public static string CompressData(Chunk chunk)
{
// returns the data of chunk in compressed string format
StringWriter writer = new StringWriter();
int i = 0;
int length = chunk.GetDataLength(); // length of VoxelData array
ushort currentCount = 0; // count of consecutive voxels of the same type
ushort currentData = 0; // data of the current voxel
for (i = 0; i < length; i++)
{
// for each voxel
ushort thisData = chunk.GetVoxelSimple(i); // read raw data at i
if (thisData != currentData)
{
// if the data is different from the previous data, write the last block and start a new one
// write previous block
if (i != 0)
{ // (don't write in the first loop iteration, because count would be 0 (no previous blocks))
writer.Write((char)currentCount);
writer.Write((char)currentData);
}
// start new block
currentCount = 1;
currentData = thisData;
}
else
{
// if the data is the same as the last data, simply add to the count
currentCount++;
}
if (i == length - 1)
{
// if this is the last iteration of the loop, close and write the current block
writer.Write((char)currentCount);
writer.Write((char)currentData);
}
}
string compressedData = writer.ToString();
writer.Flush();
writer.Close();
return(compressedData);
}
public static Dictionary<string, string> TempChunkData; // stores chunk's data to write into a region file later
#endregion Fields
#region Methods
public static string CompressData( Chunk chunk )
{
// returns the data of chunk in compressed string format
StringWriter writer = new StringWriter();
int i = 0;
int length = chunk.GetDataLength(); // length of VoxelData array
ushort currentCount = 0; // count of consecutive voxels of the same type
ushort currentData = 0; // data of the current voxel
for (i=0; i<length; i++) { // for each voxel
ushort thisData = chunk.GetVoxelSimple(i); // read raw data at i
if (thisData != currentData) { // if the data is different from the previous data, write the last block and start a new one
// write previous block
if (i != 0) { // (don't write in the first loop iteration, because count would be 0 (no previous blocks))
writer.Write ((char)currentCount);
writer.Write ((char)currentData);
}
// start new block
currentCount = 1;
currentData = thisData;
}
else { // if the data is the same as the last data, simply add to the count
currentCount ++;
}
if (i == length-1) { // if this is the last iteration of the loop, close and write the current block
writer.Write ((char)currentCount);
writer.Write ((char)currentData);
}
}
string compressedData = writer.ToString();
writer.Flush ();
writer.Close ();
return compressedData;
}
public static void DecompressData(Chunk chunk, string data)
{
// decompresses voxel data and loads it into the VoxelData array
// check if chunk is empty
if (data.Length == 2 && data[1] == (char)0)
{
chunk.empty = true;
}
StringReader reader = new StringReader(data);
int i = 0;
int length = chunk.GetDataLength(); // length of VoxelData array
try
{
while (i < length)
{
// this loop will stop once the VoxelData array has been populated completely. Iterates once per count-data block.
ushort currentCount = (ushort)reader.Read(); // read the count
ushort currentData = (ushort)reader.Read(); // read the data
int ii = 0;
while (ii < currentCount)
{
chunk.SetVoxelSimple(i, (ushort)currentData);// write a single voxel for every currentCount
ii++;
i++;
}
}
}
catch (System.Exception)
{
Debug.LogError("Uniblocks: Corrupt chunk data for chunk: " + chunk.chunkIndex.ToString() + ". Has the data been saved using a different chunk size?");
reader.Close();
return;
}
reader.Close();
}
public static void DecompressData( Chunk chunk, string data )
{
// decompresses voxel data and loads it into the VoxelData array
// check if chunk is empty
if (data.Length == 2 && data[1] == (char)0) {
chunk.Empty = true;
}
StringReader reader = new StringReader (data);
int i = 0;
int length = chunk.GetDataLength(); // length of VoxelData array
try {
while ( i < length ) { // this loop will stop once the VoxelData array has been populated completely. Iterates once per count-data block.
ushort currentCount = (ushort) reader.Read(); // read the count
ushort currentData = (ushort) reader.Read(); // read the data
int ii = 0;
while ( ii < currentCount ) {
chunk.SetVoxelSimple (i, (ushort)currentData);// write a single voxel for every currentCount
ii ++;
i ++;
}
}
}
catch (System.Exception) {
Debug.LogError ("Uniblocks: Corrupt chunk data for chunk: " + chunk.ChunkIndex.ToString() + ". Has the data been saved using a different chunk size?");
reader.Close();
return;
}
reader.Close();
}