Bjoern Hoehrmann wrote:

> You have
> 
>   timer = setInterval((angle = rotation(angle)), 150);
> 
> Here the `(angle = rotation(angle))` will be evaluated, and then the
> setInterval function will be called with the result of the evaluation
> of the expression and `150` as arguments. If you want it to call the
> rotation(...) function repeatedly, you have to wrap the code in a 
> string or preferably a function ala
> 
>   timer = setInterval(function(){
>     (angle = rotation(angle))
>   }, 150);
> 
> I am not sure this will work right away, but it's the right approach.

Thanks very much Bjoern, that works perfectly (although I do not
understand why it needs to be done that way):

http://www.gateho.nildram.co.uk/temp/graphics/SVG/Slider_Crank_script.html

 


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