using UnityEngine;

namespace Artngame.SKYMASTER
{
	public class ParticleShadowsSM : MonoBehaviour
	{
		private Color Start_color;

		public Transform Ref_light;

		public ParticleSystem p2;

		private ParticleSystem.Particle[] ParticleList;

		public bool affectAlpha;

		public bool Debug_on;

		public float Shadow_factor = 0.5f;

		public float Shadow_max_dist = 1000f;

		public Color ShadowColor = new Color(0.5f, 0.5f, 0.5f, 0.5f);

		private int counter;

		private void Start()
		{
			Start_color = p2.main.startColor.color;
		}

		private void Update()
		{
			if (p2 == null)
			{
				Debug.Log("Please insert a particle system");
				return;
			}
			ParticleSystem particleSystem = p2;
			ParticleList = new ParticleSystem.Particle[particleSystem.particleCount];
			particleSystem.GetParticles(ParticleList);
			for (int i = 0; i < ParticleList.Length; i++)
			{
				Vector3 direction = ParticleList[i].position - Ref_light.position;
				Ray ray = new Ray(Ref_light.position, direction);
				ray = new Ray(ParticleList[i].position, -Ref_light.forward);
				if (Debug_on)
				{
					Debug.DrawRay(ParticleList[i].position, -Ref_light.forward);
					Debug.DrawLine(ParticleList[i].position, Ref_light.position);
				}
				RaycastHit hitInfo = default(RaycastHit);
				if (Physics.Raycast(ray.origin, ray.direction, out hitInfo, Shadow_max_dist))
				{
					if (affectAlpha)
					{
						ParticleList[i].startColor = ShadowColor * Shadow_factor;
					}
					else
					{
						float a = (int)ParticleList[i].GetCurrentColor(particleSystem).a;
						ParticleList[i].startColor = ShadowColor * Shadow_factor;
						ParticleList[i].startColor = new Color((int)ParticleList[i].startColor.r, (int)ParticleList[i].startColor.g, (int)ParticleList[i].startColor.b, a);
					}
					if (Debug_on)
					{
						Debug.DrawLine(ParticleList[i].position, hitInfo.point, Color.red, 5f);
					}
				}
				else if (affectAlpha)
				{
					ParticleList[i].startColor = Start_color;
				}
				else
				{
					float a2 = (int)ParticleList[i].GetCurrentColor(particleSystem).a;
					ParticleList[i].startColor = Start_color;
					ParticleList[i].startColor = new Color((int)ParticleList[i].startColor.r, (int)ParticleList[i].startColor.g, (int)ParticleList[i].startColor.b, a2);
				}
				counter++;
				if (counter > ParticleList.Length)
				{
					counter = 0;
				}
			}
			p2.SetParticles(ParticleList, particleSystem.particleCount);
		}
	}
}