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<p style="margin: 0px;">Seems I solved the problem. I just added a fake second point in the message with the same distance right next to the first one. Now it works. Seems that the laser message has a minimum of 2 points in order to be displayed.</p>
<p style="margin: 0px;"><span><br />
</span></p>
<p style="margin: 0px;"><span>Cheers,</span></p>
<p style="margin: 0px;"><span> </span></p>
<p style="margin: 0px;"><span>Markus<br />
</span></p>
<p style="margin: 0px;"> </p>
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"Lorenz M�senlechner" <moesenle@in.tum.de> hat am 19. November 2010 um 13:59 geschrieben:<br />
<br />
> It was just a guess :)<br />
><br />
> I think rviz uses the laser_geometry package to transform the laser<br />
> scan to a point cloud. I would check if calling it directly produces a<br />
> point cloud with one point. You could also publish the resulting point<br />
> cloud directly and display it in rviz.<br />
><br />
> Lorenz<br />
><br />
> ><br />
> > Thank you,<br />
> ><br />
> > <br />
> ><br />
> > but this did not work either. If I use a normal hokuyo, without intensities it<br />
> > works fine. I tink the problem is that it only has one reading and this collides<br />
> > with the min_angle, max_angle and scan_time, somehow internally.<br />
> ><br />
> > <br />
> ><br />
> ><br />
> > <br />
> ><br />
> > <br />
> ><br />
> > "Lorenz Mösenlechner" <moesenle@in.tum.de> hat am 19. November 2010 um 13:41<br />
> > geschrieben:<br />
> ><br />
> > > Hi,<br />
> > ><br />
> > > I would try adding an intensity measurement.<br />
> > ><br />
> > > Lorenz<br />
> > ><br />
> > > ><br />
> > > ><br />
> > > > Dear all,<br />
> > > ><br />
> > > > I have te following problem: I want to display a single point laser<br />
> > > > measurement<br />
> > > > in RVIZ using LaserScan message. Terefor I filled most of the laser message<br />
> > > > parameters manualle. The range was set by the laser<br />
> > > > (Leuze ODSL-30)<br />
> > > ><br />
> > > > The message generated looks fine, but when i subscrive to the /scan RVIZ<br />
> > > > refused<br />
> > > > to display it.<br />
> > > ><br />
> > > > When I use rostopic echo, the message looks like this<br />
> > > ><br />
> > > ><br />
> > > > =================================================================<br />
> > > > ---<br />
> > > > header:<br />
> > > > Â seq: 144<br />
> > > > Â stamp:<br />
> > > > Â Â Â secs: 1290166306<br />
> > > > Â Â Â nsecs: 126582347<br />
> > > > Â frame_id: base_link<br />
> > > > angle_min: 0.0<br />
> > > > angle_max: 0.00999999977648<br />
> > > > angle_increment: 0.00999999977648<br />
> > > > time_increment: 0.10000000149<br />
> > > > scan_time: 0.10000000149<br />
> > > > range_min: 0.20000000298<br />
> > > > range_max: 30.0<br />
> > > > ranges: [3.4630000591278076]<br />
> > > > intensities: []<br />
> > > > ---<br />
> > > > header:<br />
> > > > Â seq: 145<br />
> > > > Â stamp:<br />
> > > > Â Â Â secs: 1290166306<br />
> > > > Â Â Â nsecs: 226820561<br />
> > > > Â frame_id: base_link<br />
> > > > angle_min: 0.0<br />
> > > > angle_max: 0.00999999977648<br />
> > > > angle_increment: 0.00999999977648<br />
> > > > time_increment: 0.10000000149<br />
> > > > scan_time: 0.10000000149<br />
> > > > range_min: 0.20000000298<br />
> > > > range_max: 30.0<br />
> > > > ranges: [3.4619998931884766]<br />
> > > > intensities: []<br />
> > > ><br />
> > > > =========================================================<br />
> > > ><br />
> > > > Maybe the params angle_min: 0.0<br />
> > > > angle_max: 0.00999999977648<br />
> > > > angle_increment: 0.00999999977648<br />
> > > > time_increment: 0.10000000149<br />
> > > > scan_time: 0.10000000149<br />
> > > ><br />
> > > > are wrong (because I have only one scan in contrast to the hokuyo which has<br />
> > > > multi scans per reading).<br />
> > > ><br />
> > > > I though also to use the RANGE sensor message but there seems no way to<br />
> > > > display<br />
> > > > it in RVIZ as well.<br />
> > > ><br />
> > > > Any Ideas?<br />
> > > ><br />
> > > > Cheers,<br />
> > > ><br />
> > > > Markus<br />
> > ><br />
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><br />
><br />
> --<br />
> Lorenz M�senlechner | moesenle@in.tum.de<br />
> Technische Universit�t M�nchen | Boltzmannstr. 3<br />
> 85748 Garching bei M�nchen | Germany<br />
> http://ias.cs.tum.edu/ | Tel: +49 (89) 289-17750
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