Copyright Goodheart-Willcox Co., Inc. Chapter 9 Mesh Modeling 225 Using Gizmos A gizmo, also called a grip tool, appears when a face, edge, or vertex subobject on a mesh model is selected. This tool is used to specify how a movement, rotation, or scaling transformation is applied. A visual style other than 2D Wireframe must be current in order for the gizmo to appear. Using gizmos (grip tools) is introduced in Chapter 8 and covered in detail in Chapter 11. You can switch between the move, rotate, and scale gizmos by using the drop- down list in the Selection panel on the Mesh tab of the ribbon. You can also use the Show gizmos fl yout on the status bar. The Show gizmos fl yout does not appear on the status bar by default. Select the Gizmo option in the status bar Customization fl yout to add the Show gizmos fl yout to the status bar. When you make a subobject selection on a mesh model, the ribbon displays context-sensitive panels based on the selection. For example, if a face subobject is selected, the ribbon displays the Crease and Edit Face panels, Figure 9-13. Context- sensitive panels allow improved editing effi ciency by displaying tools commonly used for the selected item. Once the selection is canceled, the context-sensitive panels are no longer displayed. PROFESSIONAL TIP PROFESSIONAL TIP Before selecting a face, edge, or vertex to perform a move, rotate, or scale operation, set the appropriate selection fi lter and gizmo. Extrude a Face You can select a face subobject on a mesh and extrude it. Extruding a mesh face adds new features to the mesh. This creates new faces that can be edited. The MESHEXTRUDE command is used to extrude mesh faces. The command sequence to extrude a mesh face is similar to extruding to create a solid shape. The EXTRUDE command is covered in detail in Chapter 6. To extrude a face, enter the command. The command automatically turns on the face subobject fi lter. This is indicated by the Face button on the Selection panel in the Mesh tab on the ribbon. Next, pick the face subobject(s) to extrude. Finally, enter an extrusion height. In Figure 9-14, a camera is being developed as a mesh model. The MESHEXTRUDE command is used to extrude an individual face as the fi rst step in creating the lens tube. PROFESSIONAL TIP PROFESSIONAL TIP Extrude a face using the MESHEXTRUDE command instead of moving a face. This will give greater editing control over an individual face. MESHEXTRUDE Ribbon Mesh Mesh Edit Extrude Face Type MESHEXTRUDE Figure 9-13. A context-sensitive panel is only displayed when certain objects or subobjects are selected. In this case, the Crease and Edit Face panels are displayed when a face subobject is selected. Context-sensitive panels