MATLAB: Check points inside n number of triangle in a square

matlab coder

Hello

In a square geometry n number of triangles and coordinates of each vertices are given.If N no. of points are in the medium then how to write for loop to check how many points are inside each of the triangle. Please help.

Best Answer

see pointLocation method of Triangulation class

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MATLAB: Triangle centroid

Just average all the coordinates. For example, if you have a vector containing x coordinates and a vector containing y coordinates, you can find it in the following manner.

x = rand(3,1); % x-coordinate
y = rand(3,1); % y-coordinate
x_centroid = mean(x);
y_centroid = mean(y);

MATLAB: Divide square faces into triangles

If the vertices of the squares are all pre-ordered in counter-clockwise or clock-wise order, I think you could just do,

Triangulation=[ Faces(:,[1,2,3])  ;  Faces(:,[3,4,1])] ;

If the vertices are not pre-ordered, it wouldn't be too difficult to loop through and sort them first.

Best Answer

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MATLAB: Triangle centroid

MATLAB: Divide square faces into triangles

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