Can I have round corners with PATCH?

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Kevin
Kevin 2022-3-22
评论： Les Beckham 2022-3-22
I use the following to create a rectangular box using PATCH,
patch([7 7 5 5], [5 7 7 5], 'r')
axis([0 10 0 10])
I want round corners. I have tried the property LineJoin but it does not do anything.
h.LineJoin = 'round';
So is this possible?

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采纳的回答

Matt J
Matt J 2022-3-22
编辑：Matt J 2022-3-22
Ran in:
You can with polyshape,
h=polybuffer( polyshape([7 7 5 5], [5 7 7 5]),0.5);
plot(h,'FaceColor','r', 'FaceAlpha',0.5)

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Les Beckham
Les Beckham 2022-3-22
编辑：Les Beckham 2022-3-22
Ran in:
Try this. Adjust the 'curvature' value to adjust the ratio of the round corners to the size of the rectangle (1.0 will result in a circle).
rectangle('position', [5 5 2 2], 'curvature', 0.2, 'facecolor', 'r')
axis equal
axis([0 10 0 10])
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Kevin
Kevin 2022-3-22
I see. But the forth element is not mentioned in the DOC.
I am hoping that this is not an undocumented feature and it may get removed in the future.
But thanks for mentioning this. I have learnt something new today. Great.
Les Beckham
Les Beckham 2022-3-22
You are welcome.
I did too! I wasn't aware of polyshape or polybuffer. Apparently those were added during the several years that I didn't have a copy of Matlab.

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