VRCycling/Assets/Scripts/TrafficSimulation/IntersectionSituation/IntersectionPreset.cs

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

namespace TrafficSimulation{
    public class IntersectionPreset : MonoBehaviour
    {
        public TrafficSystem trafficSystem;
        public Intersection intersection;
        public GameObject cars;
        public CarSituationSpawner carSpawner;
        public PresetTrigger triggerIn;
        public PresetTrigger triggerOut;
        public CarPool carPool;
        private bool presetRunning;
        private List<GameObject> activeCars;
        // Start is called before the first frame update
        void Start()
        {
            this.presetRunning = false;
            this.activeCars = new List<GameObject>();
        }

        // Update is called once per frame
        void Update()
        {
            if(triggerIn.checkLastTrigger()){
                HandleInTrigger();
            }

            if(triggerOut.checkLastTrigger()){
                handleOutTrigger();
            }
        }

        /// <summary>
        /// Starts preset it not already running
        /// </summary>
        private void HandleInTrigger(){
            Debug.Log("In Trigger");

            if(this.presetRunning){
                Debug.Log("Preset already running");
                return;
            }
            this.presetRunning = true;
            SpawnCars();
        }
        /// <summary>
        /// Ends the preset if it was running
        /// </summary>
        private void handleOutTrigger(){
            Debug.Log("Out Trigger");
            if(!this.presetRunning){
                Debug.Log("Preset wasn´t running, so couldn´t be ended.");
                return;
            }
            this.presetRunning = false;
            DespawnCars();
        }

        /// <summary>
        /// If Cars are set, they will be spawned on the given positions. If a carSpawner is set, it will be activated
        /// </summary>
        private void SpawnCars(){
            if(this.cars == null){
                Debug.Log("Found no Car Object. Can´t init preset");
                return;
            }else{
                foreach (Transform carSpawn in this.cars.transform)
                {
                    this.activeCars.Add(this.carPool.SpawnCar(carSpawn));
                }
            }
            if(this.carSpawner != null){
                this.carSpawner.StartSpawner();
            }
        }
        /// <summary>
        /// Each car, used from this preset will be despawned, if set the carspawner will be stopped
        /// </summary>
        private void DespawnCars(){
            Debug.Log("despawnCars");
            this.activeCars.ForEach(car => this.carPool.DespawnCar(car));
            this.activeCars.Clear();
            if(this.carSpawner != null){
                this.carSpawner.StopSpawner();
            }
        }
    }

}