gazebo | Open source robotics simulator
kandi X-RAY | gazebo Summary
kandi X-RAY | gazebo Summary
This is the Gazebo simulator. Gazebo simulates multiple robots in a 3D environment, with extensive dynamic interaction between objects.
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Currently covering the most popular Java, JavaScript and Python libraries. See a Sample of gazebo
gazebo Key Features
gazebo Examples and Code Snippets
Community Discussions
Trending Discussions on gazebo
QUESTION
i have this bit complicated xml file.
...ANSWER
Answered 2021-Jun-10 at 10:42Perhaps instead of
QUESTION
I have installed Gazebo 11 on Ubuntu 20.04 through binary packages. When I launch Gazebo it raises the following error:
...ANSWER
Answered 2021-May-12 at 05:10I had the same problem, and this is what worked for me.
- First remove and purge all the libdart packages.
QUESTION
I am trying to use the LK Optical Flow from this tutorial, to get some motion estimation into a robot simulation made with ROS+Gazebo.
I could manage to make properly the bridge between ROS and OpenCV via cv_bridge, as per the code below, and could implement some sample features which work "frame-by-frame" without major issues.
However, the optical flow tutorial reference seems to accept only video inputs, such as webcam and/or saved video files, and this is where I got stuck.
How could I apply the LK Optical flow in a "frame-by-frame" approach, or configure my cv_bridge to act as a "custom" camera device?
This is my cv_brige so far:
...ANSWER
Answered 2021-Mar-24 at 22:32I would recommend using cv2.calcOpticalFlowPyrLK(old_frame, cur_frame, ...) or cv2.calcOpticalFlowFarneback(old_frame, cur_frame, ...) (dense optical flow). There is a bunch of information about these methods on the cv2 website. From personal experience, these methods work great!
Let me know if you have any questions or problems!
QUESTION
Just to warn you I am creating my website with little experience so my code is very messy (lots of code from trying things out and I don't erase).
My site works when on a Desktop but when I try scrolling on my Ipad I go past the page.
I would like it to stop scrolling once it reaches the end of the last Div.
Here is Screenshot: http://chrisandlisa.com/Images/errorScreenShot.jpeg
My Website: http://chrisandlisa.com
My CSS file is starting to get huge but here is the Code:
...ANSWER
Answered 2021-Apr-15 at 12:06I think your issue is that on the different screen size of the ipad you are seeing an area where your background image doesen't cover.
If you change your css code for .bg1 from background-size: contain; to background-size: cover; it might fix the white gap at the bottom of the page.
QUESTION
I have written the following script with which I aim to detect lines in Gazebo (a simulation environment):
...ANSWER
Answered 2021-Mar-07 at 07:24This method might help you to remove noise from the frame.
QUESTION
So long story short: I had a working docker image where i could show graphical things through the Xserver. I tested it multiple times and everything seemed to work flawlessly. However after installing Nvidia and CUDA i started getting this error:
...ANSWER
Answered 2021-Feb-23 at 09:05It is only gazebo and rviz that was broken after installing nvidia. I fiexed it by following this. The part i missed in my dockerfile was:
QUESTION
Followed Gazebo tutorial (http://gazebosim.org/tutorials?tut=plugins_model&cat=write_plugin) however when typing all the commands Gazebo appears like this
Here is the output from running the server command
And here is the output from running the client command Can you guys please assist me with how to fix this problem?
...ANSWER
Answered 2021-Jan-22 at 17:34I had to change the sdf version from 1.4 to 1.5 and now it works
QUESTION
I'm testing an algorithm on a model of a robot on gazebo, for an experiment i need to perform some blind trials so i need to control a robot without seen it and after a timeout make it visible again via code in real time. i'm coding with python and ros. is it possible ?
...ANSWER
Answered 2020-Sep-14 at 06:00I suppose that you mean you need your robot invisible to some vision-related algorithms running at the same time.
Then I'm afraid once a model is "spawned" into the gazebo world, some feature like transparency can not be changed.
So in my opinion, when you need to change the visibility, maybe you can store the latest states of your robot, like position\velocity etc, remove the invisible model, and then spawn a new visible model in the same states.
Just a quick thought.
QUESTION
I am trying to compile the gazebo example provided by PX4, according to PX4's instructions. I am working on Ubuntu-18.04.
When running the command: make px4_sitl gazebo, following error occurs:
ANSWER
Answered 2020-Aug-03 at 14:31Ok, so simply making the bad path invalid (modified it) forced make to use the right compiler version since it could not find the wrong version anymore.
Weird to see that putting the path of the correct version first in the PATH variable did not seem to have any effect.
QUESTION
I have a drone in a Gazebo environment with a RealSense d435 camera on it. My plan is to use YOLO to find the center of an object of interest, and then find the depth of that point from the depth image. I heard that the depth camera outputs an image where the depth values are encoded in the RGB values. When further looking this up online, I found that there is a pyrealsense2 library that has functions for everything I need.
The implementations I've seen online need you to create a pyrealsense.pipeline() and get your frames from that. The issue is this seems to only work if you have a RealSense camera connected to your computer. Since mine exists in the Gazebo environment, I need a way to get and use the depth frame in a ROS callback. How would I do this? Any pointers would be greatly appreciated
ANSWER
Answered 2020-Jul-17 at 17:52yeah, you can do this with help of a ROS subscriber as follows (most of the code was taken from here):
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Install gazebo
BUILD_TESTING (bool) [default False] Include the test suite compilation in the default make call (make all).
ENABLE_DIAGNOSTICS If this is defined, it will enable diagnostic timers using the macros from Diagnostics.hh (see also the standalone diagnostics example): DIAG_TIMER_START("name") DIAG_TIMER_LAP("name") DIAG_TIMER_STOP("name")
USE_HOST_CFLAGS (bool) [default True] Check the building machine for supported compiler optimizations and use them to build the software.
USE_UPSTREAM_CFLAGS (bool) [default True] Use the recommended gazebo developers compiler optimizations flags.
USE_EXTERNAL_TINYXML (bool) [default True] Use external copy of tinyxml during the build.
USE_EXTERNAL_TINYXML2 (bool) [default True] Use external copy of tinyxml2 during the build.
USE_LOW_MEMORY_TEST (bool) [default False] Use reduced version of tests which need less quantity of RAM memory available.
FORCE_GRAPHIC_TESTS_COMPILATION (bool) [default False] Ignore system checks to look for graphic and acceleration support and compile all the test suites.
ENABLE_SCREEN_TESTS (bool) [default True] Enable or disable tests that need screen rendering to run properly. Headless machines or machines with the screen turned off should set this to False.
USE_PCH (bool) [default False] Use GNU Precompiled Headers. Only works with the gnu compiler.
ENABLE_TESTS_COMPILATION (DEPRECATED) The new behaviour is to call 'make tests' explicitly to compile the test suite. Calling 'make' or 'make all' won't compile the tests.
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