triangles

Description

This element was used in the past to store all triangles in a 2-manifold triangulation. Since Regina 7.0, these triangles are now stored directly within the tri element (which replaces the old packet element for triangulation packets), and each triangle is encoded in a simplex element (as opposed to the triangle elements described here).

A triangles element stores the entire set of triangles forming a 2-manifold triangulation.

The total number of triangles must be specified by the ntriangles attribute. The individual triangles are numbered 0, 1, 2, etc., and their edge gluings are described by the corresponding child triangle elements. There must be precisely ntriangles child triangle elements in total.

Attributes

Example

The following XML snippet represents a triangulation of the Klein bottle with two triangles.

<triangles ntriangles="2">
  <triangle> 1 1 1 5 1 0 </triangle>
  <triangle> 0 1 0 5 0 0 </triangle>
</triangles>