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2015-11-22 15:23:42 -0500 asked a question Use 2D/3D lazer scaner to creat 3D pointcloud map

Hallo

I have a robot with two 2D laser (one for SLAM another for poincloud map). I can find the position of robot by Odom parameter, and I use a 2D lazer scaner and move or turn It, then I save the data of mesure and transform them into map coordinate Frames. At last, I can use the data transformed to creat a 3D pointcloud map. So I'm trying to find a package who can save the sensor_msgs/LaserScan massage and creat a 3D pointcloud map.

THX

2015-11-04 07:38:05 -0500 asked a question why map frame isn't continuous

I try to understand the different coordinate frame in ROS. I see a explication of map frame like follow, "The coordinate frame called map is a world fixed frame, with its Z-axis pointing upwards. The pose of a mobile platform, relative to the map frame, should not significantly drift over time. The map frame is not continuous, meaning the pose of a mobile platform in the map frame can change in discrete jumps at any time. In a typical setup, a localization component constantly re-computes the robot pose in the map frame based on sensor observations, therefore eliminating drift, but causing discrete jumps when new sensor information arrives. The map frame is useful as a long-term global reference, but discrete jumps make it a poor reference frame for local sensing and acting." So my question is why the map frame is not continuous? Isn't all the coordinate frame continuous? thx

http://www.ros.org/reps/rep-0105.html

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2015-08-13 10:16:46 -0500 asked a question gazebo _ros_pkgs

I want to creat a plugin in gazebo, so i need the gazebo_ros_package. I use linux 14.04 and ROS Indigo and gazebo 6. I try to install the gazebo_ros_package;

$ sudo apt-get install ros-indigo-gazebo-ros-pkgs ros-indigo-gazebo-ros-control

But it reponse that I need gazebo2 ,ros-indigo-gazebo-ros,ros-indigo-gazebo-ros and so on

then I use

$ sudo git clone https://github.com/ros-simulation/gaz...

It works but when I use

rosrun gazebo_ro gazebo

It give me something like this

/opt/ros/indigo/share/gazebo_ros_pkgs/gazebo_ros/scripts/gazebo: 25: .: Can't open /share/gazebo//setup.sh

where is the problem?

2015-08-13 10:16:45 -0500 asked a question Problem for install gazebo_ros_package

I want to creat a plugin in gazebo, so i need the gazebo_ros_package. I use linux 14.04 and ROS Indigo and gazebo 6. I try to install the gazebo_ros_package;

$ sudo apt-get install ros-indigo-gazebo-ros-pkgs ros-indigo-gazebo-ros-control

But it reponse that I need gazebo2 ,ros-indigo-gazebo-ros,ros-indigo-gazebo-ros and so on

then I use

$ sudo git clone https://github.com/ros-simulation/gaz...

It works but when I use

rosrun gazebo_ro gazebo

It give me something like this

/opt/ros/indigo/share/gazebo_ros_pkgs/gazebo_ros/scripts/gazebo: 25: .: Can't open /share/gazebo//setup.sh

where is the problem?