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2020-07-20 11:37:20 -0500 commented answer Combining Approximate and Exact Time Synchronization Policies with message_filters

Thanks for this! I was hoping that the messages would be available within the same callback function. Is that possible i

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2020-07-17 14:47:50 -0500 edited answer the terminal response global 'name ' is not defined

It is generally better to wrap these two functions into a Python class, and you can then set your global variables to th

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2020-07-17 11:28:56 -0500 answered a question the terminal response global 'name ' is not defined

It is generally better to wrap these two functions into a Python class, and you can then set your global variables to th

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2020-07-17 10:18:27 -0500 commented question How to properly use ROS service

You could just create a C++ class on the node side and save the returned value from the server as a class variable.

2020-07-17 10:08:10 -0500 asked a question Combining Approximate and Exact Time Synchronization Policies with message_filters

Combining Approximate and Exact Time Synchronization Policies with message_filters Is there a way to use both Approximat

2020-06-22 16:36:58 -0500 commented answer Using sensor_msgs/PointCloud2 natively

This was very helpful! Thank you.

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2020-04-22 20:38:19 -0500 commented answer Extract a Volume of points from a PointCloud2 message

Thanks Steve, those make a ton of sense! I'm actually doing this filtering on a bunch of PCD files (and not from pointcl

2020-04-22 20:38:00 -0500 commented answer Extract a Volume of points from a PointCloud2 message

Thanks Steve, those make a ton of sense! I'm actually doing this filtering on a bunch of PCD files (and not from pointcl

2020-04-22 16:13:47 -0500 commented question LoRa with ROS - possible topic for master thesis

Sounds like a good idea, although LoRa is slow and very sensitive to obstructions/reflections and works best with line-o

2020-04-22 15:54:50 -0500 commented answer Extract a Volume of points from a PointCloud2 message

Steve, a follow-up question. Is there a way to visually draw these cropboxes in the original pointcloud so I could debug

2020-04-22 15:52:58 -0500 asked a question Way to visually debug output of pcl::CropBox<PointT>

Way to visually debug output of pcl::CropBox<pointt> I'm trying to extract multiple CropBoxes from with a PointClo

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2020-04-09 12:54:24 -0500 commented answer Extract a Volume of points from a PointCloud2 message

Thanks, Steve! I'm not sure how I didn't stumble upon this before.

2020-04-09 12:54:04 -0500 marked best answer Extract a Volume of points from a PointCloud2 message

Hi all, I'm trying to achieve something simple, yet I can't seem to find a way to do this. I have a PointCloud2 (as a .pcd file) and a bounding box defined in the same frame as the PointCloud2. I want to extract all the points that lie inside that bounding box and save them as a new .pcd file with the centroid of the box set as the origin of that point cloud.

A sample bounding box looks like this:

"bbox": {
            "position": {
                "position": {
                    "y": -24.204870224, 
                    "x": 23.0722198486, 
                    "z": -2.88637971878
                }, 
                "orientation": {
                    "y": -0.0256392564625, 
                    "x": 0.01510348171, 
                    "z": 0.704603254795, 
                    "w": 0.708977282047
                }
            }, 
            "size": {
                "y": 1.84718394279, 
                "x": 3.94384384155, 
                "z": 1.66313385963
            }
        }

So I have the position (which I want to be the origin of the new PointCloud), the size of the box, and also the orientation as a quaternion.

How can I do this? Any pointers to PCL tutorials would be helpful as well. Thank you!

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2020-04-09 03:02:08 -0500 asked a question Extract a Volume of points from a PointCloud2 message

Extract a Volume of points from a PointCloud2 message Hi all, I'm trying to achieve something simple, yet I can't seem t