/// <summary>
/// Extracts the <see cref="MeshModelMetadata"/> from the specified <paramref name="stream"/>.
/// </summary>
/// <remarks>
/// The stream must contain a meshmodel file which has been created with the <see cref="MeshModel.Serialize(Stream)"/> method.
/// </remarks>
public static MeshModelMetadata ExtractFromStream(Stream stream)
{
if (stream == null)
{
throw new ArgumentNullException(nameof(stream));
}
using (var zipFile = new ZipArchive(stream.CanSeek ? stream : new MemoryStream(MeshModelHelper.StreamToArray(stream)), ZipArchiveMode.Read))
using (var entryStream = zipFile.GetEntry("Metadata.xml").Open())
{
var result = ReadFrom(entryStream);
// falls Guid noch nicht Teil der Metadaten war, dann hier stabile (und hoffentlich eindeutige) Guid den Metadaten zuweisen
if (result.FileVersion < new Version(3, 1, 0, 0))
{
result.Guid = MeshModelGuidGenerator.GenerateGuids(zipFile.Entries);
}
return(result);
}
}
/// <summary>
/// Reads the data from the specified <paramref name="subFolder"/> in the specified <paramref name="zipFile"/> and deserializes the data found in it.
/// If no <paramref name="subFolder"/> is specified, the method deserializes the data in the <paramref name="zipFile"/>s root directory.
/// </summary>
public static MeshModelPart Deserialize(ZipArchive zipFile, string subFolder = "")
{
var result = new MeshModelPart(new MeshModelMetadata());
var fileVersion10 = new Version(1, 0, 0, 0);
// Metadaten lesen
using (var entryStream = zipFile.GetEntry(Path.Combine(subFolder, "Metadata.xml")).Open())
{
result.Metadata = MeshModelMetadata.ReadFrom(entryStream);
}
// Versionscheck
var fileVersion = result.Metadata.FileVersion;
if (fileVersion < fileVersion10)
{
throw new InvalidOperationException(MeshModelHelper.GetResource <MeshModel>("OldFileVersionError_Text"));
}
if (fileVersion.Major > MeshModel.MeshModelFileVersion.Major)
{
throw new InvalidOperationException(MeshModelHelper.FormatResource <MeshModel>("FileVersionError_Text", fileVersion, MeshModel.MeshModelFileVersion));
}
// Vorschaubild lesen
var thumbnailEntry = zipFile.GetEntry(Path.Combine(subFolder, "PreviewImage.png"));
if (thumbnailEntry != null)
{
using (var entryStream = thumbnailEntry.Open())
{
result._Thumbnail = MeshModelHelper.StreamToArray(entryStream);
}
}
// Triangulierungsdaten lesen
using (var binaryReader = new BinaryReader(zipFile.GetEntry(Path.Combine(subFolder, "Meshes.dat")).Open()))
{
var meshCount = binaryReader.ReadInt32();
var meshes = new List <Mesh>(meshCount);
for (var i = 0; i < meshCount; i++)
{
meshes.Add(Mesh.Read(binaryReader, i, fileVersion));
}
result.Meshes = meshes.ToArray();
}
// Edgedaten lesen
using (var binaryReader = new BinaryReader(zipFile.GetEntry(Path.Combine(subFolder, "Edges.dat")).Open()))
{
var edgeCount = binaryReader.ReadInt32();
var edges = new List <Edge>(edgeCount);
for (var i = 0; i < edgeCount; i++)
{
edges.Add(Edge.Read(binaryReader, fileVersion));
}
// we don't try to create a single-point edge
result.Edges = edges.Where(e => e.Points?.Length > 3).ToArray();
}
// Datenwerte lesen
var meshValueList = new List <MeshValueList>(result.Metadata.MeshValueEntries?.Length ?? 0);
foreach (var entry in result.Metadata.MeshValueEntries ?? new MeshValueEntry[0])
{
using (var binaryReader = new BinaryReader(zipFile.GetEntry(Path.Combine(subFolder, entry.Filename)).Open()))
{
meshValueList.Add(MeshValueList.Read(binaryReader, entry, fileVersion));
}
}
result.MeshValues = meshValueList.ToArray();
// falls Guid noch nicht Teil der Metadaten war, dann hier stabile (und hoffentlich eindeutige) Guid den Metadaten zuweisen
if (fileVersion < new Version(3, 1, 0, 0))
{
result.Metadata.Guid = MeshModelGuidGenerator.GenerateGuids(zipFile.Entries.Where(e => string.Equals(Path.GetDirectoryName(e.FullName), subFolder, StringComparison.OrdinalIgnoreCase)));
}
return(result);
}
/// <summary>
/// Deserializes a <see cref="MeshModel"/> from the specified <paramref name="stream"/>
/// </summary>
public static MeshModel Deserialize(Stream stream)
{
MeshModel result;
if (!stream.CanSeek)
{
stream = new MemoryStream(MeshModelHelper.StreamToArray(stream));
}
using (var zipFile = new ZipArchive(stream))
{
// Metadaten lesen
MeshModelMetadata metadata;
using (var entryStream = zipFile.GetEntry("Metadata.xml").Open())
{
metadata = MeshModelMetadata.ReadFrom(entryStream);
}
var partCount = metadata.PartCount;
// Versionscheck
var fileVersion = metadata.FileVersion;
if (fileVersion == null)
{
throw new InvalidOperationException(MeshModelHelper.GetResource <MeshModel>("OldFileVersionError_Text"));
}
if (fileVersion.Major > MeshModelFileVersion.Major)
{
throw new InvalidOperationException(MeshModelHelper.FormatResource <MeshModel>("FileVersionError_Text", fileVersion, MeshModelFileVersion));
}
// Vorschaubild lesen
byte[] thumbnail = null;
if (partCount != 1)
{
var entry = zipFile.GetEntry("PreviewImage.png");
if (entry != null)
{
using (var entryStream = entry.Open())
{
thumbnail = MeshModelHelper.StreamToArray(entryStream);
}
}
}
// Modelldaten laden
if (partCount == 1)
{
result = new MeshModel(MeshModelPart.Deserialize(zipFile));
}
else
{
var parts = new List <MeshModelPart>(partCount);
for (var i = 0; i < partCount; i += 1)
{
parts.Add(MeshModelPart.Deserialize(zipFile, i.ToString()));
}
result = new MeshModel(metadata, thumbnail, parts.ToArray());
// falls Guid noch nicht Teil der Metadaten war, dann hier stabile (und hoffentlich eindeutige) Guid den Metadaten zuweisen
if (fileVersion < new Version(3, 1, 0, 0))
{
metadata.Guid = MeshModelGuidGenerator.GenerateGuids(zipFile.Entries);
}
}
}
return(result);
}