diff --git a/App.xaml.cs b/App.xaml.cs
index da89033..eec8ad0 100644
--- a/App.xaml.cs
+++ b/App.xaml.cs
@@ -1,7 +1,9 @@
 using System.Windows;
 using Autofac;
 using StructureHelper.Services;
+using StructureHelper.UnitSystem;
 using StructureHelper.Windows.MainWindow;
+using StructureHelperLogics.Services;
 
 namespace StructureHelper
 {
@@ -18,7 +20,8 @@ namespace StructureHelper
             base.OnStartup(e);
             var builder = new ContainerBuilder();
             builder.RegisterType<PrimitiveRepository>().As<IPrimitiveRepository>().SingleInstance();
-            builder.RegisterType<PrimitiveService>().As<IPrimitiveService>().SingleInstance();
+            builder.RegisterType<UnitSystemService>().AsSelf().SingleInstance();
+            builder.RegisterType<CalculationService>().AsSelf().SingleInstance();
             builder.RegisterType<MainModel>().AsSelf().SingleInstance();
             builder.RegisterType<MainViewModel>().AsSelf().SingleInstance();
 
diff --git a/Infrastructure/UI/DataContexts/Point.cs b/Infrastructure/UI/DataContexts/Point.cs
index d7632f7..ef1b857 100644
--- a/Infrastructure/UI/DataContexts/Point.cs
+++ b/Infrastructure/UI/DataContexts/Point.cs
@@ -1,5 +1,6 @@
 using System;
 using StructureHelper.Infrastructure.Enums;
+using StructureHelper.UnitSystem.Systems;
 using StructureHelper.Windows.MainWindow;
 using StructureHelperCommon.Models.Entities;
 using StructureHelperCommon.Models.Materials;
@@ -9,36 +10,21 @@ namespace StructureHelper.Infrastructure.UI.DataContexts
 {
     public class Point : PrimitiveBase
     {
-        private double square;
-        public double Square
+        public Point(double d, double x, double y, MainViewModel mainViewModel) : base(PrimitiveType.Point, x, y, mainViewModel)
         {
-            get => square;
-            set
-            {
-                square = value;
-                PrimitiveWidth = Math.Round(Math.Sqrt(4 * value / Math.PI), 2);
-                OnPropertyChanged(nameof(PrimitiveWidth));
-                OnPropertyChanged();
-            }
-        }
-
-        public Point(double square, double x, double y, MainViewModel mainViewModel) : base(PrimitiveType.Point, x, y, mainViewModel)
-        {
-            Square = square;
+            PrimitiveWidth = d;
             ShowedX = 0;
             ShowedY = 0;
         }
 
-        public override INdmPrimitive GetNdmPrimitive()
+        public override INdmPrimitive GetNdmPrimitive(IUnitSystem unitSystem)
         {
-            double strength = 0;
-            double centerX = 0;
-            double centerY = 0;
-            double area = 0;
-            string materialName = "s400";
-            ICenter center = new Center { X = centerX, Y = centerY };
+            var width = unitSystem.ConvertLength(PrimitiveWidth);
+            double area = Math.Round(width * width * Math.PI / 4, 2);
+            string materialName = MaterialName;
+            ICenter center = new Center { X = unitSystem.ConvertLength(ShowedX), Y = unitSystem.ConvertLength(ShowedY) };
             IShape shape = new StructureHelperCommon.Models.Shapes.Point { Area = area };
-            IPrimitiveMaterial primitiveMaterial = new PrimitiveMaterial { MaterialType = GetMaterialTypes(), ClassName = materialName, Strength = strength }; ;
+            IPrimitiveMaterial primitiveMaterial = new PrimitiveMaterial { MaterialType = GetMaterialTypes(), ClassName = materialName, Strength = Material.DesingTensileStrength }; ;
             INdmPrimitive ndmPrimitive = new NdmPrimitive { Center = center, Shape = shape, PrimitiveMaterial = primitiveMaterial };
             return ndmPrimitive;
         }
diff --git a/Infrastructure/UI/DataContexts/PrimitiveBase.cs b/Infrastructure/UI/DataContexts/PrimitiveBase.cs
index cce3d18..1b6fad6 100644
--- a/Infrastructure/UI/DataContexts/PrimitiveBase.cs
+++ b/Infrastructure/UI/DataContexts/PrimitiveBase.cs
@@ -4,6 +4,7 @@ using System.Windows.Input;
 using System.Windows.Media;
 using StructureHelper.Infrastructure.Enums;
 using StructureHelper.Models.Materials;
+using StructureHelper.UnitSystem.Systems;
 using StructureHelper.Windows.MainWindow;
 using StructureHelperCommon.Models.Entities;
 using StructureHelperCommon.Models.Materials;
@@ -62,9 +63,12 @@ namespace StructureHelper.Infrastructure.UI.DataContexts
             get => material;
             set
             {
-                MaterialName = material.MaterialClass;
-                OnPropertyChanged(value, ref material);
-                OnPropertyChanged(nameof(MaterialName));
+                if (value != null)
+                {
+                    MaterialName = value.MaterialClass;
+                    OnPropertyChanged(value, ref material);
+                    OnPropertyChanged(nameof(MaterialName));
+                }
             }
         }
         private string materialName = string.Empty;
@@ -276,7 +280,7 @@ namespace StructureHelper.Infrastructure.UI.DataContexts
             if (Type == PrimitiveType.Point) Y = -showedY + Xy1 - PrimitiveWidth / 2;
         }
 
-        public abstract INdmPrimitive GetNdmPrimitive();
+        public abstract INdmPrimitive GetNdmPrimitive(IUnitSystem unitSystem);
         public MaterialTypes GetMaterialTypes()
         {
             MaterialTypes materialTypes;
diff --git a/Infrastructure/UI/DataContexts/Rectangle.cs b/Infrastructure/UI/DataContexts/Rectangle.cs
index fa2727b..7a1dcda 100644
--- a/Infrastructure/UI/DataContexts/Rectangle.cs
+++ b/Infrastructure/UI/DataContexts/Rectangle.cs
@@ -1,4 +1,5 @@
 using StructureHelper.Infrastructure.Enums;
+using StructureHelper.UnitSystem.Systems;
 using StructureHelper.Windows.MainWindow;
 using StructureHelperCommon.Models.Entities;
 using StructureHelperCommon.Models.Materials;
@@ -17,18 +18,17 @@ namespace StructureHelper.Infrastructure.UI.DataContexts
             ShowedY = 0;
         }
 
-        public override INdmPrimitive GetNdmPrimitive()
+        public override INdmPrimitive GetNdmPrimitive(IUnitSystem unitSystem)
         {
-            double strength = 0;
-            double centerX = 0;
-            double centerY = 0;
-            string materialName = "C20";
-            ICenter center = new Center() { X = centerX, Y = centerY };
-            double height = 0;
-            double width = 0;
-            IShape shape = new StructureHelperCommon.Models.Shapes.Rectangle() { Height = height, Width = width, Angle = 0 };
-            IPrimitiveMaterial primitiveMaterial = new PrimitiveMaterial() { MaterialType = GetMaterialTypes(), ClassName = materialName, Strength = strength }; ;
-            INdmPrimitive ndmPrimitive = new NdmPrimitive() { Center = center, Shape = shape, PrimitiveMaterial = primitiveMaterial };
+            var width = unitSystem.ConvertLength(PrimitiveWidth);
+            var height = unitSystem.ConvertLength(PrimitiveHeight);
+            double centerX = unitSystem.ConvertLength(ShowedX) + width / 2;
+            double centerY = unitSystem.ConvertLength(ShowedY) + height / 2;
+            string materialName = MaterialName;
+            ICenter center = new Center { X = centerX, Y = centerY };
+            IShape shape = new StructureHelperCommon.Models.Shapes.Rectangle { Height = height, Width = width, Angle = 0 };
+            IPrimitiveMaterial primitiveMaterial = new PrimitiveMaterial { MaterialType = GetMaterialTypes(), ClassName = materialName, Strength = Material.DesingTensileStrength };
+            INdmPrimitive ndmPrimitive = new NdmPrimitive { Center = center, Shape = shape, PrimitiveMaterial = primitiveMaterial };
             return ndmPrimitive;
         }
     }
diff --git a/Infrastructure/UI/UserControls/PrimitivePopup.xaml b/Infrastructure/UI/UserControls/PrimitivePopup.xaml
index 3d7826f..c320ff4 100644
--- a/Infrastructure/UI/UserControls/PrimitivePopup.xaml
+++ b/Infrastructure/UI/UserControls/PrimitivePopup.xaml
@@ -29,8 +29,6 @@
                     <RowDefinition Height="40"/>
                     <RowDefinition Height="40"/>
                     <RowDefinition Height="40"/>
-                    <RowDefinition Height="40"/>
-                    <RowDefinition Height="*"/>
                 </Grid.RowDefinitions>
                 <Grid.ColumnDefinitions>
                     <ColumnDefinition Width="170"/>
@@ -61,14 +59,12 @@
                     <TextBox VerticalAlignment="Center" HorizontalAlignment="Left" Width="50" Margin="10"
                                          Text="{Binding ShowedZIndex, Mode=TwoWay}"/>
                     <TextBlock VerticalAlignment="Center" Text="Max = "/>
-                    <TextBlock VerticalAlignment="Center" Text="{Binding RelativeSource={RelativeSource FindAncestor, AncestorType={x:Type Window}}, Path=DataContext.PrimitivesCount, Mode=TwoWay}"/>
+                    <TextBlock VerticalAlignment="Center" Text="{Binding RelativeSource={RelativeSource FindAncestor, AncestorType={x:Type Window}}, Path=DataContext.PrimitivesCount}"/>
                 </StackPanel>
                 <Button Grid.Row="9" Grid.Column="0" VerticalAlignment="Center" HorizontalAlignment="Center" Content="Установить впереди всех" Margin="10"
                                     Command="{Binding RelativeSource={RelativeSource FindAncestor, AncestorType={x:Type Window}}, Path=DataContext.SetInFrontOfAll}" CommandParameter="{Binding}"/>
                 <Button Grid.Row="9" Grid.Column="1" VerticalAlignment="Center" HorizontalAlignment="Center" Content="Установить позади всех" Margin="10"
                                     Command="{Binding RelativeSource={RelativeSource FindAncestor, AncestorType={x:Type Window}}, Path=DataContext.SetInBackOfAll}" CommandParameter="{Binding}"/>
-                <Button Grid.Row="10" Grid.Column="0" Grid.ColumnSpan="2" VerticalAlignment="Center" HorizontalAlignment="Right" Margin="10" Content="Установить параметры" 
-                                    Command="{Binding RelativeSource={RelativeSource FindAncestor, AncestorType={x:Type Window}}, Path=DataContext.SetParameters}" CommandParameter="{Binding}"/>
             </Grid>
         </Border>
     </Grid>
diff --git a/Infrastructure/UI/UserControls/PrimitivePopup.xaml.cs b/Infrastructure/UI/UserControls/PrimitivePopup.xaml.cs
index 109396a..dbbf104 100644
--- a/Infrastructure/UI/UserControls/PrimitivePopup.xaml.cs
+++ b/Infrastructure/UI/UserControls/PrimitivePopup.xaml.cs
@@ -1,5 +1,4 @@
 using System.Windows;
-using System.Windows.Controls;
 using System.Windows.Controls.Primitives;
 using StructureHelper.Infrastructure.Enums;
 
diff --git a/MaterialCatalogWindow/MaterialCatalogModel.cs b/MaterialCatalogWindow/MaterialCatalogModel.cs
index 908104e..efa3910 100644
--- a/MaterialCatalogWindow/MaterialCatalogModel.cs
+++ b/MaterialCatalogWindow/MaterialCatalogModel.cs
@@ -27,7 +27,7 @@ namespace StructureHelper.MaterialCatalogWindow
 
         private void InitializeRebarDefinitions()
         {
-            RebarDefinitions = new NamedList<MaterialDefinitionBase>()
+            RebarDefinitions = new NamedList<MaterialDefinitionBase>
             {
                 new RebarDefinition("S240", 2, 240, 240, 1.15, 1.15),
                 new RebarDefinition("S400", 2, 400, 400, 1.15, 1.15),
@@ -38,7 +38,7 @@ namespace StructureHelper.MaterialCatalogWindow
 
         private void InitializeConcreteDefinitions()
         {
-            ConcreteDefinitions = new NamedList<MaterialDefinitionBase>()
+            ConcreteDefinitions = new NamedList<MaterialDefinitionBase>
             {
                 new ConcreteDefinition("C10", 0, 10, 0, 1.3, 1.5),
                 new ConcreteDefinition("C15", 0, 15, 0, 1.3, 1.5),
diff --git a/Services/PrimitiveService.cs b/Services/PrimitiveService.cs
index eae3a35..0d8e183 100644
--- a/Services/PrimitiveService.cs
+++ b/Services/PrimitiveService.cs
@@ -52,24 +52,4 @@ namespace StructureHelper.Services
 
         public IEnumerable<Rectangle> GetRectangles() => rectangles;
     }
-
-    public class PrimitiveService : IPrimitiveService
-    {
-        IPrimitiveRepository primitiveRepository;
-
-        public PrimitiveService(IPrimitiveRepository primitiveRepository)
-        {
-            this.primitiveRepository = primitiveRepository;
-        }
-
-        public PointPrimitive[] GetInnerPoints(RectanglePrimitive rectanglePrimitive)
-        {
-            return new[] { new PointPrimitive(new Center(), new StructureHelperCommon.Models.Shapes.Point()) };
-        }
-    }
-
-    public interface IPrimitiveService
-    {
-        PointPrimitive[] GetInnerPoints(RectanglePrimitive rectanglePrimitive);
-    }
 }
diff --git a/StructureHelper.csproj b/StructureHelper.csproj
index e29a909..8d1771d 100644
--- a/StructureHelper.csproj
+++ b/StructureHelper.csproj
@@ -100,6 +100,10 @@
       <DependentUpon>PrimitivePopup.xaml</DependentUpon>
     </Compile>
     <Compile Include="Services\PrimitiveService.cs" />
+    <Compile Include="UnitSystem\UnitSystemService.cs" />
+    <Compile Include="UnitSystem\Enums\SystemTypes.cs" />
+    <Compile Include="UnitSystem\Systems\SystemSi.cs" />
+    <Compile Include="UnitSystem\Systems\IUnitSystem.cs" />
     <Compile Include="Windows\AddMaterialWindow\AddMaterialView.xaml.cs">
       <DependentUpon>AddMaterialView.xaml</DependentUpon>
     </Compile>
@@ -193,6 +197,10 @@
       <Project>{5dfec3fd-9677-47bb-9e88-eb71828b5913}</Project>
       <Name>StructureHelperCommon</Name>
     </ProjectReference>
+    <ProjectReference Include="StructureHelperLogics\StructureHelperLogics.csproj">
+      <Project>{330bef5b-15be-4d2c-a750-b1ae50fb2be3}</Project>
+      <Name>StructureHelperLogics</Name>
+    </ProjectReference>
   </ItemGroup>
   <Import Project="$(MSBuildToolsPath)\Microsoft.CSharp.targets" />
 </Project>
\ No newline at end of file
diff --git a/StructureHelperCommon/Models/NdmPrimitives/PointPrimitive.cs b/StructureHelperCommon/Models/NdmPrimitives/PointPrimitive.cs
index 7bdaf6f..1b7f8ac 100644
--- a/StructureHelperCommon/Models/NdmPrimitives/PointPrimitive.cs
+++ b/StructureHelperCommon/Models/NdmPrimitives/PointPrimitive.cs
@@ -17,8 +17,8 @@ namespace StructureHelperCommon.Models.NdmPrimitives
         {
             double strength = 400e6d;
             string materialName = "s400";
-            IPrimitiveMaterial primitiveMaterial = new PrimitiveMaterial() { MaterialType = GetMaterialTypes(), ClassName = materialName, Strength = strength }; ;
-            INdmPrimitive ndmPrimitive = new NdmPrimitive() { Center = _center, Shape = _shape, PrimitiveMaterial = primitiveMaterial };
+            IPrimitiveMaterial primitiveMaterial = new PrimitiveMaterial { MaterialType = GetMaterialTypes(), ClassName = materialName, Strength = strength }; ;
+            INdmPrimitive ndmPrimitive = new NdmPrimitive { Center = _center, Shape = _shape, PrimitiveMaterial = primitiveMaterial };
             return ndmPrimitive;
         }
 
diff --git a/StructureHelperCommon/Models/NdmPrimitives/RectanglePrimitive.cs b/StructureHelperCommon/Models/NdmPrimitives/RectanglePrimitive.cs
index 8b94342..01f72ca 100644
--- a/StructureHelperCommon/Models/NdmPrimitives/RectanglePrimitive.cs
+++ b/StructureHelperCommon/Models/NdmPrimitives/RectanglePrimitive.cs
@@ -18,8 +18,8 @@ namespace StructureHelperCommon.Models.NdmPrimitives
         {
             double strength = 40e6d;
             string materialName = "C40/45";
-            IPrimitiveMaterial primitiveMaterial = new PrimitiveMaterial() { MaterialType = GetMaterialTypes(), ClassName = materialName, Strength = strength }; ;
-            INdmPrimitive ndmPrimitive = new NdmPrimitive() { Center = _center, Shape = _shape, PrimitiveMaterial = primitiveMaterial, NdmMaxSize = 1, NdmMinDivision = 20 };
+            IPrimitiveMaterial primitiveMaterial = new PrimitiveMaterial { MaterialType = GetMaterialTypes(), ClassName = materialName, Strength = strength }; ;
+            INdmPrimitive ndmPrimitive = new NdmPrimitive { Center = _center, Shape = _shape, PrimitiveMaterial = primitiveMaterial, NdmMaxSize = 1, NdmMinDivision = 20 };
             return ndmPrimitive;
         }
 
diff --git a/StructureHelperLogics/NdmCalculations/Triangulations/PointTriangulationLogic.cs b/StructureHelperLogics/NdmCalculations/Triangulations/PointTriangulationLogic.cs
index 8500845..a324533 100644
--- a/StructureHelperLogics/NdmCalculations/Triangulations/PointTriangulationLogic.cs
+++ b/StructureHelperLogics/NdmCalculations/Triangulations/PointTriangulationLogic.cs
@@ -21,7 +21,7 @@ namespace StructureHelperLogics.NdmCalculations.Triangulations
             ICenter center = options.Center;
             double area = options.Area;
             List<INdm> ndmCollection = new List<INdm>();
-            INdm ndm = new Ndm() { CenterX = center.X, CenterY = center.Y, Area = area, Material = material };
+            INdm ndm = new Ndm { CenterX = center.X, CenterY = center.Y, Area = area, Material = material };
             ndmCollection.Add(ndm);
             return ndmCollection;
         }
diff --git a/StructureHelperLogics/Services/CalculationService.cs b/StructureHelperLogics/Services/CalculationService.cs
index 259b2b6..af62cc0 100644
--- a/StructureHelperLogics/Services/CalculationService.cs
+++ b/StructureHelperLogics/Services/CalculationService.cs
@@ -1,15 +1,10 @@
-using Autofac;
-using System.Collections.Generic;
-using System.Linq;
+using System.Collections.Generic;
 using System.Threading;
 using LoaderCalculator;
 using LoaderCalculator.Data.Matrix;
 using LoaderCalculator.Data.Ndms;
 using LoaderCalculator.Data.SourceData;
-using StructureHelper;
-using StructureHelper.Services;
 using StructureHelperCommon.Models.Entities;
-using StructureHelperCommon.Models.NdmPrimitives;
 using StructureHelperLogics.NdmCalculations.Triangulations;
 using StructureHelperLogics.Infrastructures.CommonEnums;
 
@@ -17,51 +12,29 @@ namespace StructureHelperLogics.Services
 {
     public class CalculationService
     {
-        public IStrainMatrix GetPrimitiveStrainMatrix(double topArea, double bottomArea, RectanglePrimitive concreteRectangle, double mx, double my, double nz)
+        public IStrainMatrix GetPrimitiveStrainMatrix(INdmPrimitive[] ndmPrimitives, double mx, double my, double nz)
         {
-            var ndmPrimitives = new List<INdmPrimitive>();
-            //Добавляем прямоугольник бетонного сечения
-
-            ndmPrimitives.Add(concreteRectangle.GetNdmPrimitive());
-            
-            using (var scope = App.Container.BeginLifetimeScope())
-            {
-                var primitiveService = scope.Resolve<PrimitiveService>();
-                //Добавляем точки внутри прямоугольника
-                ndmPrimitives.AddRange(primitiveService.GetInnerPoints(concreteRectangle).Select(x=>x.GetNdmPrimitive()));
-            }
-
             //Коллекция для хранения элементарных участков
             var ndmCollection = new List<INdm>();
             //Настройки триангуляции, пока опции могут быть только такие
-            ITriangulationOptions options = new TriangulationOptions
-            {
-                LimiteState = LimitStates.Collapse,
-                CalcTerm = CalcTerms.ShortTerm
-            };
-
+            ITriangulationOptions options = new TriangulationOptions { LimiteState = LimitStates.Collapse, CalcTerm = CalcTerms.ShortTerm };
+           
             //Формируем коллекцию элементарных участков для расчета в библитеке (т.е. выполняем триангуляцию)
             ndmCollection.AddRange(Triangulation.GetNdms(ndmPrimitives, options));
-
-            var calculator = new Calculator();
-            var calculationData = new LoaderOptions
+            var loaderData = new LoaderOptions
             {
                 Preconditions = new Preconditions
                 {
                     ConditionRate = 0.01,
                     MaxIterationCount = 100,
-                    StartForceMatrix = new ForceMatrix
-                    {
-                        Mx = mx,
-                        My = my,
-                        Nz = nz
-                    }
+                    StartForceMatrix = new ForceMatrix { Mx = mx, My = my, Nz = nz }
                 },
                 NdmCollection = ndmCollection
             };
-            calculator.Run(calculationData, new CancellationToken());
-            var results = calculator.Result;
-            return results.StrainMatrix;
+            var calculator = new Calculator();
+            //Act
+            calculator.Run(loaderData, new CancellationToken());
+            return calculator.Result.StrainMatrix;
         }
     }
 }
diff --git a/StructureHelperLogics/StructureHelperLogics.csproj b/StructureHelperLogics/StructureHelperLogics.csproj
index 30b7446..8fc4ebc 100644
--- a/StructureHelperLogics/StructureHelperLogics.csproj
+++ b/StructureHelperLogics/StructureHelperLogics.csproj
@@ -9,7 +9,6 @@
   </ItemGroup>
 
   <ItemGroup>
-    <ProjectReference Include="..\StructureHelper.csproj" />
     <ProjectReference Include="..\StructureHelperCommon\StructureHelperCommon.csproj" />
   </ItemGroup>
 
diff --git a/StructureHelperTests/FunctionalTests/Ndms/RCSections/RCSectionFromNdmPrimitiveTest.cs b/StructureHelperTests/FunctionalTests/Ndms/RCSections/RCSectionFromNdmPrimitiveTest.cs
index 307e58e..e3736b6 100644
--- a/StructureHelperTests/FunctionalTests/Ndms/RCSections/RCSectionFromNdmPrimitiveTest.cs
+++ b/StructureHelperTests/FunctionalTests/Ndms/RCSections/RCSectionFromNdmPrimitiveTest.cs
@@ -37,22 +37,22 @@ namespace StructureHelperTests.FunctionalTests.Ndms.RCSections
             //Коллекция для хранения элементарных участков
             var ndmCollection = new List<INdm>();
             //Настройки триангуляции, пока опции могут быть только такие
-            ITriangulationOptions options = new TriangulationOptions() { LimiteState = StructureHelperLogics.Infrastructures.CommonEnums.LimitStates.Collapse, CalcTerm = StructureHelperLogics.Infrastructures.CommonEnums.CalcTerms.ShortTerm };
+            ITriangulationOptions options = new TriangulationOptions { LimiteState = StructureHelperLogics.Infrastructures.CommonEnums.LimitStates.Collapse, CalcTerm = StructureHelperLogics.Infrastructures.CommonEnums.CalcTerms.ShortTerm };
             var ndmPrimitives = new List<INdmPrimitive>();
             //Добавляем прямоугольник бетонного сечения
-            var concreteRectangle = new RectanglePrimitive(new Center() { X = 0, Y = 0 }, new Rectangle() { Width = width, Height = height, Angle = 0 });
+            var concreteRectangle = new RectanglePrimitive(new Center { X = 0, Y = 0 }, new Rectangle { Width = width, Height = height, Angle = 0 });
             ndmPrimitives.Add(concreteRectangle.GetNdmPrimitive());
             //Добавляем 4 точки для арматуры
             // 0.05 - величина защитного слоя (расстояние от грани прямоугольника до центра арматуры
             //С площадью нижней арматуры
-            var leftBottomReinforcementPoint = new PointPrimitive(new Center() { X = -width / 2 + 0.05d, Y = -height / 2 + 0.05 }, new Point() { Area = bottomArea });
+            var leftBottomReinforcementPoint = new PointPrimitive(new Center { X = -width / 2 + 0.05d, Y = -height / 2 + 0.05 }, new Point { Area = bottomArea });
             ndmPrimitives.Add(leftBottomReinforcementPoint.GetNdmPrimitive());
-            var rightBottomReinforcementPoint = new PointPrimitive(new Center() { X = width / 2 - 0.05d, Y = -height / 2 + 0.05 }, new Point() { Area = bottomArea });
+            var rightBottomReinforcementPoint = new PointPrimitive(new Center { X = width / 2 - 0.05d, Y = -height / 2 + 0.05 }, new Point { Area = bottomArea });
             ndmPrimitives.Add(rightBottomReinforcementPoint.GetNdmPrimitive());
             //С площадью верхней арматуры
-            var leftTopReinforcementPoint = new PointPrimitive(new Center() { X = -width / 2 + 0.05d, Y = height / 2 - 0.05 }, new Point() { Area = topArea });
+            var leftTopReinforcementPoint = new PointPrimitive(new Center { X = -width / 2 + 0.05d, Y = height / 2 - 0.05 }, new Point { Area = topArea });
             ndmPrimitives.Add(leftTopReinforcementPoint.GetNdmPrimitive());
-            var rightTopReinforcementPoint = new PointPrimitive(new Center() { X = width / 2 - 0.05d, Y = height / 2 - 0.05 }, new Point() { Area = topArea });
+            var rightTopReinforcementPoint = new PointPrimitive(new Center { X = width / 2 - 0.05d, Y = height / 2 - 0.05 }, new Point { Area = topArea });
             ndmPrimitives.Add(rightTopReinforcementPoint.GetNdmPrimitive());
             //Формируем коллекцию элементарных участков для расчета в библитеке (т.е. выполняем триангуляцию)
             ndmCollection.AddRange(Triangulation.GetNdms(ndmPrimitives, options));
diff --git a/StructureHelperTests/FunctionalTests/Ndms/RCSections/RCSectionTest.cs b/StructureHelperTests/FunctionalTests/Ndms/RCSections/RCSectionTest.cs
index 9574179..8daf761 100644
--- a/StructureHelperTests/FunctionalTests/Ndms/RCSections/RCSectionTest.cs
+++ b/StructureHelperTests/FunctionalTests/Ndms/RCSections/RCSectionTest.cs
@@ -29,7 +29,7 @@ namespace StructureHelperTests.FunctionalTests.Ndms.RCSections
             double width = 0.4;
             double height = 0.6;
             var ndmCollection = new List<INdm>();
-            ITriangulationOptions options = new TriangulationOptions() { LimiteState = StructureHelperLogics.Infrastructures.CommonEnums.LimitStates.Collapse, CalcTerm = StructureHelperLogics.Infrastructures.CommonEnums.CalcTerms.ShortTerm };
+            ITriangulationOptions options = new TriangulationOptions { LimiteState = StructureHelperLogics.Infrastructures.CommonEnums.LimitStates.Collapse, CalcTerm = StructureHelperLogics.Infrastructures.CommonEnums.CalcTerms.ShortTerm };
             var primitives = new List<INdmPrimitive>();
             primitives.AddRange(GetConcreteNdms(width, height));
             primitives.AddRange(GetReinforcementNdms(width, height, topArea, bottomArea));
@@ -60,11 +60,11 @@ namespace StructureHelperTests.FunctionalTests.Ndms.RCSections
         private IEnumerable<INdmPrimitive> GetConcreteNdms(double width, double height)
         {
             double strength = 40e6;
-            ICenter center = new Center() { X = 0, Y = 0 };
-            IRectangle rectangle = new Rectangle() { Width = width, Height = height, Angle = 0 };
-            IPrimitiveMaterial material = new PrimitiveMaterial() { MaterialType = MaterialTypes.Concrete, ClassName = "С40", Strength = strength };
+            ICenter center = new Center { X = 0, Y = 0 };
+            IRectangle rectangle = new Rectangle { Width = width, Height = height, Angle = 0 };
+            IPrimitiveMaterial material = new PrimitiveMaterial { MaterialType = MaterialTypes.Concrete, ClassName = "С40", Strength = strength };
             //ITriangulationOptions options = new TriangulationOptions() { LimiteState = StructureHelperLogics.Infrastructures.CommonEnums.LimitStates.Collapse, CalcTerm = StructureHelperLogics.Infrastructures.CommonEnums.CalcTerms.ShortTerm };
-            INdmPrimitive primitive = new NdmPrimitive() { Center = center, Shape = rectangle, PrimitiveMaterial = material, NdmMaxSize = 1, NdmMinDivision = 20 };
+            INdmPrimitive primitive = new NdmPrimitive { Center = center, Shape = rectangle, PrimitiveMaterial = material, NdmMaxSize = 1, NdmMinDivision = 20 };
             List<INdmPrimitive> primitives = new List<INdmPrimitive> {primitive};
             return primitives;
         }
@@ -73,27 +73,27 @@ namespace StructureHelperTests.FunctionalTests.Ndms.RCSections
         {
             double gap = 0.05d;
             double strength = 4e8;
-            IShape topReinforcement = new Point() { Area = topArea };
-            IShape bottomReinforcement = new Point() { Area = bottomArea };
-            IPrimitiveMaterial primitiveMaterial = new PrimitiveMaterial() { MaterialType = MaterialTypes.Reinforcement, ClassName = "S400", Strength = strength };
+            IShape topReinforcement = new Point { Area = topArea };
+            IShape bottomReinforcement = new Point { Area = bottomArea };
+            IPrimitiveMaterial primitiveMaterial = new PrimitiveMaterial { MaterialType = MaterialTypes.Reinforcement, ClassName = "S400", Strength = strength };
             //ITriangulationOptions options = new TriangulationOptions() { LimiteState = StructureHelperLogics.Infrastructures.CommonEnums.LimitStates.Collapse, CalcTerm = StructureHelperLogics.Infrastructures.CommonEnums.CalcTerms.ShortTerm };
-            ICenter centerRT = new Center() { X = width / 2 - gap, Y = height / 2 - gap };
-            ICenter centerLT = new Center() { X = - (width / 2 - gap), Y = height / 2 - gap };
-            ICenter centerRB = new Center() { X = width / 2 - gap, Y = - (height / 2 - gap) };
-            ICenter centerLB = new Center() { X = -(width / 2 - gap), Y = - (height / 2 - gap) };
+            ICenter centerRT = new Center { X = width / 2 - gap, Y = height / 2 - gap };
+            ICenter centerLT = new Center { X = - (width / 2 - gap), Y = height / 2 - gap };
+            ICenter centerRB = new Center { X = width / 2 - gap, Y = - (height / 2 - gap) };
+            ICenter centerLB = new Center { X = -(width / 2 - gap), Y = - (height / 2 - gap) };
             List<INdmPrimitive> primitives = new List<INdmPrimitive>();
             INdmPrimitive primitive;
             //Right top bar
-            primitive = new NdmPrimitive() { Center = centerRT, Shape = topReinforcement, PrimitiveMaterial = primitiveMaterial};
+            primitive = new NdmPrimitive { Center = centerRT, Shape = topReinforcement, PrimitiveMaterial = primitiveMaterial};
             primitives.Add(primitive);
             //Left top bar
-            primitive = new NdmPrimitive() { Center = centerLT, Shape = topReinforcement, PrimitiveMaterial = primitiveMaterial };
+            primitive = new NdmPrimitive { Center = centerLT, Shape = topReinforcement, PrimitiveMaterial = primitiveMaterial };
             primitives.Add(primitive);
             //Right bottom bar
-            primitive = new NdmPrimitive() { Center = centerRB, Shape = bottomReinforcement, PrimitiveMaterial = primitiveMaterial };
+            primitive = new NdmPrimitive { Center = centerRB, Shape = bottomReinforcement, PrimitiveMaterial = primitiveMaterial };
             primitives.Add(primitive);
             //Left bottom bar
-            primitive = new NdmPrimitive() { Center = centerLB, Shape = bottomReinforcement, PrimitiveMaterial = primitiveMaterial };
+            primitive = new NdmPrimitive { Center = centerLB, Shape = bottomReinforcement, PrimitiveMaterial = primitiveMaterial };
             primitives.Add(primitive);
             return primitives;
         }
diff --git a/StructureHelperTests/FunctionalTests/Ndms/SteelSections/ReinforcementTest.cs b/StructureHelperTests/FunctionalTests/Ndms/SteelSections/ReinforcementTest.cs
index bd95006..ac40fa8 100644
--- a/StructureHelperTests/FunctionalTests/Ndms/SteelSections/ReinforcementTest.cs
+++ b/StructureHelperTests/FunctionalTests/Ndms/SteelSections/ReinforcementTest.cs
@@ -21,11 +21,11 @@ namespace StructureHelperTests.FunctionalTests.Ndms.SteelSections
         public void Run_ShouldPass(double width, double height, double strength, double mx, double my, double nz, double expectedKx, double expectedKy, double expectedEpsilonZ)
         {
             //Arrange
-            ICenter center = new Center() { X = 0, Y = 0 };
-            IRectangle rectangle = new Rectangle() { Width = width, Height = height, Angle = 0 };
-            IPrimitiveMaterial material = new PrimitiveMaterial() { MaterialType = MaterialTypes.Reinforcement, ClassName = "S400", Strength = strength };
-            ITriangulationOptions options = new TriangulationOptions() { LimiteState = StructureHelperLogics.Infrastructures.CommonEnums.LimitStates.Collapse, CalcTerm = StructureHelperLogics.Infrastructures.CommonEnums.CalcTerms.ShortTerm };
-            INdmPrimitive primitive = new NdmPrimitive() { Center = center, Shape = rectangle, PrimitiveMaterial = material, NdmMaxSize = 1, NdmMinDivision = 100 };
+            ICenter center = new Center { X = 0, Y = 0 };
+            IRectangle rectangle = new Rectangle { Width = width, Height = height, Angle = 0 };
+            IPrimitiveMaterial material = new PrimitiveMaterial { MaterialType = MaterialTypes.Reinforcement, ClassName = "S400", Strength = strength };
+            ITriangulationOptions options = new TriangulationOptions { LimiteState = StructureHelperLogics.Infrastructures.CommonEnums.LimitStates.Collapse, CalcTerm = StructureHelperLogics.Infrastructures.CommonEnums.CalcTerms.ShortTerm };
+            INdmPrimitive primitive = new NdmPrimitive { Center = center, Shape = rectangle, PrimitiveMaterial = material, NdmMaxSize = 1, NdmMinDivision = 100 };
             List<INdmPrimitive> primitives = new List<INdmPrimitive>();
             primitives.Add(primitive);
             var ndmCollection = Triangulation.GetNdms(primitives, options);
diff --git a/StructureHelperTests/LibrariesTests/Ndms/RCSections/RCSectionTest.cs b/StructureHelperTests/LibrariesTests/Ndms/RCSections/RCSectionTest.cs
index dc128e8..bf235cc 100644
--- a/StructureHelperTests/LibrariesTests/Ndms/RCSections/RCSectionTest.cs
+++ b/StructureHelperTests/LibrariesTests/Ndms/RCSections/RCSectionTest.cs
@@ -90,7 +90,7 @@ namespace LoaderCalculator.Tests.FunctionalTests.SectionTests
             double height = 0.6;
             ArrangeMaterial(LimitStates.Collapse, true);
             List<INdm> ndmList = new List<INdm>();
-            IStrainMatrix prestrainMatrix = new StrainMatrix() { Kx = prestrainKx, Ky = prestrainKy, EpsZ = prestrainEpsZ };
+            IStrainMatrix prestrainMatrix = new StrainMatrix { Kx = prestrainKx, Ky = prestrainKy, EpsZ = prestrainEpsZ };
             ndmList.AddRange(GetConcreteNdms(width, height));
             var reinforcement = GetReinforcementNdms(width, height, topArea, bottomArea);
             NdmTransform.SetPrestrain(reinforcement, prestrainMatrix);
diff --git a/StructureHelperTests/UnitTests/Ndms/Triangulations/RectangleTriangulationTest.cs b/StructureHelperTests/UnitTests/Ndms/Triangulations/RectangleTriangulationTest.cs
index 46c04c7..079f4e0 100644
--- a/StructureHelperTests/UnitTests/Ndms/Triangulations/RectangleTriangulationTest.cs
+++ b/StructureHelperTests/UnitTests/Ndms/Triangulations/RectangleTriangulationTest.cs
@@ -21,8 +21,8 @@ namespace StructureHelperTests.UnitTests.Ndms.Triangulations
         {
             //Arrange
             IMaterial material = new Material();
-            ICenter center = new Center() { X = centerX, Y = centerY };
-            IRectangle rectangle = new Rectangle() { Width = width, Height = height, Angle = angle };
+            ICenter center = new Center { X = centerX, Y = centerY };
+            IRectangle rectangle = new Rectangle { Width = width, Height = height, Angle = angle };
             IRectangleTriangulationLogicOptions options = new StructureHelperLogics.NdmCalculations.Triangulations.RectangleTriangulationLogicOptions(center, rectangle, ndmMaxSize, ndmMinDivision);
             IRectangleTriangulationLogic logic = new StructureHelperLogics.NdmCalculations.Triangulations.RectangleTriangulationLogic(options);
             //Act
diff --git a/UnitSystem/Enums/SystemTypes.cs b/UnitSystem/Enums/SystemTypes.cs
new file mode 100644
index 0000000..0aaacfc
--- /dev/null
+++ b/UnitSystem/Enums/SystemTypes.cs
@@ -0,0 +1,23 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace StructureHelper.UnitSystem.Enums
+{
+    public enum Force
+    {
+    }
+    public enum Pressure
+    {
+    }
+    public enum Length
+    {
+        M
+    }
+    public enum MultiplyPrefix
+    {
+        m
+    }
+}
diff --git a/UnitSystem/Systems/IUnitSystem.cs b/UnitSystem/Systems/IUnitSystem.cs
new file mode 100644
index 0000000..c116f7e
--- /dev/null
+++ b/UnitSystem/Systems/IUnitSystem.cs
@@ -0,0 +1,14 @@
+using System;
+using StructureHelper.UnitSystem.Enums;
+
+namespace StructureHelper.UnitSystem.Systems
+{
+    public interface IUnitSystem
+    {
+        string Name { get; }
+        Tuple<Force, MultiplyPrefix> ForceUnits { get; }
+        Tuple<Pressure, MultiplyPrefix> PressureUnits { get; }
+        Tuple<Length, MultiplyPrefix> LengthUnits { get; }
+        double ConvertLength(double length);
+    }
+}
\ No newline at end of file
diff --git a/UnitSystem/Systems/SystemSi.cs b/UnitSystem/Systems/SystemSi.cs
new file mode 100644
index 0000000..95167ae
--- /dev/null
+++ b/UnitSystem/Systems/SystemSi.cs
@@ -0,0 +1,29 @@
+using System;
+using StructureHelper.UnitSystem.Enums;
+using StructureHelper.UnitSystem.Systems;
+
+namespace StructureHelper.UnitSystem
+{
+    internal class SystemSi : IUnitSystem
+    {
+        public SystemSi()
+        {
+            LengthUnits = new Tuple<Length, MultiplyPrefix>(Length.M, MultiplyPrefix.m);
+        }
+
+        public string Name => "СИ";
+        public Tuple<Force, MultiplyPrefix> ForceUnits { get; }
+        public Tuple<Pressure, MultiplyPrefix> PressureUnits { get; }
+        public Tuple<Length, MultiplyPrefix> LengthUnits { get; }
+        public double ConvertLength(double length)
+        {
+            switch (LengthUnits.Item2)
+            {
+                case MultiplyPrefix.m:
+                    return length / 1000;
+                default:
+                    throw new ArgumentOutOfRangeException();
+            }
+        }
+    }
+}
diff --git a/UnitSystem/UnitSystemService.cs b/UnitSystem/UnitSystemService.cs
new file mode 100644
index 0000000..acf96a8
--- /dev/null
+++ b/UnitSystem/UnitSystemService.cs
@@ -0,0 +1,19 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using StructureHelper.UnitSystem.Systems;
+
+namespace StructureHelper.UnitSystem
+{
+    public class UnitSystemService
+    {
+        private IUnitSystem currentSystem;
+        public IUnitSystem GetCurrentSystem() => currentSystem;
+        public UnitSystemService()
+        {
+            currentSystem = new SystemSi();
+        }
+    }
+}
diff --git a/Windows/ColorPickerWindow/ColorPickerView.xaml b/Windows/ColorPickerWindow/ColorPickerView.xaml
index ae0afa2..30c684d 100644
--- a/Windows/ColorPickerWindow/ColorPickerView.xaml
+++ b/Windows/ColorPickerWindow/ColorPickerView.xaml
@@ -4,8 +4,9 @@
         xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
         xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
         xmlns:local="clr-namespace:StructureHelper"
+        xmlns:colorPickerWindow="clr-namespace:StructureHelper.Windows.ColorPickerWindow"
         mc:Ignorable="d"
-        d:DataContext="{d:DesignInstance local:ColorPickerViewModel}"
+        d:DataContext="{d:DesignInstance colorPickerWindow:ColorPickerViewModel}"
         Title="Выбрать цвет" Height="200" Width="500" Topmost="True" ResizeMode="NoResize">
     <Grid>
         <Grid.RowDefinitions>
@@ -28,6 +29,7 @@
             <Rectangle Fill="{Binding SelectedColor}"/>
         </Border>
 
+
         <TextBlock Grid.Row="1" VerticalAlignment="Center" HorizontalAlignment="Left" Margin="10" Text="Зеленый"/>
         <Slider Grid.Row="1" Grid.Column="1" VerticalAlignment="Center" HorizontalAlignment="Stretch" Margin="10" Value="{Binding Green}" Minimum="0" Maximum="255"/>
         <TextBox Grid.Row="1" Grid.Column="2" VerticalAlignment="Center" HorizontalAlignment="Stretch" Margin="10" Text="{Binding Green}"/>
diff --git a/Windows/ColorPickerWindow/ColorPickerViewModel.cs b/Windows/ColorPickerWindow/ColorPickerViewModel.cs
index 5287416..0d83a63 100644
--- a/Windows/ColorPickerWindow/ColorPickerViewModel.cs
+++ b/Windows/ColorPickerWindow/ColorPickerViewModel.cs
@@ -31,7 +31,7 @@ namespace StructureHelper.Windows.ColorPickerWindow
         public Brush SelectedColor
         {
             get => selectedColor;
-            set => OnPropertyChanged(value, selectedColor);
+            set => OnPropertyChanged(value, ref selectedColor);
         }
         public ICommand SetColor { get; }
         public ColorPickerViewModel(PrimitiveBase primitive)
diff --git a/Windows/MainWindow/MainModel.cs b/Windows/MainWindow/MainModel.cs
index 46e94fe..b886b6e 100644
--- a/Windows/MainWindow/MainModel.cs
+++ b/Windows/MainWindow/MainModel.cs
@@ -1,7 +1,30 @@
-namespace StructureHelper.Windows.MainWindow
+using LoaderCalculator.Data.Matrix;
+using StructureHelper.Services;
+using StructureHelper.UnitSystem;
+using StructureHelperLogics.Services;
+using System.Linq;
+
+namespace StructureHelper.Windows.MainWindow
 {
     public class MainModel
     {
-
+        private IPrimitiveRepository primitiveRepository;
+        private CalculationService calculationService;
+        private UnitSystemService unitSystemService;
+        
+        public MainModel(IPrimitiveRepository primitiveRepository, CalculationService calculationService, UnitSystemService unitSystemService)
+        {
+            this.primitiveRepository = primitiveRepository;
+            this.calculationService = calculationService;
+            this.unitSystemService = unitSystemService;
+        }
+        
+        public IStrainMatrix Calculate(double mx, double my, double nz)
+        {
+            var unitSystem = unitSystemService.GetCurrentSystem();
+            return calculationService.GetPrimitiveStrainMatrix(primitiveRepository.GetPoints()
+                .Select(x => x.GetNdmPrimitive(unitSystem))
+                .Concat(primitiveRepository.GetRectangles().Select(x => x.GetNdmPrimitive(unitSystem))).ToArray(), mx, my, nz);
+        }
     }
 }
diff --git a/Windows/MainWindow/MainView.xaml b/Windows/MainWindow/MainView.xaml
index d74f54f..8f45269 100644
--- a/Windows/MainWindow/MainView.xaml
+++ b/Windows/MainWindow/MainView.xaml
@@ -9,12 +9,10 @@
         xmlns:dataContexts="clr-namespace:StructureHelper.Infrastructure.UI.DataContexts"
         xmlns:mouseEventTriggers="clr-namespace:StructureHelper.Infrastructure.UI.Triggers.MouseEventTriggers"
         xmlns:local="clr-namespace:StructureHelper.Windows.MainWindow"
+        xmlns:enums="clr-namespace:StructureHelper.Infrastructure.Enums"
         mc:Ignorable="d"
         d:DataContext="{d:DesignInstance local:MainViewModel}"
         Title="StructureHelper" Height="700" Width="1000">
-    <Window.InputBindings>
-        <KeyBinding Command="{Binding SetParameters}" Key="Enter"/>
-    </Window.InputBindings>
     <Window.Resources>
         <DataTemplate DataType="{x:Type dataContexts:Rectangle}">
             <dataTemplates:RectangleTemplate/>
@@ -29,7 +27,10 @@
             <RowDefinition Height="40"/>
             <RowDefinition Height="40"/>
         </Grid.RowDefinitions>
-        <Border BorderBrush="Black" Background="White" BorderThickness="1" Margin="5">
+        <Grid.ColumnDefinitions>
+            <ColumnDefinition Width="*"/>
+        </Grid.ColumnDefinitions>
+        <Border BorderBrush="Black" Background="White" BorderThickness="1" Margin="5" Grid.ColumnSpan="5">
             <i:Interaction.Triggers>
                 <i:EventTrigger EventName="PreviewMouseDown">
                     <i:InvokeCommandAction Command="{Binding ClearSelection}" CommandParameter="{Binding}"/>
@@ -87,8 +88,15 @@
                 </Canvas>
             </ScrollViewer>
         </Border>
-        <Button Grid.Row="1" VerticalAlignment="Center" HorizontalAlignment="Left" Margin="10" Content="Справочник" Command="{Binding OpenMaterialCatalog}"/>
-        <Button Grid.Row="1" VerticalAlignment="Center" HorizontalAlignment="Right" Margin="10" Content="Добавить прямоугольник" Command="{Binding AddRectangle}"/>
-        <Button Grid.Row="2" VerticalAlignment="Center" HorizontalAlignment="Right" Margin="10" Content="Добавить точку" Command="{Binding AddEllipse}"/>
+        <StackPanel Grid.Row="1" Orientation="Horizontal">
+            <Button VerticalAlignment="Center" HorizontalAlignment="Left" Margin="5" Content="Справочник" Command="{Binding OpenMaterialCatalog}"/>
+            <Button VerticalAlignment="Center" HorizontalAlignment="Left" Margin="5" Content="Система едениц" Command="{Binding OpenUnitsSystemSettings}"/>
+            <Label VerticalAlignment="Center" HorizontalAlignment="Left" Margin="5" Content="{Binding UnitsSystemName}"/>
+        </StackPanel>
+        <StackPanel Grid.Row="1" Orientation="Horizontal" HorizontalAlignment="Right">
+            <Button VerticalAlignment="Center" Margin="5" Content="Добавить прямоугольник" Command="{Binding AddPrimitive}" CommandParameter="{x:Static enums:PrimitiveType.Rectangle}"/>
+            <Button VerticalAlignment="Center" Margin="5" Content="Добавить точку" Command="{Binding AddPrimitive}" CommandParameter="{x:Static enums:PrimitiveType.Point}"/>
+        </StackPanel>
+        <Button Grid.Row="2" VerticalAlignment="Center" HorizontalAlignment="Right" Margin="5" Content="Рассчитать" Command="{Binding Calculate}"/>
     </Grid>
 </Window>
diff --git a/Windows/MainWindow/MainView.xaml.cs b/Windows/MainWindow/MainView.xaml.cs
index c714a32..936a74e 100644
--- a/Windows/MainWindow/MainView.xaml.cs
+++ b/Windows/MainWindow/MainView.xaml.cs
@@ -6,12 +6,10 @@ namespace StructureHelper.Windows.MainWindow
     public partial class MainView : Window
     {
         public IPrimitiveRepository PrimitiveRepository { get; }
-        public IPrimitiveService PrimitiveService { get; }
 
-        public MainView(IPrimitiveRepository primitiveRepository, IPrimitiveService primitiveService, MainViewModel viewModel)
+        public MainView(IPrimitiveRepository primitiveRepository, MainViewModel viewModel)
         {
             PrimitiveRepository = primitiveRepository;
-            PrimitiveService = primitiveService;
             DataContext = viewModel;
             InitializeComponent();
         }
diff --git a/Windows/MainWindow/MainViewModel.cs b/Windows/MainWindow/MainViewModel.cs
index fc19da5..5975fb0 100644
--- a/Windows/MainWindow/MainViewModel.cs
+++ b/Windows/MainWindow/MainViewModel.cs
@@ -3,21 +3,25 @@ using System.Collections.ObjectModel;
 using System.Linq;
 using System.Windows.Input;
 using StructureHelper.Infrastructure;
+using StructureHelper.Infrastructure.Enums;
 using StructureHelper.Infrastructure.Extensions;
 using StructureHelper.Infrastructure.UI.DataContexts;
 using StructureHelper.MaterialCatalogWindow;
 using StructureHelper.Services;
 using StructureHelper.Windows.ColorPickerWindow;
+using StructureHelper.UnitSystem;
 
 namespace StructureHelper.Windows.MainWindow
 {
     public class MainViewModel : ViewModelBase
     {
-        private IPrimitiveService PrimitiveService { get; }
+        private readonly double scaleRate = 1.1;
+
         private IPrimitiveRepository PrimitiveRepository { get; }
+        private readonly UnitSystemService unitSystemService;
+
         private MainModel Model { get; }
         public ObservableCollection<PrimitiveBase> Primitives { get; set; }
-        public ICommand AddRectangle { get; }
 
         private double panelX, panelY, scrollPanelX, scrollPanelY;
 
@@ -42,85 +46,9 @@ namespace StructureHelper.Windows.MainWindow
             set => OnPropertyChanged(value, ref scrollPanelY);
         }
 
-        private double rectParameterX, rectParameterY, rectParameterWidth, rectParameterHeight;
-
-        public double RectParameterX
-        {
-            get => rectParameterX;
-            set => OnPropertyChanged(value, ref rectParameterX);
-        }
-        public double RectParameterY
-        {
-            get => rectParameterY;
-            set => OnPropertyChanged(value, ref rectParameterY);
-        }
-        public double RectParameterWidth
-        {
-            get => rectParameterWidth;
-            set => OnPropertyChanged(value, ref rectParameterWidth);
-        }
-        public double RectParameterHeight
-        {
-            get => rectParameterHeight;
-            set => OnPropertyChanged(value, ref rectParameterHeight);
-        }
-
-        private double parameterOpacity = 0;
-
-        public double ParameterOpacity
-        {
-            get => parameterOpacity;
-            set
-            {
-                if (value >= 0 && value <= 100)
-                    OnPropertyChanged(value, ref parameterOpacity);
-            }
-        }
-
-        private double pointParameterX, pointParameterY, pointParameterSquare;
-        public double EllipseParameterX
-        {
-            get => pointParameterX;
-            set => OnPropertyChanged(value, ref pointParameterX);
-        }
-
-        public double EllipseParameterY
-        {
-            get => pointParameterY;
-            set => OnPropertyChanged(value, ref pointParameterY);
-        }
-
-        public double EllipseParameterSquare
-        {
-            get => pointParameterSquare;
-            set => OnPropertyChanged(value, ref pointParameterSquare);
-        }
-        private bool elementLock;
-        public bool ElementLock
-        {
-            get => elementLock;
-            set => OnPropertyChanged(value, ref elementLock);
-        }
-
-        private int primitivesCount;
-        public int PrimitivesCount
-        {
-            get => primitivesCount;
-            set => OnPropertyChanged(value, ref primitivesCount);
-        }
-
-        private int primitiveIndex = 1;
-        public int PrimitiveIndex
-        {
-            get => primitiveIndex;
-            set
-            {
-                if (value >= 0 && value <= primitivesCount)
-                    OnPropertyChanged(value, ref primitiveIndex);
-            }
-        }
-
+        public int PrimitivesCount => Primitives.Count;
         private double scaleValue = 1.0;
+
         public double ScaleValue
         {
             get => scaleValue;
@@ -160,42 +88,37 @@ namespace StructureHelper.Windows.MainWindow
             get => yY2;
             set => OnPropertyChanged(value, ref yY2);
         }
-
+        public ICommand AddPrimitive { get; }
         public ICommand LeftButtonDown { get; }
         public ICommand LeftButtonUp { get; }
         public ICommand PreviewMouseMove { get; }
-        
-        public ICommand SetParameters { get; }
         public ICommand ClearSelection { get; }
-        
         public ICommand OpenMaterialCatalog { get; }
         public ICommand OpenMaterialCatalogWithSelection { get; }
+        public ICommand OpenUnitsSystemSettings { get; }
         public ICommand SetColor { get; }
         public ICommand SetInFrontOfAll { get; }
         public ICommand SetInBackOfAll { get; }
         public ICommand ScaleCanvasDown { get; }
         public ICommand ScaleCanvasUp { get; }
-        public ICommand AddEllipse { get; }
+        public ICommand Calculate { get; }
         public ICommand SetPopupCanBeClosedTrue { get; }
         public ICommand SetPopupCanBeClosedFalse { get; }
+        public string UnitsSystemName => unitSystemService.GetCurrentSystem().Name;
 
         private double delta = 0.5;
-        
-        public MainViewModel(MainModel model, IPrimitiveService primitiveService, IPrimitiveRepository primitiveRepository)
+
+        public MainViewModel(MainModel model, IPrimitiveRepository primitiveRepository, UnitSystemService unitSystemService)
         {
-            PrimitiveService = primitiveService;
             PrimitiveRepository = primitiveRepository;
             Model = model;
-
+            this.unitSystemService = unitSystemService;
             CanvasWidth = 1500;
             CanvasHeight = 1000;
             XX2 = CanvasWidth;
             XY1 = CanvasHeight / 2;
             YX1 = CanvasWidth / 2;
             YY2 = CanvasHeight;
-
-            
-            
             LeftButtonUp = new RelayCommand(o =>
             {
                 if (o is Rectangle rect) rect.BorderCaptured = false;
@@ -219,44 +142,15 @@ namespace StructureHelper.Windows.MainWindow
                         rect.PrimitiveHeight = PanelY - rect.Y + 10;
                 }
             });
-            SetParameters = new RelayCommand(o =>
-            {
-                var primitive = Primitives.FirstOrDefault(x => x.ParameterCaptured);
-                if (primitive != null)
-                {
-                    primitive.ElementLock = ElementLock;
-                    primitive.ShowedOpacity = ParameterOpacity;
-                    Primitives.MoveElementToSelectedIndex(primitive, PrimitiveIndex);
-                    foreach (var primitiveDefinition in Primitives)
-                        primitiveDefinition.ShowedZIndex = Primitives.IndexOf(primitiveDefinition) + 1;
-
-                    switch (primitive)
-                    {
-                        case Rectangle rectangle:
-                            rectangle.ShowedX = RectParameterX;
-                            rectangle.ShowedY = RectParameterY;
-                            rectangle.PrimitiveWidth = RectParameterWidth;
-                            rectangle.PrimitiveHeight = RectParameterHeight;
-                            break;
-                        case Point point:
-                            point.Square = EllipseParameterSquare;
-                            point.ShowedX = EllipseParameterX;
-                            point.ShowedY = EllipseParameterY;
-                            break;
-                    }
-                }
-            });
             ClearSelection = new RelayCommand(o =>
             {
-                var primitive = Primitives.FirstOrDefault(x => x.ParamsPanelVisibilty);
+                var primitive = Primitives?.FirstOrDefault(x => x.ParamsPanelVisibilty);
                 if (primitive != null && primitive.PopupCanBeClosed)
                 {
                     primitive.ParamsPanelVisibilty = false;
                     primitive.ParameterCaptured = false;
                 }
             });
-            
-            
             OpenMaterialCatalog = new RelayCommand(o =>
             {
                 var materialCatalogView = new MaterialCatalogView();
@@ -268,6 +162,10 @@ namespace StructureHelper.Windows.MainWindow
                 var materialCatalogView = new MaterialCatalogView(true, primitive);
                 materialCatalogView.ShowDialog();
             });
+            OpenUnitsSystemSettings = new RelayCommand(o =>
+            {
+                OnPropertyChanged(nameof(UnitsSystemName));
+            });
             SetColor = new RelayCommand(o =>
             {
                 var primitive = o as PrimitiveBase;
@@ -287,21 +185,21 @@ namespace StructureHelper.Windows.MainWindow
             {
                 if (!(o is PrimitiveBase primitive)) return;
                 foreach (var primitiveDefinition in Primitives)
-                    if (primitiveDefinition.ShowedZIndex < primitive.ShowedZIndex && primitiveDefinition != primitive)
+                    if (primitiveDefinition != primitive && primitiveDefinition.ShowedZIndex < primitive.ShowedZIndex)
                         primitiveDefinition.ShowedZIndex++;
                 primitive.ShowedZIndex = 1;
                 OnPropertyChanged(nameof(primitive.ShowedZIndex));
             });
+            
             ScaleCanvasDown = new RelayCommand(o =>
             {
-                var scaleRate = 1.1;
                 ScrollPanelX = PanelX;
                 ScrollPanelY = PanelY;
                 ScaleValue *= scaleRate;
             });
+            
             ScaleCanvasUp = new RelayCommand(o =>
             {
-                var scaleRate = 1.1;
                 ScrollPanelX = PanelX;
                 ScrollPanelY = PanelY;
                 ScaleValue /= scaleRate;
@@ -309,20 +207,19 @@ namespace StructureHelper.Windows.MainWindow
 
             Primitives = new ObservableCollection<PrimitiveBase>();
             
-            AddRectangle = new RelayCommand(o =>
+            AddPrimitive = new RelayCommand(o =>
             {
-                var rectangle = new Rectangle(60, 40, YX1, XY1, this);
-                Primitives.Add(rectangle);
-                PrimitivesCount = Primitives.Count;
-                PrimitiveRepository.Add(rectangle);
+                if (!(o is PrimitiveType primitiveType)) return;
+                var primitive = primitiveType == PrimitiveType.Point 
+                    ? (PrimitiveBase) new Point(50, YX1, XY1, this) 
+                    : (PrimitiveBase) new Rectangle(60, 40, YX1, XY1, this);
+                Primitives.Add(primitive);
+                PrimitiveRepository.Add(primitive);
             });
-            
-            AddEllipse = new RelayCommand(o =>
+
+            Calculate = new RelayCommand(o =>
             {
-                var point = new Point(2000, YX1, XY1, this);
-                Primitives.Add(point);
-                PrimitivesCount = Primitives.Count;
-                PrimitiveRepository.Add(point);
+                model.Calculate(-50e3, 0d, 0d);
             });
 
             SetPopupCanBeClosedTrue = new RelayCommand(o =>
@@ -330,6 +227,7 @@ namespace StructureHelper.Windows.MainWindow
                 if (!(o is PrimitiveBase primitive)) return;
                 primitive.PopupCanBeClosed = true;
             });
+
             SetPopupCanBeClosedFalse = new RelayCommand(o =>
             {
                 if (!(o is PrimitiveBase primitive)) return;