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===The Variety of EM.Cube's Native Object Types===

In [[EM.Cube]], objects are generally categorized into four types: solids, surfaces, curves and special objects.  *Curves are one-dimensional objects, whose length can be measured. The simplest curve object is a (straight) line. *Surfaces are two-dimensional objects whose surface area can be measured. A surface is usually characterized by a number of edges that enclose the object's area. The edges meet at vertices or nodes. The simplest surface object is a rectangle strip, which has four edges and four vertices. *Solids are three-dimensional objects whose volume can be measured. A solid is usually characterized by a number of faces that enclose the object's volume. Faces meet at edges and edges meet at vertices or nodes. The simplest solid object is a box, which has six faces, twelve edges and eight vertices. *[[EM.Cube]] currently offers two special object types: point and fractal tree. A Point is a dimensionless object that is represented by a set of coordinates (X,Y,Z). A fractal tree is a group of recursively scaled self-similar objects.  In addition to the standard geometric object types, there are generic curve objects, generic surface objects and generic solid objects. Most external CAD objects are imported as objects of the generic type.