9

1032 Chapter 9: Surface Modeling
• You can drag other vertices in turn to extrude
them while the Extrude button is active. Click
Extrude again or ri ght-click in the active
viewport to end the operation.
Chamfer box showing extruded vertex
Ex trude Settings—Opens the Extrude Vertices
dialog (page 1–1073),whichletsyouperform
extrusion via interactive manipulation.
If you click this button after 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 ext r usion.
Weld—Combines contiguous, selected vertices
that fall within the tolerance sp ecified in Weld
dialog (page 1–1077). All edges become connected
to the resulting single vertex.
Weld is best suited to automatically simplifying
geometry that has areas with a number of vert ices
that are very close together. Before u sing Weld,
set the Weld Threshold v ia the Weld dialog ( page
1–1077). To weld vertices that are relatively far
apart, use Ta rge t Weld instead.
Weld Settings—Opens the Weld dialo g ( page
1–1077), which lets you spe cify the weld threshold.
Chamf e r—Click this button and then drag
verticesintheactiveobject.Tochamfervertices
numerically, click the Chamfer Settings button and
use the Chamfer Amount value.
If you chamfer multiple selected vertices, all of
them are chamfered identically. If you drag an
unselected vertex, any selected vertices are first
deselected.
Each chamfered vertex is effectively replaced by
a new face tha t connects new points on all edges
leading to the origina l vertex. These new points
are exactly <chamfer amount> distance from the
original vertex along each of these edges. New
chamfer faces are created with the material ID of
one of the neighboring faces (picked at random)
and a smoothing group which is an intersection of
all neighboring smo othing 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 vertices, and a new
triangle is created at the corner.
Alternatively, you can create open space around
the chamfered vert ices; for details, see Chamfer
Vertices dialog (page 1–1070).