9

1014 Chapter 9: Surface Modeling
If a vertex is isolated or used by only one face, it
is unaffected.
Tu rn ( Edge level only) —Rotates the edge w ithin
its bounding. All mesh objects in 3ds Max are
composed of triangular faces, but by default, most
polygons are depicted as quadrilaterals, with a
hidden edge dividing each quad into two tr iangles.
Turn lets you change the direction in which the
hidden e dge (or any other) runs, thus affecting
how the shape changes when you t ransform
sub-objects directly, or indirectly with a modifier.
Div ide (Face/Poly gon/E lement levels
only )—
Subdivides faces into three smaller
faces. This function applies to faces even if you’re
at the Polygon or Element sub-object level. Click
Divide,andthenselectafacetobedivided.Each
face is subdivided where you click it. You can click
as many faces as you want divided, in sequence.
To stop div iding, click Divide again to turn it off,
or right-click.
Extrude, Chamfer, and Bevel group
The Extrude controls let you extrude edges or
faces. Edge extrusion works in a fashion similar
to face extrusion. You can apply extrusion
interactively (by dragging on sub-objects) or
numerically (using spinners).
Extruded edges seen in viewpor t and rendered image
Ex tr u de (Ed ge a nd Face/Poly gon/Element l evels
only )—
Click this button and then either drag to
extrude the selected edges or faces, or adjust the
Extrude spinner to perform the extrusion. You
can select different sub-objects to extrude while
Extrude is active.
•
Ex trude A mount—This spinner (to the right of
the Extrude button) lets you specify the amount
to extrude the edge. Select one or more edges,
and then adjust the spinner.
The Chamfer controls are available only at the
Vertex and Edge sub-object levels. They let you
bevel object corners using a chamfer function. You
can apply this effect interactively (by dragg ing
vertices) or numerically (using the Chamfer
spinner).
Chamfer ( Vertex and Edge levels only)—Click t his
button, and then drag vertices or edges in the
active object. The Chamfer Amount spinner
updates to indicate the chamfer amount as you
drag.