| deldir | Delaunay triangulation and Dirichlet tessellation |
| divchain | Dividing chain; generic. |
| divchain.default | Dividing chain; default method. |
| divchain.deldir | Dividing chain; "deldir" method. |
| duplicatedxy | Determine duplicated points. |
| plot.deldir | Plot objects produced by deldir |
| plot.divchain | Plot a dividing chain. |
| plot.tile.list | Plot Dirchlet (Voronoi) tiles |
| plot.triang.list | Plot Delaunay triangles |
| tile.centroids | Compute centroids of Dirchlet (Voronoi) tiles |
| tile.list | Create a list of tiles in a tessellation |
| tilePerim | Calculate tile perimeters. |
| triang.list | Create a list of Delaunay triangles |
| triMat | Produce matrix of triangle vertex indices. |