First of all, hi everyone! I'm new here and hope that this is the right way to
post bug reports. Otherwise, please inform me how to do it.
Now, I installed octclip to find intersections between polygons and found an
odd behaviour when sections of different polygons follow the same line. Also,
Strange results are returned when a section "touches" a point in the other
polygon.
The problem is that the result in the first example should be one polygon and
that the result in the second example should be a polygon without the duplicate
point [2.4 2.4].
I thank you for updating the package or advising me if I think wrong on how the
functionality should be.
Two example codes are shown below so that you can rerun the script yourselves:
1. Sections of different polygons follow the same line:
% This is a script to generate a polygon and plot it in a figure and find
intersectionpolygons(1).p = [ 2.2 2.2; 3.4 3.4; 6.3 3.4;
5.3 2.8; 3.3 2.4];
polygons(2).p = [ 1.2 2.2; 3.4 3.4; 5.3 3.4; 5.3 2.8;
4.4 2.3; 3.3 1.7]+5;
polygons(2).p = polygons(2).p + [1*ones(size(polygons(2).p,1),1)
0*ones(size(polygons(2).p,1),1)];
plot(polygons(1).p(:,1),polygons(1).p(:,2),'*-');hold onplot(polygons(1).p([end
1],1),polygons(1).p([end 1],2),'*-');
plot(polygons(2).p(:,1),polygons(2).p(:,2),'*-.k');plot(polygons(2).p([end
1],1),polygons(2).p([end 1],2),'*:k');hold off
[X,Y,nPol,nInt,nPert] = _oc_polybool(polygons(2).p,polygons(1).p,'AND');
fprintf('runPolygonShowNonIntersecting.m\n')fprintf('Numbers of polygons found:
%i\n',nPol)
2. A section "touches" a point in the other polygon:
% This is a script to generate a polygon and plot it in a figure and find
intersection
polygons(1).p = [ 2.2 2.2; 3.4 3.4; 6.3 3.4; 5.3 2.8;
3.3 2.4];
polygons(2).p = [ 1.2 2.2; 3.4 3.4; 5.3 3.4; 5.3 2.8;
4.4 2.3; 3.3 1.7]+0.2;
polygons(2).p = polygons(2).p + [1*ones(size(polygons(2).p,1),1)
0*ones(size(polygons(2).p,1),1)];
plot(polygons(1).p(:,1),polygons(1).p(:,2),'*-');hold onplot(polygons(1).p([end
1],1),polygons(1).p([end 1],2),'*-');
plot(polygons(2).p(:,1),polygons(2).p(:,2),'*-.k');plot(polygons(2).p([end
1],1),polygons(2).p([end 1],2),'*:k');hold off
[X,Y,nPol,nInt,nPert] = _oc_polybool(polygons(2).p,polygons(1).p,'AND');
fprintf('runPolygonShowNonIntersecting.m\n')fprintf('Numbers of polygons found:
%i\n',nPol) ------------------------------------------------------------------------------
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