ENH: surfaceFeatureExtract: new syntax for non-manifold edges

applications/utilities/surface/surfaceFeatureExtract/surfaceFeatureExtract.C

@@ -721,16 +721,34 @@ int main(int argc, char *argv[])
                 deleteBox(surf, bb, true, edgeStat);
             }
 
-            const Switch manifoldEdges =
+            const Switch nonManifoldEdges =
-                subsetDict.lookupOrDefault<Switch>("manifoldEdges", "no");
+                subsetDict.lookupOrDefault<Switch>("nonManifoldEdges", "yes");
 
-            if (manifoldEdges)
+            if (!nonManifoldEdges)
             {
-                Info<< "Removing all non-manifold edges" << endl;
+                Info<< "Removing all non-manifold edges"
+                    << " (edges with > 2 connected faces)" << endl;
 
                 forAll(edgeStat, edgeI)
                 {
-                    if (surf.edgeFaces()[edgeI].size() != 2)
+                    if (surf.edgeFaces()[edgeI].size() > 2)
+                    {
+                        edgeStat[edgeI] = surfaceFeatures::NONE;
+                    }
+                }
+            }
+
+            const Switch openEdges =
+                subsetDict.lookupOrDefault<Switch>("openEdges", "yes");
+
+            if (!openEdges)
+            {
+                Info<< "Removing all open edges"
+                    << " (edges with 1 connected face)" << endl;
+
+                forAll(edgeStat, edgeI)
+                {
+                    if (surf.edgeFaces()[edgeI].size() == 1)
                     {
                         edgeStat[edgeI] = surfaceFeatures::NONE;
                     }

applications/utilities/surface/surfaceFeatureExtract/surfaceFeatureExtractDict

@@ -59,15 +59,21 @@ surface2.nas
     {
         // Use a plane to select feature edges
         // (normal)(basePoint)
+        // Keep only edges that intersect the plane will be included
         plane               (1 0 0)(0 0 0);
 
         // Select feature edges using a box
         // (minPt)(maxPt)
+        // Keep edges inside the box:
         insideBox           (0 0 0)(1 1 1);
+        // Keep edges outside the box:
         outsideBox          (0 0 0)(1 1 1);
 
-        // Remove any non-manifold (open or > 2 connected faces) edges
+        // Keep nonManifold edges (edges with >2 connected faces)
-        manifoldEdges       no;
+        nonManifoldEdges       yes;
+
+        // Keep open edges (edges with 1 connected face)
+        openEdges       yes;
     }
 
     addFeatures

tutorials/incompressible/simpleFoam/motorBike/system/surfaceFeatureExtractDict

@@ -0,0 +1,48 @@
+/*--------------------------------*- C++ -*----------------------------------*\
+| =========                 |                                                 |
+| \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox           |
+|  \\    /   O peration     | Version:  dev                                   |
+|   \\  /    A nd           | Web:      www.OpenFOAM.org                      |
+|    \\/     M anipulation  |                                                 |
+\*---------------------------------------------------------------------------*/
+FoamFile
+{
+    version     2.0;
+    format      ascii;
+    class       dictionary;
+    object      surfaceFeatureExtractDict;
+}
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+motorBike.obj
+{
+    // How to obtain raw features (extractFromFile || extractFromSurface)
+    extractionMethod    extractFromSurface;
+
+    extractFromSurfaceCoeffs
+    {
+        // Mark edges whose adjacent surface normals are at an angle less
+        // than includedAngle as features
+        // - 0  : selects no edges
+        // - 180: selects all edges
+        includedAngle   150;
+    }
+
+    subsetFeatures
+    {
+        // Keep nonManifold edges (edges with >2 connected faces)
+        nonManifoldEdges       no;
+
+        // Keep open edges (edges with 1 connected face)
+        openEdges       yes;
+    }
+
+
+    // Write options
+
+        // Write features to obj format for postprocessing
+        writeObj                yes;
+}
+
+
+// ************************************************************************* //