PRTriangle.cs

using UnityEngine;
using System.Collections;
namespace PolyReduction{
	public class PRTriangle{
		public int id;
		public PRVertex[] vertex = new PRVertex[3];
		public Vector3 normal;
		public PRTriangle(int id,PRVertex v1,PRVertex v2,PRVertex v3)
		{
			this.id = id;
			vertex [0] = v1;
			vertex [1] = v2;
			vertex [2] = v3;
			ComputeNormal ();
		}
		public void ComputeNormal()
		{
			Vector3 p1 = vertex[1].pos-vertex[0].pos;
			Vector3 p2 = vertex[2].pos-vertex[0].pos;
			normal = Vector3.Cross (p1,p2).normalized;
		}
		public bool HasVertex(PRVertex v)
		{
			if (vertex [0] == v)
				return true;
			if (vertex [1] == v)
				return true;
			if (vertex [2] == v)
				return true;
			return false;
		}
		public void ReplaceVertex(PRVertex u,PRVertex v)
		{
			v.AddFace (this);
			if (vertex [0] == u) {
				vertex [0] = v;
			}
			if (vertex [1] == u) {
				vertex [1] = v;
			}
			if (vertex [2] == u) {
				vertex [2] = v;
			}
			for (int i = 0; i < 3; i++) {
				if (vertex [i].neighbor.Contains (u)) {
					vertex [i].neighbor.Remove (u);
					vertex [i].AddNeighbor(v);
				}
				v.AddNeighbor(vertex [i]);
			}

			ComputeNormal ();
		}
	}
}