9

Geometry Rollout (Patch) 987
Subdivision group (Vertex, Edge, Patch, and
Element levels only )
B i nd (Vertex lev el o nl y ) —Lets you create a seamless,
gapless connection between two patch edges
that have unequal numbers of vertices. The two
patches must b elong to the same object, and the
vertex need not b e selected first. Click Bind, t hen
dragalinefromanedge-basedvertex(nota
corner vertex) to the edge you want to bind it to.
The cursor turns into a white cross w hen over a
legal edge.
Binding patch edges
To exit Bind mode, click the Bind button again, or
right-click in the active v iewport.
Tip: When connecting two patches edge-to-edge,
first line up as many p airs of vertices as possible,
and use Weld to connect them. Then use Bind to
connect the remaining vertices. Bound vertices
cannot be manipulated d irectly, a lthough their
handles can.
Note: Bind is useful for connecting patch objects
with different patch resolutions, such as a head
andaneck,withouttheneedtocreateadditional
patches in the lower-resolution object.
Unbind (V er tex level only )—Disconnects a vertex
connected to a patch with Bind. Select the vertex,
and then click Unbind.
Subdi vi de (E dge, Pa tch, and E lement level s
only )—
Subdivides the selected sub-objects.
•
Propagate—When on, extends the subdivision
to neighboring p atches. Propagating the
subdivisions along all contiguous patches
prevents patch cracks where you have attached
patches together.
Topology group
Add Tri / Add Qu ad (Edge level onl y)—Yo u c a n a d d
Tri a nd Quad patches to a ny open edge of a n
object. On closed objects such as spheres, you can
delete one or more existing patches to create open
edges, and then add new patches.
The new patches adapt to the existing geometry.
For example, when you add a patch to a curved
edge, the new patch follows that curve and
seamlessly extends it.