[PD] GEM Shear / angle relationship - sinusoidal error

[Jack]

Le dimanche 05 septembre 2010 à 13:27 -0400, Mathieu Bouchard a écrit :
> On Wed, 1 Sep 2010, Ed Kelly wrote:
> 
> > But, I have noticed a sinusoidal error with the graphics in my patch. 
> > So, here is the real thing!
> 
> 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.
I can' open the .rar archive of Ed, therefore i can't test to see if you
get negative value.
++

Jack

 
> 
> 2. using pow(opposite/hypotenuse,2) as an angle to [tan] doesn't make any
>     sense whatsoever.
> 
> 3. what you need there is just opposite/adjacent, no square, no tan.
>     the opposite/adjacent is already the tangent of an angle, and you don't
>     need make that angle explicit at all.
> 
> 4. even if you just compute that ratio with [/] and [swap], there is still
>     a sign error in half of the cases (do you know how to fix this ?).
> 
> 5. why do you need to shear two rectangles, instead of shearing a single,
>     longer one ?
> 
>   _______________________________________________________________________
> | Mathieu Bouchard ------------------------------ Villeray, Montréal, QC
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