Interactively rotating images without changing viewpoint elevation?

Question

Vlad Atanasiu 2020-9-10

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/591799-interactively-rotating-images-without-changing-viewpoint-elevation

编辑： Vlad Atanasiu 2020-9-12

I display an image on a figure and wish to rotate it interactively around the central pixel. For example, a document with text running horizontaly and vertically. When using rotate3d you usually change the viewpoint's both azimuth and elevation and the image will look as if it is displayed in 3D, you even can look at it from below. Therefore, I am looking at a method to keep elevation constant at 90°. Below is my code that doesn't work and the error message it generates.

function constrained3drotation
figure;
ax = axes;
I = imread('text.png');
imshow(I,'Parent',ax);
ax.Toolbar = [];
rotateObject = rotate3d(ax);
rotateObject.Enable = 'on';
rotateObject.ButtonDownFilter = @Constrain3dRotation;
rotateObject.UseLegacyExplorationModes = 'on';
    function Constrain3dRotation(~,event)
        event.Source.CurrentAxes.Toolbar = [];
        axesAttitude = event.Source.CurrentAxes.View;
        event.Source.CurrentAxes.View = [axesAttitude(1), 90];
        
    end
end
% Warning: An error occurred during the mode callback. 
% > In matlab.uitools.internal.uimode/modeWindowButtonDownFcn (line 100)
%   In matlab.uitools.internal.uimode/modeControl>localModeWindowButtonDownFcn (line 152)