Vector2 GetPixelSize(tk2dSpriteDefinition def){

        float w = def.untrimmedBoundsData[].x;

        float h = def.untrimmedBoundsData[].y;

                // Calculate dimensions in pixel units

        float pixelWidth = w / def.texelSize.x;

        float pixelHeight = h / def.texelSize.y;

        Vector2 sizeVec = new Vector2(pixelWidth, pixelHeight);

        return sizeVec;

    }