| // Copyright 2013 The Flutter Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #ifndef FLUTTER_IMPELLER_SCENE_ANIMATION_PROPERTY_RESOLVER_H_ |
| #define FLUTTER_IMPELLER_SCENE_ANIMATION_PROPERTY_RESOLVER_H_ |
| |
| #include <memory> |
| #include <string> |
| #include <vector> |
| |
| #include "flutter/fml/hash_combine.h" |
| #include "flutter/fml/macros.h" |
| #include "impeller/base/timing.h" |
| #include "impeller/geometry/matrix_decomposition.h" |
| #include "impeller/geometry/quaternion.h" |
| #include "impeller/geometry/scalar.h" |
| #include "impeller/geometry/vector.h" |
| #include "impeller/scene/animation/animation_transforms.h" |
| |
| namespace impeller { |
| namespace scene { |
| |
| class Node; |
| class TranslationTimelineResolver; |
| class RotationTimelineResolver; |
| class ScaleTimelineResolver; |
| |
| class PropertyResolver { |
| public: |
| static std::unique_ptr<TranslationTimelineResolver> MakeTranslationTimeline( |
| std::vector<Scalar> times, |
| std::vector<Vector3> values); |
| |
| static std::unique_ptr<RotationTimelineResolver> MakeRotationTimeline( |
| std::vector<Scalar> times, |
| std::vector<Quaternion> values); |
| |
| static std::unique_ptr<ScaleTimelineResolver> MakeScaleTimeline( |
| std::vector<Scalar> times, |
| std::vector<Vector3> values); |
| |
| virtual ~PropertyResolver(); |
| |
| virtual SecondsF GetEndTime() = 0; |
| |
| /// @brief Resolve and apply the property value to a target node. This |
| /// operation is additive; a given node property may be amended by |
| /// many different PropertyResolvers prior to rendering. For example, |
| /// an AnimationPlayer may blend multiple Animations together by |
| /// applying several AnimationClips. |
| virtual void Apply(AnimationTransforms& target, |
| SecondsF time, |
| Scalar weight) = 0; |
| }; |
| |
| class TimelineResolver : public PropertyResolver { |
| public: |
| virtual ~TimelineResolver(); |
| |
| // |Resolver| |
| SecondsF GetEndTime(); |
| |
| protected: |
| struct TimelineKey { |
| /// The index of the closest previous keyframe. |
| size_t index = 0; |
| /// Used to interpolate between the resolved values for `timeline_index - 1` |
| /// and `timeline_index`. The range of this value should always be `0>N>=1`. |
| Scalar lerp = 1; |
| }; |
| TimelineKey GetTimelineKey(SecondsF time); |
| |
| std::vector<Scalar> times_; |
| }; |
| |
| class TranslationTimelineResolver final : public TimelineResolver { |
| public: |
| ~TranslationTimelineResolver(); |
| |
| // |Resolver| |
| void Apply(AnimationTransforms& target, |
| SecondsF time, |
| Scalar weight) override; |
| |
| private: |
| TranslationTimelineResolver(); |
| |
| std::vector<Vector3> values_; |
| |
| TranslationTimelineResolver(const TranslationTimelineResolver&) = delete; |
| |
| TranslationTimelineResolver& operator=(const TranslationTimelineResolver&) = |
| delete; |
| |
| friend PropertyResolver; |
| }; |
| |
| class RotationTimelineResolver final : public TimelineResolver { |
| public: |
| ~RotationTimelineResolver(); |
| |
| // |Resolver| |
| void Apply(AnimationTransforms& target, |
| SecondsF time, |
| Scalar weight) override; |
| |
| private: |
| RotationTimelineResolver(); |
| |
| std::vector<Quaternion> values_; |
| |
| RotationTimelineResolver(const RotationTimelineResolver&) = delete; |
| |
| RotationTimelineResolver& operator=(const RotationTimelineResolver&) = delete; |
| |
| friend PropertyResolver; |
| }; |
| |
| class ScaleTimelineResolver final : public TimelineResolver { |
| public: |
| ~ScaleTimelineResolver(); |
| |
| // |Resolver| |
| void Apply(AnimationTransforms& target, |
| SecondsF time, |
| Scalar weight) override; |
| |
| private: |
| ScaleTimelineResolver(); |
| |
| std::vector<Vector3> values_; |
| |
| ScaleTimelineResolver(const ScaleTimelineResolver&) = delete; |
| |
| ScaleTimelineResolver& operator=(const ScaleTimelineResolver&) = delete; |
| |
| friend PropertyResolver; |
| }; |
| |
| } // namespace scene |
| } // namespace impeller |
| |
| #endif // FLUTTER_IMPELLER_SCENE_ANIMATION_PROPERTY_RESOLVER_H_ |