== Geometrical Construction of the Physical Structure ==
A physical structure in [[EM.Cube]] is typically made up of one or more geometric objects, which you either draw in its project workspace or import from an external CAD model file. In [[EM.Cube]], geometric objects are generally categorized into solids, surfaces, curves and special objects, which include points and fractal trees.
When you start the [[EM.Cube]] application, you land in its [[Building Geometrical Constructions in CubeCAD | CubeCAD]] module by default. [[Building Geometrical Constructions in CubeCAD | CubeCAD]] is a comprehensive, parametric, 3D CAD modeler along with integrated mesh generation, data processing and visualization capabilities and a powerful Python scripting environment. With the click of a few buttons, you can build complex 3D models and structures in seconds using a large variety of intuitive mouse-based object creation and transformation tools. Import of standard CAD formats allows you to fly in external CAD models with utmost ease. Imported structures can easily be augmented with
== The Material Composition of the Physical Structure ==
A physical structure in [[EM.Cube]] in made up of a number of geometric objects you either draw in the project workspace or import from an external CAD model file. In [[Building Geometrical Constructions in CubeCAD | CubeCAD]], geometric objects are simply grouped together by their color. They do not have any physical properties. However, in all of [[EM.Cube]]'s computational modules, you need to assign physical properties to each geometric object. In these modules, geometric objects are grouped together by their common physical properties as well as their color. The types of physical properties may differ in different computational modules, but they are typically related to the material properties or boundary conditions.
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