標籤:unity 2d
假設有一張png/tga圖集,匯入到Unity,放置目錄"Assets/Resources/UI"(UI檔案夾可替換成其他的,重要的是要在"Assets/Resources/"路徑下),預設為如下設定:
為了可以使用Unity內建的精靈切割,要將紋理類型改成"
Sprite","Sprite Mode"改成"
Multiple","Format"改成"
Truecolor",點擊"Apply"按鈕進行應用。
接著,點擊"Sprite Editor"開啟精靈編輯器,點擊左上方的"Slice"按鈕,彈出切片設定,再次點擊裡面的"Slice"按鈕,就會自動對圖片進行切割,如所示:
在對切割不完整的地方進行修正後,點擊右上方的"Apply"按鈕,進行儲存。可以看到Project視圖下這個圖集,已經被分割出許多小圖了,如所示:
接下來,因為要對圖片進行讀寫操作,要更改圖片的屬性才能進行,否則會提示如下:
- UnityException: Texture ‘testUI‘ is not readable, the texture memory can not be accessed from scripts. You can make the texture readable in the Texture Import Settings.
將圖片紋理類型更改為"
Advanced",將"Read/Write Enabled"屬性進行打勾,如所示:
建立一個指令檔,代碼如下:
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using UnityEngine;
using UnityEditor;
public class TestSaveSprite
{
[MenuItem("Tools/匯出精靈")]
static void SaveSprite()
{
string resourcesPath = "Assets/Resources/";
foreach (Object obj in Selection.objects)
{
string selectionPath = AssetDatabase.GetAssetPath(obj);
// 必須最上級是"Assets/Resources/"
if (selectionPath.StartsWith(resourcesPath))
{
string selectionExt = System.IO.Path.GetExtension(selectionPath);
if (selectionExt.Length == 0)
{
continue;
}
// 從路徑"Assets/Resources/UI/testUI.png"得到路徑"UI/testUI"
string loadPath = selectionPath.Remove(selectionPath.Length - selectionExt.Length);
loadPath = loadPath.Substring(resourcesPath.Length);
// 載入此檔案下的所有資源
Sprite[] sprites = Resources.LoadAll<Sprite>(loadPath);
if (sprites.Length > 0)
{
// 建立匯出檔案夾
string outPath = Application.dataPath + "/outSprite/" + loadPath;
System.IO.Directory.CreateDirectory(outPath);
foreach (Sprite sprite in sprites)
{
// 建立單獨的紋理
Texture2D tex = new Texture2D((int)sprite.rect.width, (int)sprite.rect.height, sprite.texture.format, false);
tex.SetPixels(sprite.texture.GetPixels((int)sprite.rect.xMin, (int)sprite.rect.yMin,
(int)sprite.rect.width, (int)sprite.rect.height));
tex.Apply();
// 寫入成PNG檔案
System.IO.File.WriteAllBytes(outPath + "/" + sprite.name + ".png", tex.EncodeToPNG());
}
Debug.Log("SaveSprite to " + outPath);
}
}
}
Debug.Log("SaveSprite Finished");
}
} |
在Unity編輯器將會看到Tools菜單下多了"匯出精靈"項,選中圖集,然後點擊"匯出精靈"功能表項目,即可匯出子圖成功。如所示:
Unity 匯出切片精靈