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0027761: Intersection loops infinitely

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The static method CorrectSurfaceBoundaries() in the class IntTools_FaceFace,
which is used for correction of the boundaries of the faces before their intersection,
contains two inconsistent adjustments of the boundaries of the faces based on periodic surfaces.
One of these adjustments has been removed. The remaining adjustment, the one that is based on the
2D bounding boxes of the closed curves, should be sufficient.

Test case for the issue.
This commit is contained in:
emv 2016-08-11 11:55:29 +03:00 committed by mkv
parent 3e05329c4c
commit 7cb2f40993
2 changed files with 19 additions and 56 deletions
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56
src/IntTools/IntTools_FaceFace.cxx
View File

@ -2381,59 +2381,6 @@ Handle(Geom_Curve) MakeBSpline (const Handle(IntPatch_WLine)& WL,
}
}
//
{
Standard_Integer aNbP;
Standard_Real aXP, dXfact, aXmid, aX1, aX2, aTolPA;
//
aTolPA=Precision::Angular();
// U
if (isuperiodic) {
aXP=anAdaptorSurface.UPeriod();
dXfact=theumax-theumin;
if (dXfact-aTolPA>aXP) {
aXmid=0.5*(theumax+theumin);
aNbP=RealToInt(aXmid/aXP);
if (aXmid<0.) {
aNbP=aNbP-1;
}
aX1=aNbP*aXP;
if (theumin>aTolPA) {
aX1=theumin+aNbP*aXP;
}
aX2=aX1+aXP;
if (theumin<aX1) {
theumin=aX1;
}
if (theumax>aX2) {
theumax=aX2;
}
}
}
// V
if (isvperiodic) {
aXP=anAdaptorSurface.VPeriod();
dXfact=thevmax-thevmin;
if (dXfact-aTolPA>aXP) {
aXmid=0.5*(thevmax+thevmin);
aNbP=RealToInt(aXmid/aXP);
if (aXmid<0.) {
aNbP=aNbP-1;
}
aX1=aNbP*aXP;
if (thevmin>aTolPA) {
aX1=thevmin+aNbP*aXP;
}
aX2=aX1+aXP;
if (thevmin<aX1) {
thevmin=aX1;
}
if (thevmax>aX2) {
thevmax=aX2;
}
}
}
}
//
if(isuperiodic || isvperiodic) {
Standard_Boolean correct = Standard_False;
Standard_Boolean correctU = Standard_False;
@ -2488,16 +2435,13 @@ Handle(Geom_Curve) MakeBSpline (const Handle(IntPatch_WLine)& WL,
aBox.Get(umin, vmin, umax, vmax);
if(isuperiodic && correctU) {
if(theumin < umin)
theumin = umin;
if(theumax > umax) {
theumax = umax;
}
}
if(isvperiodic && correctV) {
if(thevmin < vmin)
thevmin = vmin;
if(thevmax > vmax)

19
tests/bugs/modalg_6/bug27761 Normal file
View File

@ -0,0 +1,19 @@
puts "TODO OCC27766 ALL: Error : The command is not valid. The length is 0."
puts "TODO OCC27766 ALL: Error : The length of result shape is"
puts "========"
puts "OCC27761"
puts "========"
puts ""
#################################################
# Intersection loops infinitely
#################################################
restore [locate_data_file bug27761_c1.brep] c1
restore [locate_data_file bug27761_c2.brep] c2
bsection result c1 c2
checkshape result
# approximate theoretical length of the result
checkprops result -l 0.00201518