Returns shape points of a rounded square or rectangle. They can be used with xxx_extrude modules of dotSCAD. The shape points can be also used with the built-in polygon module.

## Parameters

`size`

: Accepts single value, square with both sides this length. It also accepts 2 value array`[x, y]`

, rectangle with dimensions`x`

and`y`

.`corner_r`

: The corner is one-quarter of a circle (quadrant). The`corner_r`

parameter determines the circle radius.`$fa`

,`$fs`

,`$fn`

: Used to control the four quadrants. Check the circle module for more details. The final fragments of a circle will be a multiple of 4 to fit edges.

## Examples

```
use <shape_square.scad>;
polygon(
shape_square(size = 50, corner_r = 5)
);
```

```
use <shape_square.scad>;
use <ring_extrude.scad>;
$fn = 36;
shape_pts = shape_square(
size = [20, 10],
corner_r = 2
);
ring_extrude(
shape_pts,
radius = 50, angle = 180, twist = 180, scale = 2
);
```