private void CreateRuntimeObjectsForSpriterObjectRef(Key key, IDictionary<int, ScaledSprite> persistentScaledSprites, SpriterObject SpriterObject, SpriterDataEntityAnimation animation, IDictionary<string, Texture2D> textures, KeyFrame keyFrame, IDictionary<KeyFrameValues, int> SpriterefParentDic, IDictionary<string, ObjectInfo> boxes, IDictionary<int, ScaledPolygon> persistentScaledPolygons, IDictionary<int, SpriterPoint> persistentPoints, Key timelineKeyOverride = null)
        {
            foreach (var objectRef in key.ObjectRef)
            {
                var timeline = animation.Timeline.Single(t => t.Id == objectRef.Timeline);
                Key timelineKey = timelineKeyOverride ?? timeline.Key.Single(k => k.Id == objectRef.Key);
                if (timelineKeyOverride == null && key.Time != timelineKey.Time)
                {
                    var nextTimelineKey = timeline.Key.FirstOrDefault(k => k.Time > key.Time) ??
                                          new Key(timeline.Key.First()) { Time = animation.Length };

                    timelineKey = InterpolateToNewTimelineKey(key, timelineKey, nextTimelineKey);
                }

                if (timeline.ObjectType == "box")
                {
                    ScaledPolygon scaledPolygon;
                    ScaledPositionedObject pivot;
                    var box = boxes[timeline.Name];

                    if (persistentScaledPolygons.ContainsKey(objectRef.Id))
                    {
                        scaledPolygon = persistentScaledPolygons[objectRef.Id];
                        pivot = (ScaledPositionedObject)scaledPolygon.Parent;
                    }
                    else
                    {
                        scaledPolygon = ScaledPolygon.CreateRectangle(timelineKey.Object.X, timelineKey.Object.Y, (int)box.Width, (int)box.Height);
                        scaledPolygon.ParentScaleChangesPosition = false;
                        scaledPolygon.Visible = false;

                        var name = objectRef.Name ?? objectRef.Id.ToString(CultureInfo.InvariantCulture);
                        pivot = new ScaledPositionedObject { Name = string.Format("{0}_pivot", name) };

                        scaledPolygon.Name = timeline.Name;

                        scaledPolygon.AttachTo(pivot, true);
                        pivot.AttachTo(SpriterObject, true);

                        persistentScaledPolygons[objectRef.Id] = scaledPolygon;
                        SpriterObject.ObjectList.Add(scaledPolygon);
                        SpriterObject.ObjectList.Add(pivot);
                    }

                    var values = GetKeyFrameValues(timelineKey, box, objectRef);

                    values.ScaledPolygon.Parent = pivot;
                    if (objectRef.Parent.HasValue)
                    {
                        SpriterefParentDic[values.Pivot] = objectRef.Parent.Value;
                    }
                    else
                    {
                        values.Pivot.Parent = SpriterObject;
                    }

                    keyFrame.Values[pivot] = values.Pivot;
                    keyFrame.Values[scaledPolygon] = values.ScaledPolygon;
                }
                else if (timeline.ObjectType == "point")
                {
                    SpriterPoint point;

                    if (persistentPoints.ContainsKey(objectRef.Id))
                    {
                        point = persistentPoints[objectRef.Id];
                    }
                    else
                    {
                        point = new SpriterPoint
                        {
                            X = timelineKey.Object.X,
                            Y = timelineKey.Object.Y,
                            Name = timeline.Name
                        };
                        SpriterObject.ObjectList.Add(point);
                        persistentPoints[objectRef.Id] = point;
                    }

                    KeyFrameValues values = GetKeyFrameValuesForPoint(timelineKey, objectRef);

                    if (objectRef.Parent.HasValue)
                    {
                        SpriterefParentDic[values] = objectRef.Parent.Value;
                    }
                    else
                    {
                        values.Parent = SpriterObject;
                    }

                    keyFrame.Values[point] = values;
                }
                else if (string.IsNullOrEmpty(timeline.ObjectType))
                {
                    var folderFileId = string.Format("{0}_{1}", timelineKey.Object.Folder,
                        timelineKey.Object.File);
                    var file =
                        this.Folder.First(f => f.Id == timelineKey.Object.Folder)
                            .File.First(f => f.Id == timelineKey.Object.File);

                    ScaledSprite scaledSprite;
                    ScaledPositionedObject pivot;
                    if (persistentScaledSprites.ContainsKey(objectRef.Id))
                    {
                        scaledSprite = persistentScaledSprites[objectRef.Id];
                        pivot = (ScaledPositionedObject) scaledSprite.Parent;
                    }
                    else
                    {
                        var name = objectRef.Name ?? objectRef.Id.ToString(CultureInfo.InvariantCulture);
                        pivot = new ScaledPositionedObject {Name = string.Format("{0}_pivot", name)};

                        scaledSprite = new ScaledSprite
                        {
                            Name = string.Format("{0}_sprite", name),
                            Width = file.Width,
                            Height = file.Height,
                            ParentScaleChangesPosition = false
                        };

                        scaledSprite.AttachTo(pivot, true);
                        pivot.AttachTo(SpriterObject, true);

                        persistentScaledSprites[objectRef.Id] = scaledSprite;
                        SpriterObject.ObjectList.Add(scaledSprite);
                        SpriterObject.ObjectList.Add(pivot);
                    }

                    var values = GetKeyFrameValues(timelineKey, file, textures, folderFileId, objectRef);

                    values.ScaledSprite.Parent = pivot;
                    if (objectRef.Parent.HasValue)
                    {
                        SpriterefParentDic[values.Pivot] = objectRef.Parent.Value;
                    }
                    else
                    {
                        values.Pivot.Parent = SpriterObject;
                    }

                    keyFrame.Values[pivot] = values.Pivot;
                    keyFrame.Values[scaledSprite] = values.ScaledSprite;
                }
            }
        }
        private void HandleUnreferencedTimelinekeys(SpriterDataEntityAnimation animation, SpriterDataEntityAnimationMainline mainline, List<KeyFrame> keyFrameList, IDictionary<int, ScaledSprite> persistentScaledSprites, SpriterObject SpriterObject, IDictionary<string, Texture2D> textures, IDictionary<KeyFrameValues, int> keyFrameValuesParentDictionary, IDictionary<int, SpriterBone> persistentBones, IDictionary<int, ScaledPositionedObject> boneRefDic, IDictionary<string, ObjectInfo> boxes, IDictionary<int, ScaledPolygon> persistentScaledPolygons, IDictionary<int, SpriterPoint> persistentPoints, SpriterDataEntity entity)
        {
            foreach (var timeline in animation.Timeline)
            {
                foreach (var timelineKey in timeline.Key)
                {
                    // if timeline key has an object, and no mainline keys for objects reference this key
                    if (timelineKey.Object != null &&
                        !mainline.Keys.Where(k => k.ObjectRef != null)
                                 .Any(k => k.ObjectRef.Any(r => r.Key == timelineKey.Id && r.Timeline == timeline.Id)) ||
                        timelineKey.Bone != null &&
                        !mainline.Keys.Where(k => k.BoneRef != null)
                                 .Any(k => k.BoneRef.Any(r => r.Key == timelineKey.Id && r.Timeline == timeline.Id)))
                    {
                        int index = keyFrameList.FindLastIndex(kf => Math.Abs(kf.Time - (timelineKey.Time/1000.0f)) < .0001f);
                        if (index > 0)
                        {
                            var keyFrame = new KeyFrame {Time = timelineKey.Time/1000.0f};
                            var mainlineKey = mainline.Keys.Single(k => k.Time == timelineKey.Time);
                            if (mainlineKey.ObjectRef != null && timelineKey.Object != null)
                            {
                                CreateRuntimeObjectsForSpriterObjectRef(mainlineKey, persistentScaledSprites,
                                                                        SpriterObject, animation, textures, keyFrame,
                                                                        keyFrameValuesParentDictionary, boxes, persistentScaledPolygons, persistentPoints, timelineKeyOverride: timelineKey);
                            }

                            if (mainlineKey.BoneRef != null && timelineKey.Bone != null)
                            {
                                CreateRuntimeObjectsForSpriterBoneRef(mainlineKey, persistentBones, SpriterObject,
                                                                      animation, keyFrame, boneRefDic,
                                                                      keyFrameValuesParentDictionary, entity, timelineKey);
                            }
                            keyFrameList.Insert(index, keyFrame);
                        }
                    }
                }
            }
        }
        private static void CreateRuntimeObjectsForSpriterBoneRef(Key key, IDictionary<int, SpriterBone> persistentBones,
                                                                  SpriterObject SpriterObject,
                                                                  SpriterDataEntityAnimation animation, KeyFrame keyFrame,
                                                                  IDictionary<int, ScaledPositionedObject> boneRefDic, IDictionary<KeyFrameValues, int> boneRefParentDic, SpriterDataEntity entity,
                                                                  Key timelineKeyOverride = null)
        {
            IDictionary<int, KeyBone> bones = new Dictionary<int, KeyBone>();

            foreach (var boneRef in key.BoneRef)
            {
                SpriterBone bone;
                var timeline = animation.Timeline.Single(t => t.Id == boneRef.Timeline);

                if (persistentBones.ContainsKey(boneRef.Id))
                {
                    bone = persistentBones[boneRef.Id];
                }
                else
                {
                    var objectInfo = entity.ObjectInfos == null ? (ObjectInfo)null : entity.ObjectInfos.FirstOrDefault(o => o.Type == "bone" && o.Name == timeline.Name);
                    bone = new SpriterBone
                    {
                        Name = timeline.Name,
                        Length = objectInfo == null ? 200 : objectInfo.Width
                    };

                    bone.AttachTo(SpriterObject, true);

                    persistentBones[boneRef.Id] = bone;
                    SpriterObject.ObjectList.Add(bone);
                }

                var timelineKey = timelineKeyOverride ?? timeline.Key.Single(k => k.Id == boneRef.Key);
                if (timelineKeyOverride == null && key.Time != timelineKey.Time)
                {
                    var nextTimelineKey = timeline.Key.FirstOrDefault(k => k.Time > key.Time) ?? new Key(timeline.Key.First()) { Time = animation.Length };

                    timelineKey = InterpolateToNewTimelineKey(key, timelineKey, nextTimelineKey);
                }

                var timelineKeyBone = new KeyBone(timelineKey.Bone);

                bones[boneRef.Id] = timelineKeyBone;

                keyFrame.Values[bone] = new KeyFrameValues
                    {
                        RelativePosition = new Vector3(timelineKeyBone.X, timelineKeyBone.Y, 0.0f),
                        RelativeRotation = new Vector3(0.0f, 0.0f, timelineKeyBone.Angle),
                        RelativeScaleX = timelineKeyBone.ScaleX,
                        RelativeScaleY = timelineKeyBone.ScaleY,
                        Spin = timelineKey.Spin
                    };

                boneRefDic[boneRef.Id] = bone;
                if (boneRef.Parent.HasValue)
                {
                    boneRefParentDic[keyFrame.Values[bone]] = boneRef.Parent.Value;
                }
            }
        }