0031601: Modeling Algorithms - BRepOffset_Tool Segmentation Fault

Added protection against null pointer dereferencing.
Modified BRepOffset_MakeOffset::MakeThickSolid method.
Fixed the problem with negative volume values.
Fixed several unit tests and added a new one.

tests/bugs/modalg_2/bug427_6

@@ -1,8 +1,3 @@
-puts "TODO OCC23068 ALL: ERROR. offsetperform operation not done."
-puts "TODO OCC23068 ALL: result is not a topological shape!!!"
-puts "TODO OCC23068 ALL: Error: The command cannot be built"
-puts "TODO OCC23068 ALL: TEST INCOMPLETE"
-
 puts "========================"
 puts " OCC427 "
 puts "(case 6)"

tests/bugs/modalg_2/bug5805_18

@@ -1,8 +1,4 @@
-puts "TODO OCC25925 ALL: ERROR. offsetperform operation not done."
-puts "TODO OCC25925 ALL: Error: The command cannot be built"
-puts "TODO OCC25925 ALL: Faulty OCC5805 : result is not Closed shape"
-puts "TODO OCC25925 ALL: TEST INCOMPLETE"
-puts "TODO OCC25925 ALL: Tcl Exception: Error : command \\\"nbshapes result\\\" gives an empty result"
+puts "TODO OCC25925 ALL: Error : The area of result shape is"
 
 puts "============"
 puts "OCC5805"
@@ -52,6 +48,6 @@ if {$index == -1} {
   
 }
 
-checknbshapes result -t -wire 5 -face 5 -shell 2 -solid 1
+checknbshapes result -t -wire 3 -face 3 -shell 1 -solid 1
 
 checkview -display result -2d -path ${imagedir}/${test_image}.png

tests/bugs/modalg_2/bug5805_19

@@ -1,8 +1,4 @@
-puts "TODO OCC25925 ALL: Faulty OCC5805 : result is not Closed shape"
-puts "TODO OCC25925 ALL: ERROR. offsetperform operation not done."
-puts "TODO OCC25925 ALL: Tcl Exception: Error : command \\\"nbshapes result\\\" gives an empty result"
-puts "TODO OCC25925 ALL: Error: The command cannot be built"
-puts "TODO OCC25925 ALL: TEST INCOMPLETE"
+puts "TODO OCC25925 ALL: Error : The area of result shape is"
 
 puts "============"
 puts "OCC5805"
@@ -53,6 +49,6 @@ if {$index == -1} {
   
 }
 
-checknbshapes result -vertex 2 -edge 3 -wire 3 -face 3 -shell 1 -solid 1 -compsolid 0 -compound 0 -shape 13
+checknbshapes result -vertex 1 -edge 2 -wire 3 -face 3 -shell 1 -solid 1 -compsolid 0 -compound 0 -shape 11
 
 checkview -display result -2d -path ${imagedir}/${test_image}.png

tests/bugs/modalg_2/bug5805_20

@@ -1,8 +1,4 @@
-puts "TODO OCC25925 ALL: Faulty OCC5805 : result is not Closed shape"
-puts "TODO OCC25925 ALL: ERROR. offsetperform operation not done."
-puts "TODO OCC25925 ALL: Tcl Exception: Error : command \\\"nbshapes result\\\" gives an empty result"
-puts "TODO OCC25925 ALL: Error: The command cannot be built"
-puts "TODO OCC25925 ALL: TEST INCOMPLETE"
+puts "TODO OCC25925 ALL: Error : The area of result shape is"
 
 puts "============"
 puts "OCC5805"
@@ -53,6 +49,6 @@ if {$index == -1} {
   
 }
 
-checknbshapes result -vertex 2 -edge 3 -wire 3 -face 3 -shell 1 -solid 1 -compsolid 0 -compound 0 -shape 13
+checknbshapes result -vertex 1 -edge 2 -wire 3 -face 3 -shell 1 -solid 1 -compsolid 0 -compound 0 -shape 11
 
 checkview -display result -2d -path ${imagedir}/${test_image}.png

tests/bugs/modalg_2/bug5805_42

@@ -1,6 +1,4 @@
-puts "TODO OCC25925 ALL: Faulty OCC5805 : result is not Closed shape"
-puts "TODO OCC25925 ALL: ERROR. offsetperform operation not done."
-puts "TODO OCC25925 ALL: Error: The command cannot be built"
+puts "TODO OCC25925 ALL: Error : The area of result shape is"
 
 puts "============"
 puts "OCC5805"

tests/bugs/modalg_2/bug5805_43

@@ -1,7 +1,4 @@
-puts "TODO OCC23068 ALL: ERROR. offsetperform operation not done."
-puts "TODO OCC25925 ALL: Error: The command cannot be built"
-puts "TODO OCC25925 ALL: Tcl Exception: result is not a topological shape"
-puts "TODO OCC25925 ALL: TEST INCOMPLETE"
+puts "TODO OCC25925 ALL: Error : The area of result shape is"
 
 puts "============"
 puts "OCC5805"

tests/bugs/modalg_2/bug5805_44

@@ -1,8 +1,4 @@
-puts "TODO OCC25925 ALL: Faulty OCC5805 : result is not Closed shape"
-puts "TODO OCC25925 ALL: ERROR. offsetperform operation not done."
-puts "TODO OCC25925 ALL: Tcl Exception: Error : command \\\"nbshapes result\\\" gives an empty result"
-puts "TODO OCC25925 ALL: Error: The command cannot be built"
-puts "TODO OCC25925 ALL: TEST INCOMPLETE"
+puts "TODO OCC25925 ALL: Error : The area of result shape is"
 
 puts "============"
 puts "OCC5805"

tests/bugs/modalg_7/bug25395_1

@@ -1,5 +1,3 @@
-puts "TODO OCC25395 ALL: ERROR. offsetperform operation not done."
-
 puts "========"
 puts "OCC25395"
 puts "========"

tests/bugs/modalg_7/bug25939

@@ -1,5 +1,3 @@
-puts "TODO OCC25939 ALL: An exception was caught"
-
 puts "============"
 puts "0025939: S I G S E G V in MakeThickSolid"
 puts "============"

tests/bugs/modalg_7/bug31845_f

@@ -1,5 +1,3 @@
-puts "TODO OCC31845 All: ERROR. offsetperform operation not done."
-
 puts "============================================"
 puts "OCC31845: BRepOffsetAPI_MakeThickSolid fails"
 puts "============================================"

tests/bugs/modalg_7/bug31845_i

@@ -1,5 +1,3 @@
-puts "TODO OCC31845 All: ERROR. offsetperform operation not done."
-
 puts "============================================"
 puts "OCC31845: BRepOffsetAPI_MakeThickSolid fails"
 puts "============================================"

tests/bugs/modalg_8/bug31601

@@ -0,0 +1,15 @@
+puts "================================================================="
+puts "0031601: Modeling Algorithms - BRepOffset_Tool Segmentation Fault"
+puts "================================================================="
+puts ""
+
+pload MODELING
+box b 50 50 10
+explode b E
+compound b_1 b_2 b_3 b_4 b_5 b_6 b_7 b_8 b_9 b_10 b_11 b_12 c
+fillet s b 4 c
+explode s F
+offsetparameter 1.e-7 c a
+offsetload s 1 s_11
+offsetperform r
+checkview -display r -2d -path ${imagedir}/${test_image}.png