Filling in a polygon

Question

YM 2019-3-18

0
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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/450679-filling-in-a-polygon

编辑： Stephan 2019-3-18

x8=[0 5 1 2.5 5];

y8=[2 2 5 0 5];

figure(7)

plot(x8,y8)

fill(x8,y8,'Red')

I used the above in the hopes of having a (red) filled polygon. Instead, triangle sections in the corners are filled, but not the entire polygon. Any advice so as to fill the entire polygon?

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Answer 1

Stephan 2019-3-18

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https://ww2.mathworks.cn/matlabcentral/answers/450679-filling-in-a-polygon#answer_365874

编辑：Stephan 2019-3-18

Hi,

it depends on the order you enter the single points. See this:

x8=[0, 2, 2.5, 3.5, 5, 4, 5, 3, 1, 1.5];   
y8=[2, 2, 0, 2, 2, 3, 5, 3.5, 5, 3];
figure(7)
plot(x8,y8)
fill(x8,y8,'Red')

It starts at the first point P1(0,2) and goes counter-clockwise through the figure. Everytime there is a change of direction, the corresponding coordinates are entered.

Result is:

Best regards

Stephan