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Assets/JMO Assets/WarFX/Scripts/WFX_BulletHoleDecal.cs

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+using UnityEngine;
+using System.Collections;
+
+/**
+ *	Handles the bullet hole decals:
+ *	- Sets a random frame
+ *	- Fades the material according to the defined lifetime
+ *	- Optionally rotates the decal
+ *	
+ *	(c) 2015, Jean Moreno
+**/
+
+[RequireComponent(typeof(MeshFilter))]
+public class WFX_BulletHoleDecal : MonoBehaviour
+{
+	static private Vector2[] quadUVs = new Vector2[]{new Vector2(0,0), new Vector2(0,1), new Vector2(1,0), new Vector2(1,1)};
+	
+	public float lifetime = 10f;
+	public float fadeoutpercent = 80;
+	public Vector2 frames;
+	public bool randomRotation = false;
+	public bool deactivate = false;
+	
+	private float life;
+	private float fadeout;
+	private Color color;
+	private float orgAlpha;
+	
+	void Awake()
+	{
+		color = this.GetComponent<Renderer>().material.GetColor("_TintColor");
+		orgAlpha = color.a;
+	}
+	
+	void OnEnable()
+	{
+		//Random UVs
+		int random = Random.Range(0, (int)(frames.x*frames.y));
+		int fx = (int)(random%frames.x);
+		int fy = (int)(random/frames.y);
+		//Set new UVs
+		Vector2[] meshUvs = new Vector2[4];
+		for(int i = 0; i < 4; i++)
+		{
+			meshUvs[i].x = (quadUVs[i].x + fx) * (1.0f/frames.x);
+			meshUvs[i].y = (quadUVs[i].y + fy) * (1.0f/frames.y);
+		}
+		this.GetComponent<MeshFilter>().mesh.uv = meshUvs;
+		
+		//Random rotate
+		if(randomRotation)
+			this.transform.Rotate(0f,0f,Random.Range(0f,360f), Space.Self);
+		
+		//Start lifetime coroutine
+		life = lifetime;
+		fadeout = life * (fadeoutpercent/100f);
+		color.a = orgAlpha;
+		this.GetComponent<Renderer>().material.SetColor("_TintColor", color);
+		StopAllCoroutines();
+		StartCoroutine("holeUpdate");
+	}
+	
+	IEnumerator holeUpdate()
+	{
+		while(life > 0f)
+		{
+			life -= Time.deltaTime;
+			if(life <= fadeout)
+			{
+				color.a = Mathf.Lerp(0f, orgAlpha, life/fadeout);
+				this.GetComponent<Renderer>().material.SetColor("_TintColor", color);
+			}
+			
+			yield return null;
+		}
+	}
+}