OnPreprocessTexture not setting the spritePivot correctly?

I am automating the texture2d imports to set the Sprite's Pivot from Center to Bottom.

Code (csharp):

1. textureImporter.spritePivot = new Vector2(0.5f, 0f);

I then checked the meta file, which appears to be correct. However, back in the editor, the texture import settings remain as Center! It does not show Custom or anything else. When I drag the texture into scene, the pivot point is still center!

Is there something I must do to "refresh" it or is this a bug?

 

I have the same issue. If you view/modify the meta data for the file, you'll notice that what you really want to change for the sprites "pivot" is called "alignment" in the meta file. Unfortunately, there does not seem to be any "alignment" property of the TextureImporter. I'm about to break down and modify the meta file directly. Any one know better?

 

I've managed to solved it. I am not near my computer now but I'll post the codes later. Post here again to remind me if I don't reply within 24 hours.

 

Hello @CyberMew,

How did you solve this? I am trying to do the same, except I am setting the pivot to Bottom Left, which should be new Vector2(0f, 0f). The pivot will not change from Center however.

Thanks!

 

I solved it 2 days after I posted the question. I found out that you cannot directly adjust the value, and you have to do so using another variable. I cannot remember it off the top of my head, and am not sure if there are any changes with the newer Unity versions since I haven't been touching it for a few months now, but anyway I'll post the code snippet tomorrow - it's 12am here. Remind me again if I don't!

 

Okay, sounds good; I really appreciate it @CyberMew !

 

Here you go, hope it helps..

TextureImporter textureImporter = assetImporter as TextureImporter;

TextureImporterSettings tis = new TextureImporterSettings();
textureImporter.ReadTextureSettings(tis);
// your Custom settings
tis.spriteMode = 1;
tis.spritePixelsToUnits = 72f;
tis.spritePivot = new Vector2(0.5f, 0.5f);
tis.spriteExtrude = 1;
tis.filterMode = FilterMode.Point;
tis.wrapMode = TextureWrapMode.Clamp;
textureImporter.textureType = TextureImporterType.Sprite;

textureImporter.SetTextureSettings(tis);

 

Unfortunately the sprite pivot still doesn't get set with this code. Perhaps they changed something with the newer versions of Unity. It's not a big deal thankfully, as I've already imported most of my textures.

I'll submit a bug report on this issue.

Thanks for taking the time to find the code though!

 

This one worked for me:

Code (CSharp):

1.     void setPivotsBottom()
2.     {
3.         Object[] textures = Selection.GetFiltered(typeof(Texture2D), SelectionMode.DeepAssets);
4.         foreach(Texture2D tex in textures) {
5.             string path = AssetDatabase.GetAssetPath(tex);
6.             TextureImporter textureImporter = AssetImporter.GetAtPath(path) as TextureImporter;
7.             TextureImporterSettings settings = new TextureImporterSettings();
8.             textureImporter.ReadTextureSettings(settings);
9.             settings.spriteAlignment = (int)SpriteAlignment.BottomCenter;
10.             textureImporter.SetTextureSettings(settings);
11.             AssetDatabase.ImportAsset(path, ImportAssetOptions.ForceUpdate);
12.         }
13.     }

 

See

I'm trying to get this to work for me but I guess the spritePivot setting literally just doesn't get saved. Anything outside of a pivot of (0.5f, 0.5f) doesn't work, it just always defaults to (0.5f, 0.5f)

I'm trying to get a pivot of (0.5f, 0.08f), but none of the many suggestions I've seen everywhere I've looked have worked.

And using the alignment setting won't work for me either because I don't want to set the pivot to any of the preset pivots in the alignment settings.

 

I guess to better help people understand what I'm dealing with, this is my code. I'm essentially trying to set the names of all sprites in spritesheets for easy referencing and setup using the LPC spritesheets found here http://gaurav.munjal.us/Universal-LPC-Spritesheet-Character-Generator/ to test.

Everything works fine except for setting the pivot. The pivots are always .5, .5 no matter what I do. The debugs even show the correct information at all steps.

Code (CSharp):

1. using UnityEngine;
2. using UnityEditor;
3. using System.Collections;
4. using System.Collections.Generic;
5.  
6. public class NameSpritesAutomatically : MonoBehaviour {
7.     [MenuItem("Sprites/Rename Sprites")]
8.     static void SetSpriteNames() {
9.         int[] FramesCount = new int[] { 6, 7, 8, 5, 12, 5};
10.         string[] FramesName = new string[] { "cast", "stab", "walk", "slash", "bow", "die" };
11.      
12.         foreach (Texture2D texture in Resources.LoadAll<Texture2D>("LPC/")) {
13.             Slice(texture, FramesCount, FramesName);
14.         }
15.     }
16.  
17.     static void Slice(Texture2D texture, int[] framesCount, string[] framesName) {
18.         int animAmount = framesCount.Length;
19.         string path = AssetDatabase.GetAssetPath(texture);
20.         TextureImporter texImporter = AssetImporter.GetAtPath(path) as TextureImporter;
21.  
22.         int uRow = 0;
23.         int lRow = 1;
24.         int dRow = 2;// 24;
25.         int rRow = 3;// 36;
26.  
27.         texImporter.isReadable = true;
28.  
29.         List<SpriteMetaData> newData = new List<SpriteMetaData>();
30.  
31.         for (int y = 0; y < animAmount; y++) {
32.             int row = y * 4;
33.             for (int x = 1; x < framesCount[y] + 1; x++) {
34.                 if (framesName[y] == "die") {
35.                     newData.Add(SliceRow(texture, framesName[y], x, row + uRow, ""));
36.                 } else {
37.                     newData.Add(SliceRow(texture, framesName[y], x, row + uRow, "_u"));
38.                     newData.Add(SliceRow(texture, framesName[y], x, row + dRow, "_d"));
39.                     newData.Add(SliceRow(texture, framesName[y], x, row + lRow, "_l"));
40.                     newData.Add(SliceRow(texture, framesName[y], x, row + rRow, "_r"));
41.                 }
42.             }
43.         }
44.  
45.         Debug.Log(newData.Count);
46.         for (int i = 0; i < newData.Count; i++) {
47.             Debug.Log(newData[i].name);
48.             Debug.Log(newData[i].pivot);
49.         }
50.  
51.         TextureImporterSettings texImporterSettings = new TextureImporterSettings();
52.         texImporter.ReadTextureSettings(texImporterSettings);
53.         texImporterSettings.spritePixelsPerUnit = 64f;
54.         texImporterSettings.spritePivot = new Vector2(0.5f, 0.08f); ;
55.         texImporterSettings.spriteMode = 1;
56.         texImporterSettings.spriteExtrude = 1;
57.         texImporterSettings.filterMode = FilterMode.Point;
58.         texImporterSettings.wrapMode = TextureWrapMode.Clamp;
59.         texImporterSettings.textureType = TextureImporterType.Sprite;
60.         texImporter.SetTextureSettings(texImporterSettings);
61.  
62.         if (texImporter.spriteImportMode == SpriteImportMode.Multiple) {
63.             // Bug? Need to convert to single then back to multiple in order to make changes when it's already sliced
64.             texImporter.spriteImportMode = SpriteImportMode.Single;
65.             AssetDatabase.ImportAsset(path, ImportAssetOptions.ForceUpdate);
66.         }
67.  
68.         texImporter.spriteImportMode = SpriteImportMode.Multiple;
69.         texImporter.spritesheet = newData.ToArray();
70.         AssetDatabase.ImportAsset(path, ImportAssetOptions.ForceUpdate);
71.     }
72.  
73.     static SpriteMetaData SliceRow(Texture2D texture, string frameName, int x, int row, string appendix) {
74.         Debug.Log(texture.name + " : " + frameName + " : " + x + " : " + row + " : " + appendix);
75.         int SliceWidth = 64;
76.         int SliceHeight = 64;
77.  
78.         Vector2 pivot = new Vector2(0.5f, 0.08f);
79.  
80.         SpriteMetaData smd = new SpriteMetaData();
81.         smd.pivot = pivot;
82.         smd.name = frameName + appendix + "_" + (x);
83.         Debug.Log(smd.pivot);
84.         smd.rect = new Rect(x * SliceWidth, texture.height - row * SliceHeight - SliceHeight, SliceWidth, SliceHeight);
85.  
86.         return smd;
87.     }
88. }

 

I figured it out after coming back to it months later and seeing some other threads.

You have to add

texImporterSettings.spriteAlignment = (int)SpriteAlignment.Custom;

to first set the importer to custom pivots

then in your spritemetadata you have to set

smd.alignment = 9;

Here's the working code if you need to see it in use.

Code (CSharp):

1. using UnityEngine;
2. using UnityEditor;
3. using System.Collections;
4. using System.Collections.Generic;
5. using System.IO;
6.  
7. public class NameSpritesAutomatically : MonoBehaviour {
8.    
9.     static string ignoreListPath = "Assets/Resources/Editor/spriteSliceIgnoreList.txt";
10.     static char ignoreListSplitSeperator = '%';
11.  
12.     [MenuItem("Sprites/Rename Sprites")]
13.     static void SetSpriteNames() {
14.         List<string> ignoreList = ReadSpriteSheetIgnoreList();
15.  
16.         int[] FramesCount = new int[] { };
17.         string[] FramesName = new string[] { };
18.  
19.         string ignoreListString = "";
20.         foreach (Texture2D texture in Resources.LoadAll<Texture2D>("LPC/")) {
21.             bool bOversize = false;
22.             if (texture.width == 1152) {
23.                 FramesCount = Constants.OversizeFramesCount; //new int[] { 5 };
24.                 FramesName = Constants.OversizeFramesName; //new string[] { "slash" };
25.                 bOversize = true;
26.             } else {
27.                 FramesCount = Constants.FramesCount; //new int[] { 6, 7, 8, 5, 12, 5 };
28.                 FramesName = Constants.FramesName;    //new string[] { "cast", "stab", "walk", "slash", "bow", "die" };              
29.             }
30.  
31.             bool bIgnore = false;
32.             for (int i = 0; i < ignoreList.Count; i++)
33.                 if (ignoreList[i] == texture.name)
34.                     bIgnore = true;
35.             if (!bIgnore)
36.                 Slice(texture, FramesCount, FramesName, bOversize);
37.  
38.             ignoreListString += texture.name + ignoreListSplitSeperator;
39.         }
40.  
41.         WriteSpriteSheetIgnoreList(ignoreListString);
42.     }
43.  
44.     static void Slice(Texture2D texture, int[] framesCount, string[] framesName, bool bOversize) {
45.         int animAmount = framesCount.Length;
46.         string path = AssetDatabase.GetAssetPath(texture);
47.         TextureImporter texImporter = AssetImporter.GetAtPath(path) as TextureImporter;
48.  
49.         int sliceWidth = Constants.sliceWidth;    //64;
50.         int sliceHeight = Constants.sliceHeight; //64;
51.         if (bOversize) {
52.             sliceWidth = Constants.oversizeSliceWidth;  //192;
53.             sliceHeight = Constants.oversizeSliceHeight;  //192;
54.         }
55.  
56.         int uRow = Constants.uRow;
57.         int lRow = Constants.lRow;
58.         int dRow = Constants.dRow;// 24;
59.         int rRow = Constants.rRow;// 36;
60.  
61.         texImporter.isReadable = true;
62.  
63.         List<SpriteMetaData> newData = new List<SpriteMetaData>();
64.  
65.         for (int y = 0; y < animAmount; y++) {
66.             int row = y * 4;
67.             for (int x = 1; x < framesCount[y] + 1; x++) {
68.                 if (framesName[y] == "die") {
69.                     newData.Add(SliceRow(texture, framesName[y], x, row + uRow, ""));
70.                 } else {
71.                     newData.Add(SliceRow(texture, framesName[y], x, row + uRow, "_u", sliceWidth, sliceHeight));
72.                     newData.Add(SliceRow(texture, framesName[y], x, row + dRow, "_d", sliceWidth, sliceHeight));
73.                     newData.Add(SliceRow(texture, framesName[y], x, row + lRow, "_l", sliceWidth, sliceHeight));
74.                     newData.Add(SliceRow(texture, framesName[y], x, row + rRow, "_r", sliceWidth, sliceHeight));
75.                 }
76.             }
77.         }
78.  
79.         TextureImporterSettings texImporterSettings = new TextureImporterSettings();
80.         texImporter.ReadTextureSettings(texImporterSettings);
81.         texImporterSettings.spriteAlignment = (int)SpriteAlignment.Custom;
82.         texImporter.SetTextureSettings(texImporterSettings);
83.         texImporterSettings.spritePixelsPerUnit = 32;
84.         texImporterSettings.spritePivot = new Vector2(0.5f, 0.08f); ;
85.         texImporterSettings.spriteMode = 1;
86.         texImporterSettings.spriteExtrude = 1;
87.         texImporterSettings.spriteMeshType = SpriteMeshType.FullRect;
88.         texImporterSettings.filterMode = FilterMode.Point;
89.         texImporterSettings.wrapMode = TextureWrapMode.Clamp;
90.         texImporterSettings.textureType = TextureImporterType.Sprite;
91.         texImporter.SetTextureSettings(texImporterSettings);
92.  
93.         if (texImporter.spriteImportMode == SpriteImportMode.Multiple) {
94.             // Bug? Need to convert to single then back to multiple in order to make changes when it's already sliced
95.             texImporter.spriteImportMode = SpriteImportMode.Single;
96.             AssetDatabase.ImportAsset(path, ImportAssetOptions.ForceUpdate);
97.         }
98.  
99.         texImporter.spriteImportMode = SpriteImportMode.Multiple;
100.         texImporter.spritesheet = newData.ToArray();
101.         AssetDatabase.ImportAsset(path, ImportAssetOptions.ForceUpdate);
102.     }
103.  
104.     static SpriteMetaData SliceRow(Texture2D texture, string frameName, int x, int row, string appendix, int sliceWidth = 64, int sliceHeight = 64) {
105.         Debug.Log(texture.name + " : " + frameName + " : " + x + " : " + row + " : " + appendix);
106.  
107.         Vector2 pivot = new Vector2(0.5f, 0.08f);
108.  
109.         SpriteMetaData smd = new SpriteMetaData();
110.         smd.alignment = 9;
111.         smd.pivot = pivot;
112.         smd.name = frameName + appendix + "_" + (x);
113.         Debug.Log(smd.pivot);
114.         smd.rect = new Rect(x * sliceWidth, texture.height - row * sliceHeight - sliceHeight, sliceWidth, sliceHeight);
115.  
116.         return smd;
117.     }
118.  
119.  
120.  
121.     static void WriteSpriteSheetIgnoreList(string ignoreListString) {
122.         //Write some text to the test.txt file
123.         StreamWriter writer = new StreamWriter(ignoreListPath, false);
124.         writer.WriteLine(ignoreListString);
125.         writer.Close();
126.  
127.         //Re-import the file to update the reference in the editor
128.         AssetDatabase.ImportAsset(ignoreListPath);
129.         TextAsset asset = Resources.Load("Editor/spriteSliceIgnoreList") as TextAsset;
130.  
131.         //Print the text from the file
132.         Debug.Log(asset.text);
133.     }
134.  
135.     static List<string> ReadSpriteSheetIgnoreList() {
136.         //Read the text from directly from the test.txt file
137.         StreamReader reader = new StreamReader(ignoreListPath);
138.         List<string> ignoreList = new List<string>(reader.ReadToEnd().Split(ignoreListSplitSeperator));
139.         reader.Close();
140.  
141.         return ignoreList;
142.     }
143.  
144.     [MenuItem("Sprites/Clear Ignore List")]
145.     static void ClearSpriteSheetIgnoreList() {
146.         WriteSpriteSheetIgnoreList(" ");
147.     }
148. }

 

Thank you!