Returns shape points of an arc shape. They can be used with xxx_extrude modules of dotSCAD. The shape points can be also used with the built-in polygon module.

## Parameters

`radius`

: The radius of the circle.`angle`

: A single value or a 2 element vector which defines the central angle. The first element of the vector is the beginning angle in degrees, and the second element is the ending angle.`width_mode`

: The default value is`"LINE_CROSS"`

. The arc line will move outward by`width / 2`

and inward by`width / 2`

. If it's`"LINE_OUTWARD"`

, The arc line moves outward by`width`

. The`"LINE_INWARD"`

moves the arc line inward by`width`

.`$fa`

,`$fs`

,`$fn`

: Check the circle module for more details.

## Examples

```
use <shape_arc.scad>;
shape_pts = shape_arc(radius = 10, angle = [-90, 90], width = 5);
polygon(shape_pts);
```

```
use <shape_arc.scad>;
use <path_extrude.scad>;
use <bezier_curve.scad>;
t_step = 0.05;
width = 2;
shape_pts = shape_arc(radius = 10, angle = [180, 360], width = 5);
p0 = [0, 0, 0];
p1 = [40, 60, 35];
p2 = [-50, 70, 45];
p3 = [20, 150, 55];
p4 = [80, 50, 60];
path_pts = bezier_curve(t_step,
[p0, p1, p2, p3, p4]
);
path_extrude(shape_pts, path_pts);
```