BloodAndGore/Assets/Scripts/Guns/Rocket.cs

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using Saltosion.OneWeapon.Player;
using Saltosion.OneWeapon.Enemies;
using Saltosion.OneWeapon.Effects;
using Saltosion.OneWeapon.Environment;

namespace Saltosion.OneWeapon.Guns {
    [RequireComponent(typeof(Bullet), typeof(CustomLight))]
    public class Rocket : MonoBehaviour {

        public Rigidbody2D Body;
        public GameObject Sprite;

        public ParticleSystem Trail;
        public ParticleSystem Explosion;

        [Range(0, 10)]
        public float ExplodeRadius;

        private float DeathTimer = 0;

        private Bullet Bullet;
        private CustomLight Light;

        void Start() {
            Bullet = GetComponent<Bullet>();
            Light = GetComponent<CustomLight>();

            Vector2 Direction = Bullet.Direction;
            float Rot = Bullet.InitialRotation;

            Body.velocity = Direction * 8;
            Body.rotation = Rot - 90;
            Light.LightIntensity = 1.1f;

            Explosion.Stop();
        }

        void Update() {
            DeathTimer += Time.deltaTime;
            if (DeathTimer > 20) {
                Destroy(gameObject);
            }
            if (DeathTimer > 19) {
                Light.LightIntensity = Mathf.Max(2 - (DeathTimer - 19f) * 10, 0);
            }
        }

        void OnTriggerEnter2D(Collider2D collider) {
            if (collider.GetComponent<PlayerController>() != null) {
                // don't hit the player!
                return;
            }
            Bullet.HasExploded = true;

            Destroy(Sprite);
            Destroy(Body);
            Destroy(GetComponent<CapsuleCollider2D>());
            Explosion.Play();
            Trail.Stop();
            Light.LightSize = 6;
            DeathTimer = 19;

            Bullet.DoDamageAOE(20, ExplodeRadius, 1.5f);
        }

        private void OnDrawGizmosSelected() {
            Gizmos.color = new Color(1.0f, 0.2f, 0.2f, 0.8f);
            Gizmos.DrawWireSphere(transform.position, ExplodeRadius);
        }
    }
}