Grouping Vertices

You can group vertices for a primitive in two basic ways:

• In an array that includes all vertices for the primitive in order.
• In an unordered array of vertices, accompanied by an ordered array of values, where each value is the index of a vertex in the unordered array. Primitives of this type are sometimes referred to as indexed primitives.

The DrawPrimitive architecture makes it possible to render groups of vertices that define a primitive in a single call or to render the vertices that comprise a primitive one by one. For more information, see Rendering Primitives.