how to use a polybuffer without changing the polygon's shape?

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Sierra
Sierra 2022-6-29
编辑： Matt J 2022-6-30
I've used polybuffer. but when the d(distance) is a largen number, the buffer is someting like circle(round).
so I used sqaure too, but it retunred hexagon, not a rectangular even i made a polygon with 4 coordinates.
This is what i want. I want the polybuffer to be as same shape as a polygon.
Thanks.

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回答（1 个）

Matt J
Matt J 2022-6-29
use scale
  2 个评论
Sierra
Sierra 2022-6-29
I tried scale. but unfortunately the result is not what i wanted.
I want to use polybuffer like second image.
Thanks Matt J
Matt J
Matt J 2022-6-30
编辑：Matt J 2022-6-30
Ran in:
In what way is the result "not what you wanted" and what code produced that result? If you want the expansion centered around the centroid of the polyshape, specify a 3rd argument to the scale() command.
p=nsidedpoly(4);
[cx,cy]=centroid(p);
p(2)=scale(p,2,[cx,cy]);
plot(p)

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