using UnityEngine;
using System.Collections;
using System.Collections.Generic;


namespace WPM {

    public class Triangle {

        public Point[] points;
        public int getOrderedFlag;

        Point centroid;
        bool centroIdComputed;

        public Triangle(Point point1, Point point2, Point point3, bool register = true) {
            this.points = new Point[] { point1, point2, point3 };
            if (register) {
                point1.RegisterTriangle(this);
                point2.RegisterTriangle(this);
                point3.RegisterTriangle(this);
            }
        }

        public bool IsAdjacentTo(Triangle tri2) {
            // returns true if 2 of the vertices are the same
            bool match = false;
            for (int i = 0; i < 3; i++) {
                Point p1 = points[i];
                for (int j = 0; j < 3; j++) {
                    Point p2 = tri2.points[j];
                    if (p1.x == p2.x && p1.y == p2.y && p1.z == p2.z) {
                        if (match) {
                            return true;
                        }
                        match = true;
                    }
                }
            }
            return false;
        }

        public Point GetCentroid() {
            if (centroIdComputed) {
                return centroid;
            }
            centroIdComputed = true;
            float x = (points[0].x + points[1].x + points[2].x) / 3;
            float y = (points[0].y + points[1].y + points[2].y) / 3;
            float z = (points[0].z + points[1].z + points[2].z) / 3;
            centroid = new Point(x, y, z);
            return centroid;

        }

    }



}