0032882: Modeling Data - Extrema curve/curve cannot find all solutions (OCCT 7.6 backport)

Extrema/Extrema_GenExtCC.gxx - estimation of Lipchitz constant is improved
Extrema_GlobOptFuncCC.cxx - function value is changed

LocOpe/LocOpe_WiresOnShape.cxx - small correction to fix regression

lowalgos/extcc/bug32882 - new test case is added

some test were updated according new behavior of extrema algo

tests/lowalgos/extcc/bug29858_03

@@ -18,11 +18,12 @@ mkcurve c2 e2
 set info [extrema c1 c2]
 
 # Check result
-regexp {Extrema 1 is point : +([-0-9.+eE]+) +([-0-9.+eE]+) +([-0-9.+eE]+)} $info full x y z
-# Point check
-set good_x 0.0
-set good_y 0.070710562195021642
-set good_z -0.65305318986891325
-checkreal "Intersection point x:" ${x} ${good_x} 0.01 0.01
-checkreal "Intersection point y:" ${y} ${good_y} 0.01 0.01
-checkreal "Intersection point z:" ${z} ${good_z} 0.01 0.01
+if {[regexp "ext_1" $info]} {
+  set dist [lindex [length ext_1] end]
+  if { $dist > 1.0e-10 } {
+    puts "Error: Extrema distance is too big"
+  }
+} else {
+  puts "Error: Extrema is not found"
+}
+

tests/lowalgos/extcc/bug32882

@@ -0,0 +1,36 @@
+puts "========"
+puts "OCC32882: Modeling Data - Extrema curve/curve cannot find all solutions"
+puts "========"
+puts ""
+
+
+# Read input
+restore [locate_data_file bug32882.brep] cc
+explode cc
+
+# Extract geometry from topology
+mkcurve c1 cc_1
+mkcurve c2 cc_2
+mkcurve c3 cc_3
+
+# Run extrema c1/c3
+set info [extrema c1 c3]
+
+# Check number of solution
+if { [llength $info] != 3 } {
+   puts "Error: Invalid extrema number in extrema c1-c3 output"
+}
+
+# Check result
+checklength ext_1 -l 2.929642751e-14 -eps .01
+checklength ext_2 -l 3.480934286e-14 -eps .01
+checklength ext_3 -l 3.177643716e-14 -eps .01
+
+# Run extrema c3/c2
+set info [extrema c3 c2]
+# Check number of solutions
+if { [llength $info] != 2 } {
+   puts "Error: Invalid extrema number in extrema c3-c2 output"
+}
+checklength ext_1 -l 5.684341886e-14 -eps .01
+checklength ext_2 -l 2.929642751e-14 -eps .01