/// <summary>
/// Initialize with no data.
/// </summary>
public G1Model()
{
Section = new ResourceSectionHeader
{
Magic = DataType.Model,
Size = -1,
Version = SupportedVersion.ToVersionA()
};
SectionRoot = new PackedResource();
}
/// <summary>
/// Parse G1M from the provided data buffer
/// </summary>
/// <param name="data"></param>
/// <param name="ignoreVersion"></param>
/// <param name="parse"></param>
public G1Model(Span <byte> data, bool ignoreVersion = true, bool parse = true)
{
if (!data.Matches(DataType.Model))
{
throw new InvalidOperationException("Not an G1M stream");
}
Section = MemoryMarshal.Read <ResourceSectionHeader>(data);
if (!ignoreVersion && Section.Version.ToVersion() != SupportedVersion)
{
throw new NotSupportedException($"G1M version {Section.Version.ToVersion()} is not supported!");
}
var header = MemoryMarshal.Read <ModelHeader>(data.Slice(0xC));
SectionRoot = new PackedResource(data.Slice(header.HeaderSize, Section.Size - header.HeaderSize), header.SectionCount);
// ReSharper disable once ForeachCanBePartlyConvertedToQueryUsingAnotherGetEnumerator
foreach (var block in SectionRoot.Sections)
{
var sectionHeader = MemoryMarshal.Read <ResourceSectionHeader>(block.Span);
var dataBlock = block.Span.Slice(SizeHelper.SizeOf <ResourceSectionHeader>());
if (!parse)
{
Sections.Add(new G1MStub(dataBlock, sectionHeader));
continue;
}
// ReSharper disable once SwitchExpressionHandlesSomeKnownEnumValuesWithExceptionInDefault
var section = sectionHeader.Magic switch
{
DataType.G1MS => (IKTGLSection) new G1MSkeleton(dataBlock, ignoreVersion, sectionHeader),
DataType.G1MF => new G1MFormat(dataBlock, ignoreVersion, sectionHeader),
DataType.G1MG => new G1MGeometry(dataBlock, ignoreVersion, sectionHeader),
DataType.G1MM => new G1MMatrix(dataBlock, ignoreVersion, sectionHeader),
DataType.EXTR => new G1Extra(dataBlock, ignoreVersion, sectionHeader),
_ => new G1MStub(dataBlock, sectionHeader)
};
Sections.Add(section);
}
}
