diff --git a/MeshLoader.cpp b/MeshLoader.cpp
new file mode 100644
index 0000000000000000000000000000000000000000..7c4d3d2a55912e9613f6758a03b532beca2a2acd
--- /dev/null
+++ b/MeshLoader.cpp
@@ -0,0 +1,272 @@
+#include "MeshLoader.h"
+
+void MeshLoader::add_node(const Node& a)
+{
+	node.push_back(a);
+}
+
+void MeshLoader::add_Finite_Element(const Finite_element& a)
+{
+	FE.push_back(a);
+}
+
+Node UI_to_N(uint16_t id, const MeshLoader& b)
+{
+	Node tmp;
+	for (int i = 0; i < b.node.size(); i++)
+	{
+		if (b.node[i].n_id == id)
+			tmp = b.node[i];
+		break;
+	}
+	return tmp;
+}
+
+uint16_t N_to_UI(const Node& a)
+{
+	return a.n_id;
+}
+
+void MeshLoader::add_BFE(const Boundary_Finite_element& a)
+{
+	BFE.push_back(a);
+}
+
+const vector<Boundary_Finite_element>& MeshLoader::getBoundary_Finite_Element()
+{
+	return BFE;
+}
+
+const vector<Finite_element>& MeshLoader::getFinite_Element()
+{
+	return FE;
+}
+
+const vector<Node>& MeshLoader::get_nodes()
+{
+	return node;
+}
+
+vector< Finite_element> MeshLoader::findFinite_Element(const uint16_t& a, const uint16_t& b, const uint16_t& c)
+{
+	vector<Finite_element> buf;
+	vector<Finite_element>::iterator x = FE.begin();
+	while (x != FE.end())
+	{
+		auto found = std::find_if(x, FE.end(), [a, b, c](const Finite_element& t) {
+			int d = 0;
+			for (int i = 0; i < 4; i++)
+			{
+				if ((t.nodes[i] == a) || (t.nodes[i] == b) || (t.nodes[i] == c))
+					d++;
+			}
+			return d == 3;
+			});
+		if (x != buf.end())
+		{
+			buf.push_back(*x);
+			x++;
+		}
+	}
+	return buf;
+}
+
+vector< Finite_element> MeshLoader::findFinite_Element(const uint16_t& a, const uint16_t& b)
+{
+	vector<Finite_element> buf;
+	vector<Finite_element>::iterator x = FE.begin();
+	while (x != FE.end())
+	{
+		auto found{ std::find_if(x,FE.end(),[a,b](const Finite_element& t) {
+			int d = 0;
+			for (int i = 0; i < 4; i++)
+			{
+				if ((t.nodes[i] == a) || (t.nodes[i] == b))
+					d++;
+			}
+			return d == 2;
+			}) };
+		if (found != FE.end())
+		{
+			buf.push_back(*found);
+			x++;
+		}
+		
+	}
+	return buf;
+}
+
+set<Node> MeshLoader::find_nodes(const uint16_t& gg_id)
+{
+	set<Node> buf;
+	for (int i = 0; i < BFE.size(); i++)
+	{
+		if(BFE[i].g_id==gg_id)
+			for (int j = 0; j < BFE[i].nodes.size(); j++)
+			{
+				buf.insert(UI_to_N(BFE[j].nodes[i],*this));
+			}
+	}
+	return buf;
+}
+
+vector<Finite_element>MeshLoader:: findFinite_Element(const uint16_t& id_materiala)
+{
+	vector<Finite_element> buf;
+	for (int i = 0; i < FE.size(); i++)
+	{
+		if (FE[i].m_id == id_materiala)
+			buf.push_back(FE[i]);
+	}
+	return buf;
+}
+
+vector<Boundary_Finite_element> MeshLoader::findBoundary_Finite_Element(const uint16_t& id_granitsi)
+{
+	vector<Boundary_Finite_element> buf;
+	for (int i = 0; i < BFE.size(); i++)
+	{
+		if (BFE[i].g_id == id_granitsi)
+			buf.push_back(BFE[i]);
+	}
+	return buf;
+}
+
+map<uint16_t, set<uint16_t>> MeshLoader::find_neighbors()
+{
+	map<uint16_t, set<uint16_t>> buf;
+	
+	for (int i = 0; i < FE.size(); i++)
+	{
+		for (int j = 0; j < 4; i++)
+		{
+			for (int k = 0; k < 4; k++)
+			{
+				if (k != j)
+					buf[FE[i].nodes[j]].insert(FE[i].nodes[k]);
+			}
+		    //!!! Короче и быстрее buf[узел i].insert(все соседи i-го узла)
+			/*if (buf.count(FE[i].nodes[j]) == 0)
+			{
+				for (int k = 0; k < 4; k++)
+				{
+					if(j!=k)
+						
+				}
+			}
+			else
+			{
+				for (int k = 0; k < 4; k++)
+				{
+					if(k!=j)
+						buf[FE[i].nodes[j]].insert(FE[i].nodes[k]);
+				}
+			}*/
+		}
+	}
+	return buf;
+}
+
+void MeshLoader::insertt()
+{
+	unordered_set<Edge, EdgeHash> hash;
+	for (int i = 0; i < FE.size(); i++)
+	{
+		for (int j = 0; j < 4; j++)
+		{
+			for (int k = 0; k < 4; k++)
+			{
+				if (j != k)
+				{
+					Edge buf(FE[i].nodes[j], FE[i].nodes[k]);
+					if (hash.find(buf) != hash.end())
+					{
+						Node ins = mid_elem(FE[i].nodes[0], FE[i].nodes[j]);
+						node.push_back(ins);
+						FE[i].nodes.push_back(ins.n_id);
+						uint16_t o = FE[i].nodes[j];
+						uint16_t t = FE[i].nodes[k];
+						buf.nodes[2] = ins.n_id;
+					}
+					//!!! А если ребро захешировано в данный КЭ узел с существующем ID добавлять не надо?
+					//!!! Тип Ребро должен хранить ID ребра в середине, чтобы быстро к нему обратиться.
+				}
+			}
+		}
+	}
+	
+	for (auto& it : BFE)
+	{
+		Edge buff((it).nodes[0],it.nodes[1]);
+		buff = *(hash.find(buff));; //!!! Потеря производительности
+		it.nodes.push_back(buff.nodes[2]);
+	}
+}
+
+Node MeshLoader::mid_elem(uint16_t c, uint16_t d)
+{
+	Node a = UI_to_N(c, *this);
+	Node b = UI_to_N(d, *this);
+	Node buf;
+	buf.x = (a.x + b.x) / 2;
+	buf.y = (a.y + b.y) / 2;
+	buf.z = (a.z + b.z) / 2;
+	buf.gr = true;
+	return buf;
+}
+
+bool srav_node(const Node& a, const Node& b)
+{
+	return (a.n_id==b.n_id);
+}
+
+bool operator ==(const Edge& a, const Edge& b)
+{
+	return(((a.nodes[0] == b.nodes[0]) && (a.nodes[1] == b.nodes[1])||((a.nodes[0] == b.nodes[1]) && (a.nodes[1] == b.nodes[0]))));
+}
+
+/*Edge findEdge(uint16_t id1, uint16_t id2,const unordered_set<Edge, EdgeHash>& sett)
+{
+	Edge buf(id1, id2);
+	
+	//!!! Не понял, а зачем мы тогда unordered_set используем? Чтобы все ребра перебирать?
+	//!!! Потеряны все преимущества контейнера.
+	
+	unordered_set<Edge, EdgeHash>::iterator x = sett.begin();
+		auto found = std::find_if(x, sett.end(), [id1, id2](const Edge& t) {
+			int d = 0;
+			for (int i = 0; i < 3; i++)
+			{
+				if ((t.nodes[i] == id1) || (t.nodes[i] == id2))
+					d++;
+			}
+			return d == 2;
+			});
+	return *found;
+}*/
+	
+
+vector<Boundary_Finite_element> MeshLoader::findBoundary_Finite_Element(uint16_t id1, uint16_t id2)
+{
+	vector<Boundary_Finite_element> buf;
+	vector<Boundary_Finite_element>::iterator it = BFE.begin();
+	while (it != BFE.end())
+	{
+		auto found = std::find_if(it, BFE.end(), [id1, id2](const Boundary_Finite_element& a)
+			{
+				int d = 0;
+				for (int i = 0; i < 4; i++)
+				{
+					if ((a.nodes[i] == id1) || (a.nodes[i] == id2))
+						d++;
+				}
+				return d == 2;
+			});
+		if (it != BFE.end())
+		{
+			buf.push_back(*it);
+			it++;
+		}
+	}
+	return buf;
+}