Interaction folder is finalized with adjustable box and tested for rotating drum

src/Interaction/contactSearch/methods/cellBased/NBS/NBSLevel0Kernels.hpp

@@ -0,0 +1,83 @@
+/*------------------------------- phasicFlow ---------------------------------
+      O        C enter of
+     O O       E ngineering and
+    O   O      M ultiscale modeling of
+   OOOOOOO     F luid flow       
+------------------------------------------------------------------------------
+  Copyright (C): www.cemf.ir
+  email: hamid.r.norouzi AT gmail.com
+------------------------------------------------------------------------------  
+Licence:
+  This file is part of phasicFlow code. It is a free software for simulating 
+  granular and multiphase flows. You can redistribute it and/or modify it under
+  the terms of GNU General Public License v3 or any other later versions. 
+ 
+  phasicFlow is distributed to help others in their research in the field of 
+  granular and multiphase flows, but WITHOUT ANY WARRANTY; without even the
+  implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+
+-----------------------------------------------------------------------------*/
+
+#include "mapperNBS.hpp"
+#include "contactSearchGlobals.hpp"
+
+#include "streams.hpp"
+
+namespace pFlow::NBSLevel0Kernels
+{
+
+using mdrPolicyFindPairs = 
+		Kokkos::MDRangePolicy<
+			Kokkos::IndexType<uint32>,
+			Kokkos::Rank<3>,
+			Kokkos::Schedule<Kokkos::Dynamic>,
+			DefaultExecutionSpace>;
+
+template<typename T>
+INLINE_FUNCTION_HD
+void Swap(T& x, T& y)
+{
+	T tmp = x;
+	x = y;
+	y = tmp;
+}
+
+INLINE_FUNCTION_HD
+bool sphereSphereCheck(const realx3& p1, const realx3 p2, real d1, real d2)
+{
+	return length(p2-p1) < 0.5*(d2+d1);
+}
+
+inline
+uint32 findPairsCount
+(
+    csPairContainerType& pairs,
+    real 	sizeRatio,
+    const deviceViewType1D<realx3>& pointPos,
+    const pFlagTypeDevice& flags,
+    const deviceViewType1D<real>& diameter,
+    mapperNBS::CellIterator cellIter
+)
+{
+
+	auto nCells = cellIter.numCells();
+	
+	mdrPolicyFindPairs
+			mdrPolicy(
+				{0,0,0},
+				{nCells.x(), nCells.y(), nCells.z()} );
+
+	uint32 notInsertedPairs = 0u;
+	
+		
+	Kokkos::parallel_reduce	(
+		"pFlow::NBSLevel0Kernels::findPairsCount",
+		mdrPolicy,
+		LAMBDA_HD(uint32 i, uint32 j, uint32 k, uint32& getFullUpdate){
+			#include "NBSLoop.hpp"
+		}, notInsertedPairs);
+		
+	return notInsertedPairs;
+}
+
+}