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

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Nicolas Douillet
Nicolas Douillet 2023-8-12
移动：Bruno Luong 2023-8-16
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 ?
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Bruno Luong
Bruno Luong 2023-8-13
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
Nicolas Douillet 2023-8-16
移动：Bruno Luong 2023-8-16
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.

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回答（1 个）

John D'Errico
John D'Errico 2023-8-12
Ran in:
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?
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Nicolas Douillet
Nicolas Douillet 2023-8-13
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.

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