How to get starting and ending point of mouse cursor?

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Joy 2012-8-8

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https://ww2.mathworks.cn/matlabcentral/answers/45506-how-to-get-starting-and-ending-point-of-mouse-cursor

I need to calculate the difference between the initial point and the point where the mouse cursor is while the mouse is moving. What I'm doing now is that I've calculated the rotation matrix, and all I have to do is to click the mouse at one point and move the mouse around.This action will rotate the image, at the same time, while moving the mouse. Only when I let go, the image will stay at the resulted image.

I've done something similar to http://www.mathworks.com/help/techdoc/ref/rbbox.html. But I don't want the 'finalRect=rbbox'

Does anyone know how to remove the rectangle rubberband, and the 2 current point remain the same?

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Answer 1

Walter Roberson 2012-8-8

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https://ww2.mathworks.cn/matlabcentral/answers/45506-how-to-get-starting-and-ending-point-of-mouse-cursor#answer_55656

http://www.mathworks.com/help/techdoc/ref/figure_props.html#WindowButtonMotionFcn

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Joy 2012-8-8

在 MATLAB Online 中打开

Thanks. I've looked through this. But where do I put my rotation calculation? Inside the 'WindowButtonMotionFcn'?

    point1 = get(gca,'CurrentPoint');    % button down detected
    finalRect = rbbox;                   % return figure units
    point2 = get(gca,'CurrentPoint');    % button up detected
    point1 = point1(1,1:2);              % extract x and y
    point2 = point2(1,1:2);
    r=[r(1)+(point2(1)-point1(1)) r(2)+(point2(2)-point1(2)) 0];

This is the code that I've now. Can you help me with the motion fcn? How am i going to substitute the Xdata and the Ydata from my code to the 'WindowButtonMotionFcn' example? Thanks again.

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