Creating a 2D mesh on a given boundary

Question

Fabrizio Bernardi 2021-10-14

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1563541-creating-a-2d-mesh-on-a-given-boundary

评论： Fabrizio Bernardi 2021-10-25

Hello, I wanted to ask how to create a triangular mesh in a delimited region. I have a vector of points x and y delimiting all the point, I constructed the region boundary using

k = boundary(x,y);

and I can see the plot of my boundary with

plot(x(k),y(k));

How do i create a triangular mesh of a specific h size covering this region?

Thanks for your help!

0 个评论
显示 -2更早的评论隐藏 -2更早的评论

请先登录，再进行评论。

请先登录，再回答此问题。

Answer 1

Pavan Guntha 2021-10-22

1
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1563541-creating-a-2d-mesh-on-a-given-boundary#answer_814128

在 MATLAB Online 中打开

Hi,

You could use 'triplot' function with an appropriate triangulation object to plot the triangular mesh. An illustration on how can we draw a triangular mesh onto a random shape is shown below:

P = rand(10,2);
K = boundary(P(:,1), P(:,2));
plot(P(K,1), P(K,2))
T = delaunayTriangulation(P);
triplot(T)

The random shape & triangular mesh are as follows:

For more information you could look at the following documentation pages:

triplot - Used to plot a 2D triangular mesh based on the input x,y co-ordinates & a triangulation object.
delaunayTriangulation - We can specify few edge constraints on how a triangulation object is to be created based on which the triangular mesh is plotted.

Hope this helps!