Creates a new sprite sheet from an _image and a sprite sheet jsonDefinition
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var mySpriteSheet = new SpriteSheet(myImage, jsonString);
Source
SpriteSheet(this._image, String jsonDefinition) { assert(_image != null); assert(jsonDefinition != null); JsonDecoder decoder = new JsonDecoder(); Map<dynamic, dynamic> file = decoder.convert(jsonDefinition); assert(file != null); List<dynamic> frames = file["frames"]; for (Map<dynamic, dynamic> frameInfo in frames) { String fileName = frameInfo["filename"]; Rect frame = _readJsonRect(frameInfo["frame"]); bool rotated = frameInfo["rotated"]; bool trimmed = frameInfo["trimmed"]; Rect spriteSourceSize = _readJsonRect(frameInfo["spriteSourceSize"]); Size sourceSize = _readJsonSize(frameInfo["sourceSize"]); Point pivot = _readJsonPoint(frameInfo["pivot"]); Texture texture = new Texture._fromSpriteFrame(_image, fileName, sourceSize, rotated, trimmed, frame, spriteSourceSize, pivot); _textures[fileName] = texture; } }