**Packages**- OpenGL

Treats each triplet of vertices as an independent triangle. Vertices *3n-2*, *3n-1*, and *3n* define triangle *n*. *N\*3/ triangles are drawn.

Draws a connected group of triangles. One triangle is defined for each vertex presented after the first two vertices. For odd *n*, vertices *n*, *n*+1, and *n*+2 define triangle *n*. For even *n*, vertices *n*+1, *n*, and *n*+2 define triangle *n*. *N*-2 triangles are drawn.