[PD] GEM Shear / angle relationship - sinusoidal error

[Mathieu Bouchard]

On Sun, 5 Sep 2010, Jack wrote:

>> 1. [abs] just before [pow 2] is completely useless.
> Wrong, that depend : float -2 -> pow 2 doesn't give 4 but 0. So [abs]
> can be useful to get 4.

right. [pow] really sucks... however, [expr pow($f1,2)] does it 
correctly... and so does [t a a] [*].

  _______________________________________________________________________
| Mathieu Bouchard ------------------------------ Villeray, Montréal, QC