A graphics port.

A real number.

A real number.

A real number.

A real number.

A real number.

A real number.

A boolean.

General graphics port drawing arguments.

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.

LispWorks CAPI Reference Manual - 21 Dec 2009