[lulo]

Hi

I can see that the function atan(s) in openFoam can only give results in the 1st and 4th quadrant. (angles between -pi and +pi)

My angle can variate between 0 and 2pi.
Is there any function in openFoam which can give the right result?
I know in Matlab is called atan2(s) but openFoam does not recognise that.

Any idea???

Thanks

[wyldckat]

Hi Luca,

When in doubt about some detail like this, check the code documentation: http://www.openfoam.com/docs/cpp/

Here's the proof that atan2 does exist in OpenFOAM: http://foam.sourceforge.net/docs/cpp...ce.html#l00085 - AFAIK it's the standard C/C++ libraries that don't have atan2.

To use it, you might need to call it by the full path name:

value = Foam::atan2(x,y);

Instead of:

value = atan2(x,y);

This last one will most likely assume that the function is a global one, i.e. if available it would be the standard C/C++ one.

Best regards,
Bruno

[lulo]

Thanks a lot.

I was trying atan2(s) but of course it needs 2 variables atan2(x,y).

[Henning86]

in doubleScalar it is

atan (y,x)