November 14th, 2012

Формула мандарина

1.44 x^2 + y^2 + z^2 + \frac1{\sqrt{|\cos{5 \mathrm{arctg} \frac{z}{y}}|}} + \frac1{y^2 + z^2} + \frac3{x^2 + y^2 + z^2} = 9

ContourPlot3D[
  1.44*x^2 + y^2 + z^2 + 1/Sqrt[Abs[Cos[5*ArcTan[z/y]]]] +
    1/(y^2 + z^2) + 3/(x^2 + y^2 + z^2) == 9,
  {x, -3, 3}, {y, -3, 3}, {z, -3, 3}, Mesh -> None,
  ContourStyle -> Directive[
    Specularity[RGBColor[1, 0.8, 0], 20], Orange,
    Lighting -> {{"Directional", White, {0, 0, 4}},
      {"Ambient", Darker[White]}}]]


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