using System;
using UnityEngine;

namespace FX
{
	// Token: 0x02000766 RID: 1894
	[RequireComponent(typeof(MeshFilter), typeof(MeshRenderer))]
	public class FX_Polygon_Flag : MonoBehaviour
	{
		// Token: 0x06003054 RID: 12372 RVA: 0x001038F8 File Offset: 0x001038F8
		private void Start()
		{
			this._renderer = base.GetComponent<Renderer>();
			this._meshFilter = base.GetComponent<MeshFilter>();
			this._mesh = new Mesh();
			this._mesh.vertices = this._vertices;
			this._mesh.uv = this._uv;
			this._prevPosition = base.transform.position;
		}

		// Token: 0x06003055 RID: 12373 RVA: 0x0010395C File Offset: 0x0010395C
		private void Update()
		{
			if (this._renderer != null && this._renderer.material != null)
			{
				Vector3 a = this._prevPosition + this._nowChaser;
				this._nowChaser = Vector3.Lerp(a, base.transform.position, this._tailDamper) - base.transform.position;
				this._nowChaser_Rot = Quaternion.Lerp(this._nowChaser_Rot, base.transform.parent.rotation, this._tailDamper);
				this._vertices[1] = base.transform.parent.rotation * this._topPosition;
				this._vertices[2] = this._nowChaser;
				this._vertices[3] = this._nowChaser + this._nowChaser_Rot * this._topPosition;
				float num = Vector3.Distance(Vector3.zero, this._nowChaser);
				float num2 = Vector3.Distance(this._vertices[1], this._vertices[3]);
				float num3 = (num <= num2) ? num2 : num;
				float a2 = Mathf.Clamp01((num3 - this._minLength) / this._visibleLength);
				this._colors[0].a = a2;
				this._colors[1].a = a2;
				this._colors[2].a = a2;
				this._colors[3].a = a2;
				if (num3 > this._minLength)
				{
					this._mesh.vertices = this._vertices;
					this._mesh.colors = this._colors;
					this._mesh.triangles = this._triangles;
					this._meshFilter.sharedMesh = this._mesh;
				}
				else
				{
					this._meshFilter.sharedMesh = null;
				}
				this._prevPosition = base.transform.position;
				base.transform.rotation = Quaternion.identity;
			}
		}

		// Token: 0x04005698 RID: 22168
		[SerializeField]
		[Range(0f, 1f)]
		[Tooltip("この値が高い程 短くなります")]
		private float _tailDamper = 0.2f;

		// Token: 0x04005699 RID: 22169
		[Tooltip("先端の位置(相対)")]
		[SerializeField]
		private Vector3 _topPosition = new Vector3(0f, 0f, 0.6f);

		// Token: 0x0400569A RID: 22170
		[Tooltip("描画される最短距離")]
		[SerializeField]
		private float _minLength = 0.2f;

		// Token: 0x0400569B RID: 22171
		[SerializeField]
		[Tooltip("minLengthから頂点アルファが1になるまでの距離（初期値固定）")]
		private float _visibleLength = 0.3f;

		// Token: 0x0400569C RID: 22172
		private Renderer _renderer;

		// Token: 0x0400569D RID: 22173
		private Vector3 _nowChaser;

		// Token: 0x0400569E RID: 22174
		private Vector3 _prevPosition;

		// Token: 0x0400569F RID: 22175
		private Quaternion _nowChaser_Rot;

		// Token: 0x040056A0 RID: 22176
		private Mesh _mesh;

		// Token: 0x040056A1 RID: 22177
		private int[] _triangles = new int[]
		{
			0,
			1,
			2,
			2,
			1,
			3
		};

		// Token: 0x040056A2 RID: 22178
		private Vector2[] _uv = new Vector2[]
		{
			Vector2.zero,
			Vector2.up,
			Vector2.right,
			Vector2.one
		};

		// Token: 0x040056A3 RID: 22179
		private Color[] _colors = new Color[]
		{
			Color.white,
			Color.white,
			Color.white,
			Color.white
		};

		// Token: 0x040056A4 RID: 22180
		private Vector3[] _vertices = new Vector3[]
		{
			Vector3.zero,
			Vector3.zero,
			Vector3.zero,
			Vector3.zero
		};

		// Token: 0x040056A5 RID: 22181
		private MeshFilter _meshFilter;
	}
}