Returns the orientation and signed area of a 2D polygon
Syntax:
[ORIENT,SAREA] = POLYORIENT(X,Y)
Inputs:
X, Y Vectors with the polygon vertices
Outputs:
ORIENT Polygon orientation. 1 if the orientation is counter-clockwise (direct), 0 otherwise
SAREA Signed area of the polygon, negative if orientation is not direct
Examples:
x1 = [0 0 1 1]; y1 = [1 2 2 1];
x2 = [0 0 1 1]; y2 = [1 0 0 1];
x3 = [x1 x2]; y3 = [y1 y2];
[o1,a1] = polyorient(x1,y1) % 0, -1
[o2,a2] = polyorient(x2,y2) % 1, 1
[o3,a3] = polyorient(x3,y3) % 0, 0
引用
M MA (2024). polyorient (https://www.mathworks.com/matlabcentral/fileexchange/10823-polyorient), MATLAB Central File Exchange. 取得済み .
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