# How to create a simple dynamically expanding rectangle geometry

**URL:** <https://discourse.threejs.org/t/how-to-create-a-simple-dynamically-expanding-rectangle-geometry/14599>\
**Category:** Questions\
**Tags:** animation, geometry\
**Created:** [April 24, 2020, 9:48am UTC](https://discourse.threejs.org/t/how-to-create-a-simple-dynamically-expanding-rectangle-geometry/14599 "2020-04-24T09:48:49Z")\
**Posts on this page:** 1\
**Showing post:** 4

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**Author:** ![subesokun](https://yyz1.discourse-cdn.com/flex035/user_avatar/discourse.threejs.org/subesokun/32/10577_2.png) [@subesokun](https://discourse.threejs.org/u/subesokun)\
**Post date:** [April 24, 2020, 2:55pm UTC](https://discourse.threejs.org/t/how-to-create-a-simple-dynamically-expanding-rectangle-geometry/14599/4 "2020-04-24T14:55:19Z")

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Ok, one more question regarding the BufferGeometry:

Basically I’ve to create a geometry that looks like the following or? Is there a simple method to generate this circle geometries? I don’t want to implement that on my own… Seems like it’s possible to merge a plane geometry with a circle geometry but in that case, I’d lose the vertex indexes (red dots) which I need for my transformation or?

![rounded-rect-wireframe](https://canada1.discourse-cdn.com/flex035/uploads/threejs/original/2X/b/bed70ff2615ecf1bff6c661c9bcd0ddf2b5ed672.png)

(sorry for the bad quality 🙈)

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