Change value diagram calculator

StructureHelperLogics/NdmCalculations/Analyses/ValueDiagrams/Logics/ValueDiagramCheckLogic.cs

@@ -0,0 +1,30 @@
+using StructureHelperCommon.Infrastructures.Exceptions;
+using StructureHelperCommon.Infrastructures.Interfaces;
+
+namespace StructureHelperLogics.NdmCalculations.Analyses.ValueDiagrams.Logics
+{
+    public class ValueDiagramCheckLogic : CheckEntityLogic<IValueDiagram>
+    {
+        private const double minDistance = 1e-3;
+        private bool result;
+
+        public override bool Check()
+        {
+            result = true;
+            if (Entity is null)
+            {
+                string errorString = ErrorStrings.ParameterIsNull + ": value diagram";
+                TraceMessage(errorString);
+                throw new StructureHelperException(errorString);
+            }
+            double dx = Entity.Point2DRange.StartPoint.X - Entity.Point2DRange.EndPoint.X;
+            double dy = Entity.Point2DRange.StartPoint.Y - Entity.Point2DRange.EndPoint.Y;
+            if (Math.Abs(dx) < minDistance && Math.Abs(dy) < minDistance)
+            {
+                result = false;
+                TraceMessage($"Distance between point of diagram is too small");
+            }
+            return result;
+        }
+    }
+}