From 41ceb9219e2415c02974895c4114250a0b6bcb41 Mon Sep 17 00:00:00 2001
From: Adrian Kummerlaender
Date: Mon, 7 Jan 2019 19:22:13 +0100
Subject: Fix alignment of physical and lattice coupling lines

---
 apps/adrian/poiseuille2d/poiseuille2d.cpp | 49 +++++++++++++++++--------------
 1 file changed, 27 insertions(+), 22 deletions(-)

(limited to 'apps/adrian/poiseuille2d')

diff --git a/apps/adrian/poiseuille2d/poiseuille2d.cpp b/apps/adrian/poiseuille2d/poiseuille2d.cpp
index f160135..f551820 100644
--- a/apps/adrian/poiseuille2d/poiseuille2d.cpp
+++ b/apps/adrian/poiseuille2d/poiseuille2d.cpp
@@ -68,7 +68,7 @@ void prepareGeometry(UnitConverter<T,DESCRIPTOR> const& converter,
   IndicatorCuboid2D<T> outflow(extend, origin);
   superGeometry.rename(1,4,1,outflow);
 
-  IndicatorCuboid2D<T> obstacle(Vector<T,2>{0.2,0.1}, Vector<T,2>{1.25,0.45});
+  IndicatorCuboid2D<T> obstacle(Vector<T,2> {0.2,0.1}, Vector<T,2> {1.25,0.45});
   superGeometry.rename(1,5,obstacle);
 
   // Removes all not needed boundary voxels outside the surface
@@ -327,10 +327,12 @@ class Coupler {
 protected:
   Grid<T,DESCRIPTOR>& _coarse;
   Grid<T,DESCRIPTOR>& _fine;
-  const Vector<T,2> _origin;
-  const Vector<T,2> _extend;
-  const int _coarseSize;
+
+  const int  _coarseSize;
+  const int  _fineSize;
   const bool _vertical;
+
+  Vector<T,2>   _physOrigin;
   Vector<int,3> _coarseOrigin;
   Vector<int,3> _fineOrigin;
 
@@ -358,18 +360,21 @@ public:
   Coupler(Grid<T,DESCRIPTOR>& coarse, Grid<T,DESCRIPTOR>& fine, Vector<T,2> origin, Vector<T,2> extend):
     _coarse(coarse),
     _fine(fine),
-    _origin(origin),
-    _extend(extend),
-    _coarseSize(extend.norm() / coarse.getConverter().getPhysDeltaX()),
+    _coarseSize(floor(extend.norm() / coarse.getConverter().getPhysDeltaX() + 0.5)+1),
+    _fineSize(2*_coarseSize-1),
     _vertical(util::nearZero(extend[0]))
   {
     OLB_ASSERT(util::nearZero(extend[0]) || util::nearZero(extend[1]), "Coupling is only implemented alongside unit vectors");
 
-    std::vector<int> tmp(3,0);
-    _coarse.getCuboidGeometry().getLatticeR(_origin.toStdVector(), tmp);
-    _coarseOrigin = tmp;
-    _fine.getCuboidGeometry().getLatticeR(_origin.toStdVector(), tmp);
-    _fineOrigin = tmp;
+    const auto& coarseGeometry = _coarse.getCuboidGeometry();
+    const auto& fineGeometry   = _fine.getCuboidGeometry();
+
+    Vector<int,3> tmpLatticeOrigin{};
+    coarseGeometry.getLatticeR(origin, tmpLatticeOrigin);
+    _physOrigin = coarseGeometry.getPhysR(tmpLatticeOrigin.toStdVector());
+
+    coarseGeometry.getLatticeR(_physOrigin, _coarseOrigin);
+    fineGeometry.getLatticeR(_physOrigin, _fineOrigin);
   }
 };
 
@@ -390,7 +395,7 @@ public:
     OstreamManager clout(std::cout,"C2F");
     clout << "coarse origin: " << this->_coarseOrigin[0] << " " << this->_coarseOrigin[1] << " " << this->_coarseOrigin[2] << std::endl;
     clout << "fine origin:   " << this->_fineOrigin[0] << " " << this->_fineOrigin[1] << " " << this->_fineOrigin[2] << std::endl;
-    clout << "fine size:   " << 2*this->_coarseSize-1 << std::endl;
+    clout << "fine size:   " << this->_fineSize << std::endl;
   }
 
   void store()
@@ -537,7 +542,7 @@ public:
              );
       const T uSqr = u[0]*u[0] + u[1]*u[1];
 
-      const auto finePos = this->getFineLatticeR(2*(this->_coarseSize-1)-1);
+      const auto finePos = this->getFineLatticeR(this->_fineSize-2);
 
       for (int iPop=0; iPop < DESCRIPTOR<T>::q; ++iPop) {
         const T fneq = order3interpolation(
@@ -670,15 +675,15 @@ int main(int argc, char* argv[])
     residuum);
   timer.start();
 
-  FineCoupler<T,DESCRIPTOR> fineCoupler0(*coarseGrid, *fineGrid, fineOrigin, Vector<T,2>{0,fineExtend[1]+coarseDeltaX});
-  FineCoupler<T,DESCRIPTOR> fineCoupler1(*coarseGrid, *fineGrid, fineOrigin + Vector<T,2>{fineExtend[0],0}, Vector<T,2>{0,fineExtend[1]+coarseDeltaX});
-  FineCoupler<T,DESCRIPTOR> fineCoupler2(*coarseGrid, *fineGrid, fineOrigin + Vector<T,2>(0,fineExtend[1]), Vector<T,2>{fineExtend[0]+coarseDeltaX,0});
-  FineCoupler<T,DESCRIPTOR> fineCoupler3(*coarseGrid, *fineGrid, fineOrigin, Vector<T,2>{fineExtend[0]+coarseDeltaX,0});
+  FineCoupler<T,DESCRIPTOR> fineCoupler0(*coarseGrid, *fineGrid, fineOrigin, Vector<T,2> {0,fineExtend[1]});
+  FineCoupler<T,DESCRIPTOR> fineCoupler1(*coarseGrid, *fineGrid, fineOrigin + Vector<T,2> {fineExtend[0],0}, Vector<T,2> {0,fineExtend[1]});
+  FineCoupler<T,DESCRIPTOR> fineCoupler2(*coarseGrid, *fineGrid, fineOrigin + Vector<T,2>(0,fineExtend[1]), Vector<T,2> {fineExtend[0],0});
+  FineCoupler<T,DESCRIPTOR> fineCoupler3(*coarseGrid, *fineGrid, fineOrigin, Vector<T,2> {fineExtend[0],0});
 
-  CoarseCoupler<T,DESCRIPTOR> coarseCoupler0(*coarseGrid, *fineGrid, fineOrigin + coarseDeltaX, Vector<T,2>{0,fineExtend[1]-2*coarseDeltaX});
-  CoarseCoupler<T,DESCRIPTOR> coarseCoupler1(*coarseGrid, *fineGrid, fineOrigin + Vector<T,2>(fineExtend[0]-coarseDeltaX,coarseDeltaX), Vector<T,2>{0,fineExtend[1]-2*coarseDeltaX});
-  CoarseCoupler<T,DESCRIPTOR> coarseCoupler2(*coarseGrid, *fineGrid, fineOrigin + Vector<T,2>{coarseDeltaX,fineExtend[1]-coarseDeltaX}, Vector<T,2>{fineExtend[0]-2*coarseDeltaX,0});
-  CoarseCoupler<T,DESCRIPTOR> coarseCoupler3(*coarseGrid, *fineGrid, fineOrigin + coarseDeltaX, Vector<T,2>{fineExtend[0]-2*coarseDeltaX,0});
+  CoarseCoupler<T,DESCRIPTOR> coarseCoupler0(*coarseGrid, *fineGrid, fineOrigin + coarseDeltaX, Vector<T,2> {0,fineExtend[1]-2*coarseDeltaX});
+  CoarseCoupler<T,DESCRIPTOR> coarseCoupler1(*coarseGrid, *fineGrid, fineOrigin + Vector<T,2>(fineExtend[0]-coarseDeltaX,coarseDeltaX), Vector<T,2> {0,fineExtend[1]-2*coarseDeltaX});
+  CoarseCoupler<T,DESCRIPTOR> coarseCoupler2(*coarseGrid, *fineGrid, fineOrigin + Vector<T,2> {coarseDeltaX,fineExtend[1]-coarseDeltaX}, Vector<T,2> {fineExtend[0]-2*coarseDeltaX,0});
+  CoarseCoupler<T,DESCRIPTOR> coarseCoupler3(*coarseGrid, *fineGrid, fineOrigin + coarseDeltaX, Vector<T,2> {fineExtend[0]-2*coarseDeltaX,0});
 
   for (int iT = 0; iT < coarseGrid->getConverter().getLatticeTime(maxPhysT); ++iT) {
     if (converge.hasConverged()) {
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