Changes

Your physical structure in EM.Ferma is typically made up of some kind of source object either in the free space or in the presence of one or more material objects. EM.Ferma's electrostatic and magnetostatic simulation engines then discretize these source and material objects and solve the Laplace or Poisson equations to find the electric or magnetic fields everywhere in the computational domain.

All the CAD geometric objects in the project workspace are organized together into object groups which share the same properties including color and electric or magnetic [[parameters]]. Once a new object group node has been created on in the navigation tree, it becomes the "Active" object group of the project workspace, which is always listed in bold letters. When you draw a new CAD geometric object such as a Box box or a Spheresphere, it its name is inserted added under the currently active surface typeobject group. There is only one object group that is active at any time. Any group can be made active by right -clicking on its name in the navigation tree and selecting the '''Activate''' item of the contextual menu. It is recommended that you first create object groups, and then draw new objects under the active surface group. However, if you start a new EM.Ferma project from scratch, and start drawing a new object without having previously defined any object groups, a new default Fixed-potential PEC object group with a fixed zero voltage is created and added to the navigation tree to hold your new CAD geometric object.