Re: [Navit-users] Navit-0.0.3 crashes when rotating the map, and some first impressions

[KaZeR <ka...@al...>]

Hi Helge, and welcome onboard :)

I had to manually approve your mail. You may want maybe to subscribe to 
the ML (at your convenience).

Helge Hafting a écrit :
> I downloaded navit-0.0.3 from cvs the 11. Very exiting to see a
> open navigation program. I also downloaded the free map of the planet.
>   
Nice to hear :)
> Compiling and installing the gtk version went ok, and
> so did the first test just looking at the map.
>   
So far, so good!
> Then I connected a gps and took it for a drive.
> The program crashed a lot.  After some time I figured
> out that it crashes whenever I make a turn - navit probably
> tries to rotate the map and fails somehow.
>
> Is this a known problem? Or a bad side effect of using the whole
> planet map on a machine with 2GB of memory? The machine did not
> seem to run out of memory though.
>   
This isn't a known problem. It could help us if you could provide a log 
of your trip.
Simply start gpsd as usual, and run : gpspipe -r > logfile.nmea, and 
drive as usual.
Then give us your nmea file, and we'll be able to replay the log and 
investigate your problem.

Also, a gdb stack could help :
install gdb, then run gdb navit
at the gdb prompt, type 'run'
when it crashes, type 'where' and give us the whole error report (IRC, 
mail, bug tracker)

I don't think it could be related to memory issue. Navit runs even on 
some embedded devices like smartphones :)
> Some first impressions:
> * routing seems to work well.
>   
Nice to hear :)
> * The map can be hard to read, for several reasons:
>   - Lakes are colored blue, but the sea is not. All I get
>     is a blue coastline. When looking quickly, one wonders if
>     it is the coast or some river.  But I don't know - maybe this
>     is a map problem rather than a navit problem?
>     Having the sea in the same color as the city doesn't work too well.
>   
Good point. We'll work on that.

>  - The marker showing my car is small and don't stand out too well, 
> especially when both marker and route is dark blue. A two-color marker could
>    improve this - for example the existing blue marker with white outlining.
>   
Good point too. It has been discussed in our channel lately. The cursor 
will probably change soon.
>  - Street names are in a very small font. A bigger one would be nice, 
> especially when zooming in so much that the streets are wide enough for a bigger 
> font.
>   
This can be changed in the layout part of navit.xml

                        <item 
type="highway_city,highway_land,street_4_city,street_4_land,street_n_lanes" 
order="10-18">
                                <label label_size="8" />
                        </item>

The item above describe that streets labels will be tagged with a text 
of 8px when the view is between 10 and 18 (18 means near the ground, 0 
means the highest view possible).


I agree that it isn't really convenient to do, but config screen in 
navit will be for later, there is some other tasks with higher priority.

>  - Streets have names but nothing else. Perhaps this is just a problem with
>    the free map? It is useful to see town, district and country names too . . .
>   
Where would you like thoses informations to be displayed?
And also, yes, OSM currently gives some limitations about the content.
In M&G, you can almost always find street -> town -> country, but it's 
less common currently in OSM.
But OSM grows very fast :)
> -  The route doesn't always show. Zooming out helps in such cases. Doesn't
>    navit want to draw the route when the endpoints are outside the view?
>   
You may want to try the "refresh" and "follow" tags for vehicles :
<vehicle name="Meins" enabled="yes" source="gpsd://localhost" 
color="#0000ff" follow="1" refresh="1"/>


Follow will always center the view on your vehicle.
Refresh will force a refresh of the map each time you moves.
> -  Navit shows the whole route although I have driven halfway. 
>    Omitting the part already travelled, or keeping that in a different
>    color would make it much easier to quickly find the car on the map.
>   
This is weird. Navit should only show the remaining route, from your 
current position to your destination.
Looks like a refresh problem to me. Maybe try the tip above.
> *  Zooming out to view all of europe  makes  things real slow. I guess navit
>    doesn't drop details when zooming out. It'd be nice to see at least
>    the motorways connecting the large cities in such a view.
>   
It does, but perhaps not enough.
If you want, you can try to adjust the "order" value of items you want 
to hide (higher value mean less displayed).
>   
>    I don't drive around with the map zoomed out like this, but it
>    is very useful when planning. I can find a lot of places quickly by
>    first zooming out, and then zoom in on the country in question until I
>    get down to city streets.
>   
Indeed.
>   
> * Map rotation is a problem. I did not find a way to quickly get north up.
>    Turning off the map direction works, but it does not take effect 
> immediately?
>   
It take effect only when refreshing. So you either need the vehicle to 
hit a boundary, or hit the refresh button, or set refresh=1 in your 
vehicle setting.


You have pointed out some interesting points. I'll create some bug 
reports for them.

Feel free to add your own bug reports here : 
http://trac.navit-project.org or comment the ones i'll add.

You may also get live support in our IRC channel : irc.freenode.org 
channel #navit

Thanks for you interest!

K-