public static byte[] compressVectorArray(Vector3[] data, CPVectorCompressionMode compressionMode)
{
float recPrecision = getModeResize(compressionMode);
float precision = 1.0f / recPrecision;
int bitSize = getModeBitsize(compressionMode);
/* 7 bytes
* 3 for size
* 1 for rounding ((size*3 * bitSize) >> 3) */
int size = data.Length;
int bytesSize = ((size * 3 * bitSize) >> 3) + 4;
BitOutputStream bitOutputStream = new BitOutputStream(bytesSize);
bitOutputStream.WriteBits(24, size);
for (int i = 0; i < size; i++)
{
int value = vectorFloatToInt(data[i].x, recPrecision, precision);
bitOutputStream.WriteBits(bitSize, value);
value = vectorFloatToInt(data[i].y, recPrecision, precision);
bitOutputStream.WriteBits(bitSize, value);
value = vectorFloatToInt(data[i].z, recPrecision, precision);
bitOutputStream.WriteBits(bitSize, value);
}
return(bitOutputStream.GetData());
}
public static int getModeBitsize(CPVectorCompressionMode mode)
{
switch (mode)
{
case CPVectorCompressionMode.LOW_UNIT_PRECISION: return(LOW_UNIT_BITSIZE);
case CPVectorCompressionMode.MEDIUM_UNIT_PRECISION: return(MEDIUM_UNIT_BITSIZE);
case CPVectorCompressionMode.HIGH_UNIT_PRECISION: return(HIGH_UNIT_BITSIZE);
}
return(0);
}
public static float getModeResize(CPVectorCompressionMode mode)
{
switch (mode)
{
case CPVectorCompressionMode.LOW_UNIT_PRECISION: return(LOW_UNIT_TICKS * 0.5f);
case CPVectorCompressionMode.MEDIUM_UNIT_PRECISION: return(MEDIUM_UNIT_TICKS * 0.5f);
case CPVectorCompressionMode.HIGH_UNIT_PRECISION: return(HIGH_UNIT_TICKS * 0.5f);
}
return(0);
}
public static Vector3[] getCompressedVectorArray(byte[] data, CPVectorCompressionMode compressionMode)
{
float recPrecision = getModeResize(compressionMode);
float precision = 1.0f / recPrecision;
BitInputStream bitInputStream = new BitInputStream(data);
int bitsSize = getModeBitsize(compressionMode);
int size = bitInputStream.ReadBits(24);
Vector3[] values = new Vector3[size];
for (int i = 0; i < values.Length; i++)
{
int read = bitInputStream.ReadBits(bitsSize);
values[i].x = (read) * precision - 1;
read = bitInputStream.ReadBits(bitsSize);
values[i].y = (read) * precision - 1;
read = bitInputStream.ReadBits(bitsSize);
values[i].z = (read) * precision - 1;
values[i].Normalize();
}
return(values);
}
