NGUI支持TexturePacker导出有旋转的Sprite,无需Transform旋转版本

在 ulua&tolua技术交流群①中群号 341746602，有位大神分析了一份让NGUI图集支持旋转sprite的技术帖子。

传送门：http://www.maosongliang.com/archives/324?bsh_bid=1506423853

近几天潜心研究了下，发现一个很蛋疼问题。第一点sprite渲染出来不是旋转好的，虽然大神写了自动旋转的代码，但是遇到旋转之后的Sprite当一个旋转节点的子节点的时候，出了各种问题。同时遇到Anchor自适应的时候也是各种搞。

于是想到一个解决方案，基于绘制区域的选择，而不是基于transform

贴上c#代码（利用ulua群中毛松亮大神的代码之处仍然保留其注释）

读取配置部分

UISpriteData.cs

    // [Modify] by maosongliang, begin    public bool rotated = false;    // [Modify] by maosongliang, end

NGUIJson.cs

static void LoadSpriteData (UIAtlas atlas, Hashtable decodedHash){if (decodedHash == null || atlas == null) return;List<UISpriteData> oldSprites = atlas.spriteList;atlas.spriteList = new List<UISpriteData>();Hashtable frames = (Hashtable)decodedHash["frames"];foreach (System.Collections.DictionaryEntry item in frames){UISpriteData newSprite = new UISpriteData();newSprite.name = item.Key.ToString();bool exists = false;// Check to see if this sprite existsforeach (UISpriteData oldSprite in oldSprites){if (oldSprite.name.Equals(newSprite.name, StringComparison.OrdinalIgnoreCase)){exists = true;break;}}// Get rid of the extension if the sprite doesn't exist// The extension is kept for backwards compatibility so it's still possible to update older atlases.if (!exists){newSprite.name = newSprite.name.Replace(".png", "");newSprite.name = newSprite.name.Replace(".tga", "");}// Extract the info we need from the TexturePacker json file, mainly uvRect and sizeHashtable table = (Hashtable)item.Value;Hashtable frame = (Hashtable)table["frame"];int frameX = int.Parse(frame["x"].ToString());int frameY = int.Parse(frame["y"].ToString());int frameW = int.Parse(frame["w"].ToString());int frameH = int.Parse(frame["h"].ToString());            // [Modify] by maosongliang, begin            // Read the rotation value            newSprite.rotated = (bool)table["rotated"];            // [Modify] by maosongliang, end            newSprite.x = frameX;newSprite.y = frameY;            newSprite.width = frameW;            newSprite.height = frameH;            // Support for trimmed sprites            Hashtable sourceSize = (Hashtable)table["sourceSize"];Hashtable spriteSize = (Hashtable)table["spriteSourceSize"];if (spriteSize != null && sourceSize != null){// TODO: Account for rotated spritesif (frameW > 0){int spriteX = int.Parse(spriteSize["x"].ToString());int spriteW = int.Parse(spriteSize["w"].ToString());int sourceW = int.Parse(sourceSize["w"].ToString());newSprite.paddingLeft = spriteX;newSprite.paddingRight = sourceW - (spriteX + spriteW);}if (frameH > 0){int spriteY = int.Parse(spriteSize["y"].ToString());int spriteH = int.Parse(spriteSize["h"].ToString());int sourceH = int.Parse(sourceSize["h"].ToString());newSprite.paddingTop = spriteY;newSprite.paddingBottom = sourceH - (spriteY + spriteH);}}            // [Modify] by maosongliang, begin            if (newSprite.rotated)            {                int temp = newSprite.width;                newSprite.width = newSprite.height;                newSprite.height = temp;                temp = newSprite.paddingLeft;                newSprite.paddingLeft = newSprite.paddingTop;                newSprite.paddingTop = temp;                temp = newSprite.paddingRight;                newSprite.paddingRight = newSprite.paddingBottom;                newSprite.paddingBottom = temp;            }            // [Modify] by maosongliang, end            // If the sprite was present before, see if we can copy its inner rect            foreach (UISpriteData oldSprite in oldSprites){if (oldSprite.name.Equals(newSprite.name, StringComparison.OrdinalIgnoreCase)){newSprite.borderLeft = oldSprite.borderLeft;newSprite.borderRight = oldSprite.borderRight;newSprite.borderBottom = oldSprite.borderBottom;newSprite.borderTop = oldSprite.borderTop;}}// Add this new spriteatlas.spriteList.Add(newSprite);}// Sort imported sprites alphabeticallyatlas.spriteList.Sort(CompareSprites);Debug.Log("Imported " + atlas.spriteList.Count + " sprites");}

UIBasicSprite.cs

//modify by Amumu beginprivate Quaternion vertsAngle = Quaternion.Euler(0, 180, -90);protected bool rotated = false;//modify by Amumu endprotected void Fill (BetterList<Vector3> verts, BetterList<Vector2> uvs, BetterList<Color32> cols, Rect outer, Rect inner){mOuterUV = outer;mInnerUV = inner;switch (type){case Type.Simple:SimpleFill(verts, uvs, cols);break;case Type.Sliced:SlicedFill(verts, uvs, cols);break;case Type.Filled:FilledFill(verts, uvs, cols);break;case Type.Tiled:TiledFill(verts, uvs, cols);break;case Type.Advanced:AdvancedFill(verts, uvs, cols);break;}//modify by Amumu beginif (rotated) {Vector4 v = drawingDimensions;float centerX = v.x + v.z;float centerY = v.y + v.w;for (int i = 0; i < verts.size; i++) {Vector3 vert = vertsAngle * verts[i];vert.x += centerY;vert.y += centerX;verts[i] = vert;}}//modify by Amumu end}

UISprite.cs

public override Vector4 drawingDimensions{get{                   .....//modify by Amumu begin                        if(rotated){    return new Vector4(vw, vx, vy, vz);                        }                        else{    return new Vector4(vx, vy, vz, vw);                           }//modify by Amumu end}}protected void SetAtlasSprite (UISpriteData sp){mChanged = true;mSpriteSet = true;if (sp != null){mSprite = sp;mSpriteName = mSprite.name;//modify by Amumu beginrotated = mSprite.rotated;//modify by Amumu end}else{mSpriteName = (mSprite != null) ? mSprite.name : "";mSprite = sp;}}public override void MakePixelPerfect (){if (!isValid) return;base.MakePixelPerfect();if (mType == Type.Tiled) return;UISpriteData sp = GetAtlasSprite();if (sp == null) return;Texture tex = mainTexture;if (tex == null) return;if (mType == Type.Simple || mType == Type.Filled || !sp.hasBorder){if (tex != null){int x = Mathf.RoundToInt(pixelSize * (sp.width + sp.paddingLeft + sp.paddingRight));int y = Mathf.RoundToInt(pixelSize * (sp.height + sp.paddingTop + sp.paddingBottom));if ((x & 1) == 1) ++x;if ((y & 1) == 1) ++y;//modify by Amumu beginif (mSprite != null && mSprite.rotated) {int tmp = x;x = y;y = tmp;}//modify by Amumu endwidth = x;height = y;}}}