8

960 Chapter 9: Surface Modeling
Deleting vertices
To weld vertices:
1.
At Patch (Vertex) level, select two valid vertices
on different patches.
2. Set Weld Threshold to a value at least equal to
the distance between the selected vertices.
3. Click S elected.
The two vertices move together and join.
Welding vertices
To tr an sfor m i nter ior v er t ices:
Using program defaults, you can select only
ver t ices and vectors on the outer edge or boundar y
ofapatch.ThisdefaultisknownasAutoInterior.
In some cases, you might want to move the interior
vertices. For example, you might want to tweak a
patch’s cu rvature without having to subdivide the
patch.
•At
Patch level (p age 1–971) ,youcanchange
the default on a patch-by-patch basis by
right-clicking a patch and choosing Manual
Interior from the shortcut menu. This lets
you select and transform individual interior
vertices. These vertices appear as yellow
squares in the v iewports.
Wa rni ng: Ifyoureturnapatchtothedefault,
changes due to Manual Interior are lost.