/// <summary>
/// Encodes a point along line location.
/// </summary>
public static byte[] Encode(PointAlongLineLocation location)
{
var data = new byte[17];
var header = new Header();
header.Version = 3;
header.HasAttributes = true;
header.ArF0 = false;
header.IsPoint = true;
header.ArF1 = false;
HeaderConvertor.Encode(data, 0, header);
CoordinateConverter.Encode(location.First.Coordinate, data, 1);
FunctionalRoadClassConvertor.Encode(location.First.FuntionalRoadClass.Value, data, 7, 2);
FormOfWayConvertor.Encode(location.First.FormOfWay.Value, data, 7, 5);
FunctionalRoadClassConvertor.Encode(location.First.LowestFunctionalRoadClassToNext.Value, data, 8, 0);
BearingConvertor.Encode(BearingConvertor.EncodeAngleToBearing(location.First.Bearing.Value), data, 8, 3);
data[9] = DistanceToNextConvertor.Encode(location.First.DistanceToNext);
CoordinateConverter.EncodeRelative(location.First.Coordinate, location.Last.Coordinate, data, 10);
FunctionalRoadClassConvertor.Encode(location.Last.FuntionalRoadClass.Value, data, 14, 2);
FormOfWayConvertor.Encode(location.Last.FormOfWay.Value, data, 14, 5);
BearingConvertor.Encode(BearingConvertor.EncodeAngleToBearing(location.Last.Bearing.Value), data, 15, 3);
OrientationConverter.Encode(location.Orientation.Value, data, 7, 0);
SideOfRoadConverter.Encode(location.SideOfRoad.Value, data, 14, 0);
if (location.PositiveOffsetPercentage.HasValue)
{ // positive offset percentage is present.
OffsetConvertor.Encode(location.PositiveOffsetPercentage.Value, data, 16);
}
return(data);
}
public void TestEncoding1()
{
// specify coordinate.
var coordinate = new Coordinate()
{
Latitude = 0,
Longitude = 0
};
// encode.
var data = new byte[6];
CoordinateConverter.Encode(coordinate, data, 0);
Assert.AreEqual(data[0], 0);
Assert.AreEqual(data[1], 0);
Assert.AreEqual(data[2], 0);
Assert.AreEqual(data[3], 0);
Assert.AreEqual(data[4], 0);
Assert.AreEqual(data[5], 0);
// specify coordinate.
coordinate = new Coordinate()
{
Latitude = 0.005460978,
Longitude = 0.005460978
};
// encode.
CoordinateConverter.Encode(coordinate, data, 0);
Assert.AreEqual(data[0], 0);
Assert.AreEqual(data[1], 0);
Assert.AreEqual(data[2], 255);
Assert.AreEqual(data[3], 0);
Assert.AreEqual(data[4], 0);
Assert.AreEqual(data[5], 255);
// specify coordinate.
coordinate = new Coordinate()
{
Latitude = 49.60851,
Longitude = 6.12683
};
// encode.
CoordinateConverter.Encode(coordinate, data, 0);
Assert.AreEqual(data[0], 4);
Assert.AreEqual(data[1], 91);
Assert.AreEqual(data[2], 91);
Assert.AreEqual(data[3], 35);
Assert.AreEqual(data[4], 70);
Assert.AreEqual(data[5], 244);
}
public void RegressionTestEncodeDecodeNegative()
{
var delta = 0.0001;
// specify coordinate.
var coordinate = new Coordinate()
{
Latitude = -52.932136535644531,
Longitude = -1.5213972330093384
};
// encode.
var data = new byte[1024];
CoordinateConverter.Encode(coordinate, data, 0);
var decoded = CoordinateConverter.Decode(data);
Assert.AreEqual(coordinate.Latitude, decoded.Latitude, delta);
Assert.AreEqual(coordinate.Longitude, decoded.Longitude, delta);
}
/// <summary>
/// Encodes a point along line location.
/// </summary>
/// <param name="location"></param>
/// <returns></returns>
protected override byte[] EncodeByteArray(LineLocation location)
{
int size = 18;
if (location.Intermediate != null)
{ // each intermediate adds 7 bytes.
size = size + (location.Intermediate.Length * 7);
}
byte[] data = new byte[size];
var header = new Header();
header.Version = 3;
header.HasAttributes = true;
header.ArF0 = false;
header.IsPoint = false;
header.ArF1 = false;
HeaderConvertor.Encode(data, 0, header);
CoordinateConverter.Encode(location.First.Coordinate, data, 1);
FunctionalRoadClassConvertor.Encode(location.First.FuntionalRoadClass.Value, data, 7, 2);
FormOfWayConvertor.Encode(location.First.FormOfWay.Value, data, 7, 5);
FunctionalRoadClassConvertor.Encode(location.First.LowestFunctionalRoadClassToNext.Value, data, 8, 0);
BearingConvertor.Encode(BearingConvertor.EncodeAngleToBearing(location.First.Bearing.Value), data, 8, 3);
data[9] = DistanceToNextConvertor.Encode(location.First.DistanceToNext);
// calculate the intermediate points count.
var position = 10;
var reference = location.First.Coordinate;
if (location.Intermediate != null)
{
for (int idx = 0; idx < location.Intermediate.Length; idx++)
{ // create an intermediate point.
var intermediate = location.Intermediate[idx];
CoordinateConverter.EncodeRelative(location.First.Coordinate, intermediate.Coordinate, data, position);
reference = intermediate.Coordinate;
position = position + 4;
FunctionalRoadClassConvertor.Encode(intermediate.FuntionalRoadClass.Value, data, position, 2);
FormOfWayConvertor.Encode(intermediate.FormOfWay.Value, data, position, 5);
position = position + 1;
BearingConvertor.Encode(BearingConvertor.EncodeAngleToBearing(intermediate.Bearing.Value), data, position, 3);
FunctionalRoadClassConvertor.Encode(intermediate.LowestFunctionalRoadClassToNext.Value, data, position, 0);
position = position + 1;
data[position] = DistanceToNextConvertor.Encode(intermediate.DistanceToNext);
position = position + 1;
}
}
CoordinateConverter.EncodeRelative(reference, location.Last.Coordinate, data, position);
FunctionalRoadClassConvertor.Encode(location.Last.FuntionalRoadClass.Value, data, position + 4, 2);
FormOfWayConvertor.Encode(location.Last.FormOfWay.Value, data, position + 4, 5);
BearingConvertor.Encode(BearingConvertor.EncodeAngleToBearing(location.Last.Bearing.Value), data, position + 5, 3);
if (location.PositiveOffsetPercentage.HasValue)
{ // positive offset percentage is present.
OffsetConvertor.EncodeFlag(true, data, position + 5, 1);
OffsetConvertor.Encode(location.PositiveOffsetPercentage.Value, data, position + 6);
}
if (location.NegativeOffsetPercentage.HasValue)
{ // positive offset percentage is present.
OffsetConvertor.EncodeFlag(true, data, position + 5, 2);
OffsetConvertor.Encode(location.NegativeOffsetPercentage.Value, data, position + 7);
}
return(data);
}
