/// <summary>
/// Creates a <see cref="MeshModel"/> that contains only this instance as <see cref="MeshModel.Parts"/>
/// </summary>
/// <returns></returns>
public MeshModel ToMeshModel()
{
return(MeshModel.FromMeshModelPart(this));
}
/// <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);
}
