ENH: triSurfaceSearch: findLineAll returns 1 hit if line goes through a surface point

src/meshTools/triSurface/triSurfaceSearch/triSurfaceSearch.C

@@ -54,6 +54,29 @@ bool Foam::triSurfaceSearch::checkUniqueHit
     if (nearType == 1)
     {
         // near point
+
+        const label nearPointI = f[nearLabel];
+
+        const labelList& pointFaces =
+            surface().pointFaces()[surface().meshPointMap()[nearPointI]];
+
+        forAll(pointFaces, pI)
+        {
+            const label pointFaceI = pointFaces[pI];
+
+            if (pointFaceI != currHit.index())
+            {
+                forAll(hits, hI)
+                {
+                    const pointIndexHit& hit = hits[hI];
+
+                    if (hit.index() == pointFaceI)
+                    {
+                        return false;
+                    }
+                }
+            }
+        }
     }
     else if (nearType == 2)
     {

src/meshTools/triSurface/triSurfaceSearch/triSurfaceSearch.H

@@ -74,6 +74,9 @@ class triSurfaceSearch
 
         //- Check whether the current hit on the surface which lies on lineVec
         //  is unique.
+        //  point : return 1 unique hit
+        //  edge  : return 1 hit if in the cone of the edge faces
+        //        : return 2 hits if outside or on the cone.
         bool checkUniqueHit
         (
             const pointIndexHit& currHit,