From: nbv <nbv@opencascade.com>
Date: Thu, 29 Nov 2018 07:02:14 +0000 (+0300)
Subject: Test for 0027976: Unstable work of 2d intersection algorithm for two lines
X-Git-Url: http://git.dev.opencascade.org/gitweb/?a=commitdiff_plain;h=f62fe184cf2d322aa50353ea6e60f5eb91275eb2;p=occt-copy.git

Test for 0027976: Unstable work of 2d intersection algorithm for two lines

1. Test case for the issue has been created.
The problem is still reproduced on MASTER.

2. Some test cases have been moved to lowalgos/2dinter grid.
---

diff --git a/tests/bugs/modalg_5/bug23706_4 b/tests/bugs/modalg_5/bug23706_4
deleted file mode 100755
index e84fa2b97c..0000000000
--- a/tests/bugs/modalg_5/bug23706_4
+++ /dev/null
@@ -1,37 +0,0 @@
-puts "============"
-puts "OCC23706"
-puts "============"
-puts ""
-#########################################################################
-# Cannot project point on curve
-#########################################################################
-
-2dbsplinecurve c1 2 5 0 3 0.2 1 0.3 1 0.4 1 0.5 3 2 0 1 3 -1 1 5 5 1 5 5 1 6 8 1 4 7 1
-2dbsplinecurve c3 2 4 1 3 2 1 3 1 5 3 6 3 1 5.001 5.01 1 5.001 5.01 1 3 9 1 2 11 1
-set info [2dintersect c1 c3]
-
-if { [regexp "Intersection point 1" $info] != 1  } {
-   puts "Error : Intersection should have two points"
-} else {
-   regexp {Intersection point 1 +: +([-0-9.+eE]+)} $info full p11t
-   regexp {Intersection point 1 +: +[-0-9.+eE]+ +([-0-9.+eE]+)} $info full p12t
-}
-
-if { [regexp "Intersection point 2" $info] != 1  } {
-   puts "Error : Intersection should have two points"
-} else {
-   regexp {Intersection point 2 +: +([-0-9.+eE]+)} $info full p21t
-   regexp {Intersection point 2 +: +[-0-9.+eE]+ +([-0-9.+eE]+)} $info full p22t
-}
-
-set p11 [expr round($p11t*10000)]
-set p12 [expr round($p12t*10000)]
-set p21 [expr round($p21t*10000)]
-set p22 [expr round($p22t*10000)]
-
-if { ${p11} != 50024 || ${p12} != 50072 || ${p21} != 40024 || ${p22} != 70012 } {
-    puts "Error : Points of intersection have wrong coordinates"
-} else {
-    puts "OK: Points of intersection are right"
-}
-
diff --git a/tests/bugs/modalg_5/bug23706_5 b/tests/bugs/modalg_5/bug23706_5
deleted file mode 100755
index 19d169fb6b..0000000000
--- a/tests/bugs/modalg_5/bug23706_5
+++ /dev/null
@@ -1,34 +0,0 @@
-puts "============"
-puts "OCC23706"
-puts "============"
-puts ""
-#########################################################################
-# Cannot project point on curve
-#########################################################################
-
-2dbsplinecurve c1 2 5 0 3 0.2 1 0.3 1 0.4 1 0.5 3 2 0 1 3 -1 1 5 5 1 5 5 1 6 8 1 4 7 1
-2dbsplinecurve c2 2 4 1 3 2 1 3 1 5 3 6 3 1 5 5 1 5 5 1 3 9 1 2 11 1
-set info [2dintersect c1 c2]
-
-if { [regexp "Intersection point 1" $info] != 1  } {
-   puts "Error : Intersection should have two points"
-} else {
-   regexp {Intersection point 1 +: +([-0-9.+eE]+)} $info full p11
-   regexp {Intersection point 1 +: +[-0-9.+eE]+ +([-0-9.+eE]+)} $info full p12
-}
-
-if { [regexp "Intersection point 2" $info] != 1  } {
-   puts "Error : Intersection should have two points"
-} else {
-   regexp {Intersection point 2 +: +([-0-9.+eE]+)} $info full p21t
-   regexp {Intersection point 2 +: +[-0-9.+eE]+ +([-0-9.+eE]+)} $info full p22t
-}
-
-set p21 [expr int($p21t)]
-set p22 [expr int($p22t)]
-
-if { ${p11} != 5 || ${p12} != 5 || ${p21} != 4 || ${p22} != 7 } {
-    puts "Error : Points of intersection have wrong coordinates"
-} else {
-    puts "OK: Points of intersection are right"
-}
diff --git a/tests/bugs/modalg_6/bug25593 b/tests/bugs/modalg_6/bug25593
deleted file mode 100755
index 9917a0d5c4..0000000000
--- a/tests/bugs/modalg_6/bug25593
+++ /dev/null
@@ -1,60 +0,0 @@
-puts "============"
-puts "OCC25593"
-puts "============"
-puts ""
-#########################################################################
-# Number of intersection points for 2d curves depends on the order of arguments in command "2dintersect"
-#########################################################################
-
-restore [locate_data_file bug25593_face1.brep] b
-pcurve b
-
-puts "Intersection 1"
-set info1 [2dintersect b_2 b_3 -tol 1.e-10]
-regexp {Intersection point 1 : +([-0-9.+eE]+) +([-0-9.+eE]+)} $info1 full p1x p1y
-regexp {parameter on the fist: +([-0-9.+eE]+) +parameter on the second: +([-0-9.+eE]+)} $info1 full par1f par1s
-
-puts "Intersection 2"
-set info2 [2dintersect b_3 b_2 -tol 1.e-10]
-regexp {Intersection point 1 : +([-0-9.+eE]+) +([-0-9.+eE]+)} $info2 full p2x p2y
-regexp {parameter on the fist: +([-0-9.+eE]+) +parameter on the second: +([-0-9.+eE]+)} $info2 full par2f par2s
-
-set NbIP1 1
-if { [regexp "Intersection point 1" $info1] != 1  } {
-   puts "Error : Intersection 1 should have one point"
-   set NbIP1 0
-}
-if { [regexp "Intersection point 2" $info1] == 1  } {
-   puts "Error : Intersection 1 should have one point"
-   set NbIP1 2
-}
-puts "NbIP1=$NbIP1"
-
-set NbIP2 1
-if { [regexp "Intersection point 1" $info2] != 1  } {
-   puts "Error : Intersection 2 should have one point"
-   set NbIP2 0
-}
-if { [regexp "Intersection point 2" $info2] == 1  } {
-   puts "Error : Intersection 2 should have one point"
-   set NbIP2 2
-}
-puts "NbIP2=$NbIP2"
-
-if { $NbIP1 != 1 || $NbIP2 != 1 } {
-   puts "ERROR: Wrong solutions number"
-} else {
-   puts "p1x=$p1x p1y=$p1y par1f=$par1f $par1s"
-   puts "p2x=$p2x p2y=$p2y par2f=$par2f $par2s"
-   set sqd [expr ($p1x-$p2x)*($p1x-$p2x)+($p1y-$p2y)*($p1y-$p2y)]
-   if { $sqd > 1.0e-14 } {
-      puts "ERROR: Intersection points are different"
-   } else {
-      puts "OK: Intersection points are equal"
-   }
-   if { (abs($par1f - $par2s) > 1.0e-9) || (abs($par1s - $par2f) > 1.0e-9) } {
-      puts "ERROR: Parameters on intersecting curves are not coincided"
-   } else {
-      puts "OK: Parameters on intersecting curves are coincided"
-   }
-}
diff --git a/tests/bugs/modalg_6/bug26099 b/tests/bugs/modalg_6/bug26099
deleted file mode 100644
index 8fe535c419..0000000000
--- a/tests/bugs/modalg_6/bug26099
+++ /dev/null
@@ -1,23 +0,0 @@
-puts "========"
-puts "OCC26099"
-puts "========"
-puts ""
-##################################################
-# Wrong result done by 2d intersection algorithm
-##################################################
-
-restore [locate_data_file OCC26099-f.brep] f
-explode f e
-pcurve c4 f_4 f
-pcurve c5 f_5 f
-set bug_info [2dintersect c4 c5]
-
-if {[regexp {fist: ([\-0-9.]*) .*second: ([\-0-9.]*)} $bug_info dummy par1 par2] == 0} {
-  puts "ERROR: OCC26099 is reproduced. No intersection."
-}
-
-set refpar1 0.98989794855663704
-set refpar2 0
-if {[expr abs($par1-$refpar1)] > 0.0001 || [expr abs($par2-$refpar2)] > 0.0001} {
-  puts "ERROR: OCC26099 is reproduced. Parameters are $par1 and $par2, expected $refpar1 and $refpar2"
-}
diff --git a/tests/bugs/modalg_7/bug29162 b/tests/bugs/modalg_7/bug29162
deleted file mode 100644
index f001945729..0000000000
--- a/tests/bugs/modalg_7/bug29162
+++ /dev/null
@@ -1,22 +0,0 @@
-puts "========"
-puts "OCC29162"
-puts "========"
-puts ""
-##################################################
-# Geom2dInt_GInter algorithm does not find 
-# intersection of ellipse and line
-##################################################
-
-ellipse e -610.348096534595 -710.720096056787 0.999999902285153 0.000442074298181498 15.0066332711999 0.291884102212871
-trim e e 3.09462291909258 9.37780822627216
-
-line l -625.34430362036 -680.713463264921 -0.000252749178714602 -0.999999968058926
-trim l l 0 30.0132665523925
-
-set cx 0
-set cy 0
-
-regexp {Intersection point 1 : ([-0-9.+eE]+) ([-0-9.+eE]+)} [2dintersect e l ] full cx cy
-checkreal n1 $cx -625.35188801291508 1.e-7 1.e-7
-checkreal n2 $cy -710.72104765746838 1.e-7 1.e-7
-
diff --git a/tests/bugs/moddata_2/bug23587 b/tests/bugs/moddata_2/bug23587
deleted file mode 100755
index ee41d7906d..0000000000
--- a/tests/bugs/moddata_2/bug23587
+++ /dev/null
@@ -1,36 +0,0 @@
-puts "============"
-puts "CR23587"
-puts "==========="
-puts ""
-###############################################################################
-# Operation "2dintersect "in TestHarness can not find intersection point of two intersecting 2d curves.
-###############################################################################
-
-restore [locate_data_file bug23587_IntEdges.brep] a
-
-explode a 
-
-plane pl1 0 0 0 0 0 1
-trim trpl1 pl1 -1000 1000 -1000 1000
-mkface f1 trpl1
-pcurve c1 a_1 f1
-pcurve c2 a_2 f1
-pcurve c3 a_3 f1
-pcurve c4 a_4 f1
-set inter1 [2dintersect c1 c2 -tol 1.e-6]
-set inter2 [2dintersect c3 c2 -tol 1.e-6]
-set inter3 [2dintersect c1 c4 -tol 1.e-6]
-set inter4 [2dintersect c3 c4 -tol 1.e-6]
-set int1 [regexp {Intersection point 1} $inter1]
-set int2 [regexp {Intersection point 1} $inter2]
-set int3 [regexp {Intersection point 1} $inter3]
-set int4 [regexp {Intersection point 1} $inter4]
-
-if { $int1 == 0 || $int2 == 0 || $int3 == 0 || $int4 ==0 } {
-    puts "Error : Intersection is not found"
-} 
-
-av2d
-2dfit
-
-xwd ${imagedir}/${test_image}.png
diff --git a/tests/bugs/moddata_2/bug4426_1 b/tests/bugs/moddata_2/bug4426_1
deleted file mode 100755
index 0fc291e387..0000000000
--- a/tests/bugs/moddata_2/bug4426_1
+++ /dev/null
@@ -1,22 +0,0 @@
-puts "================"
-puts "OCC4426"
-puts "================"
-puts ""
-#######################################################################################
-# Incorrect result of intersection in 2D between circle and line
-#######################################################################################
-
-v2d2
-circle c1 2 2 1
-2dfit
-2dzoom 120
-line l1 3 0 0 1
-2dintersect l1 c1
-erase l1 c1
-2dfit
-
-puts "ATTENTION! Check following:"
-puts "There is only one intersection point (green X)"
-
-checkview -display result -2d -path ${imagedir}/${test_image}.png
-
diff --git a/tests/bugs/moddata_2/bug4426_2 b/tests/bugs/moddata_2/bug4426_2
deleted file mode 100755
index 6e7e975533..0000000000
--- a/tests/bugs/moddata_2/bug4426_2
+++ /dev/null
@@ -1,22 +0,0 @@
-puts "================"
-puts "OCC4426"
-puts "================"
-puts ""
-#######################################################################################
-# Incorrect result of intersection in 2D between circle and line
-#######################################################################################
-
-v2d2
-line ll1 0 0 0.3 0.7
-line ll2 0 0 0.37 0.63
-trim tll1 ll1 -0.00001 0.00001
-trim tll2 ll2 -0.00001 0.00001
-donly tll1 tll2
-2dintersect tll1 tll2
-2dfit
-
-puts "ATTENTION! Check following:"
-puts "There is the intersection point (green X) on center of grid axis"
-
-checkview -display result -2d -path ${imagedir}/${test_image}.png
-
diff --git a/tests/bugs/moddata_3/bug24800 b/tests/bugs/moddata_3/bug24800
deleted file mode 100755
index 60b8cbcef2..0000000000
--- a/tests/bugs/moddata_3/bug24800
+++ /dev/null
@@ -1,22 +0,0 @@
-puts "============"
-puts "CR24800"
-puts "==========="
-puts ""
-###############################################################################
-# Point of intersection was not found for 2d offset curve.
-###############################################################################
-
-restore [locate_data_file bug24800_curve2.draw] c2
-
-set inter1 [2dintersect c2]
-
-set int1 [regexp {Intersection point 1} ${inter1}]
-
-if { ${int1} == 0 } {
-    puts "Error : Intersection is not found"
-} 
-
-av2d
-2dfit
-
-xwd ${imagedir}/${test_image}.png
diff --git a/tests/bugs/moddata_3/bug25876 b/tests/bugs/moddata_3/bug25876
deleted file mode 100755
index 826485789c..0000000000
--- a/tests/bugs/moddata_3/bug25876
+++ /dev/null
@@ -1,36 +0,0 @@
-puts "============"
-puts "CR25876"
-puts "==========="
-puts ""
-###############################################################################
-# Geom2dAPI_InterCurveCurve returns only one intersection point instead of two intersection points
-###############################################################################
-
-restore [locate_data_file bug25876_oc_test_firstcircle.brep] e1
-restore [locate_data_file bug25876_oc_test_secondcircle.brep] e2
-
-explode e1
-explode e2
-
-mk2dcurve c1 e1_1
-mk2dcurve c2 e2_1
-
-set inter1 [2dintersect c1 c2 -tol 1e-3]
-set int1 [regexp {Intersection point 2} ${inter1}]
-if { ${int1} == 0 } {
-    puts "Error : Second intersection is not found"
-} 
-
-#smallview -2D-
-view 1 -2D- 728 450 400 400
-2dfit
-xwd ${imagedir}/${test_image}_1.png
-donly c1 c2
-
-set inter2 [2dintersect c1 c2 -tol 1e-7]
-set int2 [regexp {Intersection point 2} ${inter2}]
-if { ${int2} == 0 } {
-    puts "Error : Second intersection is not found"
-} 
-
-xwd ${imagedir}/${test_image}_2.png
diff --git a/tests/bugs/step/bug24100 b/tests/bugs/step/bug24100
deleted file mode 100644
index 1df0bc3f54..0000000000
--- a/tests/bugs/step/bug24100
+++ /dev/null
@@ -1,21 +0,0 @@
-puts "TODO OCC24100 ALL: Error : Bad pcurve is built on a face while converting the shape from STEP format"
-
-puts "========"
-puts "OCC24100"
-puts "========"
-puts ""
-############################################################################
-# Bad pcurve is built on a face while converting the shape from STEP format.
-############################################################################
-
-stepread [locate_data_file bug24100_REFLECT_CURVE_PART_5_SOL_ohne_Metadaten.stp] a *
-
-explode a_1 f
-
-pcurve a_1_686
-
-set inter2 [2dintersect a_1_686_4 a_1_686_3]
-set int2 [regexp {Intersection point 2} ${inter2}]
-if { ${int2} == 1 } {
-    puts "Error : Bad pcurve is built on a face while converting the shape from STEP format"
-} 
diff --git a/tests/lowalgos/2dinter/bug23587 b/tests/lowalgos/2dinter/bug23587
new file mode 100644
index 0000000000..ee41d7906d
--- /dev/null
+++ b/tests/lowalgos/2dinter/bug23587
@@ -0,0 +1,36 @@
+puts "============"
+puts "CR23587"
+puts "==========="
+puts ""
+###############################################################################
+# Operation "2dintersect "in TestHarness can not find intersection point of two intersecting 2d curves.
+###############################################################################
+
+restore [locate_data_file bug23587_IntEdges.brep] a
+
+explode a 
+
+plane pl1 0 0 0 0 0 1
+trim trpl1 pl1 -1000 1000 -1000 1000
+mkface f1 trpl1
+pcurve c1 a_1 f1
+pcurve c2 a_2 f1
+pcurve c3 a_3 f1
+pcurve c4 a_4 f1
+set inter1 [2dintersect c1 c2 -tol 1.e-6]
+set inter2 [2dintersect c3 c2 -tol 1.e-6]
+set inter3 [2dintersect c1 c4 -tol 1.e-6]
+set inter4 [2dintersect c3 c4 -tol 1.e-6]
+set int1 [regexp {Intersection point 1} $inter1]
+set int2 [regexp {Intersection point 1} $inter2]
+set int3 [regexp {Intersection point 1} $inter3]
+set int4 [regexp {Intersection point 1} $inter4]
+
+if { $int1 == 0 || $int2 == 0 || $int3 == 0 || $int4 ==0 } {
+    puts "Error : Intersection is not found"
+} 
+
+av2d
+2dfit
+
+xwd ${imagedir}/${test_image}.png
diff --git a/tests/lowalgos/2dinter/bug23706_4 b/tests/lowalgos/2dinter/bug23706_4
new file mode 100644
index 0000000000..e84fa2b97c
--- /dev/null
+++ b/tests/lowalgos/2dinter/bug23706_4
@@ -0,0 +1,37 @@
+puts "============"
+puts "OCC23706"
+puts "============"
+puts ""
+#########################################################################
+# Cannot project point on curve
+#########################################################################
+
+2dbsplinecurve c1 2 5 0 3 0.2 1 0.3 1 0.4 1 0.5 3 2 0 1 3 -1 1 5 5 1 5 5 1 6 8 1 4 7 1
+2dbsplinecurve c3 2 4 1 3 2 1 3 1 5 3 6 3 1 5.001 5.01 1 5.001 5.01 1 3 9 1 2 11 1
+set info [2dintersect c1 c3]
+
+if { [regexp "Intersection point 1" $info] != 1  } {
+   puts "Error : Intersection should have two points"
+} else {
+   regexp {Intersection point 1 +: +([-0-9.+eE]+)} $info full p11t
+   regexp {Intersection point 1 +: +[-0-9.+eE]+ +([-0-9.+eE]+)} $info full p12t
+}
+
+if { [regexp "Intersection point 2" $info] != 1  } {
+   puts "Error : Intersection should have two points"
+} else {
+   regexp {Intersection point 2 +: +([-0-9.+eE]+)} $info full p21t
+   regexp {Intersection point 2 +: +[-0-9.+eE]+ +([-0-9.+eE]+)} $info full p22t
+}
+
+set p11 [expr round($p11t*10000)]
+set p12 [expr round($p12t*10000)]
+set p21 [expr round($p21t*10000)]
+set p22 [expr round($p22t*10000)]
+
+if { ${p11} != 50024 || ${p12} != 50072 || ${p21} != 40024 || ${p22} != 70012 } {
+    puts "Error : Points of intersection have wrong coordinates"
+} else {
+    puts "OK: Points of intersection are right"
+}
+
diff --git a/tests/lowalgos/2dinter/bug23706_5 b/tests/lowalgos/2dinter/bug23706_5
new file mode 100644
index 0000000000..19d169fb6b
--- /dev/null
+++ b/tests/lowalgos/2dinter/bug23706_5
@@ -0,0 +1,34 @@
+puts "============"
+puts "OCC23706"
+puts "============"
+puts ""
+#########################################################################
+# Cannot project point on curve
+#########################################################################
+
+2dbsplinecurve c1 2 5 0 3 0.2 1 0.3 1 0.4 1 0.5 3 2 0 1 3 -1 1 5 5 1 5 5 1 6 8 1 4 7 1
+2dbsplinecurve c2 2 4 1 3 2 1 3 1 5 3 6 3 1 5 5 1 5 5 1 3 9 1 2 11 1
+set info [2dintersect c1 c2]
+
+if { [regexp "Intersection point 1" $info] != 1  } {
+   puts "Error : Intersection should have two points"
+} else {
+   regexp {Intersection point 1 +: +([-0-9.+eE]+)} $info full p11
+   regexp {Intersection point 1 +: +[-0-9.+eE]+ +([-0-9.+eE]+)} $info full p12
+}
+
+if { [regexp "Intersection point 2" $info] != 1  } {
+   puts "Error : Intersection should have two points"
+} else {
+   regexp {Intersection point 2 +: +([-0-9.+eE]+)} $info full p21t
+   regexp {Intersection point 2 +: +[-0-9.+eE]+ +([-0-9.+eE]+)} $info full p22t
+}
+
+set p21 [expr int($p21t)]
+set p22 [expr int($p22t)]
+
+if { ${p11} != 5 || ${p12} != 5 || ${p21} != 4 || ${p22} != 7 } {
+    puts "Error : Points of intersection have wrong coordinates"
+} else {
+    puts "OK: Points of intersection are right"
+}
diff --git a/tests/lowalgos/2dinter/bug24100 b/tests/lowalgos/2dinter/bug24100
new file mode 100644
index 0000000000..c8b94cf373
--- /dev/null
+++ b/tests/lowalgos/2dinter/bug24100
@@ -0,0 +1,22 @@
+puts "TODO OCC24100 ALL: Error : Bad pcurve is built on a face while converting the shape from STEP format"
+
+puts "========"
+puts "OCC24100"
+puts "========"
+puts ""
+############################################################################
+# Bad pcurve is built on a face while converting the shape from STEP format.
+############################################################################
+
+pload XDE
+stepread [locate_data_file bug24100_REFLECT_CURVE_PART_5_SOL_ohne_Metadaten.stp] a *
+
+explode a_1 f
+
+pcurve a_1_686
+
+set inter2 [2dintersect a_1_686_4 a_1_686_3]
+set int2 [regexp {Intersection point 2} ${inter2}]
+if { ${int2} == 1 } {
+    puts "Error : Bad pcurve is built on a face while converting the shape from STEP format"
+} 
diff --git a/tests/lowalgos/2dinter/bug24800 b/tests/lowalgos/2dinter/bug24800
new file mode 100644
index 0000000000..60b8cbcef2
--- /dev/null
+++ b/tests/lowalgos/2dinter/bug24800
@@ -0,0 +1,22 @@
+puts "============"
+puts "CR24800"
+puts "==========="
+puts ""
+###############################################################################
+# Point of intersection was not found for 2d offset curve.
+###############################################################################
+
+restore [locate_data_file bug24800_curve2.draw] c2
+
+set inter1 [2dintersect c2]
+
+set int1 [regexp {Intersection point 1} ${inter1}]
+
+if { ${int1} == 0 } {
+    puts "Error : Intersection is not found"
+} 
+
+av2d
+2dfit
+
+xwd ${imagedir}/${test_image}.png
diff --git a/tests/lowalgos/2dinter/bug25593 b/tests/lowalgos/2dinter/bug25593
new file mode 100644
index 0000000000..9917a0d5c4
--- /dev/null
+++ b/tests/lowalgos/2dinter/bug25593
@@ -0,0 +1,60 @@
+puts "============"
+puts "OCC25593"
+puts "============"
+puts ""
+#########################################################################
+# Number of intersection points for 2d curves depends on the order of arguments in command "2dintersect"
+#########################################################################
+
+restore [locate_data_file bug25593_face1.brep] b
+pcurve b
+
+puts "Intersection 1"
+set info1 [2dintersect b_2 b_3 -tol 1.e-10]
+regexp {Intersection point 1 : +([-0-9.+eE]+) +([-0-9.+eE]+)} $info1 full p1x p1y
+regexp {parameter on the fist: +([-0-9.+eE]+) +parameter on the second: +([-0-9.+eE]+)} $info1 full par1f par1s
+
+puts "Intersection 2"
+set info2 [2dintersect b_3 b_2 -tol 1.e-10]
+regexp {Intersection point 1 : +([-0-9.+eE]+) +([-0-9.+eE]+)} $info2 full p2x p2y
+regexp {parameter on the fist: +([-0-9.+eE]+) +parameter on the second: +([-0-9.+eE]+)} $info2 full par2f par2s
+
+set NbIP1 1
+if { [regexp "Intersection point 1" $info1] != 1  } {
+   puts "Error : Intersection 1 should have one point"
+   set NbIP1 0
+}
+if { [regexp "Intersection point 2" $info1] == 1  } {
+   puts "Error : Intersection 1 should have one point"
+   set NbIP1 2
+}
+puts "NbIP1=$NbIP1"
+
+set NbIP2 1
+if { [regexp "Intersection point 1" $info2] != 1  } {
+   puts "Error : Intersection 2 should have one point"
+   set NbIP2 0
+}
+if { [regexp "Intersection point 2" $info2] == 1  } {
+   puts "Error : Intersection 2 should have one point"
+   set NbIP2 2
+}
+puts "NbIP2=$NbIP2"
+
+if { $NbIP1 != 1 || $NbIP2 != 1 } {
+   puts "ERROR: Wrong solutions number"
+} else {
+   puts "p1x=$p1x p1y=$p1y par1f=$par1f $par1s"
+   puts "p2x=$p2x p2y=$p2y par2f=$par2f $par2s"
+   set sqd [expr ($p1x-$p2x)*($p1x-$p2x)+($p1y-$p2y)*($p1y-$p2y)]
+   if { $sqd > 1.0e-14 } {
+      puts "ERROR: Intersection points are different"
+   } else {
+      puts "OK: Intersection points are equal"
+   }
+   if { (abs($par1f - $par2s) > 1.0e-9) || (abs($par1s - $par2f) > 1.0e-9) } {
+      puts "ERROR: Parameters on intersecting curves are not coincided"
+   } else {
+      puts "OK: Parameters on intersecting curves are coincided"
+   }
+}
diff --git a/tests/lowalgos/2dinter/bug25876 b/tests/lowalgos/2dinter/bug25876
new file mode 100644
index 0000000000..826485789c
--- /dev/null
+++ b/tests/lowalgos/2dinter/bug25876
@@ -0,0 +1,36 @@
+puts "============"
+puts "CR25876"
+puts "==========="
+puts ""
+###############################################################################
+# Geom2dAPI_InterCurveCurve returns only one intersection point instead of two intersection points
+###############################################################################
+
+restore [locate_data_file bug25876_oc_test_firstcircle.brep] e1
+restore [locate_data_file bug25876_oc_test_secondcircle.brep] e2
+
+explode e1
+explode e2
+
+mk2dcurve c1 e1_1
+mk2dcurve c2 e2_1
+
+set inter1 [2dintersect c1 c2 -tol 1e-3]
+set int1 [regexp {Intersection point 2} ${inter1}]
+if { ${int1} == 0 } {
+    puts "Error : Second intersection is not found"
+} 
+
+#smallview -2D-
+view 1 -2D- 728 450 400 400
+2dfit
+xwd ${imagedir}/${test_image}_1.png
+donly c1 c2
+
+set inter2 [2dintersect c1 c2 -tol 1e-7]
+set int2 [regexp {Intersection point 2} ${inter2}]
+if { ${int2} == 0 } {
+    puts "Error : Second intersection is not found"
+} 
+
+xwd ${imagedir}/${test_image}_2.png
diff --git a/tests/lowalgos/2dinter/bug26099 b/tests/lowalgos/2dinter/bug26099
new file mode 100644
index 0000000000..8fe535c419
--- /dev/null
+++ b/tests/lowalgos/2dinter/bug26099
@@ -0,0 +1,23 @@
+puts "========"
+puts "OCC26099"
+puts "========"
+puts ""
+##################################################
+# Wrong result done by 2d intersection algorithm
+##################################################
+
+restore [locate_data_file OCC26099-f.brep] f
+explode f e
+pcurve c4 f_4 f
+pcurve c5 f_5 f
+set bug_info [2dintersect c4 c5]
+
+if {[regexp {fist: ([\-0-9.]*) .*second: ([\-0-9.]*)} $bug_info dummy par1 par2] == 0} {
+  puts "ERROR: OCC26099 is reproduced. No intersection."
+}
+
+set refpar1 0.98989794855663704
+set refpar2 0
+if {[expr abs($par1-$refpar1)] > 0.0001 || [expr abs($par2-$refpar2)] > 0.0001} {
+  puts "ERROR: OCC26099 is reproduced. Parameters are $par1 and $par2, expected $refpar1 and $refpar2"
+}
diff --git a/tests/lowalgos/2dinter/bug27976 b/tests/lowalgos/2dinter/bug27976
new file mode 100644
index 0000000000..2c22e42023
--- /dev/null
+++ b/tests/lowalgos/2dinter/bug27976
@@ -0,0 +1,37 @@
+puts "========"
+puts "0027976: Unstable work of 2d intersection algorithm for two lines"
+puts "========"
+puts ""
+
+puts "TODO OCC27976 All: Error: wrong 2-th intersection result"
+
+set aRefPx 170.0
+set aRefPy 9620.0
+
+binrestore [locate_data_file bug27976_fe.bin] b
+explode b
+don b_1
+pcurve b_1
+
+smallview -2D-
+point p1 169.98949375765261 9619.9910661265931
+point p2 170.00862369283078 9620.0101960617721
+don p1 p2
+2dfit
+don b_1_4 b_1_5
+set log(1) [2dintersect b_1_4 b_1_5 -tol 1.e-10]
+checkview -screenshot -2d -path ${imagedir}/${test_image}_1.png
+
+trim c2d b_1_5 9610 9610.0000006891
+don b_1_4 c2d
+set log(2) [2dintersect b_1_4 c2d -tol 1.e-10]
+checkview -screenshot -2d -path ${imagedir}/${test_image}_2.png
+
+for {set i 1} {$i <= 2} {incr i} {
+  if { [regexp {Intersection point 1 : ([-0-9.+eE]+) ([-0-9.+eE]+)} $log($i) full cx($i) cy($i)] } {
+    set aDist($i) [2ddistpp $aRefPx $aRefPy $cx($i) $cy($i)]
+    checkreal Distance $aDist($i) 0.0 1.e-6 0.0
+  } else {
+    puts "Error: wrong $i-th intersection result"
+  }
+}
diff --git a/tests/lowalgos/2dinter/bug29162 b/tests/lowalgos/2dinter/bug29162
new file mode 100644
index 0000000000..f001945729
--- /dev/null
+++ b/tests/lowalgos/2dinter/bug29162
@@ -0,0 +1,22 @@
+puts "========"
+puts "OCC29162"
+puts "========"
+puts ""
+##################################################
+# Geom2dInt_GInter algorithm does not find 
+# intersection of ellipse and line
+##################################################
+
+ellipse e -610.348096534595 -710.720096056787 0.999999902285153 0.000442074298181498 15.0066332711999 0.291884102212871
+trim e e 3.09462291909258 9.37780822627216
+
+line l -625.34430362036 -680.713463264921 -0.000252749178714602 -0.999999968058926
+trim l l 0 30.0132665523925
+
+set cx 0
+set cy 0
+
+regexp {Intersection point 1 : ([-0-9.+eE]+) ([-0-9.+eE]+)} [2dintersect e l ] full cx cy
+checkreal n1 $cx -625.35188801291508 1.e-7 1.e-7
+checkreal n2 $cy -710.72104765746838 1.e-7 1.e-7
+
diff --git a/tests/lowalgos/2dinter/bug4426_1 b/tests/lowalgos/2dinter/bug4426_1
new file mode 100644
index 0000000000..0fc291e387
--- /dev/null
+++ b/tests/lowalgos/2dinter/bug4426_1
@@ -0,0 +1,22 @@
+puts "================"
+puts "OCC4426"
+puts "================"
+puts ""
+#######################################################################################
+# Incorrect result of intersection in 2D between circle and line
+#######################################################################################
+
+v2d2
+circle c1 2 2 1
+2dfit
+2dzoom 120
+line l1 3 0 0 1
+2dintersect l1 c1
+erase l1 c1
+2dfit
+
+puts "ATTENTION! Check following:"
+puts "There is only one intersection point (green X)"
+
+checkview -display result -2d -path ${imagedir}/${test_image}.png
+
diff --git a/tests/lowalgos/2dinter/bug4426_2 b/tests/lowalgos/2dinter/bug4426_2
new file mode 100644
index 0000000000..6e7e975533
--- /dev/null
+++ b/tests/lowalgos/2dinter/bug4426_2
@@ -0,0 +1,22 @@
+puts "================"
+puts "OCC4426"
+puts "================"
+puts ""
+#######################################################################################
+# Incorrect result of intersection in 2D between circle and line
+#######################################################################################
+
+v2d2
+line ll1 0 0 0.3 0.7
+line ll2 0 0 0.37 0.63
+trim tll1 ll1 -0.00001 0.00001
+trim tll2 ll2 -0.00001 0.00001
+donly tll1 tll2
+2dintersect tll1 tll2
+2dfit
+
+puts "ATTENTION! Check following:"
+puts "There is the intersection point (green X) on center of grid axis"
+
+checkview -display result -2d -path ${imagedir}/${test_image}.png
+