_laser_designators_lines() = 0;

        virtual int set_use_wildcards_in_munitions_map(int enabled) = 0;
        virtual int get_use_wildcards_in_munitions_map() = 0;


        /*l
         **   internal functions
         */
        virtual int server_mode() = 0;
        virtual int client_mode() = 0;
        virtual void establish_new_offsets() = 0;
        virtual void draw() = 0;
        virtual bdiDataTracker* get_network_datetime_data_tracker() = 0;

public:

        diguyNetInterfaceData* get_data() {return m_data;}

protected:

        diguyNetInterfaceData* m_data;

        virtual int update_coordinate_sytem() = 0;
        virtual int update_settings() = 0;
        /*l
         **    A private constructor.  Use the DI-Guy function
         **    diguy_module_net_initialize() to create a diguyNetInterface.  Use
         **    get_net_interface() to obtain a pointer to it.
         */
        diguyNetInterface();

        /*l
         **    A private destructor.  Use the DI-Guy function
         **    diguy_module_net_deinitialize() to destroy the diguyNetInterface.
         */
        virtual ~diguyNetInterface();

        friend BDI_DECLSPEC_diguy int diguy_module_net_initialize();

};