8

636 Chapter 8: Modifiers
• Drag vertically to specify the extent of the
extrusion, and horizontally to set the size of the
base.
• With multiple vertices selected, dragging on
any one extrudes all selected vertices equally.
• You can drag other vertices in turn to extrude
them while the Extrude button is active. Click
Extrude again or right-click in the active
viewport to end the operation.
Chamfer box showing extruded vertex
Ex trude S ettings—Opens the Extr ude Ver tices
dialog (page 1–1074)
,whichletsyouperform
extrusion via interactive manipulation.
If you click this button af ter performing a manual
extrusion, the same extrusion is performed on the
current selection as a preview and the dialog opens
w ith Extrusion Height set to the amount of the last
manual extrusion.
Weld—Combines contiguous, selected vertices
that fa ll within the tolerance specified in the
Weld
dialog (page 1–1078)
. All edges become connected
to the resulting single vertex.
Weld is best suited to automatically simplify
geometr y that has areas with several vertices in
close proximity.
Weld S ettings—Opens the Wel d d i a l o g ( p age
1–1078)
, which lets you specify the weld threshold.
Chamf e r—Click this button and then drag
vertices in the active object. To chamfer vertices
numerically, click the Chamfer Settings button and
adjust the Chamfer Amount va lue.
If you chamfer multiple selected vertices, all of
them are chamfered identically. If you drag an
unselected vertex, any selected vertices are first
unselected.
Each chamfered vertex is effectively replaced by
a new face that connects new points on all edges
leading to the original vertex. These new points
are exactly <chamfer amount> distance from the
original vertex along each of these edges. New
chamfer faces are created w ith the material ID of
one of the neighboring faces (picked at random)
and a smoothing group that is an intersection of all
neighboring smoothing groups.
Forexample,ifyouchamferonecornerofabox,
thesinglecornervertexisreplacedbyatriangular
face whose vertices move along the three edges
that led to the corner. Outside faces are rearranged
and split to use these three new vert ices, and a
triangle is created at the corner.
Alternatively, you can create open space
around the chamfered vertices; for details, see
Chamfer Vertices dialog (page 1–1071) .