Surface Evolver Documentation - Tutorial Surface Evolver Documentation Surface Evolver Tutorial To get started using the Surface Evolver, read the Basic Concepts section for a quick introduction, then try the examples. The basic geometric elements used to represent a surface are vertices, edges, facets, and bodies. Vertices are points in space. Edges are straight line segments joining pairs of vertices.
Facets are flat triangles bounded by three edges.
A surface is a union of facets. A body is defined by giving its bounding facets. There are no limitations on how many edges may share a vertex nor on how many facets may share an edge. Thus arbitrary topologies are possible, including the triple junctions of surfaces characteristic of soap films. Edges and facets are oriented for bookkeeping purposes, but there are no restrictions on the orientation of neighboring facets.