User Guide

FontLab 4
538
I n t e r p o l a t i o n
Most of the time, the align and linking commands are enough to hint most
characters, but in some cases a very different kind of command is
necessary. Look at the enlarged middle-right region of the character B in
the vertical direction:
Original outline
Resul ting outline
Without interpolation With interpolation
34
38
11
34
38
11
You can see that point 11 in the original outline in the vertical direction is
set exactly between points 34 and 38. But because these points are
connected by a double link and point 11 is not controlled it becomes too
close to point 38.
In this and similar cases you can use the interpolate command. This
command sets the position of a point in the same proportion between two
other points as it was in the original outline.
Or the intermediate point could be aligned to he grid and serve as the
starting point for a single link or another interpolation command.
This command has two base points and one affected point.
To set the interpolate command:
1. Select the interpolate tool .
2. Position the cursor over the first base point
3. Holding the mouse button down move the cursor to the interpolated
point and release the button.
4. Move the cursor to the second base point and click the left mouse
button.
In the Glyph Window the interpolate command appears as two directed
lines from the interpolated point to base points.