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Normalize S pline Modifier 747
Inter face
Unify Normals—Unifiesthenormalsofanobjectby
flipping the normals so that they all point in the
same direct ion, usually outward. This is usef ul
for restoring an object’s faces to their original
orientations. Sometimes normals of scenes that
have come into 3ds Max as part of a DWG or DXF
file are irregular, depending on the methods used
to create the scene. Use this option of the modifier
to correct them.
Flip Normals—Reverses the direction of all the
surface normals of the faces of the selected object
or objects. Default=on.
Normalize Spline Modifier
Selec t a spline object. > Modify panel > M odifier List
> Normalize Spl.
Selec t a spline object. > Mod ifiers menu > Patch/Spline
Editing > N o rmalize Spline
The spline on the left has been normalized.
The Normalize Spline modifier adds new control
points in the spline at regular interv als. Use
Normalize Spline to produce splines for motion
paths t hat require constant velocity.
Note: This feature is not animatable.
Interfa ce
Seg Length—Sets the length of the spline’s
segments, in 3ds Max units. The positions of the
original vertices are discarded, and vertices are set
to regular intervals. Segment length determines
how many control points are added: shorter
segments result in more control points, longer
segments result in fewer. Default=20.0 units.
NS ur f S el Modi fi er
Select a NURBS curve or surface object. > Modify panel
> Mod ifier List > NSurf Sel
Select a NURBS curve or surface object. > Mo difiers menu
> S election Modifiers > NURBS Sur face Select
Select a NURBS curve or surface object. > Mo difiers menu
> NURBS Editing > Sur face Select
The NSurf Sel (NURBS Surface Selection)
modifier lets you place a NURBS (page 1–1078)
sub-object selection on the modifier stack. This
letsyoumodifyonlytheselectedsub-objects.
Also, selected curve sub-objects are shape objects
that you can use as paths and motion trajectories.
If a NURBS surface object is nonrelational (page
1–1116),NSurfSelcan’tselectthesub-objectlevels
Curve, Curve CV, or Point. NURBS surfaces are
nonrelational by default. You can make t he surface
relational by turning on Relational Stack on the
object’s General rollout.