Arguments

Description

The
draw-arc
function draws an arc contained in the rectangle from (
x y
) to (
x+width y+width
) from
start-angle
to
start-angle+sweep-angle
. Both angles are specified in radians. Currently, arcs are parts of ellipses whose major and minor axes are parallel to the screen axes. If the port has rotation in its transform, the enclosing rectangle is modified to be the external enclosing orthogonal rectangle of the rotated rectangle. The start angle is rotated. The
transform, foreground, background, operation, thickness, scale-thickness
, and
mask
from the port's graphics state (see make-graphics-state) are all used. Additionally on Unix only,
stipple, pattern
,
mask-x,
mask-y
are used. When
filled
is non-
nil
, a sector is drawn.