Add primitive visual property

StructureHelperCommon/Models/VisualProperties/IPrimitiveVisualProperty.cs

@@ -0,0 +1,33 @@
+using StructureHelperCommon.Infrastructures.Interfaces;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using System.Windows.Media;
+
+namespace StructureHelperCommon.Models.VisualProperties
+{
+    /// <summary>
+    /// Implements visual settings for graphical primetives
+    /// </summary>
+    public interface IPrimitiveVisualProperty : ISaveable, ICloneable
+    {
+        /// <summary>
+        /// Flag of visibility
+        /// </summary>
+        bool IsVisible { get; set; }
+        /// <summary>
+        /// Color of primitive
+        /// </summary>
+        Color Color { get; set; }
+        /// <summary>
+        /// Index by z-coordinate
+        /// </summary>
+        int ZIndex { get; set; }
+        /// <summary>
+        /// Opacity of filling
+        /// </summary>
+        double Opacity { get; set; }
+    }
+}