/usr/share/sensor_msgs/msg/ChannelFloat32.msg is in libsensor-msgs-dev 1.12.3-5.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 | # 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
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