// buffer offset util
protected int GetNextBlock(out ChunkInd dataChunk, BinaryReader reader, FileFlags flags)
{
bool swap = false;
bool varies = false;
if ((flags & FileFlags.EndianSwap) == FileFlags.EndianSwap)
{
swap = true;
}
if ((flags & FileFlags.BitsVaries) == FileFlags.BitsVaries)
{
varies = true;
}
if (swap)
{
throw new NotImplementedException();
}
dataChunk = new ChunkInd();
if (IntPtr.Size == 8)
{
if (varies)
{
ChunkPtr4 c = new ChunkPtr4(reader);
dataChunk = new ChunkInd(ref c);
}
else
{
ChunkPtr8 c = new ChunkPtr8(reader);
dataChunk = new ChunkInd(ref c);
}
}
else
{
if (varies)
{
throw new NotImplementedException();
}
else
{
ChunkPtr4 c = new ChunkPtr4(reader);
dataChunk = new ChunkInd(ref c);
}
}
if (dataChunk.Length < 0)
{
return(-1);
}
return(dataChunk.Length + ChunkUtils.GetOffset(flags));
}
private long FindDnaChunk(BinaryReader reader)
{
var stream = reader.BaseStream;
int i = 0;
while (i < stream.Length)
{
stream.Position = i;
// looking for the data's starting position
// and the start of SDNA decls
byte[] codeData = reader.ReadBytes(4);
string code = Encoding.ASCII.GetString(codeData);
if (_dataStart == 0 && code.Equals("REND"))
{
_dataStart = stream.Position;
}
if (code == "DNA1")
{
// read the DNA1 block and extract SDNA
stream.Position = i;
if (GetNextBlock(reader) != null)
{
string sdnaname = Encoding.ASCII.GetString(reader.ReadBytes(8));
if (sdnaname == "SDNANAME")
{
return(i + ChunkUtils.GetChunkSize(Flags));
}
}
}
else if (code == "SDNA")
{
// Some Bullet files are missing the DNA1 block
// In Blender it's DNA1 + ChunkUtils.GetOffset() + SDNA + NAME
// In Bullet tests its SDNA + NAME
return(i);
}
i++;
}
Console.WriteLine("Failed to find DNA1+SDNA pair");
return(-1);
}
protected override void ReadChunks()
{
bool brokenDna = (Flags & FileFlags.BrokenDna) != 0;
_dataStart = SizeOfBlenderHeader;
long chunkPtr = _dataStart;
Stream stream = ChunkReader.BaseStream;
stream.Position = chunkPtr;
ChunkInd chunk = GetNextBlock(ChunkReader);
while (chunk.Code != DnaID.Dna)
{
long chunkDataOffset = chunkPtr + ChunkUtils.GetChunkSize(Flags);
if (!brokenDna || chunk.Code != DnaID.QuantizedBvh)
{
// One behind
if (chunk.Code == DnaID.Sdna)
{
break;
}
byte[] chunkData;
if (chunk.StructIndex >= 0)
{
_chunks.Add(chunk);
chunkData = ReadChunkData(chunk, chunkDataOffset);
switch (chunk.Code)
{
case DnaID.CollisionObject:
CollisionObjects.Add(chunkData);
break;
case DnaID.Constraint:
Constraints.Add(chunkData);
break;
case DnaID.DynamicsWorld:
DynamicsWorldInfo.Add(chunkData);
break;
case DnaID.MultiBody:
MultiBodies.Add(chunkData);
break;
case DnaID.SoftBody:
case DnaID.TriangleInfoMap:
throw new NotImplementedException();
case DnaID.QuantizedBvh:
Bvhs.Add(chunkData);
break;
case DnaID.RigidBody:
RigidBodies.Add(chunkData);
break;
case DnaID.Shape:
CollisionShapes.Add(chunkData);
break;
}
}
else
{
#if DEBUG
Console.WriteLine("unknown chunk " + chunk.Code);
#endif
chunkData = new byte[chunk.Length];
ChunkReader.Read(chunkData, 0, chunk.Length);
}
LibPointers.Add(chunk.OldPtr, chunkData);
}
else
{
#if DEBUG
Console.WriteLine("skipping B3_QUANTIZED_BVH_CODE due to broken DNA");
#endif
}
chunkPtr = chunkDataOffset + chunk.Length;
stream.Position = chunkPtr;
chunk = GetNextBlock(ChunkReader);
if (chunk.Length < 0)
{
break;
}
}
}
public override void ParseData()
{
//Console.WriteLine("Building datablocks");
//Console.WriteLine("Chunk size = {0}", CHUNK_HEADER_LEN);
//Console.WriteLine("File chunk size = {0}", ChunkUtils.GetOffset(_flags));
bool brokenDna = (_flags & FileFlags.BrokenDna) != 0;
bool swap = (_flags & FileFlags.EndianSwap) != 0;
MemoryStream memory = new MemoryStream(_fileBuffer, false);
BinaryReader reader = new BinaryReader(memory);
_dataStart = 12;
long dataPtr = _dataStart;
memory.Position = dataPtr;
ChunkInd dataChunk;
int seek = GetNextBlock(out dataChunk, reader, _flags);
if (swap)
{
throw new NotImplementedException();
//swapLen(dataPtr);
}
while (dataChunk.Code != DnaID.Dna)
{
if (!brokenDna || dataChunk.Code != DnaID.QuantizedBvh)
{
// One behind
if (dataChunk.Code == DnaID.Sdna)
{
break;
}
// same as (BHEAD+DATA dependency)
long dataPtrHead = dataPtr + ChunkUtils.GetOffset(_flags);
if (dataChunk.DnaNR >= 0)
{
byte[] id = ReadStruct(reader, dataChunk);
//m_chunkPtrPtrMap.insert(dataChunk.oldPtr, dataChunk);
_libPointers.Add(dataChunk.OldPtr, id);
_chunks.Add(dataChunk);
switch (dataChunk.Code)
{
case DnaID.CollisionObject:
CollisionObjects.Add(id);
break;
case DnaID.Constraint:
Constraints.Add(id);
break;
case DnaID.DynamicsWorld:
DynamicsWorldInfo.Add(id);
break;
case DnaID.MultiBody:
MultiBodies.Add(id);
break;
case DnaID.SoftBody:
case DnaID.TriangleInfoMap:
throw new NotImplementedException();
case DnaID.QuantizedBvh:
Bvhs.Add(id);
break;
case DnaID.RigidBody:
RigidBodies.Add(id);
break;
case DnaID.Shape:
CollisionShapes.Add(id);
break;
}
}
else
{
#if DEBUG
Console.WriteLine("unknown chunk " + dataChunk.Code);
#endif
byte[] data = new byte[dataChunk.Length];
reader.Read(data, 0, dataChunk.Length);
_libPointers.Add(dataChunk.OldPtr, data);
}
}
else
{
#if DEBUG
Console.WriteLine("skipping B3_QUANTIZED_BVH_CODE due to broken DNA");
#endif
}
dataPtr += seek;
memory.Position = dataPtr;
seek = GetNextBlock(out dataChunk, reader, _flags);
if (swap)
{
throw new NotImplementedException();
//swapLen(dataPtr);
}
if (seek < 0)
{
break;
}
}
reader.Dispose();
memory.Dispose();
}
protected void ParseInternal(FileVerboseMode verboseMode, byte[] memDna)
{
if ((_flags & FileFlags.OK) != FileFlags.OK)
{
return;
}
ChunkInd dna = new ChunkInd();
dna.OldPtr = 0;
MemoryStream memory = new MemoryStream(_fileBuffer, false);
BinaryReader reader = new BinaryReader(memory);
int i = 0;
while (memory.Position < memory.Length)
{
// looking for the data's starting position
// and the start of SDNA decls
byte[] code = reader.ReadBytes(4);
string codes = ASCIIEncoding.ASCII.GetString(code);
if (_dataStart == 0 && codes.Equals("REND"))
{
_dataStart = memory.Position;
}
if (codes.Equals("DNA1"))
{
// read the DNA1 block and extract SDNA
reader.BaseStream.Position = i;
if (GetNextBlock(out dna, reader, _flags) > 0)
{
string sdnaname = ASCIIEncoding.ASCII.GetString(reader.ReadBytes(8));
if (sdnaname.Equals("SDNANAME"))
{
dna.OldPtr = i + ChunkUtils.GetOffset(_flags);
}
else
{
dna.OldPtr = 0;
}
}
else
{
dna.OldPtr = 0;
}
}
else if (codes.Equals("SDNA"))
{
// Some Bullet files are missing the DNA1 block
// In Blender it's DNA1 + ChunkUtils::getOffset() + SDNA + NAME
// In Bullet tests its SDNA + NAME
dna.OldPtr = i;
dna.Length = (int)memory.Length - i;
// Also no REND block, so exit now.
if (_version == 276)
{
break;
}
}
if (_dataStart != 0 && dna.OldPtr != 0)
{
break;
}
i++;
memory.Position = i;
}
if (dna.OldPtr == 0 || dna.Length == 0)
{
//Console.WriteLine("Failed to find DNA1+SDNA pair");
_flags &= ~FileFlags.OK;
reader.Dispose();
memory.Dispose();
return;
}
_fileDna = new Dna();
// _fileDna.Init will convert part of DNA file endianness to current CPU endianness if necessary
memory.Position = dna.OldPtr;
_fileDna.Init(reader, (_flags & FileFlags.EndianSwap) != 0);
if (_version == 276)
{
for (i = 0; i < _fileDna.NumNames; i++)
{
if (_fileDna.GetName(i).Equals("int"))
{
_flags |= FileFlags.BrokenDna;
}
}
if ((_flags & FileFlags.BrokenDna) == FileFlags.BrokenDna)
{
//Console.WriteLine("warning: fixing some broken DNA version");
}
}
//if ((verboseMode & FileVerboseMode.DumpDnaTypeDefinitions) == FileVerboseMode.DumpDnaTypeDefinitions)
// _fileDna.DumpTypeDefinitions();
_memoryDna = new Dna();
using (MemoryStream memory2 = new MemoryStream(memDna, false))
{
using (BinaryReader reader2 = new BinaryReader(memory2))
{
_memoryDna.Init(reader2, !BitConverter.IsLittleEndian);
}
}
if (_memoryDna.NumNames != _fileDna.NumNames)
{
_flags |= FileFlags.VersionVaries;
//Console.WriteLine ("Warning, file DNA is different than built in, performance is reduced. Best to re-export file with a matching version/platform");
}
if (_memoryDna.LessThan(_fileDna))
{
//Console.WriteLine ("Warning, file DNA is newer than built in.");
}
_fileDna.InitCmpFlags(_memoryDna);
ParseData();
ResolvePointers(verboseMode);
UpdateOldPointers();
reader.Dispose();
memory.Dispose();
}
