== The Geometrical Construction of the Physical Structure ==
A physical structure in [[EM.Cube]] in typically made up of a number of one or more geometric objects, which you either draw in the project workspace or import from an external CAD model file. When you start the [[EM.Cube]] application, you land in its [[CubeCAD]] module by default. [[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 and export of standard CAD formats allow for native construction of complex geometries along with the ability to fly in external CAD models with utmost ease.
All of [[EM.Cube]]'s computational modules use [[CubeCAD]] together with individually customized navigation trees as their graphical user interface and geometry definition utility. Once you have mastered the basics of [[CubeCAD]], using the other modules will be very straightforward.