Public Member Functions | Private Member Functions | Private Attributes
base_local_planner::VoxelGridModel Class Reference

A class that implements the WorldModel interface to provide grid based collision checks for the trajectory controller using a 3D voxel grid. More...

#include <voxel_grid_model.h>

Inheritance diagram for base_local_planner::VoxelGridModel:
Inheritance graph
[legend]

List of all members.

Public Member Functions

virtual double footprintCost (const geometry_msgs::Point &position, const std::vector< geometry_msgs::Point > &footprint, double inscribed_radius, double circumscribed_radius)
 Checks if any obstacles in the voxel grid lie inside a convex footprint that is rasterized into the grid.
void getPoints (pcl::PointCloud< pcl::PointXYZ > &cloud)
void updateWorld (const std::vector< geometry_msgs::Point > &footprint, const std::vector< costmap_2d::Observation > &observations, const std::vector< PlanarLaserScan > &laser_scans)
 The costmap already keeps track of world observations, so for this world model this method does nothing.
 VoxelGridModel (double size_x, double size_y, double size_z, double xy_resolution, double z_resolution, double origin_x, double origin_y, double origin_z, double max_z, double obstacle_range)
 Constructor for the VoxelGridModel.
virtual ~VoxelGridModel ()
 Destructor for the world model.

Private Member Functions

double dist (double x0, double y0, double z0, double x1, double y1, double z1)
void insert (pcl::PointXYZ pt)
double lineCost (int x0, int x1, int y0, int y1)
 Rasterizes a line in the costmap grid and checks for collisions.
void mapToWorld2D (unsigned int mx, unsigned int my, double &wx, double &wy)
void mapToWorld3D (unsigned int mx, unsigned int my, unsigned int mz, double &wx, double &wy, double &wz)
double pointCost (int x, int y)
 Checks the cost of a point in the costmap.
void removePointsInScanBoundry (const PlanarLaserScan &laser_scan, double raytrace_range)
bool worldToMap2D (double wx, double wy, unsigned int &mx, unsigned int &my)
bool worldToMap3D (double wx, double wy, double wz, unsigned int &mx, unsigned int &my, unsigned int &mz)

Private Attributes

double max_z_
 The height cutoff for adding points as obstacles.
voxel_grid::VoxelGrid obstacle_grid_
double origin_x_
double origin_y_
double origin_z_
double sq_obstacle_range_
 The square distance at which we no longer add obstacles to the grid.
double xy_resolution_
double z_resolution_

Detailed Description

A class that implements the WorldModel interface to provide grid based collision checks for the trajectory controller using a 3D voxel grid.

Definition at line 58 of file voxel_grid_model.h.


Constructor & Destructor Documentation

base_local_planner::VoxelGridModel::VoxelGridModel ( double  size_x,
double  size_y,
double  size_z,
double  xy_resolution,
double  z_resolution,
double  origin_x,
double  origin_y,
double  origin_z,
double  max_z,
double  obstacle_range 
)

Constructor for the VoxelGridModel.

Parameters:
size_xThe x size of the map
size_yThe y size of the map
size_zThe z size of the map... up to 32 cells
xy_resolutionThe horizontal resolution of the map in meters/cell
z_resolutionThe vertical resolution of the map in meters/cell
origin_xThe x value of the origin of the map
origin_yThe y value of the origin of the map
origin_zThe z value of the origin of the map
max_zThe maximum height for an obstacle to be added to the grid
obstacle_rangeThe maximum distance for obstacles to be added to the grid

Definition at line 43 of file voxel_grid_model.cpp.

Destructor for the world model.

Definition at line 79 of file voxel_grid_model.h.


Member Function Documentation

double base_local_planner::VoxelGridModel::dist ( double  x0,
double  y0,
double  z0,
double  x1,
double  y1,
double  z1 
) [inline, private]

Definition at line 154 of file voxel_grid_model.h.

double base_local_planner::VoxelGridModel::footprintCost ( const geometry_msgs::Point position,
const std::vector< geometry_msgs::Point > &  footprint,
double  inscribed_radius,
double  circumscribed_radius 
) [virtual]

Checks if any obstacles in the voxel grid lie inside a convex footprint that is rasterized into the grid.

Parameters:
positionThe position of the robot in world coordinates
footprintThe specification of the footprint of the robot in world coordinates
inscribed_radiusThe radius of the inscribed circle of the robot
circumscribed_radiusThe radius of the circumscribed circle of the robot
Returns:
Positive if all the points lie outside the footprint, negative otherwise

Implements base_local_planner::WorldModel.

Definition at line 49 of file voxel_grid_model.cpp.

Definition at line 269 of file voxel_grid_model.cpp.

void base_local_planner::VoxelGridModel::insert ( pcl::PointXYZ  pt) [inline, private]

Definition at line 158 of file voxel_grid_model.h.

double base_local_planner::VoxelGridModel::lineCost ( int  x0,
int  x1,
int  y0,
int  y1 
) [private]

Rasterizes a line in the costmap grid and checks for collisions.

Parameters:
x0The x position of the first cell in grid coordinates
y0The y position of the first cell in grid coordinates
x1The x position of the second cell in grid coordinates
y1The y position of the second cell in grid coordinates
Returns:
A positive cost for a legal line... negative otherwise

Definition at line 94 of file voxel_grid_model.cpp.

void base_local_planner::VoxelGridModel::mapToWorld2D ( unsigned int  mx,
unsigned int  my,
double &  wx,
double &  wy 
) [inline, private]

Definition at line 148 of file voxel_grid_model.h.

void base_local_planner::VoxelGridModel::mapToWorld3D ( unsigned int  mx,
unsigned int  my,
unsigned int  mz,
double &  wx,
double &  wy,
double &  wz 
) [inline, private]

Definition at line 141 of file voxel_grid_model.h.

double base_local_planner::VoxelGridModel::pointCost ( int  x,
int  y 
) [private]

Checks the cost of a point in the costmap.

Parameters:
xThe x position of the point in cell coordinates
yThe y position of the point in cell coordinates
Returns:
A positive cost for a legal point... negative otherwise

Definition at line 173 of file voxel_grid_model.cpp.

void base_local_planner::VoxelGridModel::removePointsInScanBoundry ( const PlanarLaserScan laser_scan,
double  raytrace_range 
) [private]

Definition at line 215 of file voxel_grid_model.cpp.

void base_local_planner::VoxelGridModel::updateWorld ( const std::vector< geometry_msgs::Point > &  footprint,
const std::vector< costmap_2d::Observation > &  observations,
const std::vector< PlanarLaserScan > &  laser_scans 
)

The costmap already keeps track of world observations, so for this world model this method does nothing.

Parameters:
footprintThe footprint of the robot in its current location
observationsThe observations from various sensors
laser_scanThe scans used to clear freespace

Definition at line 182 of file voxel_grid_model.cpp.

bool base_local_planner::VoxelGridModel::worldToMap2D ( double  wx,
double  wy,
unsigned int &  mx,
unsigned int &  my 
) [inline, private]

Definition at line 133 of file voxel_grid_model.h.

bool base_local_planner::VoxelGridModel::worldToMap3D ( double  wx,
double  wy,
double  wz,
unsigned int &  mx,
unsigned int &  my,
unsigned int &  mz 
) [inline, private]

Definition at line 124 of file voxel_grid_model.h.


Member Data Documentation

The height cutoff for adding points as obstacles.

Definition at line 171 of file voxel_grid_model.h.

Definition at line 165 of file voxel_grid_model.h.

Definition at line 168 of file voxel_grid_model.h.

Definition at line 169 of file voxel_grid_model.h.

Definition at line 170 of file voxel_grid_model.h.

The square distance at which we no longer add obstacles to the grid.

Definition at line 172 of file voxel_grid_model.h.

Definition at line 166 of file voxel_grid_model.h.

Definition at line 167 of file voxel_grid_model.h.


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


base_local_planner
Author(s): Eitan Marder-Eppstein, Eric Perko
autogenerated on Sat Dec 28 2013 17:13:51