From 31cf9c5f7dd2cdc19db053ec246f32ac61f7a09a Mon Sep 17 00:00:00 2001
From: aml <aml@opencascade.com>
Date: Thu, 4 Sep 2014 13:59:05 +0400
Subject: [PATCH] 0025199: Bad tolerance edge generated by blend algorithm

Fixed incorrect surface borders computing.

Test cases for issue CR25199
---
 src/GeomInt/GeomInt_IntSS_1.cxx |  5 ++++-
 tests/bugs/modalg_5/bug25199    | 26 ++++++++++++++++++++++++++
 2 files changed, 30 insertions(+), 1 deletion(-)
 create mode 100755 tests/bugs/modalg_5/bug25199

diff --git a/src/GeomInt/GeomInt_IntSS_1.cxx b/src/GeomInt/GeomInt_IntSS_1.cxx
index b5e07242ce..609cda12a5 100644
--- a/src/GeomInt/GeomInt_IntSS_1.cxx
+++ b/src/GeomInt/GeomInt_IntSS_1.cxx
@@ -1558,7 +1558,10 @@ Standard_Boolean DecompositionOfWLine(const Handle(IntPatch_WLine)& theWLine,
 
 	Handle(GeomAdaptor_HSurface) aGASurface = (!surfit) ? theSurface1 : theSurface2;
 	
-	aGASurface->ChangeSurface().Surface()->Bounds(umin, umax, vmin, vmax);
+        umin = aGASurface->FirstUParameter();
+        umax = aGASurface->LastUParameter();
+        vmin = aGASurface->FirstVParameter();
+        vmax = aGASurface->LastVParameter();
 	Standard_Real U=0., V=0.;
 
 	if(!surfit) {
diff --git a/tests/bugs/modalg_5/bug25199 b/tests/bugs/modalg_5/bug25199
new file mode 100755
index 0000000000..e5b9e21c9d
--- /dev/null
+++ b/tests/bugs/modalg_5/bug25199
@@ -0,0 +1,26 @@
+puts "============"
+puts "OCC25199"
+puts "============"
+puts ""
+###############################################################################################
+# Bad tolerance edge generated by blend algorithm
+###############################################################################################
+
+decho off
+test bugs modalg_3 bug615
+decho on
+
+explode result E
+
+regexp {Tolerance +MAX=([-0-9.+eE]+)} [tolerance result_21] full MaxTol_1
+
+puts "MaxTolerance = $MaxTol_1"
+
+set MaxTol 0.001
+
+if { $MaxTol_1 > $MaxTol } {
+    puts "Faulty OCC25199:  Bad tolerance edge generated by blend algorithm"
+} else {
+    puts "OCC25199 OK:  Good tolerance edge generated by blend algorithm"
+}
+