# Problem with hover on area curves

**URL:** <https://discourse.processing.org/t/problem-with-hover-on-area-curves/18120>\
**Category:** Coding Questions\
**Created:** [February 26, 2020, 2:47am UTC](https://discourse.processing.org/t/problem-with-hover-on-area-curves/18120 "2020-02-26T02:47:54Z")\
**Posts on this page:** 1\
**Showing post:** 4

<div class="post-metadata">

**Author:** ![jeremydouglass](https://yyz2.discourse-cdn.com/flex036/user_avatar/discourse.processing.org/jeremydouglass/32/20_2.png) [@jeremydouglass](https://discourse.processing.org/u/jeremydouglass)\
**Post date:** [February 29, 2020, 4:54am UTC](https://discourse.processing.org/t/problem-with-hover-on-area-curves/18120/4 "2020-02-29T04:54:36Z")

</div>

This trick is also used in other applications, like selecting complex 3D shapes. Sometimes you draw an onscreen image and an offscreen buffer to mark the color zones for checking. That is called “picking.” See for example the Picking Library [http://n.clavaud.free.fr/processing/library/picking/](http://n.clavaud.free.fr/processing/library/picking/)

---

_[View the full topic](https://discourse.processing.org/t/problem-with-hover-on-area-curves/18120)._