Plot a Cube centered at the origin

Hi,

I am trying to plot a cube with side lengths a, b and c centered at the origin but am having trouble to make it work. I have tried to make several 2D plots and plot them together but it doesn't really work. I hope someone here will be able to help me.

Thank You!

Answer 1

[Star Strider]

This should get you started:

a = -pi : pi/2 : pi;                                % Define Corners
ph = pi/4;                                          % Define Angular Orientation (‘Phase’)
x = [cos(a+ph); cos(a+ph)]/cos(ph);
y = [sin(a+ph); sin(a+ph)]/sin(ph);
z = [-ones(size(a)); ones(size(a))];

figure
surf(x, y, z, 'FaceColor','g')                      % Plot Cube
hold on
patch(x', y', z', 'r')                              % Make Cube Appear Solid
hold off
axis([ -1  1    -1  1    -1  1]*1.5)
grid on

This plots the basic cube. UIse the rotate (link) function to change its orientation.

Experiment to get the result you want.

[EMMANUEL VIRATEL]

Hello startrider

I'm emmanuel, a student of Toulouse (FRANCE) Pleased can you send me a script that draw the same cube as you, but that use a plot function from MATLAB not surf fonction

i will explain you later why,

Thanks a lot for your answer

Good luck with the coronavirus

Emmanuel

Answer 2

[alejandro perez]

In the description of this video is the code of a cube which rotates, moves and grows up.

https://www.youtube.com/watch?v=LdqJpVvfoaQ&t=3s

Answer 3

[melvin mariadass]

Below is a solution to plot a cube using x,y,z coordinate using plot3d. Credit goes to Aggregate packing generator

b = 50;  %inner square of the hollow beam for casting
l = 100;

x = [0 b b 0 ] %0 10 10 breadth-10 breadth-10 10];
y = [0 l];
z = [0 0 b b ] %0 10 10 breadth-10 breadth-10 10];

m = length(x);
xr=[x x(1)];
yr1=y(1)*ones(m+1,1);
zr=[z z(1)];
plot3(xr,yr1,zr,'k');
hold on
yr2=y(2)*ones(m+1,1);
plot3(xr,yr2,zr,'k');
hold on
for i=1:1:m
plot3([x(i) x(i)],y,[z(i) z(i)],'k');    
end
hold on