private VarIntPacker(int smallBits, int mediumBits, int largeBits, bool throwIfOverLarge)
{
this.throwIfOverLarge = throwIfOverLarge;
if (smallBits == 0)
{
throw new ArgumentException("Small value can not be zero", nameof(smallBits));
}
if (smallBits >= mediumBits)
{
throw new ArgumentException("Medium value must be greater than small value", nameof(mediumBits));
}
if (mediumBits >= largeBits)
{
throw new ArgumentException("Large value must be greater than medium value", nameof(largeBits));
}
if (largeBits > 64)
{
throw new ArgumentException("Large bits must be 64 or less", nameof(largeBits));
}
// force medium to also be 62 or less so we can use 1 write call (2 bits to say its medium + 62 value bits
if (mediumBits > 62)
{
throw new ArgumentException("Medium bits must be 62 or less", nameof(mediumBits));
}
smallBitCount = smallBits;
mediumBitsCount = mediumBits;
largeBitsCount = largeBits;
// mask is also max value for n bits
smallValue = BitMask.Mask(smallBits);
mediumValue = BitMask.Mask(mediumBits);
largeValue = BitMask.Mask(largeBits);
}
/// <param name="quaternionBitLength">10 per "smallest 3" is good enough for most people</param>
public QuaternionPacker(int quaternionBitLength = 10)
{
// (this.BitLength - 1) because pack sign by itself
bitCountPerElement = quaternionBitLength;
totalBitCount = 2 + (quaternionBitLength * 3);
floatPacker = new FloatPacker(MaxValue, quaternionBitLength);
readMask = (uint)BitMask.Mask(bitCountPerElement);
}
/// <param name="quaternionBitLength">10 per "smallest 3" is good enough for most people</param>
public QuaternionPacker(int quaternionBitLength = 10)
{
// (this.BitLength - 1) because pack sign by itself
_bitCountPerElement = quaternionBitLength;
_totalBitCount = 2 + (quaternionBitLength * 3);
_floatPacker = new FloatPacker(MAX_VALUE, quaternionBitLength);
_readMask = (uint)BitMask.Mask(_bitCountPerElement);
}