public static SdkMeshRawFile FromStream(Stream stream)
{
if (stream == null)
{
throw new ArgumentNullException(nameof(stream));
}
var file = new SdkMeshRawFile();
using (var reader = new BinaryReader(stream, Encoding.UTF8, true))
{
file.Header = SdkMeshRawHeader.Read(reader);
if (file.Header.Version != FileVersion)
{
throw new InvalidDataException();
}
if (stream.Position != file.Header.VertexStreamHeadersOffset)
{
throw new InvalidDataException();
}
stream.Seek(file.Header.VertexStreamHeadersOffset, SeekOrigin.Begin);
for (int i = 0; i < file.Header.NumVertexBuffers; i++)
{
SdkMeshRawVertexBufferHeader header = SdkMeshRawVertexBufferHeader.Read(reader);
file.VertexBufferHeaders.Add(header);
}
if (stream.Position != file.Header.IndexStreamHeadersOffset)
{
throw new InvalidDataException();
}
stream.Seek(file.Header.IndexStreamHeadersOffset, SeekOrigin.Begin);
for (int i = 0; i < file.Header.NumIndexBuffers; i++)
{
SdkMeshRawIndexBufferHeader header = SdkMeshRawIndexBufferHeader.Read(reader);
file.IndexBufferHeaders.Add(header);
}
if (stream.Position != file.Header.MeshDataOffset)
{
throw new InvalidDataException();
}
stream.Seek(file.Header.MeshDataOffset, SeekOrigin.Begin);
for (int i = 0; i < file.Header.NumMeshes; i++)
{
SdkMeshRawMesh mesh = SdkMeshRawMesh.Read(reader);
file.Meshes.Add(mesh);
}
if (stream.Position != file.Header.SubsetDataOffset)
{
throw new InvalidDataException();
}
stream.Seek(file.Header.SubsetDataOffset, SeekOrigin.Begin);
for (int i = 0; i < file.Header.NumTotalSubsets; i++)
{
SdkMeshRawSubset subset = SdkMeshRawSubset.Read(reader);
file.Subsets.Add(subset);
}
if (stream.Position != file.Header.FrameDataOffset)
{
throw new InvalidDataException();
}
stream.Seek(file.Header.FrameDataOffset, SeekOrigin.Begin);
for (int i = 0; i < file.Header.NumFrames; i++)
{
SdkMeshRawFrame frame = SdkMeshRawFrame.Read(reader);
file.Frames.Add(frame);
}
if (stream.Position != file.Header.MaterialDataOffset)
{
throw new InvalidDataException();
}
stream.Seek(file.Header.MaterialDataOffset, SeekOrigin.Begin);
for (int i = 0; i < file.Header.NumMaterials; i++)
{
SdkMeshRawMaterial material = SdkMeshRawMaterial.Read(reader);
file.Materials.Add(material);
}
foreach (SdkMeshRawMesh mesh in file.Meshes)
{
if (stream.Position != mesh.SubsetOffset)
{
throw new InvalidDataException();
}
stream.Seek(mesh.SubsetOffset, SeekOrigin.Begin);
for (int i = 0; i < mesh.NumSubsets; i++)
{
int index = reader.ReadInt32();
mesh.SubsetsIndices.Add(index);
}
if (stream.Position != mesh.FrameInfluenceOffset)
{
throw new InvalidDataException();
}
stream.Seek(mesh.FrameInfluenceOffset, SeekOrigin.Begin);
for (int i = 0; i < mesh.NumFrameInfluences; i++)
{
int index = reader.ReadInt32();
mesh.FrameInfluencesIndices.Add(index);
}
}
if (stream.Position != file.Header.HeaderSize + file.Header.NonBufferDataSize)
{
throw new InvalidDataException();
}
foreach (SdkMeshRawVertexBufferHeader buffer in file.VertexBufferHeaders)
{
stream.Seek(buffer.DataOffset, SeekOrigin.Begin);
byte[] bytes = reader.ReadBytes((int)buffer.SizeBytes);
file.VertexBufferBytes.Add(bytes);
}
foreach (SdkMeshRawIndexBufferHeader buffer in file.IndexBufferHeaders)
{
stream.Seek(buffer.DataOffset, SeekOrigin.Begin);
byte[] bytes = reader.ReadBytes((int)buffer.SizeBytes);
file.IndexBufferBytes.Add(bytes);
}
}
return(file);
}
