internal static W3dMotionChannelAdaptiveDeltaData Parse(
BinaryReader reader,
uint numTimeCodes,
W3dAnimationChannelType channelType,
int vectorLen,
W3dAdaptiveDeltaBitCount bitCount)
{
return(new W3dMotionChannelAdaptiveDeltaData
{
Scale = reader.ReadSingle(),
Data = W3dAdaptiveDeltaData.Parse(
reader,
numTimeCodes,
channelType,
vectorLen,
bitCount)
});
}
public sbyte[] GetDeltas(W3dAdaptiveDeltaBitCount bitCount)
{
var numBits = (int)bitCount;
var deltas = new sbyte[16];
for (var i = 0; i < DeltaBytes.Length; ++i)
{
switch (numBits)
{
case 4:
deltas[i * 2] = DeltaBytes[i];
if ((deltas[i * 2] & 8) != 0)
{
deltas[i * 2] = (sbyte)(deltas[i * 2] | 0xF0);
}
else
{
deltas[i * 2] &= 0x0F;
}
deltas[i * 2 + 1] = (sbyte)(DeltaBytes[i] >> 4);
break;
case 8:
var val = (byte)DeltaBytes[i];
//do a bitflip
if ((val & 0x80) != 0)
{
val &= 0x7F;
}
else
{
val |= 0x80;
}
deltas[i] = (sbyte)val;
break;
default:
throw new ArgumentOutOfRangeException(nameof(bitCount));
}
}
return(deltas);
}
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);
}
internal static W3dAdaptiveDeltaAnimationChannel Parse(BinaryReader reader, W3dParseContext context, W3dAdaptiveDeltaBitCount bitCount)
{
return(ParseChunk(reader, context, header =>
{
var result = new W3dAdaptiveDeltaAnimationChannel
{
NumTimeCodes = reader.ReadUInt32(),
Pivot = reader.ReadUInt16(),
VectorLength = reader.ReadByte(),
ChannelType = reader.ReadByteAsEnum <W3dAnimationChannelType>(),
Scale = reader.ReadSingle(),
};
W3dAnimationChannel.ValidateChannelDataSize(result.ChannelType, result.VectorLength);
result.Data = W3dAdaptiveDeltaData.Parse(
reader,
result.NumTimeCodes,
result.ChannelType,
result.VectorLength,
bitCount);
// Skip 3 unknown bytes at chunk end.
reader.BaseStream.Seek(3, SeekOrigin.Current);
return result;
}));
}
