[netbuilder] generated shapes are no fragments

According to the OCC docu, generated shapes are only those that do not
have the same dimension as the shapes participating in a boolean
operation. Thus, inserting them as fragments here leads to errors in the brep
writer and is not what we want. In OCC7.5 this fails while OCC7.3 did
not have issues with this for some reason.

frackit/entitynetwork/networkbuilder.hh

@@ -255,18 +255,12 @@ protected:
 
                 // map all fragments to this new index
                 const bool isDeleted = intersection.IsDeleted(entityShape);
-                const auto& generated = intersection.Generated(entityShape);
                 const auto& modified = intersection.Modified(entityShape);
-                if (!isDeleted && generated.IsEmpty() && modified.IsEmpty())
+                if (!isDeleted && modified.IsEmpty())
                 {
                     newIndexMap.Bind(entityShape, entityIdx);
                     newList.Append(entityShape);
                 }
-                for (const auto& fragment : generated)
-                {
-                    if (!newIndexMap.IsBound(fragment)) newIndexMap.Bind(fragment, entityIdx);
-                    if (!newList.Contains(fragment)) newList.Append(fragment);
-                }
                 for (const auto& fragment : modified)
                 {
                     if (!newIndexMap.IsBound(fragment)) newIndexMap.Bind(fragment, entityIdx);
@@ -348,20 +342,14 @@ protected:
 
             // map all fragments to this new index
             const bool isDeleted = fragmentAlgo.IsDeleted(shape);
-            const auto& generated = fragmentAlgo.Generated(shape);
             const auto& modified = fragmentAlgo.Modified(shape);
             auto& newList = newFragmentLists[subDomainIdx];
             auto& newMap = newFragmentMaps[subDomainIdx];
-            if (!isDeleted && generated.IsEmpty() && modified.IsEmpty())
+            if (!isDeleted && modified.IsEmpty())
             {
                 newMap.Bind(shape, entityIdx);
                 newList.Append(shape);
             }
-            for (const auto& fragment : generated)
-            {
-                if (!newMap.IsBound(fragment)) newMap.Bind(fragment, entityIdx);
-                if (!newList.Contains(fragment)) newList.Append(fragment);
-            }
             for (const auto& fragment : modified)
             {
                 if (!newMap.IsBound(fragment)) newMap.Bind(fragment, entityIdx);
@@ -385,15 +373,11 @@ protected:
 
             // store the fragments of this sub-domain
             const bool isDeleted = fragmentAlgo.IsDeleted(domainShape);
-            const auto& generated = fragmentAlgo.Generated(domainShape);
             const auto& modified = fragmentAlgo.Modified(domainShape);
 
             auto& sdFragmentList = subDomainFragmentLists_[subDomainIdx];
-            if (!isDeleted && generated.IsEmpty() && modified.IsEmpty())
+            if (!isDeleted && modified.IsEmpty())
                 sdFragmentList.Append(domainShape);
-            for (const auto& fragment : generated)
-                if (!sdFragmentList.Contains(fragment))
-                    sdFragmentList.Append(fragment);
             for (const auto& fragment : modified)
                 if (!sdFragmentList.Contains(fragment))
                     sdFragmentList.Append(fragment);