/// <summary>
/// Opens an index buffer stream on one of the mesh's index buffers.
/// </summary>
/// <param name="definition">The index buffer definition.</param>
/// <param name="baseStream">The stream open on the mesh's resource data to use as a base stream.</param>
/// <returns>The index buffer stream if successful, or <c>null</c> otherwise.</returns>
public IndexBufferStream OpenIndexBufferStream(IndexBufferDefinition definition, Stream baseStream)
{
if (definition.Data.Address.Type != CacheAddressType.Resource)
{
return(null); // Don't bother supporting non-resource addresses
}
baseStream.Position = definition.Data.Address.Offset;
return(new IndexBufferStream(baseStream));
}
/// <summary>
/// Initializes a new instance of the <see cref="MeshReader"/> class.
/// </summary>
/// <param name="version">The engine version to target.</param>
/// <param name="mesh">The mesh.</param>
/// <param name="definition">The mesh's definition data.</param>
public MeshReader(DefinitionSet version, Mesh mesh, RenderGeometryResourceDefinition definition)
{
_version = version;
Mesh = mesh;
Definition = definition;
VertexStreams = new VertexBufferDefinition[StreamCount];
IndexBuffers = new IndexBufferDefinition[IndexBufferCount];
BindVertexStreams();
BindIndexBuffers();
}
public static IndexBufferDefinition CreateIndexBuffer(int count)
{
var newIndexBuffer = new IndexBufferDefinition
{
Format = IndexBufferFormat.TriangleStrip,
Data = new TagData()
};
using (var stream = new MemoryStream())
using (var writer = new EndianWriter(stream, EndianFormat.LittleEndian))
{
for (var j = 0; j < count; j++)
{
writer.Write((short)j);
}
newIndexBuffer.Data.Data = stream.ToArray();
}
return(newIndexBuffer);
}
public static void ConvertIndexBuffer(CacheVersion inVersion, CacheVersion outVersion, IndexBufferDefinition indexBuffer)
{
using (var outputStream = new MemoryStream())
using (var inputStream = new MemoryStream(indexBuffer.Data.Data))
{
var inIndexStream = new IndexBufferStream(inputStream, CacheVersionDetection.IsLittleEndian(inVersion) ? EndianFormat.LittleEndian : EndianFormat.BigEndian);
var outIndexStream = new IndexBufferStream(outputStream, CacheVersionDetection.IsLittleEndian(outVersion) ? EndianFormat.LittleEndian : EndianFormat.BigEndian);
var indexCount = indexBuffer.Data.Data.Length / 2;
for (var j = 0; j < indexCount; j++)
{
outIndexStream.WriteIndex(inIndexStream.ReadIndex());
}
indexBuffer.Data.Data = outputStream.ToArray();
}
}
/// <summary>
/// Opens an index buffer stream on one of the mesh's index buffers.
/// </summary>
/// <param name="definition">The index buffer definition.</param>
/// <returns>The index buffer stream if successful, or <c>null</c> otherwise.</returns>
public IndexBufferStream OpenIndexBufferStream(IndexBufferDefinition definition)
{
var stream = new MemoryStream(definition.Data.Data);
return(new IndexBufferStream(stream));
}