A triangular fan is a series of connected triangular faces. The fan differs from a IFMETriangleStrip in the way how vertices define faces. The first three vertices (denoted below by v1, v2, and v3), define the first triangular face. A new triangle is formed by connecting the next point with its immediate predecessor and the first point of the triangle fan. That is, every additional point vi defines a new triangular face with vertices v1, vi-1, and vi.
For example, the second triangle is defined by v1, v3, v4, the third by v1, v4, v5, etc. The following diagram illustrates a typical IFMETriangleFan.
Contains: None
Contained by: IFMECompositeSurface, IFMEMultiSurface