IndexStream Class

The base class for DirectContext3D index streams, which are used to write vertex indices into buffers.

Inheritance Hierarchy

public class IndexStream : IDisposable

The IndexStream type exposes the following members.

	Name	Description
	IsValidObject	Specifies whether the .NET object represents a valid Revit entity.

	Name	Description
	Dispose	Releases all resources used by the IndexStream
	Equals	Determines whether the specified object is equal to the current object. (Inherited from Object)
	GetHashCode	Serves as the default hash function. (Inherited from Object)
	GetType	Gets the Type of the current instance. (Inherited from Object)
	ToString	Returns a string that represents the current object. (Inherited from Object)

This base class cannot be used directly. Instead, a steam that is specific for each type of primitive (point, line, or triangle) must be used.

The process of putting vertex indices into a buffer involves using a stream-buffer pair as follows:

Map the index buffer (see IndexBuffer).
Get a stream for the appropriate primitive type from the buffer.
Add sequences of indices corresponding to primitives of the same type to the stream. The indices will be written into the buffer that was used to create the stream.
Unmap the buffer.

As an alternative to using streams, it is possible to write data into a buffer using a handle to its mapped memory.