9

640 Chapter 8: Modifiers
5.
Adjust the Spline Surface settings and edit
the object as necessary. If you modif y the
spline object, for best results, edit at the Vertex
sub-object level, and be sure to select all vertices
at an intersection before moving them.
Inter face
Spline Surface group
TheGeometryrollout>SplineSurfacegroupis
found only in the Edit Patch modifier; it’s not
availableintheEditablePatchobject.Thegroup
becomes available when the object to which the
Edit Patch modifier is applied consists of splines.
Its controls replicate the functionality of the
Surface modifier (page 1–842).
For best results, apply the Spline Surface controls
after creating a spline cage with the CrossSection
modifier (page 1–623) or the Editable Spline
Cross Section command.Thelatterapproach
approximates the Surface Tools workflo w
(described in the Surface Modifier topic), but with
a simpler modifier stack; instead of additional
CrossSection and Surface mo difiers, the sta ck
need contain only an Editable Spline object and an
Edit Patch modifier. Alternatively, you can use the
Edit Spline modifier’s Cross Sect ion command.
Generate Sur face—Creates a patch surface
usingexistingsplinestodefinethepatchedges.
Default=on.
Threshold—Determines the overall distance that
is used to weld the vertices of the spline object.
All vertices/vectors within the threshold distance
of each other are treated as one. T hreshold uses
units set in the Units Setup dialog (page 3–848).
Default=1.0.
Note: Spline control handles are also treated as
vertices, so setting hi gh Threshold levels can
produce unexpected results.
Flip Normals—Reverses the facing direction of the
patch surface. Default=off.
Remove I nterior Patches—Removes interior faces
of an object that you would not normally see.
Thesearethefacescreatedwithinthecapsor
otherinteriorpatchesofthesametypeofaclosed
polygon. Default=on.
Use Only S elected S egs—Only seg ments selected
in the Edit Spline modifier or the editable spline
object will be used by the Surface mo difier to
create patches. Default=off.
Note: SegmentSub-Objectdoesnothavetobeleft
on in the Edit Spline modifier or editable spline
object.
Edit Poly Modifier
Create or select an object. > Modify panel > Modifier List
>Object-SpaceModifiers>EditPoly
Create or select an object. > Modifiers menu > Mesh
Editing > Edit Poly
The Edit Poly modifier provides explicit editing
tools for different sub-object levels of the selected
object: vertex, edge, border, polygon, and element.
The Edit Poly modifier includes most capabilities
of the base Editable Poly object, except for Ver tex
Color information, Subdivision Surface rollout,
Weight and Crease settings, and Subdivision
Displacement rollout. Edit Poly lets you animate
sub-object transforms and parameter changes. In
addition, because it’s a modifier, you can retain
the object creation parameters and change them
later. For detailed information about animating
with Edit Poly, see these procedures (page 1–643).
Edit Poly gives you these options:
•Transformor
Shif t +Clone the selection, as
w ith any object.
• UsetheoptionsontheEditrolloutstomodify
the selection or object. Later topics discuss