> Hello to All:
>
> I have been trying to find a way to design spirals on my PC without
> success. This is for some PCB artwork.
>
> Anybody with a lead?
> Thank you
> Mathias
Mathias
You could try plotting a polar graph of a thick line.
r is radius, theta is angle, a and k is a constant, e is natural log
Spiral, Hyperbolic or Reciprocal is r*theta=a
Spiral, Logarithmic or equiangular is r=e^(a*theta)
or log r=a*theta
Spiral, parabolic (r-a)^2=4a*k*theta
You could also plot points on the radius as you rotate it every couple
of degrees and use the Fiabonacci series, the connect the dots with a
smooth curve function and thicken the line.
Checkout the CRC Standard Mathematical Tables and Formulas at the
Library.
Jim