ENH: AMIInterpolation - added base for caching of triangulation

src/meshTools/AMIInterpolation/AMIInterpolation/AMIMethod/faceAreaWeightAMI/faceAreaWeightAMI.C

@@ -57,7 +57,7 @@ void Foam::faceAreaWeightAMI<SourcePatch, TargetPatch>::calcAddressing
     boolList mapFlag(nFacesRemaining, true);
 
     // reset starting seed
-    label startSeedI = 0;
+    label startSeedi = 0;
 
     DynamicList<label> nonOverlapFaces;
     do
@@ -91,7 +91,7 @@ void Foam::faceAreaWeightAMI<SourcePatch, TargetPatch>::calcAddressing
         {
             setNextFaces
             (
-                startSeedI,
+                startSeedi,
                 srcFacei,
                 tgtFacei,
                 mapFlag,
@@ -179,7 +179,7 @@ bool Foam::faceAreaWeightAMI<SourcePatch, TargetPatch>::processSourceFace
 template<class SourcePatch, class TargetPatch>
 void Foam::faceAreaWeightAMI<SourcePatch, TargetPatch>::setNextFaces
 (
-    label& startSeedI,
+    label& startSeedi,
     label& srcFacei,
     label& tgtFacei,
     const boolList& mapFlag,
@@ -195,15 +195,12 @@ void Foam::faceAreaWeightAMI<SourcePatch, TargetPatch>::setNextFaces
 
     // set possible seeds for later use
     bool valuesSet = false;
-    forAll(srcNbrFaces, i)
+    for (label faceS: srcNbrFaces)
     {
-        label faceS = srcNbrFaces[i];
-
         if (mapFlag[faceS] && seedFaces[faceS] == -1)
         {
-            forAll(visitedFaces, j)
+            for (label faceT : visitedFaces)
             {
-                label faceT = visitedFaces[j];
                 scalar area = interArea(faceS, faceT);
                 scalar areaTotal = this->srcMagSf_[srcFacei];
 
@@ -234,13 +231,13 @@ void Foam::faceAreaWeightAMI<SourcePatch, TargetPatch>::setNextFaces
     {
         // try to use existing seed
         bool foundNextSeed = false;
-        for (label facei = startSeedI; facei < mapFlag.size(); facei++)
+        for (label facei = startSeedi; facei < mapFlag.size(); facei++)
         {
             if (mapFlag[facei])
             {
                 if (!foundNextSeed)
                 {
-                    startSeedI = facei;
+                    startSeedi = facei;
                     foundNextSeed = true;
                 }
 
@@ -262,13 +259,13 @@ void Foam::faceAreaWeightAMI<SourcePatch, TargetPatch>::setNextFaces
         }
 
         foundNextSeed = false;
-        for (label facei = startSeedI; facei < mapFlag.size(); facei++)
+        for (label facei = startSeedi; facei < mapFlag.size(); facei++)
         {
             if (mapFlag[facei])
             {
                 if (!foundNextSeed)
                 {
-                    startSeedI = facei + 1;
+                    startSeedi = facei + 1;
                     foundNextSeed = true;
                 }
 
@@ -316,7 +313,8 @@ Foam::scalar Foam::faceAreaWeightAMI<SourcePatch, TargetPatch>::interArea
     }
 
     // create intersection object
-    faceAreaIntersect inter(srcPoints, tgtPoints, this->reverseTarget_);
+    bool cache = true;
+    faceAreaIntersect inter(srcPoints, tgtPoints, this->reverseTarget_, cache);
 
     // crude resultant norm
     vector n(-this->srcPatch_.faceNormals()[srcFacei]);
@@ -333,6 +331,8 @@ Foam::scalar Foam::faceAreaWeightAMI<SourcePatch, TargetPatch>::interArea
     if (magN > ROOTVSMALL)
     {
         area = inter.calc(src, tgt, n/magN, this->triMode_);
+        DebugVar(inter.triangles());
+        DebugVar(inter.triangles().size());
     }
     else
     {

src/meshTools/AMIInterpolation/AMIInterpolation/AMIMethod/faceAreaWeightAMI/faceAreaWeightAMI.H

@@ -107,7 +107,7 @@ protected:
             //- Set the source and target seed faces
             virtual void setNextFaces
             (
-                label& startSeedI,
+                label& startSeedi,
                 label& srcFacei,
                 label& tgtFacei,
                 const boolList& mapFlag,

src/meshTools/AMIInterpolation/AMIInterpolation/AMIMethod/partialFaceAreaWeightAMI/partialFaceAreaWeightAMI.C

@@ -30,7 +30,7 @@ License
 template<class SourcePatch, class TargetPatch>
 void Foam::partialFaceAreaWeightAMI<SourcePatch, TargetPatch>::setNextFaces
 (
-    label& startSeedI,
+    label& startSeedi,
     label& srcFacei,
     label& tgtFacei,
     const boolList& mapFlag,
@@ -41,7 +41,7 @@ void Foam::partialFaceAreaWeightAMI<SourcePatch, TargetPatch>::setNextFaces
 {
     faceAreaWeightAMI<SourcePatch, TargetPatch>::setNextFaces
     (
-        startSeedI,
+        startSeedi,
         srcFacei,
         tgtFacei,
         mapFlag,

src/meshTools/AMIInterpolation/AMIInterpolation/AMIMethod/partialFaceAreaWeightAMI/partialFaceAreaWeightAMI.H

@@ -67,7 +67,7 @@ private:
             //- Set the source and target seed faces
             virtual void setNextFaces
             (
-                label& startSeedI,
+                label& startSeedi,
                 label& srcFacei,
                 label& tgtFacei,
                 const boolList& mapFlag,

src/meshTools/AMIInterpolation/faceAreaIntersect/faceAreaIntersect.C

@@ -231,14 +231,14 @@ Foam::scalar Foam::faceAreaIntersect::triangleIntersect
     FixedList<triPoints, 10> workTris2;
     label nWorkTris2 = 0;
 
-    // cut source triangle with all inwards pointing faces of target triangle
+    // Cut source triangle with all inward pointing faces of target triangle
     // - triangles in workTris1 are inside target triangle
 
-    scalar t = sqrt(triArea(src));
+    const scalar t = sqrt(triArea(src));
 
-    // edge 0
+    // Edge 0
     {
-        // cut triangle src with plane and put resulting sub-triangles in
+        // Cut triangle src with plane and put resulting sub-triangles in
         // workTris1 list
 
         scalar s = mag(tgt[1] - tgt[0]);
@@ -251,9 +251,9 @@ Foam::scalar Foam::faceAreaIntersect::triangleIntersect
         return 0.0;
     }
 
-    // edge1
+    // Edge 1
     {
-        // cut workTris1 with plane and put resulting sub-triangles in
+        // Cut workTris1 with plane and put resulting sub-triangles in
         // workTris2 list (re-use tris storage)
 
         scalar s = mag(tgt[2] - tgt[1]);
@@ -272,9 +272,9 @@ Foam::scalar Foam::faceAreaIntersect::triangleIntersect
         }
     }
 
-    // edge2
+    // Edge 2
     {
-        // cut workTris2 with plane and put resulting sub-triangles in
+        // Cut workTris2 with plane and put resulting sub-triangles in
         // workTris1 list (re-use workTris1 storage)
 
         scalar s = mag(tgt[2] - tgt[0]);
@@ -293,11 +293,16 @@ Foam::scalar Foam::faceAreaIntersect::triangleIntersect
         }
         else
         {
-            // calculate area of sub-triangles
+            // Calculate area of sub-triangles
             scalar area = 0.0;
             for (label i = 0; i < nWorkTris1; i++)
             {
                 area += triArea(workTris1[i]);
+
+                if (cacheTriangulation_)
+                {
+                    triangles_.append(workTris1[i]);
+                }
             }
 
             return area;
@@ -312,12 +317,15 @@ Foam::faceAreaIntersect::faceAreaIntersect
 (
     const pointField& pointsA,
     const pointField& pointsB,
-    const bool reverseB
+    const bool reverseB,
+    const bool cacheTriangulation
 )
 :
     pointsA_(pointsA),
     pointsB_(pointsB),
-    reverseB_(reverseB)
+    reverseB_(reverseB),
+    cacheTriangulation_(cacheTriangulation),
+    triangles_(cacheTriangulation ? 10 : 0)
 {}
 
 
@@ -379,8 +387,10 @@ Foam::scalar Foam::faceAreaIntersect::calc
     triangulate(faceA, pointsA_, triMode, trisA);
     triangulate(faceB, pointsB_, triMode, trisB);
 
-    // intersect triangles
+    // Intersect triangles
     scalar totalArea = 0.0;
+    triangles_.clear();
+
     forAll(trisA, tA)
     {
         triPoints tpA = getTriPoints(pointsA_, trisA[tA], false);

src/meshTools/AMIInterpolation/faceAreaIntersect/faceAreaIntersect.H

@@ -79,6 +79,12 @@ private:
         //- Flag to reverse B faces
         const bool reverseB_;
 
+        //- Flag to cache the final triangulation
+        bool cacheTriangulation_;
+
+        //- Final triangulation
+        DynamicList<triPoints> triangles_;
+
 
     // Static data members
 
@@ -146,7 +152,8 @@ public:
         (
             const pointField& pointsA,
             const pointField& pointsB,
-            const bool reverseB = false
+            const bool reverseB = false,
+            const bool cacheTriangulation = false
         );
 
 
@@ -164,6 +171,15 @@ public:
             faceList& faceTris
         );
 
+        //- Const access to the cacheTriangulation flag
+        inline bool cacheTriangulation() const;
+
+        //- Const access to the triangulation
+        inline const DynamicList<triPoints> triangles() const;
+
+        //- Non-const access to the triangulation
+        inline DynamicList<triPoints>& triangles();
+
         //- Return area of intersection of faceA with faceB
         scalar calc
         (

src/meshTools/AMIInterpolation/faceAreaIntersect/faceAreaIntersectI.H

@@ -75,7 +75,9 @@ inline Foam::point Foam::faceAreaIntersect::planeIntersection
     const label posI
 ) const
 {
-    return (d[posI]*t[negI] - d[negI]*t[posI])/(-d[negI] + d[posI]);
+    scalar dp = d[posI];
+    scalar dn = d[negI];
+    return (dp*t[negI] - dn*t[posI])/(-dn + dp);
 }
 
 
@@ -93,4 +95,22 @@ Foam::scalar& Foam::faceAreaIntersect::tolerance()
 }
 
 
+bool Foam::faceAreaIntersect::cacheTriangulation() const
+{
+    return cacheTriangulation_;
+}
+
+
+const Foam::DynamicList<Foam::triPoints>
+Foam::faceAreaIntersect::triangles() const
+{
+    return triangles_;
+}
+
+
+Foam::DynamicList<Foam::triPoints>& Foam::faceAreaIntersect::triangles()
+{
+    return triangles_;
+}
+
 // ************************************************************************* //