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0022523: DRAWEXE randomly crashed on smooth navigation in 3D-Viewer

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Check vector modulus to avoid possible exceptions.
This commit is contained in:
kgv 2012-03-27 11:58:50 +04:00
parent fadcea2c79
commit 476ed21f1b
1 changed files with 5 additions and 0 deletions
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5
src/NIS/NIS_View.cxx
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@ -550,6 +550,11 @@ void NIS_View::Select (const NCollection_List<gp_XY> &thePolygon,
// Compute transformation.
const gp_XYZ anXdir (gp_XYZ(anX, anY, aZ) - anEye.XYZ());
if (anXdir.Modulus() <= gp::Resolution())
{
return;
}
const gp_Ax3 anAx3 (anEye, aProj, anXdir);
gp_Trsf aTrf;
aTrf.SetTransformation (anAx3);