Christoph Hormann wrote:
> 
> Jan Walzer wrote:
> >
> > IIRC you have to do some integration ... don't ask me how ...
> >
> > All I can remember, was to start with the function for the path ...
> >
> >        /x\   /cos(t)*40\
> > P(t): ( y )=( sin(t)*20 )    // this should look like vectors
> >        \z/   \    0    /
> >
> > somehow you have now to integrate now for t
> > then you have to do something with this ...
> >
> 
> IIRC, integrating an elliptical curve is not possible in a mathematically
> exact way.  Not totally sure about it though.

Sure, no way. But you can try to approximate it using any numerical
integration method, even the most basic ones (split your ellipse in many
small segments...)

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