Random lines confined in a 3d box

Hi everyone I am trying to write a code that makes random lines confined in a 3d box but i cant figure it out.

I changed a code i found in the forum for the 2d case but it doesnt work with my changes.

figure;

axes('XLim', [-0.1, 1.1], 'YLim', [-0.1, 1.1], 'ZLim', [-0.1, 1.1]);
nLine = 100;
Coor = [0, 1, 1, 0, 0; ...
        0, 0, 1, 1, 0];
for k = 1:nLine
    edge1 = randi(4);
    edge2 = randi(4);
    edge3 = randi(4);
    P1    = Coor(:, edge1) + rand * (Coor(:, edge1 + 1) - Coor(:, edge1));
    P2    = Coor(:, edge2) + rand * (Coor(:, edge2 + 1) - Coor(:, edge2));
    P3    = Coor(:, edge3) + rand * (Coor(:, edge3 + 1) - Coor(:, edge3));
    line([P1(1), P2(1), P3(1)], [P1(2), P2(2), P3(2)], [P1(3), P2(3), P3(3)]);
end

[Jan]

"doesn't work" is too vague to understand, what the problem is and what you want to achieve instead.

Answer 1

[Jan]

figure;
axes('XLim', [-0.1, 1.1], 'YLim', [-0.1, 1.1], 'ZLim', [-0.1, 1.1]);
hold('on');
view(3)
nLine = 100;
% A cube has 8 corners, but maybe you want 12 edges?
Coor = [0, 0, 0, 0, 1, 1, 1, 1; ...
        0, 0, 1, 1, 0, 0, 1, 1; ...
        0, 1, 0, 1, 0, 1, 0, 1];
for k = 1:nLine
    edge1 = randi(7);
    edge2 = randi(7);
    edge3 = randi(7);
    P1    = Coor(:, edge1) + rand * (Coor(:, edge1 + 1) - Coor(:, edge1));
    P2    = Coor(:, edge2) + rand * (Coor(:, edge2 + 1) - Coor(:, edge2));
    P3    = Coor(:, edge3) + rand * (Coor(:, edge3 + 1) - Coor(:, edge3));
    line([P1(1), P2(1), P3(1)], [P1(2), P2(2), P3(2)], [P1(3), P2(3), P3(3)]);
end

[george korris]

@Jan thank you!!!