ysl208's profile - activity

my which python doesn't return /usr/bin/python, how do i change that?

This goal was canceled because another goal was recieved by the simple action server Hi, I am trying to actuate the gri

yeah, i did rostopic echo /gripper/goal

This goal was canceled because another goal was recieved by the simple action server Hi, I am trying to actuate the gri

I have two objects A and B, each in the form of geometry_msgs/PoseStamped. I would like to calculate the displacement (translation & rotation) vector that I can apply to any (similar) object A' and arrive to a (similar) object B' (respectively).

1. I guess the vector should also be of the form PoseStamped.

2. For translation, can I simply take B.PoseStamped.position.x - A.PoseStamped.position.x (similar for y,z)?

3. For the quaternion, I am not sure if I can simply do division (since adding angles in quaternions is done by multiplication?) i.e. B.PoseStamped.quaternion.x/A.PoseStamped.quaternion.x ?

I would like to avoid having to transform the quaternion to euler and back.

how do you stop the recording in cpp?

Detect stacked objects with PCL2 Hi, I'm using the surface_perception library which segments surface objects using PCL2

I'm using the surface_perception package to get some table top data but I've been getting this error message

Invalid argument passed to lookupTransform argument source_frame in tf2 frame_ids cannot be empty

after running the surface segmentation for the multiple times and I can't seem to figure out what the problem is.

The error message appears when i launch this file:

<launch>
  <include file="$(find rosbridge_server)/launch/rosbridge_websocket.launch" />
  <node pkg="tf2_web_republisher" type="tf2_web_republisher" name="tf2_web_republisher" launch-prefix="xterm -e gdb --args"/>
</launch>

i tried adding the launch-prefix="xterm -e gdb --args" to the tf2_web_republisher node but it just shows up the same error messages without indicating where its occuring.

An odd thing that happens is that the visualisation shows one of the axes to be enlarged as shown here

I know this is related to some empty frame_ids but i cant seem to figure out where they are. When I run

rostopic echo /tf2_web_republisher/result

then all frame ids are empty even when there's no error message.

any advice would be highly appreciated!

so I included an extra if statement to make sure it doesnt try to lookup the transform if the source or target frames ar

i tried doing a grep for empty frame_id for both /tf and /tf_static but didnt get anything. Will try to download the sou

Invalid argument passed to lookupTransform argument source_frame in tf2 frame_ids cannot be empty I'm using the surface_

did you find a solution to this?

get YAML list of dictionary items with ros::param in C++ I would like to define a list of items in a yaml file which I r

I didnt delete the question? it's still there, i marked your answer as correct

I removed ROS aand reinstalled it but my assimp packages had the wrong version again so I was back at square 1. I ended

When I try to run roslaunch baxter_moveit_config demo_baxter.launch, I get the error

/opt/ros/indigo/lib/rviz/rviz: symbol lookup error: /opt/ros/indigo/lib/libgeometric_shapes.so: undefined symbol: _ZN6Assimp8Importer18SetPropertyIntegerEPKciPb

and it crashes. These are my assimp packages:

$ apt list --installed | grep assimp
assimp-utils/trusty,now 3.0~dfsg-2 amd64 [installed,upgradable to: 3.2~dfsg-3~urp8+1]
libassimp-dev/trusty,now 3.2~dfsg-3~urp8+1 amd64 [installed]
libassimp-doc/trusty,now 3.0~dfsg-2 all [installed,upgradable to: 3.2~dfsg-3~urp8+1]
libassimp3/trusty,now 3.2~dfsg-3~urp8+1 amd64 [installed,automatic]
python-pyassimp/trusty,now 3.2~dfsg-3~urp8+1 all [installed]

I tried to solve it according to a previous thread but the mentioned solution did not work.

Any help? I feel like I have tried everything that I could but keep going in circles...

EDIT: This is what I did previously:

My assimp libraries were too high, so i reverted them to 3.0 manually (I downloaded the .deb file from launchpad and installed them using dbpk)

$ apt list --installed | grep assimp
assimp-utils/trusty,now 3.0~dfsg-2 amd64 [installed,upgradable to: 3.2~dfsg-3~urp8+1]
libassimp-dev/trusty,now 3.0~dfsg-2 amd64 [installed,upgradable to: 3.2~dfsg-3~urp8+1]
libassimp-doc/trusty,now 3.0~dfsg-2 all [installed,upgradable to: 3.2~dfsg-3~urp8+1]
libassimp3/trusty,now 3.0~dfsg-2 i386 [installed,upgradable to: 3.2~dfsg-3~urp8+1]
python-pyassimp/trusty,now 3.0~dfsg-2 all [installed,upgradable to: 3.2~dfsg-3~urp8+1]

However, once that was done, I would get this error message when starting rviz:

/opt/ros/indigo/lib/rviz/rviz: error while loading shared libraries: libassimp.so.3: wrong ELF class: ELFCLASS32

since this didnt work, I did a sudo apt-get -f install again and ended up with the 3.2 assimp versions as mentioned above.

it worked! thanks!

I edited my post so that it is a bit more clear. Sorry for the confusion

Unable to run moveit because of assimp packages When I try to run roslaunch baxter_moveit_config demo_baxter.launch, I g

my current version is libassimp3/trusty,now 3.2~dfsg-3~urp8+1 amd64 [installed,automatic], what should i do?

this was my previous error message. so should i manually revert the packages again to version 3.0?

Unable to run moveit because of assimp packages When I try to run roslaunch baxter_moveit_config demo_baxter.launch, I g

Hi, I'm facing the same issue but all of my assimp packages (assimp-utils, libassimp-dev/-doc/3, python-pyassimp) were a