[Marble-devel] Gps tracking

[Konrad Enzensberger]

Hi Thorsten,

>>where it puts the driving direction always upwards:
yes

>>the third parameter in createFromEuler should allow to rotate the globe
i am not clear about third parameter value.
should it be an angle ? in radians ? or degree?
maybe this angle should be calculated from last gps position to current 
position?

thanks, konrad

----- Original Message ----- 
From: "Torsten Rahn" <tackat at t-online.de>
To: <marble-devel at kde.org>
Sent: Monday, September 05, 2011 5:25 PM
Subject: Re: [Marble-devel] Gps tracking


>
> Hi Konrad,
>
>> Is there a way to rotate the map to allways drive in north direction ? 
>> like
>> navigation devices do?
>
> Well currently it does always have north pointed upwards. You probably 
> mean
> the case where it puts the driving direction always upwards:
>
> This was possible many moons ago: Have a look at:
>
> void MarbleMap::centerOn( const qreal lon, const qreal lat )
> {
>    Quaternion  quat;
>    quat.createFromEuler( -lat * DEG2RAD, lon * DEG2RAD, 0.0 );
>    d->m_viewParams.setPlanetAxis( quat );
>    d->m_textureLayer.setNeedsUpdate();
>
>    emit visibleLatLonAltBoxChanged( d->m_viewParams.viewport()-
>>viewLatLonAltBox() );
> }
>
> IIRC the third parameter in createFromEuler should allow to rotate the 
> globe
> around the axis that is orthonormal to the screen plane.
>
> I recall that at some point we had a method inside MarbleMap which took 
> three
> parameters to accomplish this. Apparently It got removed at one point. 
> Maybe
> we should reintroduce it.
>
> BR,
>
> Torsten
>
>
>
>> thanks for support,
>> konrad
>
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