8

Editable Spline (Spline) 307
Subtraction—Subtracts the overlapping portion
of the second spline from the first spline, and
deletes the remainder of the second spline.
IntersectionLeaves only the overlapping
portions of the two splines, deleting the
non-overlapping portion of both.
Original splines (left), B o o lea n Union, Boolean
Subtraction, and Boolean Intersection, respectively
Mirror—Mirrors splines along the length, width, or
diagonally. Click the direction you want to mirror
first so it is active, then click Mirror.
Co pyWhen selected, copies rather than moves
thesplineasitismirrored.
About P ivot—When on, mirrors the spline
about the spline object’s pivot point (see
Pivot
(page 2–470)
). When off, m irrors the spline
about its geometric center.
Mirrored splines
Trim—Use Trim to clean up overlapping segments
in a shape so that ends meet at a single point.
To trim, you need intersecting splines. Click the
portion of the spline you want to remove. The
spline is searched in both directions along its
lengthuntilithitsanintersectingspline,and
deleted up to the intersection. If the section
intersects at two points, the entire section is
deleteduptothetwointersections.Ifthesection
is open on one end and intersects at the other , the
entire se ction is deleted up to the intersec tion and
the open end. If the section is not intersected, or
ifthesplineisclosedandonlyoneintersectionis
found, nothing happens.
Ex tendUse Extend to cle an up open segments in
a shape so that ends meet at a single point.
To extend, you need an open spline. The end of
thesplinenearestthepickedpointisextended
until it reaches an intersecting spline. If there is
no intersecting spline, nothing happens. Curved
splines extend in a direction tangent to the end of
the spline. If the end of a spline lies directly on a
boundary (an intersecting spline), then it looks for
an intersect ion further along.
Infinite B ounds—For the purposes of calculating
intersections, turn this on to t reat open splines as
infinite in length. For example, this lets you t rim
onelinearsplineagainsttheextendedlengthof
another line that it doesn’t actually intersect.
Hide—Hides selected splines. Select one or more
splines, and then click Hide.
Unhide All Displays a ny hidden sub-objects.
Delete—Deletes the selected spline.
Clo se—Closes the selected spline by joining its end
vertices with a new segment.