laser_geometry.laser_geometry.LaserProjection Class Reference

Classes
class	ChannelOption

Public Member Functions
def	__init__ (self)
def	projectLaser (self, scan_in, range_cutoff=-1.0, channel_options=ChannelOption.DEFAULT)

Static Public Attributes
float	LASER_SCAN_INVALID = -1.0
float	LASER_SCAN_MAX_RANGE = -3.0
float	LASER_SCAN_MIN_RANGE = -2.0

Private Member Functions
def	__projectLaser (self, scan_in, range_cutoff, channel_options)

Private Attributes
	__angle_max
	__angle_min
	__cos_sin_map

Detailed Description

A class to Project Laser Scan

This calls will project laser scans into point clouds. It caches
unit vectors between runs (provided the angular resolution of
your scanner is not changing) to avoid excess computation.

By default all range values less thatn the scanner min_range,
greater than the scanner max_range are removed from the generated
point cloud, as these are assumed to be invalid.

If it is important to preserve a mapping between the index of
range values and points in the cloud, the recommended approach is to
pre-filter your laser scan message to meet the requirement that all
ranges are between min and max_range.

The generate PointClouds have a number of channels which can be enabled
through the use of ChannelOption.
- ChannelOption.INTENSITY - Create a channel named "intensities" with the
intensity of the return for each point.
- ChannelOption.INDEX     - Create a channel named "index" containing the
index from the original array for each point.
- ChannelOption.DISTANCE  - Create a channel named "distance" containing
the distance from the laser to each point.
- ChannelOption.TIMESTAMP - Create a channel named "stamps" containing the
specific timestamp at which each point was measured.

Definition at line 36 of file laser_geometry.py.

Constructor & Destructor Documentation

__init__()

def laser_geometry.laser_geometry.LaserProjection.__init__

(

self

)

Definition at line 78 of file laser_geometry.py.

Member Function Documentation

__projectLaser()

def laser_geometry.laser_geometry.LaserProjection.__projectLaser (   self,   scan_in,   range_cutoff,   channel_options  )

private

Definition at line 102 of file laser_geometry.py.

projectLaser()

def laser_geometry.laser_geometry.LaserProjection.projectLaser	(		self,
			scan_in,
			range_cutoff = -1.0,
			channel_options = ChannelOption.DEFAULT
	)

Project a sensor_msgs::LaserScan into a sensor_msgs::PointCloud2.

Project a single laser scan from a linear array into a 3D
point cloud. The generated cloud will be in the same frame
as the original laser scan.

Keyword arguments:
scan_in -- The input laser scan.
range_cutoff -- An additional range cutoff which can be
    applied which is more limiting than max_range in the scan
    (default -1.0).
channel_options -- An OR'd set of channels to include.

Definition at line 85 of file laser_geometry.py.

Member Data Documentation

__angle_max

laser_geometry.laser_geometry.LaserProjection.__angle_max

private

Definition at line 80 of file laser_geometry.py.

__angle_min

laser_geometry.laser_geometry.LaserProjection.__angle_min

private

Definition at line 79 of file laser_geometry.py.

__cos_sin_map

laser_geometry.laser_geometry.LaserProjection.__cos_sin_map

private

Definition at line 82 of file laser_geometry.py.

LASER_SCAN_INVALID

float laser_geometry.laser_geometry.LaserProjection.LASER_SCAN_INVALID = -1.0

static

Definition at line 65 of file laser_geometry.py.

LASER_SCAN_MAX_RANGE

float laser_geometry.laser_geometry.LaserProjection.LASER_SCAN_MAX_RANGE = -3.0

static

Definition at line 67 of file laser_geometry.py.

LASER_SCAN_MIN_RANGE

float laser_geometry.laser_geometry.LaserProjection.LASER_SCAN_MIN_RANGE = -2.0

static

Definition at line 66 of file laser_geometry.py.

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

• laser_geometry.py