how to solve polygon subtract problem?

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Sierra
Sierra 2022-10-17
编辑： Matt J 2022-10-17
I subtracted green circle from blue circle. and it returned second polygog like a moon.
but what i want to plot is thrid polygon.
how to subtract polygon liks this?
Thanks

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采纳的回答

Matt J
Matt J 2022-10-17
编辑：Matt J 2022-10-17
Ran in:
but what i want to plot is thrid polygon.
Plot the original polygon overlaid on top of the crescent (moon), but make the original polygon transparent.
p1=nsidedpoly(1000);
p2=nsidedpoly(1000,'Center',[1,0]);
p3=subtract(p1,p2);
plot(p3); hold on
plot(p1,'FaceAlpha',0)

更多回答（1 个）

Matt J
Matt J 2022-10-17
编辑：Matt J 2022-10-17
Ran in:
Express the 2 regions as a polyshape vector:
p1=nsidedpoly(1000);
p2=nsidedpoly(1000,'Center',[1,0]);
p3=subtract(p1,p2);
p4=intersect(p1,p2);
pFinal=[p3,p4];
h=plot(pFinal);
h(2).FaceColor='none';

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