/**
* A utility function which returns the world origin based on values in
* the LVC configuration file. Defaults to (0,0,0) if no values are set in
* the configuration.
*/
private static void InitializeLVCWorldOrigin()
{
// have we already done this?
if( isLvcWorldOriginInitialised )
// no need to go any further
return;
// check for values specified in configuration file
if( LVCUtils.HasAllLVCConfigValues( CONF_UNITYCLIENT_FILENAME,
new string[]{CONF_OriginLatitude, CONF_OriginLongitude}) )
{
// user has specified the world origin using latitude, longitude and altitude
// check if they have used the 93*23'52.60" style format for degress minutes and seconds,
// or specified it as a decimal value in radians...
double latitude = 0.0;
string latitudeStr = GetLVCConfigValue( CONF_UNITYCLIENT_FILENAME, CONF_OriginLatitude, "0.0" );
double longitude = 0.0;
string longitudeStr = GetLVCConfigValue( CONF_UNITYCLIENT_FILENAME, CONF_OriginLongitude, "0.0" );
try
{
// assume latitude is in raw radians to begin with
latitude = System.Convert.ToDouble( latitudeStr );
}
catch(System.FormatException)
{
// fall back to d*m's" notation for latitude
latitude = Degrees2Radians( DMStoDegrees( latitudeStr) );
}
try
{
// assume longitude is in raw radians to begin with
longitude = System.Convert.ToDouble( longitudeStr );
}
catch(System.FormatException)
{
// fall back to d*m's" notation for longitude
longitude = Degrees2Radians( DMStoDegrees( longitudeStr) );
}
// altitude is simple as it is in meters - just get the value
double altitude = GetDoubleLVCConfigValue( CONF_UNITYCLIENT_FILENAME, CONF_OriginAltitude, 0.0 );
// initialise the world origin vector
lvcWorldOriginLLA = new LVCGame.Vector3( latitude, longitude, altitude );
lvcWorldOriginUTM = LVCGame.LVCCoordinates.llaToUtm( ref lvcWorldOriginLLA );
}
else if( HasAllLVCConfigValues(CONF_UNITYCLIENT_FILENAME,
new string[]{CONF_OriginEasting, CONF_OriginNorthing, CONF_OriginHemisphere, CONF_OriginZone}) )
{
// user has specified the world origin using UTM (Easting, Northing, Hemisphere and Zone)
double easting = GetDoubleLVCConfigValue( CONF_UNITYCLIENT_FILENAME, CONF_OriginEasting, 0.0 );
double northing = GetDoubleLVCConfigValue( CONF_UNITYCLIENT_FILENAME, CONF_OriginNorthing, 0.0 );
double altitude = GetDoubleLVCConfigValue( CONF_UNITYCLIENT_FILENAME, CONF_OriginAltitude, 0.0 );
char hemisphere = GetLVCConfigValue( CONF_UNITYCLIENT_FILENAME, CONF_OriginHemisphere, "N" )[0];
int zone = GetIntLVCConfigValue( CONF_UNITYCLIENT_FILENAME, CONF_OriginZone, 0 );
// initialise the world origin from the extracted UTM values
lvcWorldOriginUTM = new LVCGame.UTMCoordinate( easting, northing, altitude, zone, hemisphere );
lvcWorldOriginLLA = LVCGame.LVCCoordinates.utmToLla( ref lvcWorldOriginUTM );
}
else
{
// assume that the world origin is at lat/long (0*0'0", 0*0'0")
lvcWorldOriginUTM = new LVCGame.UTMCoordinate( 166021, 0, 0, 31, 'N' );
lvcWorldOriginLLA = new LVCGame.Vector3( 0.0, 0.0, 0.0 );
}
Debug.Log("World origin is at LLA ("+LVCUtils.RadiansToDMS(lvcWorldOriginLLA.x, 2)+", "
+LVCUtils.RadiansToDMS(lvcWorldOriginLLA.y, 2)+", "
+lvcWorldOriginLLA.z+"m)"
+", UTM ("+DisplayFormatted(lvcWorldOriginUTM)+")" );
// ...and we're done.
isLvcWorldOriginInitialised = true;
}
/**
* Convert a Unity Engine Quaternion orientation into an LVC Game Vector 3, correcting for
* the different interpretations of rotation axes between the systems
* AXIS (+ve): | UNITY | LVC |
* ------------+-------+-----
* ROLL | X | -Z
* YAW | Y | X
* PITCH | Z | Y
*
* @param UEv3 the Unity Engine Vector3 to convert
* @return the equivalent LVC Game Vector3, with corrected axes
*/
public static LVCGame.Vector3 UnityOrientation_to_LVCGameOrientation( UnityEngine.Quaternion orientation )
{
UnityEngine.Vector3 eulerAngles = orientation.eulerAngles;
LVCGame.Vector3 result = new LVCGame.Vector3(
LVCUtils.Degrees2Radians( eulerAngles.y ), // YAW
LVCUtils.Degrees2Radians( eulerAngles.z ), // PITCH
-LVCUtils.Degrees2Radians( eulerAngles.x ) // ROLL
);
return result;
}
