isPolyClockwise

Below is a demonstration of the features of the isPolyClockwise function

Contents

clear; close all; clc;

Syntax

[L]=isPolyClockwise(V);

Description

This function uses the "signed area" of the polygon to return if its orientation is clockwise L=1 or anti-clockwise L=0.

Examples

n=25; % Number of points
t=linspace(0,2*pi,n+1)'; t=t(1:end-1); % Angles

V=[cos(t) sin(t)]; % Polygon vertices

[L]=isPolyClockwise(V)

[L]=isPolyClockwise(flipud(V))

L =

  logical

   0


L =

  logical

   1

cFigure; hold on;
plotV(V,'b.-','LineWidth',2,'MarkerSize',25)
axisGeom; view(2);
drawnow;

GIBBON www.gibboncode.org

Kevin Mattheus Moerman, [email protected]

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License: https://github.com/gibbonCode/GIBBON/blob/master/LICENSE

GIBBON: The Geometry and Image-based Bioengineering add-On. A toolbox for image segmentation, image-based modeling, meshing, and finite element analysis.

Copyright (C) 2006-2023 Kevin Mattheus Moerman and the GIBBON contributors

This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.

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Published with MATLAB® R2023a