# Curvature analysis unit?

**URL:** <https://discourse.mcneel.com/t/curvature-analysis-unit/37027>\
**Category:** Rhino for Windows\
**Created:** [September 20, 2016, 5:06pm UTC](https://discourse.mcneel.com/t/curvature-analysis-unit/37027 "2016-09-20T17:06:11Z")\
**Posts on this page:** 1\
**Showing post:** 20

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**Author:** ![GregArden](https://sea3.discourse-cdn.com/mcneel/user_avatar/discourse.mcneel.com/gregarden/32/9536_2.png) [@GregArden](https://discourse.mcneel.com/u/GregArden)\
**Post date:** [December 2, 2016, 7:49pm UTC](https://discourse.mcneel.com/t/curvature-analysis-unit/37027/20 "2016-12-02T19:49:16Z")

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There are actually 3 cases which must be distinguished.

1. k\>0 convex
2. k\>0 concave
3. k\<=0

where k is Gaussian curvature. So maybe display signed mean curvature as a false color but mask the entire region of k\<=0 with grey, or draw the k=0 contour on the display so that the user can distinguish the positively curved areas.

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