[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));
}
