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0027981: BRepExtrema_DistShapeShape returns not null distance on interfered shapes

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The reason of the bug is bad start points on surfaces, which are used by searching roots algorithm as start points for iteration process. Starting with these points algorithm for searching roots of set of equations cannot reach correct root. To find correct start points increasing number of sampling points is applied.
This commit is contained in:
ifv 2017-03-30 16:44:21 +03:00 committed by bugmaster
parent bc001a4030
commit 5be09a153b
2 changed files with 18 additions and 1 deletions
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2
src/Extrema/Extrema_ExtSS.cxx
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@ -106,7 +106,7 @@ void Extrema_ExtSS::Perform(const Adaptor3d_Surface& S1,
mySqDist.Clear();
Standard_Integer i;
GeomAbs_SurfaceType myS1type = S1.GetType();
Standard_Integer NbU = 10, NbV = 10;
const Standard_Integer NbU = 20, NbV = 20;
switch(myS1type) {

17
tests/bugs/modalg_6/bug27981 Normal file
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@ -0,0 +1,17 @@
puts "========"
puts "OCC27981"
puts "========"
puts ""
#################################################
# BRepExtrema_DistShapeShape returns not null distance on interfered shapes
#################################################
restore [locate_data_file bug27981_a.brep] a
restore [locate_data_file bug27981_b.brep] b
distmini dd a b
set dist [dval dd_val]
if {$dist > 1.e-7} {
puts "\nError: invalid distance.\n"
}