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added doc for circual_sector

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Justin Lin 2017-03-12 19:33:38 +08:00
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# circular_sector
Create a circular sector. You can pass a 2 element vector to define the central angle.
## Parameters
`radius` : The radius of the circle.
`angles` : A 2 element vector which defines the central angle. The first element of the vector is the beginning angle, and the second element is the ending angle.
`fn` : The `$fn` value used by the `circle` module internally. The default value is 24.
## Examples
circular_sector(radius = 20, angles = [-50, -150]);
translate([-15, 0, 0]) circular_sector(radius = 20, angles = [45, 135]);
translate([15, 0, 0]) circular_sector(radius = 20, angles = [45, 135], fn = 12);
![circular_sector](images/lib-circular_sector-1.JPG)