Cornu-Spiral
A Euler spiral is a curve whose curvature changes linearly with its curve length (the curvature of a circular curve is equal to the reciprocal of the radius). Euler spirals are also commonly referred to as spiros, clothoids or Cornu spirals. The spiral is generated by a parametric plot of the Fresnel Integrals S(ω) against C(ω). Mathematical it is the complex sum of these two Integrals: B(ω) = C(ω) + iS(ω).
