Patch : intersecting polygon regions leaving holes at intersections.

I created a function which plots a line with variable thickness along the array. I am using Patch for that. The problem is those areas which I marked with red circles. How do I get rid of those holes (white areas) and make it same color as the line?

[Benjamin Kraus]

Without seeing you code, it isn't clear to me what would be causing those white patches.

Can you share your code?

Answer 1

[Avni Agrawal]

Hi Chirag,

I understand that you are facing an issue with existing white area at the intersection while using patch function.

You can try implementing below code where there are no such holes, and the continuous line only exists.

x = [-7 0 7 -9 9 -7]; 
y = [-7 9 -7 4 4 -7]; 

hold on 
for i=1:5 
    r = randi([1 10],1);    % random line width generator
    patch([x(i) x(i+1)], [y(i) y(i+1)],'b','EdgeColor','k','FaceColor','none','LineWidth', r); 
end 
hold off 

Please refer to the patch documentation for further assistance.

https://in.mathworks.com/help/matlab/ref/patch.html

[Dyuman Joshi]

patch() is not needed here -

x = [-7 0 7 -9 9 -7]; 
y = [-7 9 -7 4 4 -7]; 

figure
hold on 
for i=1:numel(x)-1
    r = randi(10);    % random line width generator
    plot([x(i) x(i+1)], [y(i) y(i+1)],'k-','LineWidth', r); 
end 
hold off