[Unity] 유니티 스프라이트를 텍스쳐로 바꾸기 Convert Sprite Image to Texture 관련

 

 

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*코드하기전에 주의*

 

읽어야할 리소스가 이메세지가 나온다면

"the texture memory can not be accessed from scripts"

 

해당 리소스의 속성 옵션에서

그림의 1번 그어진부분에 체크박스에 읽기/쓰기 권한을 체크했는지 확인해보자.

 

 

 

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Sprite를 Texture로 바꾸어주는 코드들을 보는중 문제점이 있어 다시 여기저기서 보고 편집하였다.

대강 이거보고 안되면 다른 코드를 찾아서 참조하면 될 것 같다.

public static Texture ConvertSpriteToTexture(Sprite sprite)     {         try         {             if (sprite.rect.width != sprite.texture.width)             {                 int x = Mathf.FloorToInt(sprite.textureRect.x);                 int y = Mathf.FloorToInt(sprite.textureRect.y);                 int width = Mathf.FloorToInt(sprite.textureRect.width);                 int height = Mathf.FloorToInt(sprite.textureRect.height);                 Texture2D newText = new Texture2D(width, height);                 Color[] newColors = sprite.texture.GetPixels(x, y, width, height);                 newText.SetPixels(newColors);                 newText.Apply();                 return newText;             }             else                 return sprite.texture;         }         catch         {             return sprite.texture;         }     }

 

 

 

 

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출처: https://answers.unity.com/questions/651984/convert-sprite-image-to-texture.html

 

 am rendering a GUI.Button which normally takes a Texture but I'd like to load the image for the button from a sprite sheet instead.

I've been digging in code for a while but I can't find a way to cast/convert a sprite to a texture.

 

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So if anyone is looking for the answer: here it is.

First, you have to open your sprite texture in the inspector and change the type from "Sprite" to "Advanced". Then make sure that Read/Write Enabled is checked. Click Apply and now you can read the texture and set it into a new texture like so:

// assume "sprite" is your Sprite object  var croppedTexture = new Texture2D( (int)sprite.rect.width, (int)sprite.rect.height );  var pixels = sprite.texture.GetPixels(  (int)sprite.textureRect.x,                                           (int)sprite.textureRect.y,                                           (int)sprite.textureRect.width,                                           (int)sprite.textureRect.height );  croppedTexture.SetPixels( pixels );  croppedTexture.Apply();

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Here is a static helper method that will give you a texture2D from a sprite. It will even determine if the sprite is part of a single texture or if it is just a single sprite automatically. (basically the same as codeimpossibles answer)

public static Texture2D textureFromSprite(Sprite sprite)       {           if(sprite.rect.width != sprite.texture.width){               Texture2D newText = new Texture2D((int)sprite.rect.width,(int)sprite.rect.height);               Color[] newColors = sprite.texture.GetPixels((int)sprite.textureRect.x,                                                             (int)sprite.textureRect.y,                                                             (int)sprite.textureRect.width,                                                             (int)sprite.textureRect.height );               newText.SetPixels(newColors);               newText.Apply();               return newText;           } else               return sprite.texture;       }

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Your solution is very good, but the code returns a error of pixel count.

resolved using the System.Math.Ceiling for to round the number for up.

Texture2D ConvertSpriteToTexture(Sprite sprite)              {                  try                  {                      if (sprite.rect.width != sprite.texture.width)                      {                          Texture2D newText = new Texture2D((int)sprite.rect.width, (int)sprite.rect.height);                          Color[] colors = newText.GetPixels();                          Color[] newColors = sprite.texture.GetPixels((int)System.Math.Ceiling(sprite.textureRect.x),                                                                       (int)System.Math.Ceiling(sprite.textureRect.y),                                                                       (int)System.Math.Ceiling(sprite.textureRect.width),                                                                       (int)System.Math.Ceiling(sprite.textureRect.height));                          Debug.Log(colors.Length+"_"+ newColors.Length);                          newText.SetPixels(newColors);                          newText.Apply();                          return newText;                      }                      else                          return sprite.texture;                  }catch                  {                      return sprite.texture;                  }              }

 

 

 

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