diff --git a/src/Contap/Contap_Contour.cxx b/src/Contap/Contap_Contour.cxx
index 22cdbe0387..34c457deeb 100644
--- a/src/Contap/Contap_Contour.cxx
+++ b/src/Contap/Contap_Contour.cxx
@@ -468,7 +468,6 @@ static void KeepInsidePoints(const Contap_TheSearchInside& solins,
{
Standard_Integer Nba = solrst.NbSegments();
- if (Nba <= 0) return;
Standard_Integer Nbp,indp,inda;
Standard_Real U,V,paramproj;
gp_Pnt2d toproj,Ptproj;
diff --git a/src/HLRBRep/HLRBRep_Surface.cxx b/src/HLRBRep/HLRBRep_Surface.cxx
index a1bff019ae..a23229edee 100644
--- a/src/HLRBRep/HLRBRep_Surface.cxx
+++ b/src/HLRBRep/HLRBRep_Surface.cxx
@@ -49,7 +49,8 @@ HLRBRep_Surface::HLRBRep_Surface ()
void HLRBRep_Surface::Surface (const TopoDS_Face& F)
{
- mySurf.Initialize(F,Standard_False);
+ //mySurf.Initialize(F,Standard_False);
+ mySurf.Initialize(F,Standard_True);
GeomAbs_SurfaceType typ = HLRBRep_BSurfaceTool::GetType(mySurf);
switch (typ) {
diff --git a/tests/bugs/modalg_6/bug25908 b/tests/bugs/modalg_6/bug25908
index 9adc038081..c39131f747 100755
--- a/tests/bugs/modalg_6/bug25908
+++ b/tests/bugs/modalg_6/bug25908
@@ -20,15 +20,15 @@ compound vl v1l vnl vol vil result
set nbshapes_expected "
Number of shapes in shape
- VERTEX : 93
- EDGE : 47
+ VERTEX : 103
+ EDGE : 52
WIRE : 0
FACE : 0
SHELL : 0
SOLID : 0
COMPSOLID : 0
COMPOUND : 1
- SHAPE : 141
+ SHAPE : 156
"
checknbshapes result -ref ${nbshapes_expected} -t -m "HLRToShape"
diff --git a/tests/bugs/modalg_6/bug27341_301 b/tests/bugs/modalg_6/bug27341_301
index 5c48031e79..a278496272 100644
--- a/tests/bugs/modalg_6/bug27341_301
+++ b/tests/bugs/modalg_6/bug27341_301
@@ -23,6 +23,6 @@ build3d result
fit
checkprops result -l 1030.62
-checknbshapes result -vertex 236 -edge 119
+checknbshapes result -vertex 258 -edge 130
checkview -screenshot -2d -path ${imagedir}/${test_image}.png
diff --git a/tests/bugs/modalg_6/bug27341_304 b/tests/bugs/modalg_6/bug27341_304
index 0eb1c3b8c7..64ef386f5d 100644
--- a/tests/bugs/modalg_6/bug27341_304
+++ b/tests/bugs/modalg_6/bug27341_304
@@ -23,6 +23,6 @@ build3d result
fit
checkprops result -l 2867.9
-checknbshapes result -vertex 1365 -edge 684
+checknbshapes result -vertex 1375 -edge 689
checkview -screenshot -2d -path ${imagedir}/${test_image}.png
diff --git a/tests/bugs/modalg_6/bug27341_306 b/tests/bugs/modalg_6/bug27341_306
index 96e3667eeb..7698f2a1fc 100644
--- a/tests/bugs/modalg_6/bug27341_306
+++ b/tests/bugs/modalg_6/bug27341_306
@@ -23,6 +23,6 @@ build3d result
fit
checkprops result -l 2893.98
-checknbshapes result -vertex 697 -edge 349
+checknbshapes result -vertex 705 -edge 353
checkview -screenshot -2d -path ${imagedir}/${test_image}.png
diff --git a/tests/bugs/modalg_6/bug27341_307 b/tests/bugs/modalg_6/bug27341_307
index 9981db4839..1ca4fedeec 100644
--- a/tests/bugs/modalg_6/bug27341_307
+++ b/tests/bugs/modalg_6/bug27341_307
@@ -23,6 +23,6 @@ build3d result
fit
checkprops result -l 2282.11
-checknbshapes result -vertex 943 -edge 474
+checknbshapes result -vertex 947 -edge 476
checkview -screenshot -2d -path ${imagedir}/${test_image}.png
diff --git a/tests/bugs/modalg_6/bug27341_308 b/tests/bugs/modalg_6/bug27341_308
index 86251a4488..b8e0622a22 100644
--- a/tests/bugs/modalg_6/bug27341_308
+++ b/tests/bugs/modalg_6/bug27341_308
@@ -22,7 +22,7 @@ build3d result
fit
-checkprops result -l 1169.48
-checknbshapes result -vertex 482 -edge 241
+checkprops result -l 1249.94
+checknbshapes result -vertex 490 -edge 245
checkview -screenshot -2d -path ${imagedir}/${test_image}.png
diff --git a/tests/bugs/modalg_6/bug27341_312 b/tests/bugs/modalg_6/bug27341_312
index 6fe0f0822a..326496810a 100644
--- a/tests/bugs/modalg_6/bug27341_312
+++ b/tests/bugs/modalg_6/bug27341_312
@@ -22,7 +22,7 @@ build3d result
fit
-checkprops result -l 520.703
-checknbshapes result -vertex 306 -edge 153
+checkprops result -l 534.882
+checknbshapes result -vertex 310 -edge 155
checkview -screenshot -2d -path ${imagedir}/${test_image}.png
diff --git a/tests/bugs/modalg_6/bug27341_313 b/tests/bugs/modalg_6/bug27341_313
index f4f64f6709..a947ba4138 100644
--- a/tests/bugs/modalg_6/bug27341_313
+++ b/tests/bugs/modalg_6/bug27341_313
@@ -23,6 +23,6 @@ build3d result
fit
checkprops result -l 9662.5
-checknbshapes result -vertex 4417 -edge 2215
+checknbshapes result -vertex 4429 -edge 2221
checkview -screenshot -2d -path ${imagedir}/${test_image}.png
diff --git a/tests/bugs/modalg_6/bug27341_314 b/tests/bugs/modalg_6/bug27341_314
index 202779d415..7ee0eb73bd 100644
--- a/tests/bugs/modalg_6/bug27341_314
+++ b/tests/bugs/modalg_6/bug27341_314
@@ -22,7 +22,7 @@ build3d result
fit
-checkprops result -l 5910.01
-checknbshapes result -vertex 1406 -edge 703
+checkprops result -l 6141.2
+checknbshapes result -vertex 1444 -edge 722
checkview -screenshot -2d -path ${imagedir}/${test_image}.png
diff --git a/tests/bugs/modalg_6/bug27341_315 b/tests/bugs/modalg_6/bug27341_315
index e2e8168620..b136ae773b 100644
--- a/tests/bugs/modalg_6/bug27341_315
+++ b/tests/bugs/modalg_6/bug27341_315
@@ -22,7 +22,7 @@ build3d result
fit
-checkprops result -l 5219.21
-checknbshapes result -vertex 1692 -edge 848
+checkprops result -l 5282.13
+checknbshapes result -vertex 1702 -edge 853
checkview -screenshot -2d -path ${imagedir}/${test_image}.png
diff --git a/tests/bugs/modalg_6/bug27341_316 b/tests/bugs/modalg_6/bug27341_316
index b6fdfd2cfe..d6b6ba4a35 100644
--- a/tests/bugs/modalg_6/bug27341_316
+++ b/tests/bugs/modalg_6/bug27341_316
@@ -22,7 +22,7 @@ build3d result
fit
-checkprops result -l 1764.64
-checknbshapes result -vertex 345 -edge 173
+checkprops result -l 1794.57
+checknbshapes result -vertex 349 -edge 175
checkview -screenshot -2d -path ${imagedir}/${test_image}.png
diff --git a/tests/bugs/modalg_6/bug27341_317 b/tests/bugs/modalg_6/bug27341_317
index ba824f05ee..cfa5701fd7 100644
--- a/tests/bugs/modalg_6/bug27341_317
+++ b/tests/bugs/modalg_6/bug27341_317
@@ -22,7 +22,7 @@ build3d result
fit
-checkprops result -l 2619.72
-checknbshapes result -vertex 578 -edge 289
+checkprops result -l 2774.53
+checknbshapes result -vertex 614 -edge 307
checkview -screenshot -2d -path ${imagedir}/${test_image}.png
diff --git a/tests/bugs/modalg_6/bug27341_318 b/tests/bugs/modalg_6/bug27341_318
index 9aa7a7c3bd..cff1cef543 100644
--- a/tests/bugs/modalg_6/bug27341_318
+++ b/tests/bugs/modalg_6/bug27341_318
@@ -23,6 +23,6 @@ build3d result
fit
checkprops result -l 2429.7
-checknbshapes result -vertex 379 -edge 190
+checknbshapes result -vertex 381 -edge 191
checkview -screenshot -2d -path ${imagedir}/${test_image}.png
diff --git a/tests/bugs/modalg_6/bug27341_320 b/tests/bugs/modalg_6/bug27341_320
index 6f2b240d02..01beeddc94 100644
--- a/tests/bugs/modalg_6/bug27341_320
+++ b/tests/bugs/modalg_6/bug27341_320
@@ -23,6 +23,6 @@ build3d result
fit
checkprops result -l 1726.77
-checknbshapes result -vertex 801 -edge 401
+checknbshapes result -vertex 811 -edge 406
checkview -screenshot -2d -path ${imagedir}/${test_image}.png
diff --git a/tests/bugs/modalg_6/bug27341_322 b/tests/bugs/modalg_6/bug27341_322
index 51cd0119c9..b15b8259f2 100644
--- a/tests/bugs/modalg_6/bug27341_322
+++ b/tests/bugs/modalg_6/bug27341_322
@@ -23,6 +23,6 @@ build3d result
fit
checkprops result -l 6584.94
-checknbshapes result -vertex 774 -edge 387
+checknbshapes result -vertex 784 -edge 392
checkview -screenshot -2d -path ${imagedir}/${test_image}.png
diff --git a/tests/bugs/modalg_6/bug27341_324 b/tests/bugs/modalg_6/bug27341_324
index dad9044f34..cfd3304ab5 100644
--- a/tests/bugs/modalg_6/bug27341_324
+++ b/tests/bugs/modalg_6/bug27341_324
@@ -23,6 +23,6 @@ build3d result
fit
checkprops result -l 211.007
-checknbshapes result -vertex 102 -edge 51
+checknbshapes result -vertex 106 -edge 53
checkview -screenshot -2d -path ${imagedir}/${test_image}.png
diff --git a/tests/bugs/modalg_6/bug27341_328 b/tests/bugs/modalg_6/bug27341_328
index 4aef177764..383ea1aba9 100644
--- a/tests/bugs/modalg_6/bug27341_328
+++ b/tests/bugs/modalg_6/bug27341_328
@@ -23,6 +23,6 @@ build3d result
fit
checkprops result -l 40.3211
-checknbshapes result -vertex 60 -edge 30
+checknbshapes result -vertex 62 -edge 31
checkview -screenshot -2d -path ${imagedir}/${test_image}.png
diff --git a/tests/bugs/modalg_6/bug27341_329 b/tests/bugs/modalg_6/bug27341_329
index 9d5402b9b7..cb537eae0d 100644
--- a/tests/bugs/modalg_6/bug27341_329
+++ b/tests/bugs/modalg_6/bug27341_329
@@ -23,6 +23,6 @@ build3d result
fit
checkprops result -l 1126.76
-checknbshapes result -vertex 280 -edge 140
+checknbshapes result -vertex 284 -edge 142
checkview -screenshot -2d -path ${imagedir}/${test_image}.png
diff --git a/tests/bugs/modalg_6/bug27719_101 b/tests/bugs/modalg_6/bug27719_101
new file mode 100644
index 0000000000..adce67af17
--- /dev/null
+++ b/tests/bugs/modalg_6/bug27719_101
@@ -0,0 +1,26 @@
+puts "============"
+puts "OCC27719"
+puts "============"
+puts ""
+######################################################
+# Incorrect exact HLR results
+######################################################
+
+pload QAcommands
+
+restore [locate_data_file bug27719_Extruded.brep] a
+
+set viewname "axo"
+
+top
+clear
+
+OCC27341 result a ${viewname}
+build3d result
+
+fit
+
+checkprops result -l 4.04214
+checknbshapes result -vertex 16 -edge 8
+
+checkview -screenshot -2d -path ${imagedir}/${test_image}.png
diff --git a/tests/bugs/modalg_6/bug27719_102 b/tests/bugs/modalg_6/bug27719_102
new file mode 100644
index 0000000000..2e06c7090b
--- /dev/null
+++ b/tests/bugs/modalg_6/bug27719_102
@@ -0,0 +1,26 @@
+puts "============"
+puts "OCC27719"
+puts "============"
+puts ""
+######################################################
+# Incorrect exact HLR results
+######################################################
+
+pload QAcommands
+
+restore [locate_data_file bug27719_Extruded.brep] a
+
+set viewname "top"
+
+top
+clear
+
+OCC27341 result a ${viewname}
+build3d result
+
+fit
+
+checkprops result -l 5.79737
+checknbshapes result -vertex 22 -edge 11
+
+checkview -screenshot -2d -path ${imagedir}/${test_image}.png
diff --git a/tests/bugs/modalg_6/bug27719_103 b/tests/bugs/modalg_6/bug27719_103
new file mode 100644
index 0000000000..1605872c26
--- /dev/null
+++ b/tests/bugs/modalg_6/bug27719_103
@@ -0,0 +1,26 @@
+puts "============"
+puts "OCC27719"
+puts "============"
+puts ""
+######################################################
+# Incorrect exact HLR results
+######################################################
+
+pload QAcommands
+
+restore [locate_data_file bug27719_Extruded.brep] a
+
+set viewname "bottom"
+
+top
+clear
+
+OCC27341 result a ${viewname}
+build3d result
+
+fit
+
+checkprops result -l 6.15279
+checknbshapes result -vertex 22 -edge 11
+
+checkview -screenshot -2d -path ${imagedir}/${test_image}.png
diff --git a/tests/bugs/modalg_6/bug27719_104 b/tests/bugs/modalg_6/bug27719_104
new file mode 100644
index 0000000000..f7cab1b4dd
--- /dev/null
+++ b/tests/bugs/modalg_6/bug27719_104
@@ -0,0 +1,26 @@
+puts "============"
+puts "OCC27719"
+puts "============"
+puts ""
+######################################################
+# Incorrect exact HLR results
+######################################################
+
+pload QAcommands
+
+restore [locate_data_file bug27719_Extruded.brep] a
+
+set viewname "front"
+
+top
+clear
+
+OCC27341 result a ${viewname}
+build3d result
+
+fit
+
+checkprops result -l 7.45731
+checknbshapes result -vertex 24 -edge 12
+
+checkview -screenshot -2d -path ${imagedir}/${test_image}.png
diff --git a/tests/bugs/modalg_6/bug27719_105 b/tests/bugs/modalg_6/bug27719_105
new file mode 100644
index 0000000000..7f6237c5bf
--- /dev/null
+++ b/tests/bugs/modalg_6/bug27719_105
@@ -0,0 +1,26 @@
+puts "============"
+puts "OCC27719"
+puts "============"
+puts ""
+######################################################
+# Incorrect exact HLR results
+######################################################
+
+pload QAcommands
+
+restore [locate_data_file bug27719_Extruded.brep] a
+
+set viewname "back"
+
+top
+clear
+
+OCC27341 result a ${viewname}
+build3d result
+
+fit
+
+checkprops result -l 7.48768
+checknbshapes result -vertex 22 -edge 11
+
+checkview -screenshot -2d -path ${imagedir}/${test_image}.png
diff --git a/tests/bugs/modalg_6/bug27719_201 b/tests/bugs/modalg_6/bug27719_201
new file mode 100644
index 0000000000..4040e2eae6
--- /dev/null
+++ b/tests/bugs/modalg_6/bug27719_201
@@ -0,0 +1,26 @@
+puts "============"
+puts "OCC27719"
+puts "============"
+puts ""
+######################################################
+# Incorrect exact HLR results
+######################################################
+
+pload QAcommands
+
+restore [locate_data_file bug27719_Extruded2.brep] a
+
+set viewname "axo"
+
+top
+clear
+
+OCC27341 result a ${viewname}
+build3d result
+
+fit
+
+checkprops result -l 4.53263
+checknbshapes result -vertex 14 -edge 7
+
+checkview -screenshot -2d -path ${imagedir}/${test_image}.png
diff --git a/tests/bugs/modalg_6/bug27719_202 b/tests/bugs/modalg_6/bug27719_202
new file mode 100644
index 0000000000..4f625ad0c7
--- /dev/null
+++ b/tests/bugs/modalg_6/bug27719_202
@@ -0,0 +1,26 @@
+puts "============"
+puts "OCC27719"
+puts "============"
+puts ""
+######################################################
+# Incorrect exact HLR results
+######################################################
+
+pload QAcommands
+
+restore [locate_data_file bug27719_Extruded2.brep] a
+
+set viewname "top"
+
+top
+clear
+
+OCC27341 result a ${viewname}
+build3d result
+
+fit
+
+checkprops result -l 4.79563
+checknbshapes result -vertex 16 -edge 8
+
+checkview -screenshot -2d -path ${imagedir}/${test_image}.png
diff --git a/tests/bugs/modalg_6/bug27719_203 b/tests/bugs/modalg_6/bug27719_203
new file mode 100644
index 0000000000..dc56153149
--- /dev/null
+++ b/tests/bugs/modalg_6/bug27719_203
@@ -0,0 +1,26 @@
+puts "============"
+puts "OCC27719"
+puts "============"
+puts ""
+######################################################
+# Incorrect exact HLR results
+######################################################
+
+pload QAcommands
+
+restore [locate_data_file bug27719_Extruded2.brep] a
+
+set viewname "bottom"
+
+top
+clear
+
+OCC27341 result a ${viewname}
+build3d result
+
+fit
+
+checkprops result -l 4.64864
+checknbshapes result -vertex 16 -edge 8
+
+checkview -screenshot -2d -path ${imagedir}/${test_image}.png
diff --git a/tests/bugs/modalg_6/bug27719_204 b/tests/bugs/modalg_6/bug27719_204
new file mode 100644
index 0000000000..59fc854d78
--- /dev/null
+++ b/tests/bugs/modalg_6/bug27719_204
@@ -0,0 +1,26 @@
+puts "============"
+puts "OCC27719"
+puts "============"
+puts ""
+######################################################
+# Incorrect exact HLR results
+######################################################
+
+pload QAcommands
+
+restore [locate_data_file bug27719_Extruded2.brep] a
+
+set viewname "front"
+
+top
+clear
+
+OCC27341 result a ${viewname}
+build3d result
+
+fit
+
+checkprops result -l 5.96312
+checknbshapes result -vertex 16 -edge 8
+
+checkview -screenshot -2d -path ${imagedir}/${test_image}.png
diff --git a/tests/bugs/modalg_6/bug27719_205 b/tests/bugs/modalg_6/bug27719_205
new file mode 100644
index 0000000000..8a9b983a28
--- /dev/null
+++ b/tests/bugs/modalg_6/bug27719_205
@@ -0,0 +1,26 @@
+puts "============"
+puts "OCC27719"
+puts "============"
+puts ""
+######################################################
+# Incorrect exact HLR results
+######################################################
+
+pload QAcommands
+
+restore [locate_data_file bug27719_Extruded2.brep] a
+
+set viewname "back"
+
+top
+clear
+
+OCC27341 result a ${viewname}
+build3d result
+
+fit
+
+checkprops result -l 5.61843
+checknbshapes result -vertex 16 -edge 8
+
+checkview -screenshot -2d -path ${imagedir}/${test_image}.png
diff --git a/tests/bugs/modalg_6/bug27720_2 b/tests/bugs/modalg_6/bug27720_2
new file mode 100644
index 0000000000..f9b7190fca
--- /dev/null
+++ b/tests/bugs/modalg_6/bug27720_2
@@ -0,0 +1,26 @@
+puts "============"
+puts "OCC27720"
+puts "============"
+puts ""
+######################################################
+# HLRBrep_Algo BSpline missing edges
+######################################################
+
+pload QAcommands
+
+restore [locate_data_file bug27720_BSpline.brep] a
+
+set viewname "top"
+
+top
+clear
+
+OCC27341 result a ${viewname}
+build3d result
+
+fit
+
+checkprops result -l 0.980942
+checknbshapes result -vertex 54 -edge 27
+
+checkview -screenshot -2d -path ${imagedir}/${test_image}.png
diff --git a/tests/bugs/modalg_6/bug27720_3 b/tests/bugs/modalg_6/bug27720_3
new file mode 100644
index 0000000000..2e02b8826d
--- /dev/null
+++ b/tests/bugs/modalg_6/bug27720_3
@@ -0,0 +1,26 @@
+puts "============"
+puts "OCC27720"
+puts "============"
+puts ""
+######################################################
+# HLRBrep_Algo BSpline missing edges
+######################################################
+
+pload QAcommands
+
+restore [locate_data_file bug27720_BSpline.brep] a
+
+set viewname "bottom"
+
+top
+clear
+
+OCC27341 result a ${viewname}
+build3d result
+
+fit
+
+checkprops result -l 0.958458
+checknbshapes result -vertex 52 -edge 26
+
+checkview -screenshot -2d -path ${imagedir}/${test_image}.png