Renders a triangle mesh in the 3D scene. Examples of triangle meshes includes polygons on the globe (e.g. states or countries), terrain and imagery extents, ellipses, and extrusions.

Initialize	Initializes a default triangle mesh primitive. This is equivalent to constructing a triangle mesh with a Set Hint of Frequent.
InitializeWithSetHint	Initializes a triangle mesh primitive with the specified setHint .

Triangle Mesh Primitive Overview  | Surface Mesh Primitive Overview