0033060: [Regression to 7.4.0] Mesh - Sub-precisional links provoke failure on face

Slightly increase exact resolution so to cover links with approximate length equal to resolution itself on sub-resolution differences.

diff --git a/src/BRepMesh/BRepMesh_DefaultRangeSplitter.cxx b/src/BRepMesh/BRepMesh_DefaultRangeSplitter.cxx
index a7359f8ee9f18c2228cf159ab9c670b84eeaac51..dee351928b0eb1c6f6cc01b34b71ba3bd7f97ad4 100644 (file)
--- a/src/BRepMesh/BRepMesh_DefaultRangeSplitter.cxx
+++ b/src/BRepMesh/BRepMesh_DefaultRangeSplitter.cxx
@@ -124,10 +124,12 @@ void BRepMesh_DefaultRangeSplitter::computeTolerance(
   const Standard_Real aDiffU = myRangeU.second - myRangeU.first;
   const Standard_Real aDiffV = myRangeV.second - myRangeV.first;
 
+  // Slightly increase exact resolution so to cover links with approximate 
+  // length equal to resolution itself on sub-resolution differences.
   const Standard_Real      aTolerance = BRep_Tool::Tolerance (myDFace->GetFace());
   const Adaptor3d_Surface& aSurface   = GetSurface()->Surface();
-  const Standard_Real      aResU      = aSurface.UResolution (aTolerance);
-  const Standard_Real      aResV      = aSurface.VResolution (aTolerance);
+  const Standard_Real      aResU      = aSurface.UResolution (aTolerance) * 1.1;
+  const Standard_Real      aResV      = aSurface.VResolution (aTolerance) * 1.1;
 
   const Standard_Real aDeflectionUV = 1.e-05;
   myTolerance.first  = Max(Min(aDeflectionUV, aResU), 1e-7 * aDiffU);

diff --git a/tests/bugs/mesh/bug33060 b/tests/bugs/mesh/bug33060
new file mode 100644 (file)
index 0000000..ba63924
--- /dev/null
+++ b/tests/bugs/mesh/bug33060
@@ -0,0 +1,17 @@
+puts "========"
+puts "0033060: Mesh - Sub-precisional links provoke f a i l u r e on face"
+puts "========"
+puts ""
+
+restore [locate_data_file bug33060.brep] result
+
+tclean result
+
+checkview -display result -3d -path ${imagedir}/${test_image}.png
+
+set log [tricheck result]
+if { [llength $log] != 0 } {
+  puts "Error : Invalid mesh"
+} else {
+  puts "Mesh is OK"
+}