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Spring-Loaded Link/Joint in Robot URDF

I'd like to make a link/joint spring-loaded in my URDF, so that it takes a certain level of force to displace it and so that it returns to a base/equilibrium position when not in contact with anything....
S. Gun's user avatar
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1 answer
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How to reduce the turbulence of a robotic arm, when it's end effector touches a surface?

I am working on a project related to tele-robotic ultrasound where I have to tele-operate a virtual UR5 robotic arm with a end-effector(a thin rod) through a haptic device in PyBullet. When I make the ...
RaMathuzen's user avatar
1 vote
1 answer
101 views

Bullet vs SimMechanics: Inverse Dynamics and sensed forces/torques

This question may be a little broad, but I could not find any other information. How accurate are the inverse dynamics functions in SimMechanics compared to Bullet? How accurate are the sensed/...
Lemonbonbon's user avatar
1 vote
0 answers
145 views

How to interpret and apply results from Inverse Dynamics

I am applying Recursive Newton Euler Inverse Dynamics to a simple two link model. If I apply the result torques and forces using PhysX or Bullet Physics I get unexpected results. The model spins and ...
Ian Deane's user avatar
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1 answer
5 views

tf2 conversion (bullet to geometry_msgs)

I wish to convert from Gazebo math::Pose type to one of the geometry_msgs ROS messages. I can convert from ...
user avatar
1 vote
1 answer
22 views

ROS with Chrono Engine

Hi All, I was shopping for a physics engine that did, well, everything, and everybody pointed me toward Chrono. It certainly does seem to fit the bill. Of course, not everybody is like me and wants ...
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0 votes
1 answer
2 views

how to install bullet on Indigo in Ubuntu

I have been trying to build this project, it has tf2_bullet which is part of geometry_experimental in it and depends on bullet, ...
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1 answer
1 view

Help with bullet and vrpn_client on Hyrdro on Ubuntu 12.04

Hello, I am having to upgrade to hydro and in the process of getting my enviroment set up I ran into a stumbling block. ROS_VRPN_Client requires bullet3. After downloading bullet3 and making it I ...
user avatar
0 votes
1 answer
3 views

How to meet Bullet requirement for rosdep tf2_bullet? Or can I trick rosdep?

I am attempting to do a ROS install on Raspbian (pi). 3.10.25+ Pretty much everything has gone very well until I tried to install the tf2_bullet package that I need for create_node. To install new ...
user avatar
0 votes
1 answer
2 views

Installing Hydro from source: package 'bullet' not found

Hi everyone! I'm in the middle of building Hydro from Source on an ARM board. I got to building the 'tf2_bullet' catkin package and ran into the following error: ...
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1 answer
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Fuerte: Install bullet from source

I'm currently setting up with Fuerte and need to install bullet so I can use the geometry package. However, I need to install from source and the repository given on the ROS.org bullet page seems to ...
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1 answer
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hydro tf::Transform misses .asBt() methods?

I'm moving from fuerte to hydro. As I'm interfacing with bullet directly for physical simulations I regularly used tf::Transform::asBt() which seems to be missing in the tf implementation for hydro. I ...
user avatar
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1 answer
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Difficulty moving from electric to groovy - bullet issues

Hi, I'm trying to upgrade a system from electric to groovy. Unfortunately, I'm getting stuck since the codebase uses btQuaternion. The short version though is, I can't find the migration script ...
user avatar
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1 answer
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how to use bullet in hydro?

Hi, I have a package that depends on bullet and try to compile on hydro, however I couldn't find ros-hydro-bullet nor bullet key in rosdistro/hydro/release.yaml. Originally posted by Kei Okada on ROS ...
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1 answer
4 views

Bullet library roadmap

The ROS bullet wiki states the following: The version of bullet distributed with ROS currently has patches against the official version of bullet. Our hope is to move towards the official version so ...
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1 answer
5 views

deformation on Gazebo and ROS, possible?

Hi, i'm working with ROS electric , and Gazebo, and i'm working on colission detection , and now i'm wanna go one step more, i mean, make deformation between objects. I know that exist a library Call ...
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2 answers
1 view

using bullet physics 2.81 with my ros package (a new angle)

Hi everyone, I posted something similar earlier but have been tracking down the weirdness and now have more insight. But I still have a question on what is going on and thus am reposting. So the ...
user avatar
0 votes
1 answer
1 view

Depending on bullet in a catkin package (Groovy)

Dear all, I was wondering how to find bullet header in a catkin package (Groovy). As far as I can tell, I should not use rospack to do so but as no CMake macro is provided by ros-groovy-bullet, I don'...
Thomas Moulard's user avatar
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1 answer
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ROS Answers SE migration: Bullet stack

i want to use some elements of bullet library in my code. In particular I want to convert from quaternions to roll,pitch and yaw. I've seen that i can do: ...
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0 votes
1 answer
3 views

error: ‘class btMatrix3x3’ has no member named ‘getRPY’ when building tf

Hello -- I'm trying to build tf from source on a beagle. I built the fuerte-ros-base.rosinstall and that all installed properly. ...
user avatar
0 votes
1 answer
22 views

How do you convert a quaternion into an axis-angle representation?

Hello, I'd like to convert an orientation from geometry_msgs::Quaternion to an axis-angle representation (http://en.wikipedia.org/wiki/Axis-angle_representation). Similarly, I'd like to convert back ...
user avatar
0 votes
1 answer
2 views

How to solve 'src/BulletSoftBody/btSoftBodyInternals.h: In function 「void ZeroInitialize(T&) [with T = btSoftBody::Node]」'?

I use ubuntu 11.10 and fuerte. When I rosmake my PCL project, it shows: ...
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0 votes
1 answer
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bullet_migration: electric and fuerte compatibility

Hello, I'm trying to upgrade a project from Electric to Fuerte while still maintaining Electric compatibility (some systems will be on Electric for a while). I ran into an issue with tf and bullet. In ...
user avatar
0 votes
1 answer
8 views

Error "error: ‘Matrix3x3’ is not a member of ‘tf’" while building bosch-ros-pkg

I got errors while building some packages separately in bosch_shared_autonomy (pkgs are: safe_teleop_{ base, pr2, stage }). All errors look similar as the one below....
IsaacS's user avatar
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0 votes
1 answer
4 views

performance comparison of math libraries

I was wondering if anyone has benchmarked the performance of the commonly used math libraries in the ROS community such as the KDL, Bullet & Eigen. In my work, I have to do hundreds of thousands ...
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0 votes
3 answers
8 views

what are quaternions and how can I use them?

I have seen quaternions in tf and bullet but I don't know what they are or how to use them. Originally posted by tfoote on ROS Answers with karma: 58457 on 2011-05-17 Post score: 11
Tully's user avatar
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1 answer
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Can gazebo_ros actually use bullet?

I've seen references to bullet and its use with gazebo, but haven't seen any specific information on whether its work in progress or its actually possible now. Anyone know if its possible and how to ...
user avatar
0 votes
1 answer
4 views

bullet euler angle methods

What exactly are the differences between: getEulerZYX/setEulerZYX getEulerYPR/setEulerYPR getRPY/setRPY EDIT: I'm looking at bullet (and the ROS patches). Originally posted by tperkins on ROS ...
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1 answer
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Python bullet bindings

Does anyone know if there are python bindings for bullet? I stumbled upon the bullet_python package http://www.ros.org/browse/details.php?name=bullet_python, but I couldn't quite figure out how to ...
user avatar