Unity3D设置纹理格式
- 2020 年 1 月 9 日
- 筆記
1. 简介
在PC上开发时，其天空盒的效果很好，但是为Android平台Build之后，其效果简直没法看。
更为恼火的是，之后PC上的纹理效果也变差了，新加入的纹理效果都会变差，看其纹理格式，使用ETC进行了压缩。
2. Unity3D默认纹理格式问题
2.1 在导入时是否自动压缩
Edit->Preferences…
当选择此选项之后，每当导入新的纹理（无论是拖入或在文件管理器中copy），Unity3D都会根据当前平台的设置进行自动转换，此纹理转换，并不是把纹理文件进行修改，纹理文件是不动的，而是增加了一个.meta文件（如Sunny4_back.tif对应Sunny4_back.tif.meta），其中定义了很多与纹理相关的参数，其中决定此纹理格式的参数为：textureType，此文件内容如下：
fileFormatVersion: 2 guid: e658bdd655d56c64eb2bf011d186cded TextureImporter: serializedVersion: 2 mipmaps: mipMapMode: 0 enableMipMap: 1 linearTexture: 0 correctGamma: 0 fadeOut: 0 borderMipMap: 0 mipMapFadeDistanceStart: 1 mipMapFadeDistanceEnd: 3 bumpmap: convertToNormalMap: 0 externalNormalMap: 0 heightScale: .25 normalMapFilter: 0 isReadable: 0 grayScaleToAlpha: 0 generateCubemap: 0 seamlessCubemap: 0 textureFormat: 4 maxTextureSize: 1024 textureSettings: filterMode: -1 aniso: -1 mipBias: -1 wrapMode: -1 nPOTScale: 1 lightmap: 0 compressionQuality: 50 spriteMode: 0 spriteExtrude: 1 spriteMeshType: 1 alignment: 0 spritePivot: {x: .5, y: .5} spriteBorder: {x: 0, y: 0, z: 0, w: 0} spritePixelsToUnits: 100 alphaIsTransparency: 0 textureType: -1 buildTargetSettings: [] spriteSheet: sprites: [] spritePackingTag: userData:
2.2 Unity3D设置纹理格式
1) 选中纹理，纹理的Inspector窗口如下图所示：
上图显示的为Default设置，若Android平台没有单独设置， 则此纹理在Anroid平台采用默认设置，若Android平台单独设置了，则采用Android平台设置的格式。Unity3D只能设置三种纹理格式：Compressed、16bits、Truecolor，若要设置其它纹理格式，则Unity3D无能为力。
2.3 在Unity3D中自定义设置纹理格式
把ChangeTextureImportSettings.cs放于Assets/Editor目录下，ChangeTextureImportSettings.cs内容如下：
using UnityEngine; using UnityEditor; // ///////////////////////////////////////////////////////////////////////////////////////////////////////// // // Batch Texture import settings modifier. // // Modifies all selected textures in the project window and applies the requested modification on the // textures. Idea was to have the same choices for multiple files as you would have if you open the // import settings of a single texture. Put this into Assets/Editor and once compiled by Unity you find // the new functionality in Custom -> Texture. Enjoy! :-) // // Based on the great work of benblo in this thread: // http://forum.unity3d.com/viewtopic.php?t=16079&start=0&postdays=0&postorder=asc&highlight=textureimporter // // Developed by Martin Schultz, Decane in August 2009 // e-mail: ms@decane.net // // Updated for Unity 3.0 by col000r in August 2010 // http://col000r.blogspot.com // // ///////////////////////////////////////////////////////////////////////////////////////////////////////// public class ChangeTextureImportSettingsUnity3 : ScriptableObject { [MenuItem ("Custom/Texture/Change Texture Format/Auto Compressed")] static void ChangeTextureFormat_AutoCompressed() { SelectedChangeTextureFormatSettings(TextureImporterFormat.AutomaticCompressed); } [MenuItem ("Custom/Texture/Change Texture Format/Auto 16bit")] static void ChangeTextureFormat_Auto16Bit() { SelectedChangeTextureFormatSettings(TextureImporterFormat.Automatic16bit); } [MenuItem ("Custom/Texture/Change Texture Format/Auto Truecolor")] static void ChangeTextureFormat_AutoTruecolor() { SelectedChangeTextureFormatSettings(TextureImporterFormat.AutomaticTruecolor); } [MenuItem ("Custom/Texture/Change Texture Format/RGB Compressed DXT1")] static void ChangeTextureFormat_RGB_DXT1() { SelectedChangeTextureFormatSettings(TextureImporterFormat.DXT1); } [MenuItem ("Custom/Texture/Change Texture Format/RGB Compressed DXT5")] static void ChangeTextureFormat_RGB_DXT5() { SelectedChangeTextureFormatSettings(TextureImporterFormat.DXT5); } [MenuItem ("Custom/Texture/Change Texture Format/RGB 16 bit")] static void ChangeTextureFormat_RGB_16bit() { SelectedChangeTextureFormatSettings(TextureImporterFormat.RGB16); } [MenuItem ("Custom/Texture/Change Texture Format/RGB 24 bit")] static void ChangeTextureFormat_RGB_24bit() { SelectedChangeTextureFormatSettings(TextureImporterFormat.RGB24); } [MenuItem ("Custom/Texture/Change Texture Format/Alpha 8 bit")] static void ChangeTextureFormat_Alpha_8bit() { SelectedChangeTextureFormatSettings(TextureImporterFormat.Alpha8); } [MenuItem ("Custom/Texture/Change Texture Format/ARGB 16 bit")] static void ChangeTextureFormat_RGBA_16bit() { SelectedChangeTextureFormatSettings(TextureImporterFormat.ARGB16); } [MenuItem ("Custom/Texture/Change Texture Format/RGBA 32 bit")] static void ChangeTextureFormat_RGBA_32bit() { SelectedChangeTextureFormatSettings(TextureImporterFormat.RGBA32); } [MenuItem ("Custom/Texture/Change Texture Format/ARGB 32 bit")] static void ChangeTextureFormat_ARGB_32bit() { SelectedChangeTextureFormatSettings(TextureImporterFormat.ARGB32); } [MenuItem ("Custom/Texture/Change Texture Format/RGB PVRTC 2bit")] static void ChangeTextureFormat_RGB_PVRTC_2bit() { SelectedChangeTextureFormatSettings(TextureImporterFormat.PVRTC_RGB2); } [MenuItem ("Custom/Texture/Change Texture Format/RGBA PVRTC 2bit")] static void ChangeTextureFormat_RGBA_PVRTC_2bit() { SelectedChangeTextureFormatSettings(TextureImporterFormat.PVRTC_RGBA2); } [MenuItem ("Custom/Texture/Change Texture Format/RGB PVRTC 4bit")] static void ChangeTextureFormat_RGB_PVRTC_4bit() { SelectedChangeTextureFormatSettings(TextureImporterFormat.PVRTC_RGB4); } [MenuItem ("Custom/Texture/Change Texture Format/RGBA PVRTC 4bit")] static void ChangeTextureFormat_RGBA_PVRTC_4bit() { SelectedChangeTextureFormatSettings(TextureImporterFormat.PVRTC_RGBA4); } // ---------------------------------------------------------------------------- [MenuItem ("Custom/Texture/Change Texture Size/Change Max Texture Size/32")] static void ChangeTextureSize_32() { SelectedChangeMaxTextureSize(32); } [MenuItem ("Custom/Texture/Change Texture Size/Change Max Texture Size/64")] static void ChangeTextureSize_64() { SelectedChangeMaxTextureSize(64); } [MenuItem ("Custom/Texture/Change Texture Size/Change Max Texture Size/128")] static void ChangeTextureSize_128() { SelectedChangeMaxTextureSize(128); } [MenuItem ("Custom/Texture/Change Texture Size/Change Max Texture Size/256")] static void ChangeTextureSize_256() { SelectedChangeMaxTextureSize(256); } [MenuItem ("Custom/Texture/Change Texture Size/Change Max Texture Size/512")] static void ChangeTextureSize_512() { SelectedChangeMaxTextureSize(512); } [MenuItem ("Custom/Texture/Change Texture Size/Change Max Texture Size/1024")] static void ChangeTextureSize_1024() { SelectedChangeMaxTextureSize(1024); } [MenuItem ("Custom/Texture/Change Texture Size/Change Max Texture Size/2048")] static void ChangeTextureSize_2048() { SelectedChangeMaxTextureSize(2048); } // ---------------------------------------------------------------------------- [MenuItem ("Custom/Texture/Change MipMap/Enable MipMap")] static void ChangeMipMap_On() { SelectedChangeMimMap(true); } [MenuItem ("Custom/Texture/Change MipMap/Disable MipMap")] static void ChangeMipMap_Off() { SelectedChangeMimMap(false); } // ---------------------------------------------------------------------------- [MenuItem ("Custom/Texture/Change Non Power of 2/None")] static void ChangeNPOT_None() { SelectedChangeNonPowerOf2(TextureImporterNPOTScale.None); } [MenuItem ("Custom/Texture/Change Non Power of 2/ToNearest")] static void ChangeNPOT_ToNearest() { SelectedChangeNonPowerOf2(TextureImporterNPOTScale.ToNearest); } [MenuItem ("Custom/Texture/Change Non Power of 2/ToLarger")] static void ChangeNPOT_ToLarger() { SelectedChangeNonPowerOf2(TextureImporterNPOTScale.ToLarger); } [MenuItem ("Custom/Texture/Change Non Power of 2/ToSmaller")] static void ChangeNPOT_ToSmaller() { SelectedChangeNonPowerOf2(TextureImporterNPOTScale.ToSmaller); } // ---------------------------------------------------------------------------- [MenuItem ("Custom/Texture/Change Is Readable/Enable")] static void ChangeIsReadable_Yes() { SelectedChangeIsReadable(true); } [MenuItem ("Custom/Texture/Change Is Readable/Disable")] static void ChangeIsReadable_No() { SelectedChangeIsReadable(false); } //Unity3D教程手册：www.unitymanual.com // ---------------------------------------------------------------------------- static void SelectedChangeIsReadable(bool enabled) { Object[] textures = GetSelectedTextures(); Selection.objects = new Object[0]; foreach (Texture2D texture in textures) { string path = AssetDatabase.GetAssetPath(texture); TextureImporter textureImporter = AssetImporter.GetAtPath(path) as TextureImporter; textureImporter.isReadable = enabled; AssetDatabase.ImportAsset(path); } } static void SelectedChangeNonPowerOf2(TextureImporterNPOTScale npot) { Object[] textures = GetSelectedTextures(); Selection.objects = new Object[0]; foreach (Texture2D texture in textures) { string path = AssetDatabase.GetAssetPath(texture); TextureImporter textureImporter = AssetImporter.GetAtPath(path) as TextureImporter; textureImporter.npotScale = npot; AssetDatabase.ImportAsset(path); } } static void SelectedChangeMimMap(bool enabled) { Object[] textures = GetSelectedTextures(); Selection.objects = new Object[0]; foreach (Texture2D texture in textures) { string path = AssetDatabase.GetAssetPath(texture); TextureImporter textureImporter = AssetImporter.GetAtPath(path) as TextureImporter; textureImporter.mipmapEnabled = enabled; AssetDatabase.ImportAsset(path); } } //Unity3D教程手册：www.unitymanual.com static void SelectedChangeMaxTextureSize(int size) { Object[] textures = GetSelectedTextures(); Selection.objects = new Object[0]; foreach (Texture2D texture in textures) { string path = AssetDatabase.GetAssetPath(texture); TextureImporter textureImporter = AssetImporter.GetAtPath(path) as TextureImporter; textureImporter.maxTextureSize = size; AssetDatabase.ImportAsset(path); } } static void SelectedChangeTextureFormatSettings(TextureImporterFormat newFormat) { Object[] textures = GetSelectedTextures(); Selection.objects = new Object[0]; foreach (Texture2D texture in textures) { string path = AssetDatabase.GetAssetPath(texture); //Debug.Log("path: " + path); TextureImporter textureImporter = AssetImporter.GetAtPath(path) as TextureImporter; textureImporter.textureFormat = newFormat; AssetDatabase.ImportAsset(path); } } static Object[] GetSelectedTextures() { return Selection.GetFiltered(typeof(Texture2D), SelectionMode.DeepAssets); } }
以上代码参考：Unity3d：批量修改贴图导入设置工具脚本
然后，Unity3D界面如下：
在Project窗口中选中需要设置的纹理（可多选），然后点菜单命令执行对应的转换即可。
