cad/gmsh: chase CGNS 4.5.0

Patch 20c318a4 from upstream.

Obtained from:	https://gitlab.onelab.info/gmsh/gmsh/-/commit/20c318a4b945a3c7086a3a95b7bb4b56f2a5029e

1 files changed, 110 insertions, 0 deletions

diff --git a/cad/gmsh/files/patch-contrib_domhex_BackgroundMesh2D.cpp b/cad/gmsh/files/patch-contrib_domhex_BackgroundMesh2D.cpp
new file mode 100644
index 000000000000..2863634a8f85
--- /dev/null
+++ b/cad/gmsh/files/patch-contrib_domhex_BackgroundMesh2D.cpp
@@ -0,0 +1,110 @@
+--- contrib/domhex/BackgroundMesh2D.cpp.orig	2024-03-29 22:06:54 UTC
++++ contrib/domhex/BackgroundMesh2D.cpp
+@@ -490,9 +490,9 @@ void frameFieldBackgroundMesh2D::computeCrossField(
+         v[1] = (*it)->lines[i]->getVertex(1);
+         SPoint2 p1, p2;
+         reparamMeshEdgeOnFace(v[0], v[1], face, p1, p2);
+-        Pair<SVector3, SVector3> der = face->firstDer((p1 + p2) * .5);
+-        SVector3 t1 = der.first();
+-        SVector3 t2 = der.second();
++        std::pair<SVector3, SVector3> der = face->firstDer((p1 + p2) * .5);
++        SVector3 t1 = der.first;
++        SVector3 t2 = der.second;
+         SVector3 n = crossprod(t1, t2);
+         n.normalize();
+         SVector3 d1(v[1]->x() - v[0]->x(), v[1]->y() - v[0]->y(),
+@@ -534,21 +534,21 @@ void frameFieldBackgroundMesh2D::eval_crossfield(doubl
+                                                  STensor3 &cf)
+ {
+   double quadAngle = angle(u, v);
+-  Pair<SVector3, SVector3> dirs =
++  std::pair<SVector3, SVector3> dirs =
+     compute_crossfield_directions(u, v, quadAngle);
+-  SVector3 n = crossprod(dirs.first(), dirs.second());
++  SVector3 n = crossprod(dirs.first, dirs.second);
+ 
+   for(int i = 0; i < 3; i++) {
+-    cf(i, 0) = dirs.first()[i];
+-    cf(i, 1) = dirs.second()[i];
++    cf(i, 0) = dirs.first[i];
++    cf(i, 1) = dirs.second[i];
+     cf(i, 2) = n[i];
+   }
+ 
+   //  SVector3 t1,t2,n;
+   //  GFace *face = dynamic_cast<GFace*>(gf);
+-  //  Pair<SVector3, SVector3> der = face->firstDer(SPoint2(u,v));
+-  //  SVector3 s1 = der.first();
+-  //  SVector3 s2 = der.second();
++  //  std::pair<SVector3, SVector3> der = face->firstDer(SPoint2(u,v));
++  //  SVector3 s1 = der.first;
++  //  SVector3 s2 = der.second;
+   //  n = crossprod(s1,s2);
+   //  n.normalize();
+   //  s1.normalize();
+@@ -642,12 +642,12 @@ void frameFieldBackgroundMesh2D::exportCrossField(cons
+     double angle_current = angle(v);
+     GPoint p = get_GPoint_from_MVertex(v);
+     for(int i = 0; i < 2; i++) {
+-      Pair<SVector3, SVector3> dirs = compute_crossfield_directions(
++      std::pair<SVector3, SVector3> dirs = compute_crossfield_directions(
+         v->x(), v->y(), angle_current + deltas[i]);
+       fprintf(f, "VP(%g,%g,%g) {%g,%g,%g};\n", p.x(), p.y(), p.z(),
+-              dirs.first()[0], dirs.first()[1], dirs.first()[2]);
++              dirs.first[0], dirs.first[1], dirs.first[2]);
+       fprintf(f, "VP(%g,%g,%g) {%g,%g,%g};\n", p.x(), p.y(), p.z(),
+-              dirs.second()[0], dirs.second()[1], dirs.second()[2]);
++              dirs.second[0], dirs.second[1], dirs.second[2]);
+     }
+   }
+   fprintf(f, "};\n");
+@@ -656,7 +656,7 @@ void frameFieldBackgroundMesh2D::exportCrossField(cons
+ 
+ // returns the cross field as a pair of othogonal vectors (NOT in parametric
+ // coordinates, but real 3D coordinates)
+-Pair<SVector3, SVector3>
++std::pair<SVector3, SVector3>
+ frameFieldBackgroundMesh2D::compute_crossfield_directions(double u, double v,
+                                                           double angle_current)
+ {
+@@ -664,12 +664,12 @@ frameFieldBackgroundMesh2D::compute_crossfield_directi
+   GFace *face = dynamic_cast<GFace *>(gf);
+   if(!face) {
+     Msg::Error("Entity is not a face in background mesh");
+-    return Pair<SVector3, SVector3>(SVector3(), SVector3());
++    return std::pair<SVector3, SVector3>(SVector3(), SVector3());
+   }
+ 
+-  Pair<SVector3, SVector3> der = face->firstDer(SPoint2(u, v));
+-  SVector3 s1 = der.first();
+-  SVector3 s2 = der.second();
++  std::pair<SVector3, SVector3> der = face->firstDer(SPoint2(u, v));
++  SVector3 s1 = der.first;
++  SVector3 s2 = der.second;
+   SVector3 n = crossprod(s1, s2);
+   n.normalize();
+ 
+@@ -687,8 +687,8 @@ frameFieldBackgroundMesh2D::compute_crossfield_directi
+   SVector3 t2 = crossprod(n, t1);
+   t2.normalize();
+ 
+-  return Pair<SVector3, SVector3>(SVector3(t1[0], t1[1], t1[2]),
+-                                  SVector3(t2[0], t2[1], t2[2]));
++  return std::pair<SVector3, SVector3>(SVector3(t1[0], t1[1], t1[2]),
++                                       SVector3(t2[0], t2[1], t2[2]));
+ }
+ 
+ bool frameFieldBackgroundMesh2D::compute_RK_infos(double u, double v, double x,
+@@ -711,9 +711,9 @@ bool frameFieldBackgroundMesh2D::compute_RK_infos(doub
+     return false;
+   }
+ 
+-  Pair<SVector3, SVector3> der = face->firstDer(SPoint2(u, v));
+-  SVector3 s1 = der.first();
+-  SVector3 s2 = der.second();
++  std::pair<SVector3, SVector3> der = face->firstDer(SPoint2(u, v));
++  SVector3 s1 = der.first;
++  SVector3 s2 = der.second;
+   SVector3 n = crossprod(s1, s2);
+   n.normalize();
+   SVector3 basis_u = s1;