Identify convex and concave parts of polygon

c = convex([x,y]) c = 1 where the polygon curves toward the interior c = -1 where the polygon curves outwards
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Updated 18 Nov 2021

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This function can be used to identify convex and concave parts of a polygon, such as the airfoil profile in the figure.
Thanks to Luigi Ventre who posed the problem in a comment to File Exchange entry Curvature of a 1D curve in a 2D or 3D space.

Cite As

Are Mjaavatten (2024). Identify convex and concave parts of polygon (https://www.mathworks.com/matlabcentral/fileexchange/102169-identify-convex-and-concave-parts-of-polygon), MATLAB Central File Exchange. Retrieved .

MATLAB Release Compatibility
Created with R2021b
Compatible with any release
Platform Compatibility
Windows macOS Linux

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Version Published Release Notes
1.0.3

Corrected another bug in convex_demo

1.0.2

Fixed bug in convex_demo.m

1.0.1

Added demo file

1.0.0