115 lines
2.9 KiB
C#
115 lines
2.9 KiB
C#
|
// -----------------------------------------------------------------------
|
||
|
|
// <copyright file="Face.cs">
|
||
|
|
// Triangle.NET code by Christian Woltering, http://triangle.codeplex.com/
|
||
|
|
// </copyright>
|
||
|
|
// -----------------------------------------------------------------------
|
||
|
|
|
||
|
|
namespace UnityEngine.U2D.Animation.TriangleNet
|
||
|
|
.Topology.DCEL
|
||
|
|
{
|
||
|
|
using System.Collections.Generic;
|
||
|
|
using Animation.TriangleNet.Geometry;
|
||
|
|
|
||
|
|
/// <summary>
|
||
|
|
/// A face of DCEL mesh.
|
||
|
|
/// </summary>
|
||
|
|
internal class Face
|
||
|
|
{
|
||
|
|
#region Static initialization of "Outer Space" face
|
||
|
|
|
||
|
|
internal static readonly Face Empty;
|
||
|
|
|
||
|
|
static Face()
|
||
|
|
{
|
||
|
|
Empty = new Face(null);
|
||
|
|
Empty.id = -1;
|
||
|
|
}
|
||
|
|
|
||
|
|
#endregion
|
||
|
|
|
||
|
|
internal int id;
|
||
|
|
internal int mark = 0;
|
||
|
|
|
||
|
|
internal Point generator;
|
||
|
|
|
||
|
|
internal HalfEdge edge;
|
||
|
|
internal bool bounded;
|
||
|
|
|
||
|
|
/// <summary>
|
||
|
|
/// Gets or sets the face id.
|
||
|
|
/// </summary>
|
||
|
|
public int ID
|
||
|
|
{
|
||
|
|
get { return id; }
|
||
|
|
set { id = value; }
|
||
|
|
}
|
||
|
|
|
||
|
|
/// <summary>
|
||
|
|
/// Gets or sets a half-edge connected to the face.
|
||
|
|
/// </summary>
|
||
|
|
public HalfEdge Edge
|
||
|
|
{
|
||
|
|
get { return edge; }
|
||
|
|
set { edge = value; }
|
||
|
|
}
|
||
|
|
|
||
|
|
/// <summary>
|
||
|
|
/// Gets or sets a value, indicating if the face is bounded (for Voronoi diagram).
|
||
|
|
/// </summary>
|
||
|
|
public bool Bounded
|
||
|
|
{
|
||
|
|
get { return bounded; }
|
||
|
|
set { bounded = value; }
|
||
|
|
}
|
||
|
|
|
||
|
|
/// <summary>
|
||
|
|
/// Initializes a new instance of the <see cref="Face" /> class.
|
||
|
|
/// </summary>
|
||
|
|
/// <param name="generator">The generator of this face (for Voronoi diagram)</param>
|
||
|
|
public Face(Point generator)
|
||
|
|
: this(generator, null)
|
||
|
|
{
|
||
|
|
}
|
||
|
|
|
||
|
|
/// <summary>
|
||
|
|
/// Initializes a new instance of the <see cref="Face" /> class.
|
||
|
|
/// </summary>
|
||
|
|
/// <param name="generator">The generator of this face (for Voronoi diagram)</param>
|
||
|
|
/// <param name="edge">The half-edge connected to this face.</param>
|
||
|
|
public Face(Point generator, HalfEdge edge)
|
||
|
|
{
|
||
|
|
this.generator = generator;
|
||
|
|
this.edge = edge;
|
||
|
|
this.bounded = true;
|
||
|
|
|
||
|
|
if (generator != null)
|
||
|
|
{
|
||
|
|
this.id = generator.ID;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
/// <summary>
|
||
|
|
/// Enumerates all half-edges of the face boundary.
|
||
|
|
/// </summary>
|
||
|
|
/// <returns></returns>
|
||
|
|
public IEnumerable<HalfEdge> EnumerateEdges()
|
||
|
|
{
|
||
|
|
var edge = this.Edge;
|
||
|
|
int first = edge.ID;
|
||
|
|
|
||
|
|
do
|
||
|
|
{
|
||
|
|
yield return edge;
|
||
|
|
|
||
|
|
edge = edge.Next;
|
||
|
|
}
|
||
|
|
while (edge.ID != first);
|
||
|
|
}
|
||
|
|
|
||
|
|
public override string ToString()
|
||
|
|
{
|
||
|
|
return string.Format("F-ID {0}", id);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|