Re: gEDA-user: co-ordinates PCB

["richard.bown@xxxxxxxxxxxxxxxx" <richard.bown@xxxxxxxxxxxxxxxx>]

John Luciani wrote:
> The convention is Y values increase as you go down.
> 
> (* jcl *)
> 
Sorry
I must be getting a bit thick in my old age, are you saying that in the 
second quandrant, ie where the first quadrant is between 0 degrees and 
90 degs, and the second quadrant is between 90 degs and 180 degs, that y 
increases positive or negative. I'm getting very confused here, as 
co-ordinates that are negative , ie both x & y should only exist in 
quadrant 3, between 180 deg and 270 degs.

For instance if I take the center point of a component, do I forget the 
polarity of the co-ordinates and just use the magnitude of the differences ?

-- 
Best wishes

Richard Bown

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