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0023170: Bug of creating a full sphere face

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Method ElSLib::SphereVIso() is protected against creation of circle with negative radius when |V| > PI/2; now the circle on analytic continuation of sphere behind poles is returned in this case (thus always with positive or zero radius)
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abv 2012-05-24 09:51:11 +04:00 committed by bugmaster
parent 86fa64d971
commit 5554ac6852
1 changed files with 8 additions and 0 deletions
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8
src/ElSLib/ElSLib.cxx
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@ -1644,6 +1644,14 @@ gp_Circ ElSLib::SphereVIso(const gp_Ax3& Pos,
Ve.Multiply(Radius * sin(V));
axes.Translate(Ve);
Standard_Real radius = Radius * cos(V);
// #23170: if V is even slightly (e.g. by double epsilon) greater than PI/2,
// radius will become negative and constructor of gp_Circ will raise exception.
// Lets try to create correct isoline even on analytical continuation for |V| > PI/2...
if (radius < 0.)
{
axes.SetDirection (-axes.Direction());
radius = -radius;
}
gp_Circ Circ(axes,radius);
return Circ;
}