/// <summary>
/// Decompress position from the integers in the buffer, required bytes count: <see cref="PositionRequiredBytes"/>
/// </summary>
/// <param name="bytesStack">Buffer where position is pushed</param>
/// <returns>Decompressed position</returns>
public static Vector3 PopDecompressedPosition(this BytesStack bytesStack)
{
//Always use little-endian so compression and decompression are machines independent
var intX = bytesStack.PopInt(PositionXRequiredBytes);
var intY = bytesStack.PopInt(PositionYRequiredBytes);
var intZ = bytesStack.PopInt(PositionZRequiredBytes);
return(BitConverter.IsLittleEndian
? new Vector3(DecompressPositionX(intX), DecompressPositionY(intY), DecompressPositionZ(intZ))
: new Vector3(DecompressPositionX(SwapEndianness(intX)), DecompressPositionY(SwapEndianness(intY)),
DecompressPositionZ(SwapEndianness(intZ))));
}
/// <summary>
/// Decompress vector3 from the integers in the buffer
/// </summary>
/// <param name="bytesStack">Buffer where vector3 is pushed</param>
/// <param name="minElementValue">Minimal value of the encoded vector3</param>
/// <param name="maxElementValue">Maximal value of the encoded vector3</param>
/// <param name="bytesPerElement">Bytes count that will be used per each element</param>
/// <returns>Decompressed vector3</returns>
public static Vector3 PopDecompressedVector3(this BytesStack bytesStack, float minElementValue,
float maxElementValue, int bytesPerElement)
{
//Always use little-endian so compression and decompression are machines independent
var intX = bytesStack.PopInt(bytesPerElement);
var intY = bytesStack.PopInt(bytesPerElement);
var intZ = bytesStack.PopInt(bytesPerElement);
return(BitConverter.IsLittleEndian
? new Vector3(DecompressFloatFromInt(intX, minElementValue, maxElementValue, bytesPerElement),
DecompressFloatFromInt(intY, minElementValue, maxElementValue, bytesPerElement),
DecompressFloatFromInt(intZ, minElementValue, maxElementValue, bytesPerElement))
: new Vector3(
DecompressFloatFromInt(SwapEndianness(intX), minElementValue, maxElementValue, bytesPerElement),
DecompressFloatFromInt(SwapEndianness(intY), minElementValue, maxElementValue, bytesPerElement),
DecompressFloatFromInt(SwapEndianness(intZ), minElementValue, maxElementValue, bytesPerElement)));
}
/// <summary>
/// Decompress color from the integers in the buffer
/// </summary>
/// <param name="bytesStack">Buffer where color is pushed</param>
/// <param name="bytesPerElement">Bytes count that will be used per each element</param>
/// <returns>Decompressed vector3</returns>
public static Color PopDecompressedColor(this BytesStack bytesStack, int bytesPerElement)
{
//Always use little-endian so compression and decompression are machines independent
var intR = bytesStack.PopInt(bytesPerElement);
var intG = bytesStack.PopInt(bytesPerElement);
var intB = bytesStack.PopInt(bytesPerElement);
var intA = bytesStack.PopInt(bytesPerElement);
return(BitConverter.IsLittleEndian
? new Color(DecompressFloatFromInt(intR, 0.0f, 1.0f, bytesPerElement),
DecompressFloatFromInt(intG, 0.0f, 1.0f, bytesPerElement),
DecompressFloatFromInt(intB, 0.0f, 1.0f, bytesPerElement),
DecompressFloatFromInt(intA, 0.0f, 1.0f, bytesPerElement))
: new Color(
DecompressFloatFromInt(SwapEndianness(intR), 0.0f, 1.0f, bytesPerElement),
DecompressFloatFromInt(SwapEndianness(intG), 0.0f, 1.0f, bytesPerElement),
DecompressFloatFromInt(SwapEndianness(intB), 0.0f, 1.0f, bytesPerElement),
DecompressFloatFromInt(SwapEndianness(intA), 0.0f, 1.0f, bytesPerElement)));
}
/// <summary>
/// Decompress rotation from the integers in the buffer, required bytes count: <see cref="RotationPrecision"/>
/// </summary>
/// <param name="bytesStack">Buffer where rotation is pushed</param>
/// <returns>Decompressed rotation</returns>
public static Quaternion PopDecompressedRotation(this BytesStack bytesStack)
{
// Read the index of the maximum element
var maxIndex = bytesStack.PopByte();
// Indexed 4-7 determine that maximum element is approximately equal to 1.0f and other elements are not encoded
// Other elements are approximately equal to 0.0f;
if (maxIndex >= 4 && maxIndex <= 7)
{
var x = (maxIndex == 4) ? 1f : 0f;
var y = (maxIndex == 5) ? 1f : 0f;
var z = (maxIndex == 6) ? 1f : 0f;
var w = (maxIndex == 7) ? 1f : 0f;
return(new Quaternion(x, y, z, w));
}
// Read and decompress the "smallest three" values
var a = DecompressFloatFromInt(bytesStack.PopInt(DefaultBytesForCompressedFloat),
-1.0f, 1.0f, DefaultBytesForCompressedFloat);
var b = DecompressFloatFromInt(bytesStack.PopInt(DefaultBytesForCompressedFloat),
-1.0f, 1.0f, DefaultBytesForCompressedFloat);
var c = DecompressFloatFromInt(bytesStack.PopInt(DefaultBytesForCompressedFloat),
-1.0f, 1.0f, DefaultBytesForCompressedFloat);
// Count the maximum value
var d = Mathf.Sqrt(1f - (a * a + b * b + c * c));
// Reconstruct the quaternion from its elements
if (maxIndex == 0)
{
return(new Quaternion(d, a, b, c));
}
if (maxIndex == 1)
{
return(new Quaternion(a, d, b, c));
}
if (maxIndex == 2)
{
return(new Quaternion(a, b, d, c));
}
return(new Quaternion(a, b, c, d));
}
/// <summary>
/// Pops the enum value from the bytes stack
/// </summary>
/// <param name="bytesStack">Buffer where enum is pushed</param>
/// <typeparam name="T">Enum type</typeparam>
/// <returns>Enum value decompressed from the bytes stack</returns>
public static T PopEnum <T>(this BytesStack bytesStack) where T : IComparable, IConvertible, IFormattable
{
var intValue = bytesStack.PopInt(RequiredBytes <T>());
return((T)Enum.ToObject(typeof(T), intValue));
}
