extrapolation_predictor.h

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/******************************************************************************
 * Copyright 2019 The Apollo Authors. All Rights Reserved.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *****************************************************************************/
 
#pragma once
 
#include <string>
 
#include "modules/prediction/container/obstacles/obstacle_clusters.h"
#include "modules/prediction/predictor/sequence/sequence_predictor.h"
 
namespace apollo {
namespace prediction {
 
class ExtrapolationPredictor : public SequencePredictor {
 public:
  ExtrapolationPredictor();
 
  virtual ~ExtrapolationPredictor() = default;
 
  bool Predict(const ADCTrajectoryContainer* adc_trajectory_container,
               Obstacle* obstacle,
               ObstaclesContainer* obstacles_container) override;
 
 private:
  struct LaneSearchResult {
    bool found = false;
    std::string lane_id = "";
    int point_index = -1;
  };
 
  void PostProcess(Trajectory* trajectory_ptr, ObstacleClusters* clusters_ptr);
 
  LaneSearchResult SearchExtrapolationLane(const Trajectory& trajectory,
                                           const int num_tail_point);
 
  void ExtrapolateByLane(const LaneSearchResult& lane_search_result,
                         const double extrapolation_speed,
                         Trajectory* trajectory_ptr,
                         ObstacleClusters* clusters_ptr);
 
  void ExtrapolateByFreeMove(const int num_tail_point,
                             const double extrapolation_speed,
                             Trajectory* trajectory_ptr);
 
  double ComputeExtraplationSpeed(const int num_tail_point,
                                  const Trajectory& trajectory);
};
 
}  // namespace prediction
}  // namespace apollo