3D Visualization and Solid Primitive Conceptual Design in AutoCAD

3D Visualization and Solid Primitive Conceptual Modeling in AutoCAD®to change the color of edge and face subobjects or the material assigned to a face. The color ofa subobject primitive can also be changed, but not the color of its subobjects.PresspullThe PRESSPULL commandallows any closed boundary to beextruded. The boundary can be a flatsurface, a closed polyline, a circle, ora region. The extrusion is alwaysapplied perpendicular to the plane ofFigure 28. The PRESSPULL command on the 3D Make Controlthe boundary, but can be in the Panelpositive or negative direction. Whenapplied to the face of a solid, it is very similar to the Extrude Face option of the SOLIDEDITcommand, though dynamic feedback is provided for the extrusion with PRESSPULL.Once the command is initiated, you are prompted to pick inside of the bounded areas toextrude. Move the pointer inside of a boundary and pick. Then, drag the boundary to a newlocation and pick or, if dynamic input is on, enter the distance to extrude the face.NoteThe entire boundary must be visible on the screen, or the loop will not be found.ShellA shell is a solid that has been“hollowed out.” The Shell option ofthe SOLIDEDIT command creates ashell of the selected object using aFigure 29. The SHELL button on the Solid Editing toolbarspecified offset distance, or thickness.To create a shell of a solid body, select the button shown in Figure 29 from the Solid Editingtoolbar. You are prompted to select the solid. Only one solid can be selected.After selecting the solid, you have the opportunity to remove faces. If you do not remove31