rg1/client/Battle/System/MotionSync/MonsterIndicatorSys.cs

using System.Collections.Generic;
using Entitas;
using GAS.Runtime;
using UnityEngine;

namespace CoreGame.Render
{
    public class MonsterIndicatorSys : IExecuteSystem
    {
        private readonly IGroup<CombatEntity> m_MonsterGroup;
        private readonly List<CombatEntity> m_CacheEntities = new List<CombatEntity>();
        private readonly Camera m_Camera;

        public MonsterIndicatorSys(Contexts contexts)
        {
            m_MonsterGroup = contexts.combat.GetGroup(CombatMatcher.Monster);
            m_Camera = Camera.main;
        }

        public void Execute(float deltaTime)
        {
            m_MonsterGroup.GetEntities(m_CacheEntities);
            var closestDis = 999f;
            var closestEid = 0;
            var closestPos = Vector2.zero;
            for (var i = 0; i < m_CacheEntities.Count; i++)
            {
                var monster = m_CacheEntities[i];
                if (monster.TagCountContainer.HasTag(GTagLib.State_Death))
                    continue;

                var screenPos = m_Camera.WorldToViewportPoint(monster.logicTransform.position.ToVector2());

                var isOutOfBounds = screenPos.x < 0 || screenPos.x > 1 || screenPos.y < 0 || screenPos.y > 1;

                if (!isOutOfBounds)
                {
                    closestEid = 0;
                    break;
                }
                var dis = Mathf.Min(
                    Mathf.Min(Mathf.Abs(screenPos.x - 1), screenPos.x),
                    Mathf.Min(Mathf.Abs(screenPos.y - 1), screenPos.y)
                );
                if (!(dis < closestDis)) continue;
                closestDis = dis;
                closestEid = monster.creationIndex;
                closestPos = monster.transformProxy.position;
            }

            if (closestEid == 0)
            {
                CoreUIBridge.CoreGamePushNearestMonsterPos(false, Vector2.zero);
            }
            else
            {
                CoreUIBridge.CoreGamePushNearestMonsterPos(true, closestPos);
            }
        }
    }
}