7.6

Table Of Contents

Arguments

x, y

Measure values representing the x and y coordinates respectively of the center of the circle.

arc_length

Measure value representing the length of the arc.

start_angle

Measure value representing the start angle, in degrees, for the arc. Degrees are relative to a standard X, Y axis, with a value

of 0 degrees lying flush with the X axis. The value of the start angle can be either positive or negative.

end_angle

Measure value representing the end angle, in degrees, for the arc. Degrees are relative to a standard X, Y axis, with a value of

0 degrees lying flush with the X axis. The value of the end angle can be either positive or negative.

Code Sample Examples

Example 1

Example 1 draws a 180 degree arc 3 inches in length. The center of the circle is at (0,0). The rmoveto() command that pre-

cedes the arc() command ensures the current point is set at the center of the circle and prevents a line from being drawn from

the current point to the start point of the arc.

rmoveto(3,0)

arc(0,0,3,0,180)

stroke()

Example 2

Example 2 draws an arc 2.5 inches in length. The center for the arc is four inches from the left edge of the page and three

inches from the top edge. The arc starts at 30 degrees and ends at 60 degrees. The rmoveto() command that precedes the

arc() command moves the current point to the center of the circle, resulting in a line that is drawn from the center of the circle

to the start point of the arc.

rmoveto(4,3)

arc(4,3,2.5,30,60)

stroke()

ClosePath (procedure)

Closes any open path and completes the current shape, if need be, by drawing a line from the last point in the shape to the

starting point. This ensures the shape is closed, thus enabling filling to take place if specified. Only closed shapes can be filled.

Syntax

closepath()

Argument

None