JavaScript canvas2d object method: arc()
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The
arc() method of the JavaScript
DOM object returned
by the getContext("2d")
method applied to the HTML <canvas>
element creates a circular arc.
It
has the following syntax with the following parameters.
context.arc(x, y, r, startAngle, endAngle, counterclockwise)
|
Parameter
|
Required / Optional
|
Description
|
|
x
|
Required
|
x-coordinate or circle
centre
|
|
y
|
Required
|
y-coordinate or circle
centre
|
|
r
|
Required
|
Radius of circle
|
|
startAngle
|
Required
|
Start angle of arc in
radians from x-axis
|
|
endAngle
|
Required
|
End angle of arc in
radians from x-axis
|
|
counterclockwise
|
Optional
|
(default is false).
Boolean, if true then draw arc counterclockwise, otherwise clockwise
|
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