Unity3d通用工具类之NGUI图集分解
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Unity3d通用工具类之NGUI图集分解
由于最近需要一些美术资源吗,但是无奈自己不会制作UI,所以就打算去网上的项目中直接找几张可以使用的贴图资源。
但是发现这些资源已经被NGUI自带的打包图集工具打包好了,而且原小贴图也已经全部删掉了,只剩下一个预制物。
那么这个预制物里面包含什么呢:
1.一张大图集贴图
2.大贴图的材质球
3.挂上UIAtla脚本的预制物
那么重点来了,我们该如何获取这张大贴图中的小贴图呢?
这里我写了个小插件,我直接在NGUI源代码里面改:
找到NGUI的源代码:UIAtlasMaker
在OnGUI方法里面,我新添加了可以导出贴图的代码:
GUILayout.BeginHorizontal(); { if (tex != null) { if (GUILayout.Button("导出贴图(PNG)",GUILayout.Width(120f))) { string filePath = EditorUtility.SaveFolderPanel("保存贴图到指定文件夹","",""); ExportTexturePNGFromAtlas(filePath, NGUISettings.atlas); } } } GUILayout.EndHorizontal();
ExportTexturePNGFromAtlas():
static void ExportTexturePNGFromAtlas(string folderPath,UIAtlas atlas) { List<UISpriteData> exitSpritesList = atlas.spriteList; Texture2D atlasTexture = NGUIEditorTools.ImportTexture(atlas.texture, true, false, !atlas.premultipliedAlpha); int oldwith = atlasTexture.width; int oldHeight = atlasTexture.height; Color32[] oldPixels = null; foreach (var es in exitSpritesList) { int xmin = Mathf.Clamp(es.x, 0, oldwith); int ymin = Mathf.Clamp(es.y, 0, oldHeight); int newWidth = Mathf.Clamp(es.width, 0, oldwith); int newHeight = Mathf.Clamp(es.height, 0, oldHeight); if (newWidth == 0 || newHeight == 0) continue; if (oldPixels == null) oldPixels = atlasTexture.GetPixels32(); Color32[] newPixels = new Color32[newWidth * newHeight]; for (int y = 0; y < newHeight; ++y) { for (int x = 0; x < newWidth; ++x) { int newIndex = (newHeight - 1 - y) * newWidth + x; int oldIndex = (oldHeight - 1 - (ymin + y)) * oldwith + (xmin + x); newPixels[newIndex] = oldPixels[oldIndex]; } } Texture2D t = new Texture2D(newWidth, newHeight); t.SetPixels32(newPixels); t.Apply(); byte[] bytes = t.EncodeToPNG(); Texture2D.DestroyImmediate(t); t = null; if (!Directory.Exists(folderPath)) { Directory.CreateDirectory(folderPath); } using (FileStream fs = new FileStream(folderPath + "/" + es.name + ".png", FileMode.CreateNew)) { BinaryWriter writer = new BinaryWriter(fs); writer.Write(bytes); } } }
打开NGUI的Atlas Maker:
点击导出贴图,然后会弹出选择保存贴图到哪个文件夹,点击选择文件夹之后,小贴图就导出成功了。