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

Dependencies: `rotate_p`

, `bezier_curve`

, `shape_pie`

.

## Parameters

`radius`

: The radius of two circles.`centre_dist`

: The distance between centres of two circles.`tangent_angle`

: The angle of a tangent line. It defaults to 30 degrees. See examples below.`t_step`

: It defaults to 0.1. See bezier_curve for details.`$fa`

,`$fs`

,`$fn`

: Check the circle module for more details.

## Examples

```
include <rotate_p.scad>;
include <bezier_curve.scad>;
include <shape_pie.scad>;
include <shape_glued2circles.scad>;
$fn = 36;
radius = 10;
centre_dist = 30;
shape_pts = shape_glued2circles(radius, centre_dist);
polygon(shape_pts);
```

```
include <rotate_p.scad>;
include <bezier_curve.scad>;
include <shape_pie.scad>;
include <shape_glued2circles.scad>;
$fn = 36;
radius = 10;
centre_dist = 30;
shape_pts = shape_glued2circles(radius, centre_dist);
width = centre_dist / 2 + radius;
rotate_extrude() difference() {
polygon(shape_pts);
translate([-width, -radius])
square([width, radius * 2]);
}
```

```
include <rotate_p.scad>;
include <bezier_curve.scad>;
include <shape_pie.scad>;
include <shape_glued2circles.scad>;
$fn = 36;
radius = 10;
centre_dist = 30;
shape_pts = shape_glued2circles(radius, centre_dist);
width = centre_dist + radius * 2;
rotate_extrude()
intersection() {
rotate(-90) polygon(shape_pts);
translate([radius / 2, 0])
square([radius, width], center = true);
}
```