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Index › Programming Questions & Help › OpenGL and 3D Libraries › Calculation of rotation angles for 3D rotation
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Calculation of rotation angles for 3D rotation (Read 729 times)
preeti_munot
Calculation of rotation angles for 3D rotation
Jul 4th, 2006, 7:47am  
Hi,
I have plotted a 3D cube on to the screen.
Now I need to rotate that cube on mouse drag event.
Whenever I drag the mouse, the cube should be rotated in X, Y or Z direction as per the movement.
But we have only the X and Y co-ordinates of the movement.
By what angle do I rotate in X, Y direction to give this 3D effect??
Any pointers on calculation of the angle of rotation between 2 points?
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Stephen Williams
Re: Calculation of rotation angles for 3D rotation
Reply #1 - Jul 10th, 2006, 1:28pm  
Hi

I have tried this in processing using the rotate functions but either I am missing something or the functions are not implemented optimally. This is a quick hack using code I took from Ken Perlins Java 1.1 3D Renderer (http://mrl.nyu.edu/~perlin/experiments/packing/render/index.html)


It would be nice to use the PMatrix class or better yet the rotateX, rotateY functions. Perhaps someone else can help out here.


Hack here -> http://www.fluidforms.at/en/ClickAndRotateHack.php


Tooteloo,
Stephen
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