– 27 –
1. In order to input the smooth shape of spline
ordinary sewing, the neat curve can be
obtained when selecting the input point
following the procedure below.
1) Select the top of input curve as the input
point. (
5
and
9
)
2) Making the points selected in step 1)
the center, select the points which are
separated a little before and after the
points in step 1). (
4
,
6
,
8
, and
!0
)
3) Further, select the center of the section
having loose bulge as the input points. (
3
,
7
, and
!1
)
4) Select the points near both ends and the
last point as the input points. (
2
,
!2
, and
!3
)
2. Ellipse can be inputted using the spline
ordinary sewing.
1) Take the joint of the curve at the gentle
section of the curve.
2) Take the input points so as to be
symmetrical if possible.
Input the input points selected by the steps above
in order. Also, be careful of the points below.
• Take rather many input points at the sharp
curve and rather few ones at the gentle
curve.
• Take 3 input points per curve at least.
2
5
1
3
4
7
8
9
!0
!3
!2
6
!1
