Take slices of the cube

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george korris 2022-4-2

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1687189-take-slices-of-the-cube

评论： george korris 2022-4-3

Hi everyone the following code creates random cubes inside a big cube:

clc;
clear all;
%y z coordinates:
vert = [1 1 -1; 
        -1 1 -1; 
        -1 1 1; 
        1 1 1; 
        -1 -1 1;
        1 -1 1; 
        1 -1 -1;
        -1 -1 -1];
%These are the 6 faces of the cube, each is defined by connecting 4 of the
%available vertices:
fac = [1 2 3 4; 
       4 3 5 6; 
       6 7 8 5; 
       1 2 8 7; 
       6 7 1 4; 
       2 3 5 8];
% I defined a new cube whose length is 1 and centers at the origin.
vert2 = vert * .05;  
fac2 = fac;
patch('Faces',fac,'Vertices',vert,'Facecolor', 'w');  % patch function for the first big cube. 
axis([-1, 1, -1, 1, -1, 1]);
axis equal;
hold on;
rng(123); %// Set seed for reproducibility
num_squares = 100; %// Set total number of squares
%// New - to store the coordinates
coords = [];
%// For remembering the colours
colors = [];
%// For each square...
for idx = 1 : num_squares
    %// Take the base cube and add an offset to each coordinate
    %// Each coordinate will range from [-1,1]
    vert_new = bsxfun(@plus, vert2, 2*rand(1,3)-1);
    %// New - For the coordinates matrix
    coords = cat(3, coords, vert_new);
    %// Generate a random colour for each cube
    color = rand(1,3);
    %// New - Save the colour
    colors = cat(1, colors, color);
    %// Draw the cube
    %patch('Faces', fac, 'Vertices', vert_new, 'FaceColor', color);
    patch('Faces', fac, 'Vertices', vert_new);
    axis off;
end
%// Post processing
material metal;
alpha('color');
alphamap('rampdown');
view(3);