Sprite animation using mesh.uv. Batches = 999, DrawCall = 1

Hi. My english not very good.
I recently started learning unity3d. I needed to animated sprite. Searched the internet and wrote this code. I think this code help for beginners.

Code (csharp):

1. using UnityEngine;
2. using System.Collections;
3. using System.Collections.Generic;
4.  
5. [ExecuteInEditMode]
6. [AddComponentMenu("Sprites/Animation sprite")]
7. [RequireComponent(typeof(MeshFilter))]
8. [RequireComponent(typeof(MeshRenderer))]
9.  
10. public class AnimationSprite : MonoBehaviour
11. {
12.     private MeshFilter meshFilter;
13.     private MeshRenderer meshRenderer;
14.  
15.     private string materialName;
16.     private Vector2 size = Vector2.one;
17.     private Vector2 center = Vector2.one / 2;
18.     private Vector2 tileSizeInPixel;
19.     private Rect tileRect;
20.  
21.     private Vector2 materialTextureSize;
22.  
23.     //static variables
24.     private Vector2 textureScale;
25.     private int totalTiles;
26.     private int fps = 30;
27.     private Vector2[] textureCoods;
28.  
29.     private static Dictionary<string, Material> materialList = new Dictionary<string, Material>();
30.  
31.     public static AnimationSprite Create(GameObject gameObject, string materialName)
32.     {
33.         return Create(gameObject, materialName, Vector2.one);
34.     }
35.  
36.     public static AnimationSprite Create(GameObject gameObject, string materialName, Vector2 size)
37.     {
38.         return Create(gameObject, materialName, size, Rect.MinMaxRect(0, 0, 0, 0), Vector2.zero, 0);
39.     }
40.  
41.     public static AnimationSprite Create(GameObject gameObject, string materialName,
42.         Vector2 size, Rect tileRect, Vector2 tileSizeInPixel, int fps)
43.     {
44.         AnimationSprite animSprite = gameObject.AddComponent(typeof(AnimationSprite)) as AnimationSprite;
45.         animSprite.size = size;
46.         animSprite.materialName = materialName;
47.         animSprite.tileRect = tileRect;
48.         animSprite.tileSizeInPixel = tileSizeInPixel;
49.         animSprite.fps = fps;
50.  
51.         return animSprite;
52.     }
53.  
54.     void Awake()
55.     {
56.         meshFilter = base.GetComponent(typeof(MeshFilter)) as MeshFilter;
57.         meshRenderer = base.GetComponent(typeof(MeshRenderer)) as MeshRenderer;
58.         meshRenderer.castShadows = false;
59.         meshRenderer.receiveShadows = false;
60.     }
61.  
62.     // Use this for initialization
63.     void Start()
64.     {
65.         //Load material
66.         //meshRenderer.sharedMaterial = Resources.Load(materialName, typeof(Material)) as Material;
67.         meshRenderer.sharedMaterial = GetMaterial(materialName);
68.  
69.         //Get texture size
70.         Texture2D texture2D = meshRenderer.sharedMaterial.GetTexture("_MainTex") as Texture2D;
71.         materialTextureSize = new Vector2(texture2D.width, texture2D.height);
72.  
73.         //Create mesh
74.         meshFilter.mesh = CreateMesh(size, center, Rect.MinMaxRect(0, 0, 1, 1));
75.         textureCoods = (Vector2[])meshFilter.mesh.uv;
76.  
77.         totalTiles = (int)(tileRect.width  * tileRect.height);
78.  
79.         if (tileSizeInPixel.x != 0  tileSizeInPixel.y != 0  totalTiles > 1)
80.         {
81.             //Calculate static variables
82.             textureScale = new Vector2(tileSizeInPixel.x / materialTextureSize.x, tileSizeInPixel.y / materialTextureSize.y);
83.             //meshRenderer.sharedMaterial.SetTextureScale("_MainTex", textureScale);
84.         }
85.     }
86.  
87.     // Update is called once per frame
88.     void Update()
89.     {
90.         if (tileSizeInPixel.x != 0  tileSizeInPixel.y != 0  totalTiles > 1)
91.             SetSpriteAnimation();
92.     }
93.  
94.     void SetSpriteAnimation()
95.     {
96.         int index = (int)(Time.time * fps);
97.  
98.         index = index % totalTiles;
99.  
100.         int uIndex = (int)(index % tileRect.width);
101.         int vIndex = (int)(index / tileRect.width);
102.  
103.         float offsetX = (uIndex + tileRect.xMin) * textureScale.x;
104.         float offsetY = (vIndex + tileRect.yMin) * textureScale.y;
105.         /*
106.         Vector2 offset = new Vector2(offsetX, offsetY);
107.         renderer.material.SetTextureOffset("_MainTex", offset);*/
108.  
109.         /*
110.         Rect textureCoords = new Rect(offsetX, offsetY, textureScale.x, textureScale.y);
111.         var uv = new[]
112.         {
113.             new Vector2(textureCoords.xMin, 1 - textureCoords.yMax),
114.             new Vector2(textureCoords.xMin, 1 - textureCoords.yMin),
115.             new Vector2(textureCoords.xMax, 1 - textureCoords.yMin),
116.             new Vector2(textureCoords.xMax, 1 - textureCoords.yMax)
117.         };
118.         */
119.  
120.         textureCoods[0].x = offsetX;
121.         textureCoods[0].y = 1 - (offsetY + textureScale.y);
122.  
123.         textureCoods[1].x = offsetX;
124.         textureCoods[1].y = 1 - offsetY;
125.  
126.         textureCoods[2].x = offsetX + textureScale.x;
127.         textureCoods[2].y = 1 - offsetY;
128.  
129.         textureCoods[3].x = offsetX + textureScale.x;
130.         textureCoods[3].y = 1 - (offsetY + textureScale.y);
131.  
132.         meshFilter.mesh.uv = textureCoods;
133.     }
134.  
135.     private static Material GetMaterial(string materialName)
136.     {
137.         if (materialList.ContainsKey(materialName))
138.             return materialList[materialName];
139.  
140.         return materialList[materialName] = Resources.Load(materialName, typeof(Material)) as Material;
141.     }
142.  
143.     private static Mesh CreateMesh(Vector2 size, Vector2 center, Rect textureCoords)
144.     {
145.         var vertices = new[] {
146.             new Vector3(0, 0, 0),
147.             new Vector3(0, size.y, 0),
148.             new Vector3(size.x, size.y, 0),
149.             new Vector3(size.x, 0, 0)
150.         };
151.  
152.         Vector3 shift = Vector2.Scale(center, size);
153.         for (int i = 0; i < vertices.Length; i++)
154.         {
155.             vertices[i] -= shift;
156.         }
157.  
158.         var uv = new[]
159.         {
160.             new Vector2(textureCoords.xMin, 1 - textureCoords.yMax),
161.             new Vector2(textureCoords.xMin, 1 - textureCoords.yMin),
162.             new Vector2(textureCoords.xMax, 1 - textureCoords.yMin),
163.             new Vector2(textureCoords.xMax, 1 - textureCoords.yMax)
164.         };
165.  
166.         var triangles = new[]
167.         {
168.             0, 1, 2,
169.             0, 2, 3
170.         };
171.  
172.         return new Mesh { vertices = vertices, uv = uv, triangles = triangles };
173.     }
174. }
175.  

Use. In another script

Code (csharp):

1. void Start()
2.     {
3.         GameObject rootObject = new GameObject() { name = "Root anim" };
4.  
5.         for (int i = 0; i < 500; i++)
6.         {
7.             GameObject gameObject = new GameObject() { name = "AnimationObject1-" + i.ToString() };
8.             gameObject.transform.Translate(Random.Range(-50, 50), Random.Range(100, -100), 0);
9.             gameObject.transform.parent = rootObject.transform;
10.             AnimationSprite.Create(gameObject, "SmileMaterial", Vector2.one * 2, new Rect(0, 0, 4, 4), new Vector2(128, 128), Random.Range(1, 50));
11.  
12.             GameObject gameObject2 = new GameObject() { name = "AnimationObject2-" + i.ToString() };
13.             AnimationSprite.Create(gameObject2, "SmileMaterial", Vector2.one, new Rect(0, 4, 4, 2), new Vector2(150, 150), 10);
14.             gameObject2.transform.Translate(Random.Range(-50, 50), Random.Range(100, -100), 0);
15.             gameObject2.transform.parent = rootObject.transform;
16.         }
17.  
18.         MeshRenderer rootMeshRenderer = (rootObject.AddComponent(typeof(MeshRenderer)) as MeshRenderer);
19.         rootMeshRenderer.castShadows = false;
20.         rootMeshRenderer.receiveShadows = false;
21. }

Results. On PC

Code (csharp):

1. FPS ~= 80
2. Objects = 1000
3. DrawCall = 2 (1 for GUI)
4. Batches = 999

On Galaxy S

Code (csharp):

1. FPS ~= 40
2. Objects = 1000
3. DrawCall = 2 (1 for GUI)