How to detect if a sprite in an atlas is used.

[Clovos]

Hey! Is there a way to track if a sprite inside a atlas is used anywhere?
I am in a situation where I know that our biggest atlas contain many sprites that I don't think is used in the game. But our Project is very big so I can't be 100% sure.

Our in house dependency tool does not help me in this case. So I might need to create one myself if necessary.


Cheers!

[ArenMook]

Unfortunately there is nothing built-in that would do this.

[dandrea]

Actually, I wrote a tool to tackle this myself. Feel free to use it at your own risk.
Usage: drop the behavior on a root to all the known sprites, fill in the correct slots and use the behavior's context menu. You'll have a list of used (and how much) or unused sprites.
Remember to drag the prefabs to a root as well, or you might end up thinking that a sprite is unused because it's not on the scene, but it's in a prefab.

1. using UnityEngine;
2. using System.Collections;
3. using System.Collections.Generic;
4. using System;
5.  
6. [System.Serializable]
7. public class SpriteUsage {
8.   public string spriteName;
9.   public int count;
10.   public List<UISprite> sprites;
11. }
12.  
13. public class CheckAtlasUsage : MonoBehaviour {
14.   public bool m_includeInactive = true;
15.   public UIAtlas atlas;
16.   UISprite[] sprites;
17.   public List<SpriteUsage> usageList;
18.  
19.   [ContextMenu("Clear")]
20.   public void ClearSprites() {
21.     usageList = new List<SpriteUsage>();
22.   }
23.  
24.   [ContextMenu("Collect sprite usage")]
25.   public void CollectSprites() {
26.  
27.     sprites = this.gameObject.GetComponentsInChildren<UISprite>(m_includeInactive);
28.     SpriteUsage item;
29.     foreach (UISpriteData sd in atlas.spriteList) {
30.  
31.       item = new SpriteUsage() {
32.         spriteName = sd.name,
33.         count = 0,
34.         sprites = new List<UISprite>()
35.       };
36.       foreach (UISprite s in sprites) {
37.  
38.         if (s.spriteName == item.spriteName) {
39.           item.count++;
40.           item.sprites.Add(s);
41.         }
42.       }
43.       usageList.Add(item);
44.     }
45.   }
46.  
47.   [ContextMenu("Collect only used sprites")]
48.   public void CollectSpritesUsed() {
49.  
50.     sprites = this.gameObject.GetComponentsInChildren<UISprite>(m_includeInactive);
51.     SpriteUsage item;
52.     foreach (UISpriteData sd in atlas.spriteList) {
53.  
54.       item = new SpriteUsage() {
55.         spriteName = sd.name,
56.         count = 0,
57.         sprites = new List<UISprite>()
58.       };
59.       foreach (UISprite s in sprites) {
60.  
61.         if (s.spriteName == item.spriteName) {
62.           item.count++;
63.           item.sprites.Add(s);
64.         }
65.       }
66.       if (item.count > 0)
67.         usageList.Add(item);
68.       else
69.         item = null;
70.     }
71.   }
72.  
73.   [ContextMenu("Collect ununsed sprites")]
74.   public void CollectUnusedSprites() {
75.  
76.     sprites = this.gameObject.GetComponentsInChildren<UISprite>(m_includeInactive);
77.     SpriteUsage item;
78.     foreach (UISpriteData sd in atlas.spriteList) {
79.  
80.       item = new SpriteUsage() {spriteName = sd.name, count = 0};
81.       foreach (UISprite s in sprites)
82.         if (s.spriteName == item.spriteName) item.count++;
83.       if (item.count == 0) usageList.Add (item);
84.     }
85.   }
86. }
87.