internal static W3dAdaptiveDeltaBlock Parse(BinaryReader reader, int vectorIndex, int numBits)
{
var result = new W3dAdaptiveDeltaBlock
{
VectorIndex = vectorIndex,
BlockIndex = reader.ReadByte()
};
var numDeltaBytes = numBits * 2;
var deltaBytes = new sbyte[numDeltaBytes];
for (var k = 0; k < numDeltaBytes; k++)
{
deltaBytes[k] = reader.ReadSByte();
}
result.DeltaBytes = deltaBytes;
return(result);
}
internal static W3dAdaptiveDeltaData Parse(
BinaryReader reader,
uint numFrames,
W3dAnimationChannelType type,
int vectorLength,
W3dAdaptiveDeltaBitCount bitCount)
{
var count = (numFrames + 15) >> 4;
// First read all initial values
var result = new W3dAdaptiveDeltaData
{
BitCount = bitCount,
VectorLength = vectorLength,
InitialDatum = W3dAnimationChannelDatum.Parse(reader, type)
};
var numBits = (int)bitCount;
// Then read the interleaved delta blocks
var deltaBlocks = new W3dAdaptiveDeltaBlock[count * vectorLength];
for (var i = 0; i < count; i++)
{
for (var j = 0; j < vectorLength; j++)
{
deltaBlocks[(i * vectorLength) + j] = W3dAdaptiveDeltaBlock.Parse(
reader,
j,
numBits);
}
}
result.DeltaBlocks = deltaBlocks;
return(result);
}
