Quote from: WanderingPhilospher on Today at 02:45:45 AM

I think I have such a script.

Did you finally get yours to work?

Yes I have it on my laptop, if you need it let me know, I have evolved so much since I posted this topic.

Quote from: hexan123 on Today at 05:06:24 AM

if I want to subtract points t=j-d

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def subpoint (xj, yj, xd, yd):
   xt = (((yj*yj+2*yd*yj+yd*yd)*modinv (xd*xd-2*xd*xj+xj*xj,N2))-xd-xj)%N2
   yt = ((((yj+yd)*(xt-xd))*modinv(xd-xj,N2))+yd)%N2
   return (xt, yt)
-------------------------------------------------------------------------------------------------------------------------
modinv modulo division
N2 = 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEFFFFFC2F

But not this much evolved. Lol.