=== Local Mesh Control Using Polymesh Objects ===
EM.Cube allows you to manually and individually mesh geometrical objects using the concept of polymesh. The Polymesh tool converts a planar surface object to a set of interconnected triangular cells, which is basically identical to its triangular surface mesh. Simply select an object and click the '''Polymesh Tool'''[[ImageFile:http://www.emagtech.com/files/images/manuals/emagware/cubecad/discretizing-objects/converting-objects-to-polymesh/polymesh_tool_tn.png]] button of '''Tools Toolbar''', or select '''Menu > Tools > Polymesh''', or use the keyboard shortcut '''P'''. You can also right click on a selected object and select '''Polymesh''' from the contextual menu. From the Polymesh Dialog, you can control the mesh resolution through the '''Edge Length''' parameter, which is expressed in project units. Note that unlike the planar mesh generator which uses a frequency-dependent mesh density to drive the mesh resolution, the ploymesh's edge length is fixed and purely geometrical and does not change with the project frequency. '''EM.Cube's mesh generator considers a polymesh object as a "final" mesh and reproduces it "As Is" during the meshing process.'''
You have access to every single node of a polymesh object and you can change its coordinates arbitrarily. You do this by opening the property dialog of a polymesh object and selecting a certain node index in the box labeled '''Active Node'''. You can also select a node by hovering the mouse over the node to highlight it and then click to select it. A red ball appears on the current active node. You can delete the nodes arbitrarily using the '''Delete''' button of the dialog, which results in lowering the mesh resolution at the location of the deleted node. Or you can insert new nodes in the faces of a polymesh object. To insert a node, first you have to select a face. Change the '''Mode''' option by selecting the '''Face''' radio button and then select the right '''Active Face''' index. A red triangular border appears around the selected face. You can also simply click on the surface of a face and select it using the mouse. With the desired face selected, click the '''Insert''' button of the dialog to create a new node at the centroid of the selected face. You can adjust the coordinates of the newly inserted node from the three X, Y and Z '''Coordinate''' boxes. Note that immediately after the insertion of a new node, the label of these coordinate boxes changes to "'''New Node'''" and they show the relative local X, Y and Z offsets with respect to the original node position. Once you close the Polymesh Dialog, the new node is added to the existing node list and can be edited later like the other polymesh nodes. By inserting a new node, you increase the mesh resolution locally and selectively.