Vivian Meazza schrieb: > Maik Justus > > >> Sent: 18 December 2007 21:02 >> To: FlightGear developers discussions >> Subject: [Flightgear-devel] External Cargo,was: Re: >> screenshots (and "snapshots") >> >> >> Hi, >> Vivian Meazza schrieb am 18.12.2007 00:27: >> >>> Maik wrote >>> >>> >>>> Hi, >>>> Melchior FRANZ schrieb am 17.12.2007 02:18: >>>> >>>> >>>>> * Georg Vollnhals -- Monday 17 December 2007: >>>>> >>>>> >>>>> >>>>>> Just now (!!!) remembering Torsten's Dragonfly banner-trick (!!!) >>>>>> which is pretty similar: >>>>>> >>>>>> >>>>>> >>>>> Yes, it's clearly a job for Maik's winch/anchor feature. He has >>>>> already lifted me via MP: I was in a sgs233, and Maik >>>>> >>>>> >>>> lifted me with a >>>> >>>> >>>>> bo105. There's just no visible rope (yet). >>>>> >>>>> >>>>> >>>>> >>>> Can an external force be added to the AIBallistic Objects? >>>> >>>> >>> I don't see why not. Just designing on the back of an envelope - we >>> already have one - wind. So in principle we add something >>> >> like another >> >>> wind. >>> >>> Not in the next few days though. >>> >>> Vivian >>> >>> >> I had a look to AIBase.?xx and AIBallisitic.?xx. I think all >> we need is >> already there. The objects speed can be modified by a Nasal script. >> YASims winch/aerotow/anchor can be connected directly to any >> AI object >> and (with some Nasal code, which copies the location) to >> anything else. >> The force on the other object is calculated and stored in the >> property >> tree. Some Nasal code only need to take this force, multiply it by dt >> and divide it by the objects mass and add the result to the objects >> speed (which need to be converted to (and afterwards back from) the >> earth-coordinate system). If we use a AIBallistic object, the gravity >> and drag effects would be calculated automatically. >> Therefore external cargo missions, SAR missions or even banner-towing >> with realistic forces on the aircraft should be possible with fg1.0.0 >> >> > > I've just a few moments ago added a few lines of code to AIBallistic which > apply an external force (using the same math as above). The rest works as > before. I just need few properties to set the magnitude and vector of the > external force and it will be done, at least for testing. It's trivial > really, but I'm assuming that the external force applies no rotational force > to the object. I haven't a great deal of time available in the run up to > Christmas so no promises on completion. > > Vivian > > > > Awesome,
Gérards nice "winch example picture" has been the start-up for a wonderful new future feature for FlightGear. Thank you to all contributors! Georg EDDW ------------------------------------------------------------------------- SF.Net email is sponsored by: Check out the new SourceForge.net Marketplace. It's the best place to buy or sell services for just about anything Open Source. http://ad.doubleclick.net/clk;164216239;13503038;w?http://sf.net/marketplace _______________________________________________ Flightgear-devel mailing list Flightgear-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/flightgear-devel
