Hello @Gozde Basara
MATLAB doesn't have a built-in function to divide a patch object in smaller pieces, but you can implement a custom function to subdivide the faces of a patch object. This typically involves splitting each face into smaller faces.
Here's a sample code you can refer to
% Define a simple triangular patch
vertices = [0 0 0; 1 0 0; 0 1 0];
faces = [1 2 3];
% Create the patch object
figure;
p = patch('Vertices', vertices, 'Faces', faces, 'FaceColor', 'cyan');
% Subdivide the patch
[newVertices, newFaces] = subdivide(vertices, faces);
% Visualize the refined mesh
hold on;
patch('Vertices', newVertices, 'Faces', newFaces, 'FaceColor', 'none', 'EdgeColor', 'black');
axis equal;
% Function to subdivide each triangle into smaller triangles
function [newVertices, newFaces] = subdivide(vertices, faces)
newVertices = vertices;
newFaces = [];
for i = 1:size(faces, 1)
% Get the vertices of the current face
v1 = vertices(faces(i, 1), :);
v2 = vertices(faces(i, 2), :);
v3 = vertices(faces(i, 3), :);
% Calculate midpoints
m12 = (v1 + v2) / 2;
m23 = (v2 + v3) / 2;
m31 = (v3 + v1) / 2;
% Add new vertices
newVertices = [newVertices; m12; m23; m31];
idx = size(newVertices, 1) - 2:size(newVertices, 1);
% Create new faces
newFaces = [newFaces;
faces(i, 1), idx(1), idx(3);
idx(1), faces(i, 2), idx(2);
idx(3), idx(2), faces(i, 3);
idx(1), idx(2), idx(3)];
end
end
