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@gvdhoorn, unfortunately this is not really an option for me. I use a code base from another person. And there this was

@gvdhoorn Do you have any advice how to solve my problem?

@gvdhoorn I use cv_bridge, and did what is told in this answer. I created another catkin_workspace with py3 and source i

I use cv_bridge, and did what is told in this answer. I created another catkin_workspace with py3 and source it as --ext

ModuleNotFoundError: No module named 'error' When importing rospy in python 3.6 I get the following error: Python 3.6.9

@Weasfas Thanks for the input. I deleted setting the seq as I don't need this anymore anyway. rosrun rqt_tf_tree rqt_tf_

Could not find a connection between 'X' and 'Y' because they are not part of the same tree.Tf has two or more unconnecte

I successfully published pointclouds by converting them to ROSMsg. But is it somehow possible to publish a vector containing multiple pointclouds?

I tried this:

pcl::PointCloud<ClassPoint> out;
 ....
sensor_msgs::PointCloud2 out_msg;
pcl::toROSMsg(out, out_msg);

std::vector<sensor_msgs::PointCloud2> clouds(2); 
clouds[0] = out_msg;
out_msg.header.frame_id = corner_frame_name;

pub_merged_clouds.publish(clouds);

while I got

pub_merged_clouds = nh.advertise<std::vector<sensor_msgs::PointCloud2>>(merged_clouds_topic, 1);

This unfortunately doesn't work. I get the following error when compiling

error: ‘const class std::vector<sensor_msgs::PointCloud2_<std::allocator<void> > >’ has no member named ‘__getMD5Sum’
     return m.__getMD5Sum().c_str();

Is there a way to do this? Thanks alot!

@gvdhoorn @pavel92 Thank you both for your help! This really helped. Now I now how to create my own msg type. But as gvd

@stevemacenski Thank you for you reply. Could you elaborate? How exactly can I create an own sensor_msgs type?

@stevemacenski Thank you for you reply. Could you elaborate?

Publishing a vector of point clouds I successfully published pointclouds by converting them to ROSMsg. But is it somehow

Publishing a vector of point clouds I successfully published pointclouds by converting them to ROSMsg. But is it somehow

I tried to transform my pointcloud2 in python like stated here.

But somehow the result is not correct. I am not able to visualize the pointcloud I get as a result in rviz. This is why I tried to just use an empty transformation on my pointcloud and I get some different cloud as a result. Does anyone know what I am doing wrong?

Thanks!

from tf2_sensor_msgs.tf2_sensor_msgs import do_transform_cloud

def transform_pointcloud(self, pointcloud):
    trans = TransformStamped()
    trans.header.stamp = pointcloud.header.stamp
    trans.header.frame_id = pointcloud.header.frame_id
    trans.header.seq = pointcloud.header.seq
    trans.child_frame_id = "corner"
    trans.transform.translation.x = 0
    trans.transform.translation.y = 0
    trans.transform.translation.z = 0
    trans.transform.rotation.x = 0
    trans.transform.rotation.y = 0
    trans.transform.rotation.z = 0
    trans.transform.rotation.w = 0

    newpointcloud = do_transform_cloud(pointcloud, trans)
    return newpointcloud

@aPonza omg..so stupid from me. This fixed it. Thanks alot!

Transform PointCloud2 doesn't work as expected I tried to transform my pointcloud2 in python like stated here. But some

I tried using this method (in python) but it somehow doesn't work as expected. That's why I used a transformation with 0

I tried using this method (in python) but it somehow doesn't work as expected. That's why I used a transformation with 0