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[ 2. the stroke ]
The white shapes determine the place of the black shapes,
but the white shapes are made by the black shapes. The simplest
manifestation of the black shape is the stroke. A stroke
is the uninterrupted trace of an implement on the writing
plane. The stroke begins with the imprint of an implement.
In figure 2.1 the imprint is an ellipse. This could be, for example,
the imprint of an obliquely worn-down pencil point.
As it moves forward, the impression produces the stroke.
The extremities of this stroke are demi-ellipses. Only at the
extremities is the identity of the imprint recognizable. Other
than at the extremities, the contours of the stroke consist
of straight lines. These lines are the track of a pair of
points. Every point on the one contour has a counterpart on
the other contour. This pair of points is the counterpoint of
the stroke. The distance between the points is the size of the
counterpoint.
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