# 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:** 7

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**Author:** ![prisoner849](https://yyz1.discourse-cdn.com/flex035/user_avatar/discourse.threejs.org/prisoner849/32/535_2.png) [@prisoner849](https://discourse.threejs.org/u/prisoner849)\
**Post date:** [April 24, 2020, 7:28pm UTC](https://discourse.threejs.org/t/how-to-create-a-simple-dynamically-expanding-rectangle-geometry/14599/7 "2020-04-24T19:28:14Z")

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The principle from this topic is applicable in this case: [Cheap round-edged box (vertex shader)](https://discourse.threejs.org/t/cheap-round-edged-box-vertex-shader/8066/2)  
And it’s even simpler, as there’s no need to compute normals in shaders.

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_[View the full topic](https://discourse.threejs.org/t/how-to-create-a-simple-dynamically-expanding-rectangle-geometry/14599)._