[ gpsdrive ] No developer question, but a question about an older version of gpsdrive

[Thomas Schönhütl]

Hi all,

I think I got the lines for the files to change. I try it tomorrow in 
reality and then I will report about the changed lines and the results.

Thank you, so long,

Thomas.


> Hamish wrote:
>   
>> Thomas Schönhütl wrote:
>>   
>>     
>>>> In gpsdrive.h you 'll find
>>>> #define ROUTEREACH (0.02+10*current.groundspeed/(3600*milesconv))
>>>>       
>>>>         
>> ..
>>   
>>     
>>> I recompiled 2.10pre2 with
>>>
>>> */ #define ROUTEREACH (0.02+10*current.groundspeed/(3600*milesconv)) */
>>> #define ROUTEREACH (0.04+10*current.groundspeed/(3600*milesconv))
>>>
>>> in src/gpsdrive.h
>>>
>>> and it seems to be the factor 0.04 which is great on highways, factor 
>>> 0.03 seems to be the correct in cities. I could only test it on a short 
>>> route.
>>>
>>> I will try it with different routes and then I will report my experiences.
>>>     
>>>       
>> Instead of different rules for cities/highways could you make a list of the
>> best time/distance-to-waypoint while at different speeds? Then we could create
>> a single new formula. i.e. it doesn't have to be linear or rules based.
>>
>> Sorry it is poorly worded, I hope that makes sense.
>>   
>>     
>
> I come back to this topic, because I made some new experiences with the 
> speech output.
>
> I changed the factor 0.02 in ROUTEREACH to 0.08 and 0.12 to test the 
> behaviour of my slow Libretto with speechoutput.
>
> 0.08 (in definition of gpsdrive.h #define ROUTEREACH 
> (0.02+10*current.groundspeed/(3600*milesconv))) seems to be quite good 
> with a speed up to 50 km/h. The speechoutput will be given about 400 m 
> before the next waypoint.
>
> 0.12 seems to be quite good with a speed between 50 and 100 km/h. The 
> speechoutput will be given about 600 m before the next waypoint.
>
> 0.2 seems to be quite good with a speed over 100 km/h.
>
> I tried to rewrite the definition of ROUTEREACH in gpsdrive.h to
>
> #define ROUTEREACH1 (0.08+10*current.groundspeed/(3600*milesconv))
> #define ROUTEREACH2 (0.12+10*current.groundspeed/(3600*milesconv))
> #define ROUTEREACH3 (0.2+10*current.groundspeed/(3600*milesconv))
>
> and to add a line
>
> if (current.groundspeed <= 50)
>
> in routes.c (lines 599 and 1108) before the line
>
> if (d <= ROUTEREACH1 || route.forcenext)
>
> but I do not understand the syntax in the right way ...
>
> May be someone can help me out here to find a solution for my problem!?
>
> Thank you very much for your time,
>
> Thomas Schönhütl.
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