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_PointCloud.py

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"""autogenerated by genmsg_py from PointCloud.msg. Do not edit."""
import roslib.message
import struct

import sensor_msgs.msg
import geometry_msgs.msg
import std_msgs.msg

class PointCloud(roslib.message.Message):
  _md5sum = "d8e9c3f5afbdd8a130fd1d2763945fca"
  _type = "sensor_msgs/PointCloud"
  _has_header = True #flag to mark the presence of a Header object
  _full_text = """# This message holds a collection of 3d points, plus optional additional
# information about each point.

# Time of sensor data acquisition, coordinate frame ID.
Header header

# Array of 3d points. Each Point32 should be interpreted as a 3d point
# in the frame given in the header.
geometry_msgs/Point32[] points

# Each channel should have the same number of elements as points array,
# and the data in each channel should correspond 1:1 with each point.
# Channel names in common practice are listed in ChannelFloat32.msg.
ChannelFloat32[] channels

================================================================================
MSG: std_msgs/Header
# Standard metadata for higher-level stamped data types.
# This is generally used to communicate timestamped data 
# in a particular coordinate frame.
# 
# sequence ID: consecutively increasing ID 
uint32 seq
#Two-integer timestamp that is expressed as:
# * stamp.secs: seconds (stamp_secs) since epoch
# * stamp.nsecs: nanoseconds since stamp_secs
# time-handling sugar is provided by the client library
time stamp
#Frame this data is associated with
# 0: no frame
# 1: global frame
string frame_id

================================================================================
MSG: geometry_msgs/Point32
# This contains the position of a point in free space(with 32 bits of precision).
# It is recommeded to use Point wherever possible instead of Point32.  
# 
# This recommendation is to promote interoperability.  
#
# This message is designed to take up less space when sending
# lots of points at once, as in the case of a PointCloud.  

float32 x
float32 y
float32 z
================================================================================
MSG: sensor_msgs/ChannelFloat32
# This message is used by the PointCloud message to hold optional data
# associated with each point in the cloud. The length of the values
# array should be the same as the length of the points array in the
# PointCloud, and each value should be associated with the corresponding
# point.

# Channel names in existing practice include:
#   "u", "v" - row and column (respectively) in the left stereo image.
#              This is opposite to usual conventions but remains for
#              historical reasons. The newer PointCloud2 message has no
#              such problem.
#   "rgb" - For point clouds produced by color stereo cameras. uint8
#           (R,G,B) values packed into the least significant 24 bits,
#           in order.
#   "intensity" - laser or pixel intensity.
#   "distance"

# The channel name should give semantics of the channel (e.g.
# "intensity" instead of "value").
string name

# The values array should be 1-1 with the elements of the associated
# PointCloud.
float32[] values

"""
  __slots__ = ['header','points','channels']
  _slot_types = ['Header','geometry_msgs/Point32[]','sensor_msgs/ChannelFloat32[]']

  def __init__(self, *args, **kwds):
    """
    Constructor. Any message fields that are implicitly/explicitly
    set to None will be assigned a default value. The recommend
    use is keyword arguments as this is more robust to future message
    changes.  You cannot mix in-order arguments and keyword arguments.
    
    The available fields are:
       header,points,channels
    
    @param args: complete set of field values, in .msg order
    @param kwds: use keyword arguments corresponding to message field names
    to set specific fields. 
    """
    if args or kwds:
      super(PointCloud, self).__init__(*args, **kwds)
      #message fields cannot be None, assign default values for those that are
      if self.header is None:
        self.header = std_msgs.msg._Header.Header()
      if self.points is None:
        self.points = []
      if self.channels is None:
        self.channels = []
    else:
      self.header = std_msgs.msg._Header.Header()
      self.points = []
      self.channels = []

  def _get_types(self):
    """
    internal API method
    """
    return self._slot_types

  def serialize(self, buff):
    """
    serialize message into buffer
    @param buff: buffer
    @type  buff: StringIO
    """
    try:
      _x = self
      buff.write(_struct_3I.pack(_x.header.seq, _x.header.stamp.secs, _x.header.stamp.nsecs))
      _x = self.header.frame_id
      length = len(_x)
      buff.write(struct.pack('<I%ss'%length, length, _x))
      length = len(self.points)
      buff.write(_struct_I.pack(length))
      for val1 in self.points:
        _x = val1
        buff.write(_struct_3f.pack(_x.x, _x.y, _x.z))
      length = len(self.channels)
      buff.write(_struct_I.pack(length))
      for val1 in self.channels:
        _x = val1.name
        length = len(_x)
        buff.write(struct.pack('<I%ss'%length, length, _x))
        length = len(val1.values)
        buff.write(_struct_I.pack(length))
        pattern = '<%sf'%length
        buff.write(struct.pack(pattern, *val1.values))
    except struct.error as se: self._check_types(se)
    except TypeError as te: self._check_types(te)

  def deserialize(self, str):
    """
    unpack serialized message in str into this message instance
    @param str: byte array of serialized message
    @type  str: str
    """
    try:
      if self.header is None:
        self.header = std_msgs.msg._Header.Header()
      end = 0
      _x = self
      start = end
      end += 12
      (_x.header.seq, _x.header.stamp.secs, _x.header.stamp.nsecs,) = _struct_3I.unpack(str[start:end])
      start = end
      end += 4
      (length,) = _struct_I.unpack(str[start:end])
      start = end
      end += length
      self.header.frame_id = str[start:end]
      start = end
      end += 4
      (length,) = _struct_I.unpack(str[start:end])
      self.points = []
      for i in range(0, length):
        val1 = geometry_msgs.msg.Point32()
        _x = val1
        start = end
        end += 12
        (_x.x, _x.y, _x.z,) = _struct_3f.unpack(str[start:end])
        self.points.append(val1)
      start = end
      end += 4
      (length,) = _struct_I.unpack(str[start:end])
      self.channels = []
      for i in range(0, length):
        val1 = sensor_msgs.msg.ChannelFloat32()
        start = end
        end += 4
        (length,) = _struct_I.unpack(str[start:end])
        start = end
        end += length
        val1.name = str[start:end]
        start = end
        end += 4
        (length,) = _struct_I.unpack(str[start:end])
        pattern = '<%sf'%length
        start = end
        end += struct.calcsize(pattern)
        val1.values = struct.unpack(pattern, str[start:end])
        self.channels.append(val1)
      return self
    except struct.error as e:
      raise roslib.message.DeserializationError(e) #most likely buffer underfill


  def serialize_numpy(self, buff, numpy):
    """
    serialize message with numpy array types into buffer
    @param buff: buffer
    @type  buff: StringIO
    @param numpy: numpy python module
    @type  numpy module
    """
    try:
      _x = self
      buff.write(_struct_3I.pack(_x.header.seq, _x.header.stamp.secs, _x.header.stamp.nsecs))
      _x = self.header.frame_id
      length = len(_x)
      buff.write(struct.pack('<I%ss'%length, length, _x))
      length = len(self.points)
      buff.write(_struct_I.pack(length))
      for val1 in self.points:
        _x = val1
        buff.write(_struct_3f.pack(_x.x, _x.y, _x.z))
      length = len(self.channels)
      buff.write(_struct_I.pack(length))
      for val1 in self.channels:
        _x = val1.name
        length = len(_x)
        buff.write(struct.pack('<I%ss'%length, length, _x))
        length = len(val1.values)
        buff.write(_struct_I.pack(length))
        pattern = '<%sf'%length
        buff.write(val1.values.tostring())
    except struct.error as se: self._check_types(se)
    except TypeError as te: self._check_types(te)

  def deserialize_numpy(self, str, numpy):
    """
    unpack serialized message in str into this message instance using numpy for array types
    @param str: byte array of serialized message
    @type  str: str
    @param numpy: numpy python module
    @type  numpy: module
    """
    try:
      if self.header is None:
        self.header = std_msgs.msg._Header.Header()
      end = 0
      _x = self
      start = end
      end += 12
      (_x.header.seq, _x.header.stamp.secs, _x.header.stamp.nsecs,) = _struct_3I.unpack(str[start:end])
      start = end
      end += 4
      (length,) = _struct_I.unpack(str[start:end])
      start = end
      end += length
      self.header.frame_id = str[start:end]
      start = end
      end += 4
      (length,) = _struct_I.unpack(str[start:end])
      self.points = []
      for i in range(0, length):
        val1 = geometry_msgs.msg.Point32()
        _x = val1
        start = end
        end += 12
        (_x.x, _x.y, _x.z,) = _struct_3f.unpack(str[start:end])
        self.points.append(val1)
      start = end
      end += 4
      (length,) = _struct_I.unpack(str[start:end])
      self.channels = []
      for i in range(0, length):
        val1 = sensor_msgs.msg.ChannelFloat32()
        start = end
        end += 4
        (length,) = _struct_I.unpack(str[start:end])
        start = end
        end += length
        val1.name = str[start:end]
        start = end
        end += 4
        (length,) = _struct_I.unpack(str[start:end])
        pattern = '<%sf'%length
        start = end
        end += struct.calcsize(pattern)
        val1.values = numpy.frombuffer(str[start:end], dtype=numpy.float32, count=length)
        self.channels.append(val1)
      return self
    except struct.error as e:
      raise roslib.message.DeserializationError(e) #most likely buffer underfill

_struct_I = roslib.message.struct_I
_struct_3I = struct.Struct("<3I")
_struct_3f = struct.Struct("<3f")

---

sensor_msgs
Author(s): Maintained by Tully Foote/tfoote@willowgarage.com
autogenerated on Fri Mar 1 15:05:53 2013