172 Macintosh
User's
Handbook
cross hairs as they are dragged across the drawing surface. Try
to
draw
the
body
for the
thermos
on the picnic table. Undo the
drawing
or
erase any mistakes.
The rounded rectangle
is
not a
part
of
the diagram. How-
ever,
we
can easily experiment with it without damaging the
picture. Choose the rounded rectangle option,
and
move the
cross hairs
to
a clear area
on
the surface. As you
draw
the
image, notice
that
the cross hairs
do
not
coincide with the
corner
of
the box. This
is
because the image appears within
an
imaginary rectangle extending from the origin
to
the cross
hairs. The image
is
not squared, so it appears to not coincide.
This
can
result in problems when attempting
to
center one
image within
another
or
when
attempting
to
achieve
exact
positioning.
The ellipse operates as
do
the previous two shapes. Select
this
option
and
draw
the sun over the hill. Notice the much
increased problem with the coincidence
of
the cross hairs with
the image. This can cause many positional problems.
One solution
to
the problem might be to draw a reference
rectangle for the ellipse. Erase the sun
and
draw a long ellipse in
the empty space as shown in figure 6.8.
Now try
to
draw
a different ellipse within the first.
It
should be as wide
but
shorter
than
the first ellipse.
It
should
touch the edges
of
the first one
at
the middle much like a eat's
eye turned on its side. This example illustrates the difficulty
of
precise placement. Your results may have been similar to those
depicted in figure 6.9.
You may have successfully
drawn
the ellipse on your first
or
second attempt,
but
doing so requires a keen eye
and
a bit
of
·
luck.
To Next Page
Loading...
