contact…

contact_detector_shared.hh
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			#ifndef __AKANTU_CONTACT_DETECTOR_SHARED_HH__
			#define __AKANTU_CONTACT_DETECTOR_SHARED_HH__

			#include "aka_common.hh"
			#include "aka_grid_dynamic.hh"

			namespace akantu {

			/// Abstraction over a data structure to search nodes efficiently in a contact detector.
			/// Possible implementations could include an exhaustive search, a spatial grid, an octree, ...
			class NodeSearcher {
			public:
			virtual ~NodeSearcher() = 0;

			/// Count nodes close enough to some position, optionally excluding a specific node.
			virtual UInt countCloseNodes(const Vector<Real> & position, Real maxDistance, UInt excludedNode) = 0;

			/// Find node index closest to the position, optionally excluding a specific node.
			virtual UInt findClosestNode(Vector<Real> & position, UInt excludedNode) = 0;
			};

			class SpatialGridNodeSearcher : public NodeSearcher {
			public:
			explicit SpatialGridNodeSearcher(int spatialDimension);
			~SpatialGridNodeSearcher();

			UInt countCloseNodes(const Vector<akantu::Real> &position, akantu::Real maxDistance, akantu::UInt excludedNode) override;
			UInt findClosestNode(Vector<akantu::Real> &position, akantu::UInt excludedNode) override;

			private:
			SpatialGrid<UInt> grid;
			};

			} // namespace akantu

			#endif // __AKANTU_CONTACT_DETECTOR_SHARED_HH__