rotate a 3D plot and keep it the same size

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Scott
Scott 2017-9-23
评论： Joseph 2024-1-30
I'm creating a GIF from a series of 3D plots, each one rotated from the previous by changing the viewpoint. Here is a snippet that does the frame generation:
for az=0:5:355
view([az,el]);
drawnow;
frame = getframe(gcf);
im = frame2im(frame);
[imind,cm] = rgb2ind(im,256);
imwrite(imind,cm,filename,'WriteMode','append','DelayTime',dt);
end
The problem I'm having is that each frame is magnified to fill the figure window, causing the plot to change size as it rotates. Here is a link to the GIF (it is also attached).
What view settings must I change to keep the 3D surface the same apparent size as I rotate it?
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Michael Krumin
Michael Krumin 2017-11-18
Hi,
The relevant axis properties are: 'CameraTarget', 'CameraPosition', 'CameraViewAngle', and 'CameraViewAngleMode'.
If you change the 'viewing orientation' of the 3D plot using view(az, el), then the distance of the camera from your 3D object doesn't change, and you only need to set 'CameraViewAngle' to control the 'zoom'. After you set it once, then the 'CameraViewAngleMode' becomes 'manual', and the 'CameraViewAngle' doesn't change on every call to view(az, el), so no need to reset it for every frame.
Juan Diez Albar
Juan Diez Albar 2020-8-21
This piece of advice worked for me. Thank you soooooo much, Sir.

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采纳的回答

Xiaofan Fei
Xiaofan Fei 2018-6-6
axis vis3d
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Joseph
Joseph 2024-1-30
Did not work for me. I'm trying to fix the exact same issue as in the OP's gif but nothing seems to help. Very frustrating that this is the default behavior.
Joseph
Joseph 2024-1-30
Just figured it out after an hour of searching. Misunderstood what CameraViewAngle was and had it set to 0. After setting to 15 and manual it now works.

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更多回答（1 个）

KSSV
KSSV 2017-9-25
Read about axis, with this you can limit the axis. Also read about xlim, ylim and zlim with these you can set the limits of specific axes.
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Scott
Scott 2017-9-25
编辑：Scott 2017-9-25
I've tried setting XLim, YLim and ZLim. That doesn't solve the problem. Take a look at the example GIF I attached and you'll see the limits don't change as the figure is rotated. What does change is the magnification of the plot to fill the figure window. Thanks for the suggestion, though.
KSSV
KSSV 2017-9-25
Try converting your az and el to Cartesian using pol2cart and specify viewpoint by view([x y z]). With z as your desired value.

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