How to get xyz coordinates from 3d surface?

hello every one i'm working now in texture mapping so i want to get x,y,z coordinates of a 3d object of all faces of this object but i just now to get this coordinates just for one face how i can get all coordinate of all faces this is my code

nx = 120;  % the size of the grid
  ny = 120;  % the size of the grid
 x = linspace(min(v(:,1)),max(v(:,1)),nx);
 y = linspace(min(v(:,2)),max(v(:,2)),ny);
 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
  % Number of x values in uniform grid
[X, Y] = meshgrid(x, y);            % Create meshes for xu and yu

 Z = gridtrimesh(f,v,X,Y);

where V and f are the faces and vertex

how i can get all coordinate of all faces this is my code my 3d object have 5 faces ?

Answer 1

[Hitesh]

Hi Youb,

From my understanding, the "gridtrimesh(f,v,X,Y)" fits a surface of the form “Z=F(X,Y)” to the triangular mesh defined by faces and vertices of the 3D Object. Unfortunately, it might not offer the coordinates for faces of a 3D object.

For finding the coordinates of all faces of 3D object, you can simply iterate over each face and get the corresponding vertex coordinates. Please refer to below code for getting all face coordinates of 3D object.

for i = 1:size(F, 1)
    faceVertices = F(i, :);  % Get the vertex indices for the current face
    faceCoordinates = V(faceVertices, :);  % Get the coordinates for these vertices
    fprintf('Face %d coordinates:\n', i);
    disp(faceCoordinates);
end