public override Vector2?GetValue(Keyframe <Vector2?> keyframe, float keyframeProgress)
        {
            var pathKeyframe = (PathKeyframe)keyframe;
            var path         = pathKeyframe.Path;

            if (path == null || path.Contours.Count == 0)
            {
                return(keyframe.StartValue);
            }

            if (ValueCallback != null)
            {
                return(ValueCallback.GetValueInternal(pathKeyframe.StartFrame.Value, pathKeyframe.EndFrame.Value,
                                                      pathKeyframe.StartValue, pathKeyframe.EndValue, LinearCurrentKeyframeProgress,
                                                      keyframeProgress, Progress));
            }

            if (_pathMeasureKeyframe != pathKeyframe)
            {
                _pathMeasure?.Dispose();
                _pathMeasure         = new PathMeasure(path);
                _pathMeasureKeyframe = pathKeyframe;
            }

            return(_pathMeasure.GetPosTan(keyframeProgress * _pathMeasure.Length));
        }
예제 #2
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        public override Vector2?GetValue(Keyframe <Vector2?> keyframe, float keyframeProgress)
        {
            var pathKeyframe = (PathKeyframe)keyframe;
            var path         = pathKeyframe.Path;

            if (path == null || path.IsEmpty)
            {
                return(keyframe.StartValue);
            }

            if (ValueCallback != null)
            {
                var value = ValueCallback.GetValueInternal(pathKeyframe.StartFrame.Value, pathKeyframe.EndFrame.Value,
                                                           pathKeyframe.StartValue, pathKeyframe.EndValue, LinearCurrentKeyframeProgress,
                                                           keyframeProgress, Progress);
                if (value != null)
                {
                    return(value);
                }
            }

            if (_pathMeasureKeyframe != pathKeyframe)
            {
                _pathMeasure?.Dispose();
                _pathMeasure         = new SKPathMeasure(path);
                _pathMeasureKeyframe = pathKeyframe;
            }
            _pathMeasure.GetPositionAndTangent(keyframeProgress * _pathMeasure.Length, out var pos, out _);
            return(new Vector2(pos.X, pos.Y));
        }
예제 #3
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        public override Vector2?GetValue(Keyframe <Vector2?> keyframe, float keyframeProgress)
        {
            var pathKeyframe = (PathKeyframe)keyframe;
            var path         = pathKeyframe.Path;

            if (path == null || path.Contours.Count == 0)
            {
                return(keyframe.StartValue);
            }

            if (_pathMeasureKeyframe != pathKeyframe)
            {
                _pathMeasure         = new PathMeasure(path);
                _pathMeasureKeyframe = pathKeyframe;
            }

            return(_pathMeasure.GetPosTan(keyframeProgress * _pathMeasure.Length));
        }
예제 #4
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            internal static PathKeyframe NewInstance(JsonObject json, LottieComposition composition, IAnimatableValueFactory <Vector2?> valueFactory)
            {
                var     keyframe = KeyFrameFactory.NewInstance(json, composition, composition.DpScale, valueFactory);
                Vector2?cp1      = null;
                Vector2?cp2      = null;
                var     tiJson   = json.GetNamedArray("ti", null);
                var     toJson   = json.GetNamedArray("to", null);

                if (tiJson != null && toJson != null)
                {
                    cp1 = JsonUtils.PointFromJsonArray(toJson, composition.DpScale);
                    cp2 = JsonUtils.PointFromJsonArray(tiJson, composition.DpScale);
                }

                var pathKeyframe = new PathKeyframe(composition, keyframe.StartValue, keyframe.EndValue, keyframe.Interpolator, keyframe.StartFrame, keyframe.EndFrame);

                var equals = keyframe.EndValue != null && keyframe.StartValue != null && keyframe.StartValue.Equals(keyframe.EndValue);

                if (pathKeyframe.EndValue != null && !equals)
                {
                    pathKeyframe._path = Utils.Utils.CreatePath(keyframe.StartValue.Value, keyframe.EndValue.Value, cp1, cp2);
                }
                return(pathKeyframe);
            }