1 #ifndef DALI_INTERNAL_KEY_FRAME_CHANNEL_H
2 #define DALI_INTERNAL_KEY_FRAME_CHANNEL_H
5 * Copyright (c) 2019 Samsung Electronics Co., Ltd.
7 * Licensed under the Apache License, Version 2.0 (the "License");
8 * you may not use this file except in compliance with the License.
9 * You may obtain a copy of the License at
11 * http://www.apache.org/licenses/LICENSE-2.0
13 * Unless required by applicable law or agreed to in writing, software
14 * distributed under the License is distributed on an "AS IS" BASIS,
15 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
16 * See the License for the specific language governing permissions and
17 * limitations under the License.
22 #include <dali/internal/event/animation/progress-value.h>
23 #include <dali/public-api/animation/animation.h>
24 #include <dali/public-api/common/vector-wrapper.h>
31 class KeyFrameChannelBase
34 enum KeyFrameChannelId
36 Translate, Rotate, Scale,
39 KeyFrameChannelBase(KeyFrameChannelId channel_id)
40 : mChannelId(channel_id)
44 virtual ~KeyFrameChannelBase()
48 KeyFrameChannelId GetId() const
53 virtual bool IsActive(float progress) = 0;
56 KeyFrameChannelId mChannelId;
61 class KeyFrameChannel : public KeyFrameChannelBase
64 using ProgressValues = std::vector<ProgressValue<V> >;
66 KeyFrameChannel(KeyFrameChannelId channel_id, ProgressValues& values )
67 : KeyFrameChannelBase(channel_id),
73 ~KeyFrameChannel() override
77 bool IsActive (float progress) override;
79 V GetValue(float progress, Dali::Animation::Interpolation interpolation) const;
81 bool FindInterval(typename ProgressValues::iterator& start,
82 typename ProgressValues::iterator& end,
83 float progress) const;
85 ProgressValues& mValues;
89 bool KeyFrameChannel<V>::IsActive (float progress)
94 ProgressValue<V>& first = mValues.front();
96 if( progress >= first.GetProgress() )
105 * Use a linear search to find the interval containing progress
108 bool KeyFrameChannel<V>::FindInterval(
109 typename ProgressValues::iterator& start,
110 typename ProgressValues::iterator& end,
111 float progress) const
114 typename std::vector<ProgressValue<V> >::iterator iter = mValues.begin();
115 typename std::vector<ProgressValue<V> >::iterator prevIter = iter;
117 while(iter != mValues.end() && iter->GetProgress() <= progress)
123 if(iter == mValues.end())
129 if(prevIter->GetProgress() <= progress
131 iter->GetProgress() > progress)
142 V KeyFrameChannel<V>::GetValue (float progress, Dali::Animation::Interpolation interpolation) const
144 ProgressValue<V>& firstPV = mValues.front();
146 typename std::vector<ProgressValue<V> >::iterator start;
147 typename std::vector<ProgressValue<V> >::iterator end;
149 V interpolatedV = firstPV.GetValue();
150 if(progress >= mValues.back().GetProgress() )
152 interpolatedV = mValues.back().GetValue(); // This should probably be last value...
154 else if(FindInterval(start, end, progress))
156 float frameProgress = (progress - start->GetProgress()) / (end->GetProgress() - start->GetProgress());
158 if( interpolation == Dali::Animation::LINEAR )
160 Interpolate(interpolatedV, start->GetValue(), end->GetValue(), frameProgress);
164 //Calculate prev and next values
166 if( start != mValues.begin() )
168 prev = (start-1)->GetValue();
172 //Project next value through start point
173 prev = start->GetValue() + (start->GetValue()-(start+1)->GetValue());
177 if( end != mValues.end()-1)
179 next = (end+1)->GetValue();
183 //Project prev value through end point
184 next = end->GetValue() + (end->GetValue()-(end-1)->GetValue());
187 CubicInterpolate(interpolatedV, prev, start->GetValue(), end->GetValue(), next, frameProgress);
191 return interpolatedV;
194 using KeyFrameChannelNumber = KeyFrameChannel<float>;
195 using KeyFrameChannelVector2 = KeyFrameChannel<Vector2>;
196 using KeyFrameChannelVector3 = KeyFrameChannel<Vector3>;
197 using KeyFrameChannelVector4 = KeyFrameChannel<Vector4>;
198 using KeyFrameChannelQuaternion = KeyFrameChannel<Quaternion>;
199 using KeyFrameChannelAngleAxis = KeyFrameChannel<AngleAxis>;
204 #endif // DALI_INTERNAL_KEY_FRAME_CHANNEL_H