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0023782: Intersection algorithm produces wrong section curves for the attached faces

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The fix is to keep the correlation between numbers of segments in U and V parametric directions (nbu and nbv).
When minimal of these numbers (f.e. nbu) is set to default minimal value (10), other (nbv) is set to Min(30, nbv*(default/nbu)). 30 is used to avoid too small segments.
Added test case bugs/modalg_5/bug23782
This commit is contained in:
emv 2013-07-12 12:23:01 +04:00
parent c1fe53c64e
commit 97acf541ac
2 changed files with 36 additions and 0 deletions
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17
src/Adaptor3d/Adaptor3d_TopolTool.cxx
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@ -976,6 +976,23 @@ void Adaptor3d_TopolTool::BSplSamplePnts(const Standard_Real theDefl,
Standard_Boolean bUuniform = Standard_False;
Standard_Boolean bVuniform = Standard_False;
//modified by NIZHNY-EMV Mon Jun 10 14:19:04 2013
if (nbsu < theNUmin || nbsv < theNVmin) {
Standard_Integer aNb;
if (nbsu < nbsv) {
aNb = (Standard_Integer)(nbsv * ((Standard_Real)theNUmin)/((Standard_Real)nbsu));
aNb = Min(aNb, 30);
bVuniform = (aNb > nbsv) ? Standard_True : bVuniform;
nbsv = bVuniform ? aNb : nbsv;
} else {
aNb = (Standard_Integer)(nbsu * ((Standard_Real)theNVmin)/((Standard_Real)nbsv));
aNb = Min(aNb, 30);
bUuniform = (aNb > nbsu) ? Standard_True : bUuniform;
nbsu = bUuniform ? aNb : nbsu;
}
}
//modified by NIZHNY-EMV Mon Jun 10 14:19:05 2013
if(nbsu < theNUmin) {
nbsu = theNUmin;
bUuniform = Standard_True;

19
tests/bugs/modalg_5/bug23782 Normal file
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@ -0,0 +1,19 @@
puts "========="
puts "OCC23782"
puts "========="
puts ""
#################################################################################
# Intersection algorithm produces wrong section curves for the attached faces
#################################################################################
restore [locate_data_file bug23782_c.brep] f
explode f
bsection result f_1 f_2
set nbsh_t 1
set nb_v_good 2
set nb_e_good 1
set 2dviewer 0