OpenGL update() function updating too fast

[wysota]

I had a quick look at your code. I really suggest you make "angle" a property and use QPropertyAnimation instead of that timer. This will give you much better control over what is going on in your program assuming you want it to do some more things than to just animate one single arm movement or if you want to make it look more realistic (e.g. by changing linear movement to non-linear one that contains some ease-in/ease-out behaviour).