[EditorBrowsable(EditorBrowsableState.Never)] // public only for tests
public static void SerializeIntoWriter(NetworkWriter writer, Vector3 position, Quaternion rotation, Compression compressRotation, Vector3 scale)
{
// serialize position
writer.WriteVector3(position);
// serialize rotation
// writing quaternion = 16 byte
// writing euler angles = 12 byte
// -> quaternion->euler->quaternion always works.
// -> gimbal lock only occurs when adding.
Vector3 euler = rotation.eulerAngles;
if (compressRotation == Compression.None)
{
// write 3 floats = 12 byte
writer.WriteSingle(euler.x);
writer.WriteSingle(euler.y);
writer.WriteSingle(euler.z);
}
else if (compressRotation == Compression.Much)
{
// write 3 byte. scaling [0,360] to [0,255]
writer.WriteByte(FloatBytePacker.ScaleFloatToByte(euler.x, 0, 360, byte.MinValue, byte.MaxValue));
writer.WriteByte(FloatBytePacker.ScaleFloatToByte(euler.y, 0, 360, byte.MinValue, byte.MaxValue));
writer.WriteByte(FloatBytePacker.ScaleFloatToByte(euler.z, 0, 360, byte.MinValue, byte.MaxValue));
}
else if (compressRotation == Compression.Lots)
{
// write 2 byte, 5 bits for each float
writer.WriteUInt16(FloatBytePacker.PackThreeFloatsIntoUShort(euler.x, euler.y, euler.z, 0, 360));
}
// serialize scale
writer.WriteVector3(scale);
}
public void TestScaleFloatToByte()
{
Assert.That(FloatBytePacker.ScaleFloatToByte(-1f, -1f, 1f, byte.MinValue, byte.MaxValue), Is.EqualTo(0));
Assert.That(FloatBytePacker.ScaleFloatToByte(0f, -1f, 1f, byte.MinValue, byte.MaxValue), Is.EqualTo(127));
Assert.That(FloatBytePacker.ScaleFloatToByte(0.5f, -1f, 1f, byte.MinValue, byte.MaxValue), Is.EqualTo(191));
Assert.That(FloatBytePacker.ScaleFloatToByte(1f, -1f, 1f, byte.MinValue, byte.MaxValue), Is.EqualTo(255));
}
public void ScaleByteToFloat()
{
Assert.That(FloatBytePacker.ScaleByteToFloat(0, byte.MinValue, byte.MaxValue, -1, 1), Is.EqualTo(-1).Within(0.0001f));
Assert.That(FloatBytePacker.ScaleByteToFloat(127, byte.MinValue, byte.MaxValue, -1, 1), Is.EqualTo(-0.003921569f).Within(0.0001f));
Assert.That(FloatBytePacker.ScaleByteToFloat(191, byte.MinValue, byte.MaxValue, -1, 1), Is.EqualTo(0.4980392f).Within(0.0001f));
Assert.That(FloatBytePacker.ScaleByteToFloat(255, byte.MinValue, byte.MaxValue, -1, 1), Is.EqualTo(1).Within(0.0001f));
}
// serialization is needed by OnSerialize and by manual sending from authority
void DeserializeFromReader(NetworkReader reader)
{
// put it into a data point immediately
DataPoint temp = new DataPoint
{
// deserialize position
localPosition = reader.ReadVector3()
};
// deserialize rotation
if (compressRotation == Compression.None)
{
// read 3 floats = 16 byte
float x = reader.ReadSingle();
float y = reader.ReadSingle();
float z = reader.ReadSingle();
temp.localRotation = Quaternion.Euler(x, y, z);
}
else if (compressRotation == Compression.Much)
{
// read 3 byte. scaling [0,255] to [0,360]
float x = FloatBytePacker.ScaleByteToFloat(reader.ReadByte(), byte.MinValue, byte.MaxValue, 0, 360);
float y = FloatBytePacker.ScaleByteToFloat(reader.ReadByte(), byte.MinValue, byte.MaxValue, 0, 360);
float z = FloatBytePacker.ScaleByteToFloat(reader.ReadByte(), byte.MinValue, byte.MaxValue, 0, 360);
temp.localRotation = Quaternion.Euler(x, y, z);
}
else if (compressRotation == Compression.Lots)
{
// read 2 byte, 5 bits per float
Vector3 xyz = FloatBytePacker.UnpackUShortIntoThreeFloats(reader.ReadUInt16(), 0, 360);
temp.localRotation = Quaternion.Euler(xyz.x, xyz.y, xyz.z);
}
temp.localScale = reader.ReadVector3();
temp.timeStamp = Time.time;
// movement speed: based on how far it moved since last time
// has to be calculated before 'start' is overwritten
temp.movementSpeed = EstimateMovementSpeed(goal, temp, targetComponent.transform, syncInterval);
// reassign start wisely
// -> first ever data point? then make something up for previous one
// so that we can start interpolation without waiting for next.
if (start == null)
{
start = new DataPoint
{
timeStamp = Time.time - syncInterval,
// local position/rotation for VR support
localPosition = targetComponent.transform.localPosition,
localRotation = targetComponent.transform.localRotation,
localScale = targetComponent.transform.localScale,
movementSpeed = temp.movementSpeed
};
}
// -> second or nth data point? then update previous, but:
// we start at where ever we are right now, so that it's
// perfectly smooth and we don't jump anywhere
//
// example if we are at 'x':
//
// A--x->B
//
// and then receive a new point C:
//
// A--x--B
// |
// |
// C
//
// then we don't want to just jump to B and start interpolation:
//
// x
// |
// |
// C
//
// we stay at 'x' and interpolate from there to C:
//
// x..B
// \ .
// \.
// C
//
else
{
float oldDistance = Vector3.Distance(start.localPosition, goal.localPosition);
float newDistance = Vector3.Distance(goal.localPosition, temp.localPosition);
start = goal;
// teleport / lag / obstacle detection: only continue at current
// position if we aren't too far away
//
// // local position/rotation for VR support
if (Vector3.Distance(targetComponent.transform.localPosition, start.localPosition) < oldDistance + newDistance)
{
start.localPosition = targetComponent.transform.localPosition;
start.localRotation = targetComponent.transform.localRotation;
start.localScale = targetComponent.transform.localScale;
}
}
// set new destination in any case. new data is best data.
goal = temp;
}