/// <summary>
/// Creates an index buffer reader on a stream.
/// </summary>
/// <param name="reader">The reader to use. It must point to the beginning of the index buffer.</param>
/// <param name="format">The format of each index in the buffer.</param>
public IndexBufferReader(BinaryReader reader, IndexBufferFormat format)
{
_reader = reader;
_format = format;
_baseOffset = _reader.BaseStream.Position;
_indexSize = (format == IndexBufferFormat.UInt16) ? 2U : 4U;
}
public void ResetTracking()
{
PrimitiveTopology.ResetTracking();
VertexBuffers.ResetTracking();
IndexBuffer.ResetTracking();
IndexBufferFormat.ResetTracking();
// InputElements.ResetTracking(); // reset nicht hier, weil in VertexShader gesetzt
}
public void ClearState()
{
PrimitiveTopology.InitializeState();
VertexBuffers.InitializeState();
IndexBuffer.InitializeState();
IndexBufferFormat.InitializeState();
InputElements.InitializeState();
}
/// <summary>
/// Creates an index buffer stream.
/// </summary>
/// <param name="stream">The base stream to use. It must point to the beginning of the index buffer.</param>
/// <param name="format">The format of each index in the buffer.</param>
public IndexBufferStream(Stream stream, IndexBufferFormat format)
{
_stream = stream;
_reader = new BinaryReader(_stream);
_writer = new BinaryWriter(_stream);
_format = format;
_baseOffset = _stream.Position;
_indexSize = (format == IndexBufferFormat.UInt16) ? 2U : 4U;
}
/// <summary>
/// Creates an index buffer stream.
/// </summary>
/// <param name="stream">The base stream to use. It must point to the beginning of the index buffer.</param>
/// <param name="format">The format of each index in the buffer.</param>
public IndexBufferStream(Stream stream, IndexBufferFormat format)
{
_stream = stream;
_reader = new BinaryReader(_stream);
_writer = new BinaryWriter(_stream);
_format = format;
_baseOffset = _stream.Position;
_indexSize = (format == IndexBufferFormat.UInt16) ? 2U : 4U;
}
/// <summary>
/// Binds an index buffer to the current mesh.
/// </summary>
/// <param name="indices">The indices to bind.</param>
/// <param name="format">The primitive type to use.</param>
/// <exception cref="System.InvalidOperationException">Cannot bind an index buffer if no mesh is active</exception>
public void BindIndexBuffer(IEnumerable <ushort> indices, IndexBufferFormat format)
{
if (_currentMesh == null)
{
throw new InvalidOperationException("Cannot bind an index buffer if no mesh is active");
}
_currentMesh.Indices = indices.ToArray();
_currentMesh.Mesh.IndexBufferType = (PrimitiveType)Enum.Parse(typeof(PrimitiveType), format.ToString());
}
