From e5b544e02b979eab5d4fbf46815a60fd76ed6ca6 Mon Sep 17 00:00:00 2001
From: Matthias Hochsteger <mhochsteger@cerbsim.com>
Date: Fri, 23 Feb 2024 15:49:11 +0100
Subject: [PATCH] Don't optimize when goal==OPT_LEGAL and all affected elements
 are legal

---
 libsrc/meshing/improve3.cpp |  38 +-
 tests/pytest/results.json   | 984 ++++++++++++++++++------------------
 2 files changed, 506 insertions(+), 516 deletions(-)

diff --git a/libsrc/meshing/improve3.cpp b/libsrc/meshing/improve3.cpp
index cdfa2295..8bbbdd02 100644
--- a/libsrc/meshing/improve3.cpp
+++ b/libsrc/meshing/improve3.cpp
@@ -23,6 +23,14 @@ static inline bool NotTooBad(double bad1, double bad2)
          (bad2 <= 1e8);
 }
 
+bool CheckAllLegal(Mesh & mesh, FlatArray<ElementIndex> els)
+  {
+    for(auto ei : els)
+      if(!mesh.LegalTet(mesh[ei]))
+        return false;
+    return true;
+  }
+
 // Calc badness of new element where pi1 and pi2 are replaced by pnew
 double CalcBadReplacePoints (const Mesh::T_POINTS & points, const MeshingParameters & mp, const Element & elem, double h, PointIndex &pi1, PointIndex &pi2, MeshPoint &pnew)
   {
@@ -418,15 +426,8 @@ double MeshOptimize3d :: SplitImproveEdge (Mesh & mesh, OPTIMIZEGOAL goal, Table
           if(mp.only3D_domain_nr != mesh[ei].GetIndex())
               return 0.0;
 
-  if (goal == OPT_LEGAL)
-    {
-      bool all_tets_legal = true;
-      for(auto ei : hasbothpoints)
-          if( !mesh.LegalTet (mesh[ei]) || elerrs[ei] > 1e3)
-              all_tets_legal = false;
-      if(all_tets_legal)
-          return 0.0;
-    }
+  if ((goal == OPT_LEGAL) && CheckAllLegal(mesh, hasbothpoints))
+    return 0.0;
 
   double bad1 = 0.0;
   double bad1_max = 0.0;
@@ -706,8 +707,6 @@ double MeshOptimize3d :: SwapImproveEdge (Mesh & mesh, OPTIMIZEGOAL goal,
         }
     }
 
-  bool have_bad_element = false;
-
   for (ElementIndex ei : hasbothpoints)
     {
       if (mesh[ei].GetType () != TET)
@@ -727,14 +726,9 @@ double MeshOptimize3d :: SwapImproveEdge (Mesh & mesh, OPTIMIZEGOAL goal,
 
       if (mesh[ei].IsDeleted())
           return 0.0;
-
-      if ((goal == OPT_LEGAL) &&
-              mesh.LegalTet (mesh[ei]) &&
-              CalcBad (mesh.Points(), mesh[ei], 0) >= 1e3)
-          have_bad_element = true;
     }
 
-  if ((goal == OPT_LEGAL) && !have_bad_element)
+  if ((goal == OPT_LEGAL) && CheckAllLegal(mesh, hasbothpoints))
     return 0.0;
 
   int nsuround = hasbothpoints.Size();
@@ -831,7 +825,7 @@ double MeshOptimize3d :: SwapImproveEdge (Mesh & mesh, OPTIMIZEGOAL goal,
           bad2 += 1e4;
 
 
-      if (goal == OPT_CONFORM && NotTooBad(bad1, bad2))
+      if ((goal == OPT_CONFORM) && NotTooBad(bad1, bad2))
         {
           INDEX_3 face(pi3, pi4, pi5);
           face.Sort();
@@ -1517,9 +1511,7 @@ void MeshOptimize3d :: SwapImproveSurface (Mesh & mesh, OPTIMIZEGOAL goal,
       if (mesh[ei].IsDeleted())
 	continue;
 
-      if ((goal == OPT_LEGAL) && 
-	  mesh.LegalTet (mesh[ei]) &&
-	  CalcBad (mesh.Points(), mesh[ei], 0) < 1e3)
+      if (goal == OPT_LEGAL && mesh.LegalTet (mesh[ei]))
 	continue;
 
       const Element & elemi = mesh[ei];
@@ -2510,9 +2502,7 @@ void MeshOptimize3d :: SwapImprove2 (Mesh & mesh, OPTIMIZEGOAL goal)
             if (mesh[eli1].GetType() != TET)
               continue;
 
-            if ((goal == OPT_LEGAL) &&
-                mesh.LegalTet (mesh[eli1]) &&
-                CalcBad (mesh.Points(), mesh[eli1], 0) < 1e3)
+            if (goal == OPT_LEGAL && mesh.LegalTet (mesh[eli1]))
               continue;
 
             if(mesh.GetDimension()==3 && mp.only3D_domain_nr && mp.only3D_domain_nr != mesh.VolumeElement(eli1).GetIndex())
diff --git a/tests/pytest/results.json b/tests/pytest/results.json
index 3cdc607c..5d5af071 100644
--- a/tests/pytest/results.json
+++ b/tests/pytest/results.json
@@ -118,13 +118,13 @@
             ],
             "ne1d": 94,
             "ne2d": 108,
-            "ne3d": 112,
-            "quality_histogram": "[0, 0, 0, 0, 0, 1, 4, 5, 15, 14, 6, 14, 6, 10, 7, 10, 3, 15, 2, 0]",
-            "total_badness": 200.73145455
+            "ne3d": 111,
+            "quality_histogram": "[0, 0, 0, 0, 1, 1, 2, 5, 13, 15, 5, 14, 6, 11, 7, 11, 3, 15, 2, 0]",
+            "total_badness": 196.5187028
         },
         {
             "angles_tet": [
-                14.751,
+                14.935,
                 158.04
             ],
             "angles_trig": [
@@ -134,8 +134,8 @@
             "ne1d": 136,
             "ne2d": 204,
             "ne3d": 326,
-            "quality_histogram": "[0, 0, 0, 2, 2, 7, 8, 10, 14, 12, 12, 22, 26, 34, 50, 43, 45, 26, 10, 3]",
-            "total_badness": 530.84214658
+            "quality_histogram": "[0, 0, 0, 2, 3, 8, 7, 9, 11, 14, 9, 18, 28, 30, 45, 57, 41, 29, 11, 4]",
+            "total_badness": 526.10466705
         },
         {
             "angles_tet": [
@@ -165,7 +165,7 @@
             "ne2d": 922,
             "ne3d": 3853,
             "quality_histogram": "[0, 0, 0, 0, 0, 0, 0, 0, 1, 3, 15, 42, 118, 219, 455, 671, 787, 798, 574, 170]",
-            "total_badness": 4779.2253231
+            "total_badness": 4779.225323
         },
         {
             "angles_tet": [
@@ -173,14 +173,14 @@
                 143.56
             ],
             "angles_trig": [
-                26.346,
+                26.347,
                 116.86
             ],
             "ne1d": 456,
             "ne2d": 2480,
             "ne3d": 18633,
-            "quality_histogram": "[0, 0, 0, 0, 0, 0, 0, 0, 2, 3, 17, 93, 295, 810, 1622, 2827, 3994, 4471, 3391, 1108]",
-            "total_badness": 22509.04709
+            "quality_histogram": "[0, 0, 0, 0, 0, 0, 0, 0, 2, 3, 17, 90, 298, 808, 1625, 2854, 3990, 4460, 3380, 1106]",
+            "total_badness": 22512.61657
         }
     ],
     "circle_on_cube.geo": [
@@ -197,7 +197,7 @@
             "ne2d": 162,
             "ne3d": 616,
             "quality_histogram": "[0, 0, 0, 0, 0, 0, 0, 0, 4, 13, 15, 36, 61, 59, 78, 112, 98, 85, 43, 12]",
-            "total_badness": 838.94349075
+            "total_badness": 838.94349076
         },
         {
             "angles_tet": [
@@ -272,7 +272,7 @@
             "ne2d": 922,
             "ne3d": 12168,
             "quality_histogram": "[0, 0, 0, 0, 0, 0, 0, 0, 1, 8, 17, 52, 227, 553, 1180, 1901, 2590, 2911, 2091, 637]",
-            "total_badness": 14779.532725
+            "total_badness": 14779.532724
         }
     ],
     "cone.geo": [
@@ -293,33 +293,33 @@
         },
         {
             "angles_tet": [
-                8.3849,
-                167.59
+                9.1858,
+                161.19
             ],
             "angles_trig": [
-                10.826,
-                151.58
+                13.35,
+                149.4
             ],
             "ne1d": 32,
             "ne2d": 208,
-            "ne3d": 486,
-            "quality_histogram": "[0, 0, 1, 4, 5, 16, 34, 28, 32, 34, 49, 35, 37, 42, 39, 42, 26, 28, 26, 8]",
-            "total_badness": 915.87761832
+            "ne3d": 503,
+            "quality_histogram": "[0, 0, 1, 5, 16, 30, 36, 31, 25, 40, 53, 39, 45, 39, 40, 32, 26, 23, 12, 10]",
+            "total_badness": 1031.5095298
         },
         {
             "angles_tet": [
-                7.5064,
-                168.59
+                7.2677,
+                164.69
             ],
             "angles_trig": [
-                9.0552,
-                153.87
+                15.673,
+                144.5
             ],
             "ne1d": 48,
             "ne2d": 420,
-            "ne3d": 618,
-            "quality_histogram": "[0, 0, 4, 11, 7, 17, 9, 23, 39, 60, 71, 85, 85, 55, 56, 27, 42, 19, 8, 0]",
-            "total_badness": 1183.5702625
+            "ne3d": 581,
+            "quality_histogram": "[0, 0, 1, 8, 9, 9, 13, 16, 45, 51, 79, 93, 70, 52, 51, 37, 24, 11, 12, 0]",
+            "total_badness": 1098.0426702
         },
         {
             "angles_tet": [
@@ -364,7 +364,7 @@
             "ne2d": 4738,
             "ne3d": 27128,
             "quality_histogram": "[0, 0, 0, 0, 0, 0, 0, 1, 6, 18, 86, 216, 621, 1451, 2693, 4334, 5762, 5891, 4576, 1473]",
-            "total_badness": 33206.092666
+            "total_badness": 33206.092664
         }
     ],
     "cube.geo": [
@@ -466,14 +466,14 @@
                 170.37
             ],
             "angles_trig": [
-                11.614,
+                11.709,
                 156.34
             ],
             "ne1d": 262,
             "ne2d": 652,
-            "ne3d": 2038,
-            "quality_histogram": "[0, 2, 7, 27, 57, 102, 101, 108, 81, 61, 60, 83, 136, 187, 241, 238, 234, 170, 107, 36]",
-            "total_badness": 3798.8151666
+            "ne3d": 2022,
+            "quality_histogram": "[0, 1, 6, 19, 45, 89, 88, 114, 88, 56, 61, 87, 122, 189, 240, 269, 218, 185, 112, 33]",
+            "total_badness": 3647.7759992
         },
         {
             "angles_tet": [
@@ -487,8 +487,8 @@
             "ne1d": 134,
             "ne2d": 142,
             "ne3d": 205,
-            "quality_histogram": "[0, 0, 0, 0, 0, 1, 0, 1, 0, 3, 7, 17, 26, 37, 30, 28, 34, 15, 2, 4]",
-            "total_badness": 293.89415407
+            "quality_histogram": "[0, 0, 0, 0, 0, 1, 0, 1, 0, 3, 7, 17, 27, 33, 33, 29, 33, 15, 2, 4]",
+            "total_badness": 293.69952154
         },
         {
             "angles_tet": [
@@ -502,8 +502,8 @@
             "ne1d": 190,
             "ne2d": 242,
             "ne3d": 501,
-            "quality_histogram": "[0, 0, 0, 0, 2, 0, 0, 5, 4, 14, 39, 54, 41, 82, 64, 82, 54, 37, 23, 0]",
-            "total_badness": 745.18627676
+            "quality_histogram": "[0, 0, 0, 0, 2, 0, 1, 5, 4, 14, 39, 50, 43, 83, 64, 82, 54, 37, 23, 0]",
+            "total_badness": 745.75340705
         },
         {
             "angles_tet": [
@@ -516,39 +516,39 @@
             ],
             "ne1d": 262,
             "ne2d": 652,
-            "ne3d": 1894,
-            "quality_histogram": "[0, 2, 5, 20, 38, 79, 95, 106, 70, 32, 41, 60, 94, 145, 217, 266, 250, 198, 121, 55]",
-            "total_badness": 3344.7627877
+            "ne3d": 1909,
+            "quality_histogram": "[0, 1, 6, 13, 29, 82, 74, 105, 72, 29, 46, 70, 118, 172, 204, 234, 260, 210, 139, 45]",
+            "total_badness": 3287.5061824
         },
         {
             "angles_tet": [
-                21.707,
-                139.77
+                21.825,
+                139.42
             ],
             "angles_trig": [
-                23.443,
-                118.77
+                25.306,
+                118.65
             ],
             "ne1d": 378,
             "ne2d": 1360,
-            "ne3d": 7586,
-            "quality_histogram": "[0, 0, 0, 0, 0, 0, 0, 0, 1, 9, 46, 126, 290, 603, 925, 1250, 1521, 1436, 1062, 317]",
-            "total_badness": 9530.8442156
+            "ne3d": 7644,
+            "quality_histogram": "[0, 0, 0, 0, 0, 0, 0, 0, 2, 7, 41, 121, 305, 587, 951, 1273, 1531, 1463, 1031, 332]",
+            "total_badness": 9598.9374464
         },
         {
             "angles_tet": [
-                23.791,
-                144.45
+                24.652,
+                141.0
             ],
             "angles_trig": [
-                26.716,
-                123.99
+                26.306,
+                124.41
             ],
             "ne1d": 624,
             "ne2d": 3860,
-            "ne3d": 38096,
-            "quality_histogram": "[0, 0, 0, 0, 0, 0, 0, 1, 2, 26, 61, 218, 722, 1809, 3652, 6020, 8063, 8757, 6666, 2099]",
-            "total_badness": 46320.985555
+            "ne3d": 38125,
+            "quality_histogram": "[0, 0, 0, 0, 0, 0, 0, 0, 2, 22, 82, 236, 702, 1857, 3663, 6067, 8006, 8696, 6671, 2121]",
+            "total_badness": 46389.480456
         }
     ],
     "cubeandspheres.geo": [
@@ -640,7 +640,7 @@
             "ne2d": 906,
             "ne3d": 1041,
             "quality_histogram": "[0, 0, 0, 0, 0, 0, 4, 24, 50, 35, 98, 106, 102, 105, 178, 167, 69, 59, 26, 18]",
-            "total_badness": 1617.9736122
+            "total_badness": 1617.9736123
         }
     ],
     "cubemcyl.geo": [
@@ -661,18 +661,18 @@
         },
         {
             "angles_tet": [
-                15.294,
+                14.439,
                 163.36
             ],
             "angles_trig": [
                 13.852,
-                128.58
+                127.91
             ],
             "ne1d": 64,
             "ne2d": 556,
-            "ne3d": 3011,
-            "quality_histogram": "[0, 0, 0, 1, 3, 1, 14, 25, 40, 85, 116, 209, 333, 406, 462, 445, 441, 279, 120, 31]",
-            "total_badness": 4347.4002113
+            "ne3d": 3009,
+            "quality_histogram": "[0, 0, 0, 1, 2, 3, 13, 27, 42, 87, 131, 219, 325, 398, 476, 464, 391, 283, 117, 30]",
+            "total_badness": 4368.0483744
         },
         {
             "angles_tet": [
@@ -717,7 +717,7 @@
             "ne2d": 5460,
             "ne3d": 88820,
             "quality_histogram": "[0, 0, 0, 0, 0, 0, 0, 1, 11, 51, 248, 703, 2183, 5117, 9583, 14386, 18836, 19401, 14091, 4209]",
-            "total_badness": 109216.91549
+            "total_badness": 109216.91548
         },
         {
             "angles_tet": [
@@ -730,15 +730,15 @@
             ],
             "ne1d": 362,
             "ne2d": 15082,
-            "ne3d": 520159,
-            "quality_histogram": "[0, 0, 0, 0, 0, 0, 0, 0, 9, 85, 499, 2149, 7346, 21113, 47200, 79734, 110083, 123828, 97201, 30912]",
-            "total_badness": 627466.22084
+            "ne3d": 520218,
+            "quality_histogram": "[0, 0, 0, 0, 0, 0, 0, 0, 9, 85, 496, 2160, 7382, 21158, 47170, 79795, 110068, 123883, 97144, 30868]",
+            "total_badness": 627579.43599
         }
     ],
     "cubemsphere.geo": [
         {
             "angles_tet": [
-                22.156,
+                22.157,
                 150.39
             ],
             "angles_trig": [
@@ -747,24 +747,24 @@
             ],
             "ne1d": 90,
             "ne2d": 570,
-            "ne3d": 4523,
-            "quality_histogram": "[0, 0, 0, 0, 0, 0, 0, 2, 9, 41, 75, 170, 331, 494, 702, 821, 761, 645, 383, 89]",
-            "total_badness": 6000.2419679
+            "ne3d": 4524,
+            "quality_histogram": "[0, 0, 0, 0, 0, 0, 0, 3, 9, 47, 78, 175, 315, 496, 713, 797, 777, 636, 390, 88]",
+            "total_badness": 6006.2212546
         },
         {
             "angles_tet": [
-                10.055,
-                158.35
+                10.836,
+                151.64
             ],
             "angles_trig": [
-                7.7708,
-                147.23
+                10.838,
+                138.94
             ],
             "ne1d": 44,
             "ne2d": 142,
-            "ne3d": 313,
-            "quality_histogram": "[0, 0, 1, 2, 9, 23, 31, 23, 34, 37, 31, 32, 22, 30, 18, 10, 4, 3, 1, 2]",
-            "total_badness": 701.96510542
+            "ne3d": 330,
+            "quality_histogram": "[0, 0, 0, 4, 15, 18, 21, 37, 33, 24, 39, 40, 29, 20, 23, 11, 7, 5, 4, 0]",
+            "total_badness": 728.64632638
         },
         {
             "angles_tet": [
@@ -783,18 +783,18 @@
         },
         {
             "angles_tet": [
-                24.16,
-                139.58
+                24.166,
+                139.51
             ],
             "angles_trig": [
                 20.668,
-                120.71
+                122.41
             ],
             "ne1d": 90,
             "ne2d": 570,
-            "ne3d": 4315,
-            "quality_histogram": "[0, 0, 0, 0, 0, 0, 0, 0, 1, 12, 36, 65, 214, 404, 593, 811, 842, 765, 470, 102]",
-            "total_badness": 5519.2080716
+            "ne3d": 4304,
+            "quality_histogram": "[0, 0, 0, 0, 0, 0, 0, 0, 1, 12, 33, 83, 198, 407, 568, 809, 873, 756, 456, 108]",
+            "total_badness": 5505.2501642
         },
         {
             "angles_tet": [
@@ -807,9 +807,9 @@
             ],
             "ne1d": 146,
             "ne2d": 1366,
-            "ne3d": 17357,
-            "quality_histogram": "[0, 0, 0, 0, 0, 0, 0, 0, 1, 8, 45, 131, 383, 1002, 1818, 2868, 3691, 3818, 2778, 814]",
-            "total_badness": 21308.513568
+            "ne3d": 17360,
+            "quality_histogram": "[0, 0, 0, 0, 0, 0, 0, 0, 1, 8, 45, 129, 384, 1009, 1811, 2891, 3679, 3823, 2772, 808]",
+            "total_badness": 21317.445825
         },
         {
             "angles_tet": [
@@ -824,7 +824,7 @@
             "ne2d": 4248,
             "ne3d": 112960,
             "quality_histogram": "[0, 0, 0, 0, 0, 0, 0, 0, 2, 17, 100, 493, 1726, 4923, 10719, 17771, 23842, 26353, 20492, 6522]",
-            "total_badness": 136671.30101
+            "total_badness": 136671.30097
         }
     ],
     "cylinder.geo": [
@@ -845,33 +845,33 @@
         },
         {
             "angles_tet": [
-                24.676,
+                22.85,
                 151.98
             ],
             "angles_trig": [
-                24.811,
-                126.7
+                25.237,
+                118.13
             ],
             "ne1d": 24,
             "ne2d": 66,
-            "ne3d": 70,
-            "quality_histogram": "[0, 0, 0, 0, 0, 0, 1, 0, 6, 5, 5, 2, 6, 5, 3, 5, 14, 17, 1, 0]",
-            "total_badness": 105.64076027
+            "ne3d": 75,
+            "quality_histogram": "[0, 0, 0, 0, 0, 0, 1, 1, 6, 8, 3, 4, 3, 9, 4, 5, 10, 19, 2, 0]",
+            "total_badness": 115.49086337
         },
         {
             "angles_tet": [
-                8.4923,
-                161.34
+                8.2259,
+                167.96
             ],
             "angles_trig": [
-                20.122,
-                127.45
+                13.649,
+                142.85
             ],
             "ne1d": 36,
             "ne2d": 152,
-            "ne3d": 358,
-            "quality_histogram": "[0, 0, 1, 0, 0, 2, 5, 11, 21, 19, 22, 22, 31, 29, 35, 39, 57, 37, 17, 10]",
-            "total_badness": 559.67848726
+            "ne3d": 388,
+            "quality_histogram": "[0, 0, 3, 7, 9, 20, 37, 38, 44, 32, 27, 20, 31, 17, 19, 16, 32, 13, 18, 5]",
+            "total_badness": 848.42235771
         },
         {
             "angles_tet": [
@@ -941,14 +941,14 @@
                 163.27
             ],
             "angles_trig": [
-                14.484,
+                14.531,
                 148.23
             ],
             "ne1d": 48,
             "ne2d": 100,
-            "ne3d": 104,
-            "quality_histogram": "[0, 0, 0, 2, 1, 4, 13, 15, 9, 10, 14, 5, 5, 2, 6, 10, 8, 0, 0, 0]",
-            "total_badness": 228.55775864
+            "ne3d": 103,
+            "quality_histogram": "[0, 0, 0, 1, 0, 6, 13, 14, 10, 11, 11, 5, 5, 3, 6, 10, 8, 0, 0, 0]",
+            "total_badness": 223.46243761
         },
         {
             "angles_tet": [
@@ -986,14 +986,14 @@
                 139.3
             ],
             "angles_trig": [
-                25.146,
+                25.16,
                 122.8
             ],
             "ne1d": 248,
             "ne2d": 2810,
-            "ne3d": 17714,
-            "quality_histogram": "[0, 0, 0, 0, 0, 0, 0, 0, 1, 14, 29, 100, 280, 741, 1663, 2724, 3885, 4147, 3098, 1032]",
-            "total_badness": 21466.883949
+            "ne3d": 17691,
+            "quality_histogram": "[0, 0, 0, 0, 0, 0, 0, 0, 1, 15, 30, 101, 284, 760, 1672, 2728, 3882, 4123, 3074, 1021]",
+            "total_badness": 21452.752962
         }
     ],
     "ellipsoid.geo": [
@@ -1014,18 +1014,18 @@
         },
         {
             "angles_tet": [
-                4.4724,
-                169.99
+                3.037,
+                173.45
             ],
             "angles_trig": [
-                9.3765,
-                160.0
+                6.166,
+                164.94
             ],
             "ne1d": 0,
             "ne2d": 156,
-            "ne3d": 536,
-            "quality_histogram": "[0, 13, 28, 52, 60, 66, 49, 44, 44, 37, 27, 35, 22, 18, 13, 9, 7, 6, 6, 0]",
-            "total_badness": 1855.3951762
+            "ne3d": 623,
+            "quality_histogram": "[0, 39, 79, 59, 79, 61, 50, 34, 44, 28, 29, 27, 21, 17, 11, 17, 11, 11, 6, 0]",
+            "total_badness": 2681.6033582
         },
         {
             "angles_tet": [
@@ -1085,14 +1085,14 @@
             "ne2d": 4212,
             "ne3d": 37347,
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