CGAL 4.6.2 - 2D Triangulation
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cid
. cid
. Triangulation_euclidean_traits_xy_3
is a geometric traits class which allows to triangulate a terrain. This traits class is designed to build a two dimensional triangulation embedded in 3D space, i.e. a triangulated surface, such that its on the \( xy\) plane is a Delaunay triangulation. This is a usual construction for GIS terrains. Instead of really projecting the 3D points and maintaining a mapping between each point and its projection (which costs space and is error prone) the class Triangulation_euclidean_traits_xy_3
supplies geometric predicates that ignore the z
-coordinate of the points.