Initial commit

Library/PackageCache/com.unity.2d.animation@3.2.6/Runtime/Triangle/Topology/DCEL/HalfEdge.cs

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+// -----------------------------------------------------------------------
+// <copyright file="HalfEdge.cs">
+// Triangle.NET code by Christian Woltering, http://triangle.codeplex.com/
+// </copyright>
+// -----------------------------------------------------------------------
+
+namespace UnityEngine.U2D.Animation.TriangleNet
+    .Topology.DCEL
+{
+    internal class HalfEdge
+    {
+        internal int id;
+        internal int mark;
+
+        internal Vertex origin;
+        internal Face face;
+        internal HalfEdge twin;
+        internal HalfEdge next;
+
+        /// <summary>
+        /// Gets or sets the half-edge id.
+        /// </summary>
+        public int ID
+        {
+            get { return id; }
+            set { id = value; }
+        }
+
+        public int Boundary
+        {
+            get { return mark; }
+            set { mark = value; }
+        }
+
+        /// <summary>
+        /// Gets or sets the origin of the half-edge.
+        /// </summary>
+        public Vertex Origin
+        {
+            get { return origin; }
+            set { origin = value; }
+        }
+
+        /// <summary>
+        /// Gets or sets the face connected to the half-edge.
+        /// </summary>
+        public Face Face
+        {
+            get { return face; }
+            set { face = value; }
+        }
+
+        /// <summary>
+        /// Gets or sets the twin of the half-edge.
+        /// </summary>
+        public HalfEdge Twin
+        {
+            get { return twin; }
+            set { twin = value; }
+        }
+
+        /// <summary>
+        /// Gets or sets the next pointer of the half-edge.
+        /// </summary>
+        public HalfEdge Next
+        {
+            get { return next; }
+            set { next = value; }
+        }
+
+        /// <summary>
+        /// Initializes a new instance of the <see cref="HalfEdge" /> class.
+        /// </summary>
+        /// <param name="origin">The origin of this half-edge.</param>
+        public HalfEdge(Vertex origin)
+        {
+            this.origin = origin;
+        }
+
+        /// <summary>
+        /// Initializes a new instance of the <see cref="HalfEdge" /> class.
+        /// </summary>
+        /// <param name="origin">The origin of this half-edge.</param>
+        /// <param name="face">The face connected to this half-edge.</param>
+        public HalfEdge(Vertex origin, Face face)
+        {
+            this.origin = origin;
+            this.face = face;
+
+            // IMPORTANT: do not remove the (face.edge == null) check!
+            if (face != null && face.edge == null)
+            {
+                face.edge = this;
+            }
+        }
+
+        public override string ToString()
+        {
+            return string.Format("HE-ID {0} (Origin = VID-{1})", id, origin.id);
+        }
+    }
+}