Figure 2 : Diagram of polar funtions of ellipse
Output of MD2002 36 19
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Keywords : Ellipse
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  • D is distance from directrix to focus.
  • Let PQ is point P to directrix and PF = point to focus.
  • The PF/PQ = e and locus of P is ellpise.
  • Then we get R = D*e/(1-e*sin(A)) which is ellipse in polar form.
  • D*e = (a - f)*(1 + e) where a - f = CU - CF as in Figure 1.
  • Ellipse : efficiency e < 1
Reference
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