Drake
PurePursuit< T > Class Template Reference

PurePursuit computes the required steering angle to achieve a goal point on an continuous planar path. More...

#include <drake/automotive/pure_pursuit.h>

## Public Member Functions

PurePursuit ()=delete

Does not allow copy, move, or assignment
PurePursuit (const PurePursuit &)=delete

PurePursuitoperator= (const PurePursuit &)=delete

PurePursuit (PurePursuit &&)=delete

PurePursuitoperator= (PurePursuit &&)=delete

## Static Public Member Functions

static T Evaluate (const PurePursuitParams< T > &pp_params, const SimpleCarParams< T > &car_params, const LaneDirection &lane_direction, const systems::rendering::PoseVector< T > &pose)
Evaluates the required steering angle in radians using the pure-pursuit method. More...

static const maliput::api::GeoPosition ComputeGoalPoint (const T &s_lookahead, const LaneDirection &lane_direction, const systems::rendering::PoseVector< T > &pose)
Computes the goal point at a distance s_lookahead from the closest position on the curve in the intended direction of travel, and with_s and pose are the direction of travel and PoseVector for the ego vehicle. More...

## Detailed Description

### template<typename T> class drake::automotive::PurePursuit< T >

PurePursuit computes the required steering angle to achieve a goal point on an continuous planar path.

The path represents as the set of r = 0 positions along a Maliput lane, and a goal point is selected as a pre-defined lookahead distance along the path in the intended direction of travel. The algorithm outputs the steering angle required to guide the vehicle toward the goal point based on its current position in global coordinates.

See [1] and the corresponding .cc file for details on the algorithm.

Instantiated templates for the following kinds of T's are provided:

• double

[1] Coulter, R. Implementation of the Pure Pursuit Path Tracking Algorithm. Carnegie Mellon University, Pittsburgh, Pennsylvania, Jan

## Constructor & Destructor Documentation

 PurePursuit ( const PurePursuit< T > & )
delete
 PurePursuit ( PurePursuit< T > && )
delete
 PurePursuit ( )
delete

## Member Function Documentation

 const GeoPosition ComputeGoalPoint ( const T & s_lookahead, const LaneDirection & lane_direction, const systems::rendering::PoseVector< T > & pose )
static

Computes the goal point at a distance s_lookahead from the closest position on the curve in the intended direction of travel, and with_s and pose are the direction of travel and PoseVector for the ego vehicle.

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 T Evaluate ( const PurePursuitParams< T > & pp_params, const SimpleCarParams< T > & car_params, const LaneDirection & lane_direction, const systems::rendering::PoseVector< T > & pose )
static

Evaluates the required steering angle in radians using the pure-pursuit method.

Assumes zero elevation and superelevation.

Parameters
 pp_params contains the lookahead_distance, the distance along the path based on the closest position on the path to the vehicle. car_params contains the wheelbase of the vehicle. lane_direction is a LaneDirection containing a reference lane and the direction of travel along the positive-s coordinate. pose is the PoseVector for the ego vehicle.

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 PurePursuit& operator= ( const PurePursuit< T > & )
delete
 PurePursuit& operator= ( PurePursuit< T > && )
delete

The documentation for this class was generated from the following files: