Apparent distance conservation in Matlab plot window while rotating 3D objects

Hey,

When you plot a 3D object in Matlab and turn it around the apparent distance to this object will change, even if you set axis equal first for instance.

As far as I know, this has always been so, and still is (though my version is 2019b, not the latest one).

Would you please know a way, an other option to set, to make them static ?

Thank you

Best,

Nicolas

Edit : by the way, do you know an option to change/tune the field of view of the camera ?

[Matt J]

Please demonstrate the problem (so we can see that it is real).

[Bruno Luong]

@Nicolas Douillet "by the way, do you know an option to change/tune the field of view of the camera ?"

https://www.mathworks.com/help/matlab/creating_plots/view-control-with-the-camera-toolbar.html

[Nicolas Douillet]

This looks useful, thank you bruno, I am going to have a look at it.

[Bruno Luong]

Turn on the cameratoobar, and the rotation with this tool might also meets your reques) of constant distance?

figure
surf(peaks(40))
cameratolbar

[Nicolas Douillet]

Ok I realized I have to be even clearer.

I am going to eplore the camera toolbar possibilities -which I didn't really know until now- and then come back here -with a relevant example if possible- if necessary. Thank you for your comments and answers.

Answer 1

[John D'Errico]

I'm confused. If you plot two things in 3-d, you change the view using the function view.

But OF COURSE things change when you rotate the axes.

x = [1;3];
y = [2;8];
z = [0;5];
plot3(x,y,z,'-o')
axis equal

% the default view
[az,el] = view

az = -37.5000

el = 30

% new figure
plot3(x,y,z,'-o')
axis equal
view(-20,-39)

And in the second, the two points appear now virtually next to each other. So you would expect the apparent distance to change, as a function of the perspective. I could have set them dead on, so the two points would be on top of each other too.

So what do you think is wrong in this?

[Nicolas Douillet]

Thank you for this answer. However this is not what I mean. I am talking abour the distance between the camera / the observer and the object.