kicad-developers team mailing list archive

[Miguel Ángel Ajo <majopela@xxxxxxxxxx>]

And the version with default units:  

https://github.com/KiCad/kicad-python/pull/7/files

Looks quite clean to me, and yet all the precision from native units is retained, plus
we can do things like:
>> p = Point((2**31-1) * nm, (-(2**31)+1) *nm)
>> p.nm
(2147483647.0, -2146483648.0)


>>> p=Point(1,2)
>>> p.inch
(0.03937007874015748, 0.07874015748031496)

>>> p=Point(1*inch, 1*inch)
>>> p.inch
(1.0, 1.0)
>>> p.mm
(25.4, 25.4)
>>> p.nm
(25400000.0, 25400000.0)
>>> p.rotate(90, around=(0,0))
>>> p
Point(-25.4, 25.4)




Miguel Ángel Ajo


On Sunday, 25 de January de 2015 at 03:03, Miguel Ángel Ajo wrote:

> A little experiment, with the suggested * mm / * inch notation.  
>  
> https://github.com/KiCad/kicad-python/pull/6/files [1]
>  
> Look specially at the tests (last files).
>  
> Feel free to comment over the code.
>  
> If we could default to mm (my preferred) or inches, we could
> save a lot of code (specially to process by human brains
> reading python) while retaining all the precision.
>  
>  
> Best,
> Miguel Ángel Ajo
> [1] Note: 2 builds failed because I didn’t make the C++ “pcbnew” module for the tests.
>  
>  
> On Sunday, 25 de January de 2015 at 02:56, Tomasz Wlostowski wrote:
>  
> > On 25.01.2015 02:50, Miguel Ángel Ajo wrote:
> > >  
> > > I was just testing that.
> > >  
> > > Python floats (in all architectures) are double, so the 52 bit fraction (11 bit exp) is always
> > > going to hold more information that the 32bits wxPoint /wxSize can hold.
> > >  
> >  
> >  
> > Hi Miguel,
> >  
> > Sorry, I'm a C/C++ guy, so float defaults for me to 32 bits ;) Doubles
> > look ok, although the decimal part will be anyway truncated on the way
> > from Python to C++ (if we decide to keep the nm as default unit)
> >  
> > Cheers,
> > T.
> >  
> >  
> >  
>  
>  
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