# Anyone knows how to use getConvexHull();?

**URL:** <https://discourse.processing.org/t/anyone-knows-how-to-use-getconvexhull/8268>\
**Category:** Libraries\
**Created:** [February 10, 2019, 3:55pm UTC](https://discourse.processing.org/t/anyone-knows-how-to-use-getconvexhull/8268 "2019-02-10T15:55:43Z")\
**Posts on this page:** 1\
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**Author:** ![hamoid](https://yyz2.discourse-cdn.com/flex036/user_avatar/discourse.processing.org/hamoid/32/58_2.png) [@hamoid](https://discourse.processing.org/u/hamoid)\
**Post date:** [February 11, 2019, 2:07am UTC](https://discourse.processing.org/t/anyone-knows-how-to-use-getconvexhull/8268/2 "2019-02-11T02:07:17Z")

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Hi! If you look at the source code

> <https://github.com/atduskgreg/opencv-processing/blob/master/src/gab/opencv/Contour.java#L109>

  
it seems like the method returns a new contour but you are not using it (not even storing it in a variable).

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