{"action":"created","issue":{"url":"https://api.github.com/repos/whoenig/crazyflie_ros/issues/28","repository_url":"https://api.github.com/repos/whoenig/crazyflie_ros","labels_url":"https://api.github.com/repos/whoenig/crazyflie_ros/issues/28/labels{/name}","comments_url":"https://api.github.com/repos/whoenig/crazyflie_ros/issues/28/comments","events_url":"https://api.github.com/repos/whoenig/crazyflie_ros/issues/28/events","html_url":"https://github.com/whoenig/crazyflie_ros/issues/28","id":131725692,"number":28,"title":"Hovering using VICON problem","user":{"login":"OliverFaust","id":17088252,"avatar_url":"https://avatars.githubusercontent.com/u/17088252?v=3","gravatar_id":"","url":"https://api.github.com/users/OliverFaust","html_url":"https://github.com/OliverFaust","followers_url":"https://api.github.com/users/OliverFaust/followers","following_url":"https://api.github.com/users/OliverFaust/following{/other_user}","gists_url":"https://api.github.com/users/OliverFaust/gists{/gist_id}","starred_url":"https://api.github.com/users/OliverFaust/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/OliverFaust/subscriptions","organizations_url":"https://api.github.com/users/OliverFaust/orgs","repos_url":"https://api.github.com/users/OliverFaust/repos","events_url":"https://api.github.com/users/OliverFaust/events{/privacy}","received_events_url":"https://api.github.com/users/OliverFaust/received_events","type":"User","site_admin":false},"labels":[],"state":"open","locked":false,"assignee":null,"milestone":null,"comments":1,"created_at":"2016-02-05T18:58:50Z","updated_at":"2016-02-05T19:06:06Z","closed_at":null,"body":"Hi,\r\nExcellent contribution. \r\n\r\nI am new to Vicon, so the following might be quite trivial to solve. \r\n\r\nThe Crazyflie_tools and the teleop_xbox360 demo are working. However, I am struggling with the hover_vicon demo. To be specific, when I do:\r\nroslaunch crazyflie_demo hover_vicon.launch uri:=radio://0/80/250k frame:=/vicon/crazyflie/crazyflie x:=0 y:=0 z:=1\r\nThere are no errors in the console log, but the RViz GUI shows two errors:\r\n1) Fixed Frame Fixed Frame [world] does not exist\r\n2) crazyflie/base_link No transform from [crazyflie/base_link] to [world]\r\n\r\nAny pointers on what might be wrong?\r\n\r\nThank you for your help in advance."},"comment":{"url":"https://api.github.com/repos/whoenig/crazyflie_ros/issues/comments/180503680","html_url":"https://github.com/whoenig/crazyflie_ros/issues/28#issuecomment-180503680","issue_url":"https://api.github.com/repos/whoenig/crazyflie_ros/issues/28","id":180503680,"user":{"login":"whoenig","id":3613757,"avatar_url":"https://avatars.githubusercontent.com/u/3613757?v=3","gravatar_id":"","url":"https://api.github.com/users/whoenig","html_url":"https://github.com/whoenig","followers_url":"https://api.github.com/users/whoenig/followers","following_url":"https://api.github.com/users/whoenig/following{/other_user}","gists_url":"https://api.github.com/users/whoenig/gists{/gist_id}","starred_url":"https://api.github.com/users/whoenig/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/whoenig/subscriptions","organizations_url":"https://api.github.com/users/whoenig/orgs","repos_url":"https://api.github.com/users/whoenig/repos","events_url":"https://api.github.com/users/whoenig/events{/privacy}","received_events_url":"https://api.github.com/users/whoenig/received_events","type":"User","site_admin":false},"created_at":"2016-02-05T19:06:05Z","updated_at":"2016-02-05T19:06:05Z","body":"Try testing `vicon_bridge` separately: `rosrun vicon_bridge vicon_bridge`. Now look at your tf-tree: `rosrun tf view_frames`. It should generate a pdf with the transformation hierarchy. There should be a world frame and a vicon/crazyflie frame as well."}}