Maelstrom

using GameCore;

using UnityEngine;
using UnityEngine.Events;

namespace QuestEngine
{
    public class Maelstrom : MonoBehaviour
    {
        [SerializeField] TrailRenderer trail;
        [SerializeField] UnityEvent onCross;
        private Vector3[] positions;
        Vector3 center;
        float angles;
        [SerializeField] int maxCountPositions = 10;

        void Update ()
        {
            int positionCount = trail.positionCount;
            if (positionCount == 0 || positionCount < maxCountPositions) return;
            positions = new Vector3[positionCount];
            trail.GetPositions (positions);

            for (int i = 0; i < maxCountPositions; i++)
                Debug.DrawRay (positions[i], Vector3.up * 10f, Color.red);

            center = FindCenter (positions);

            // Debug.LogFormat ("center = {0}", center);
            // Debug.Log (positions.Log ());

            Debug.DrawRay (center, Vector3.up * 10f, Color.green);

            Vector3 lastPoint = positions[0];
            for (int i = 1; i < maxCountPositions; i++)
            {
                angles += Vector3.Angle (center - lastPoint, center - positions[i]);

                if (angles >= 360f)
                    onCross.Invoke ();

                lastPoint = positions[i];
            }
            // Debug.LogFormat ("angles = {0}", angles);
            angles = 0;
        }
        public Vector3 FindCenter (Vector3[] positions)
        {
            float minX, maxX, minY, maxY, minZ, maxZ;
            minX = positions[0].x;
            maxX = positions[0].x;
            minY = positions[0].y;
            maxY = positions[0].y;
            minZ = positions[0].z;
            maxZ = positions[0].z;

            foreach (Vector3 pos in positions)
            {
                if (pos.x < minX)
                    minX = pos.x;
                if (pos.x > maxX)
                    maxX = pos.x;
                if (pos.y < minY)
                    minY = pos.y;
                if (pos.y > maxY)
                    maxY = pos.y;
                if (pos.z < minZ)
                    minZ = pos.z;
                if (pos.z > maxZ)
                    maxZ = pos.z;
            }

            // Геометрический центр между всеми объектами.
            Vector3 position = new Vector3 ((minX + maxX) / 2f, (minY + maxY) / 2f, (minZ + maxZ) / 2f);
            return position;
        }
    }

}