Triangle fan: First 3 vertices form a triangle, then each additional vertex forms another triangle fanning out from the initial vertex (the center of the fan).

Line loop: First 2 vertices form a line segment; each additional vertex forms another segment connected to the last; an implied final segment connects the last one to the first, forming a loop.

Line strip: First 2 vertices form a line segment; each additional vertex forms another segment connected to the last.

Line list: Every 2 vertices form a line segment.

Point list: Each vertex specifies a single point in space.

Triangle strip: First 3 vertices form a triangle; each additional vertex forms another triangle connected to the previous one on two sides.

Triangle list: Every 3 vertices form a triangle.